Number 1
The complete reaction:
[tex]MgO\text{ + H}_2O\text{ = Mg\lparen OH\rparen}_2[/tex]Magnesium oxide + water
MgO + H2O = Mg(OH)2
------------------
Number 2
The reaction:
[tex]2Na\text{ + Cl}_2\text{ = 2NaCl}[/tex]2 Na + Cl2 = 2 NaCl
------------------
Number 3
The reaction:
[tex]SO_3\text{ + H}_2O\text{ = H}_2SO_4[/tex]-----------------
Number 4
[tex]Al\text{ + PO}_4=\text{ Al\lparen PO}_4)_3[/tex]----------------
Number 5
[tex]S\text{ +O}_2=\text{ SO}_2[/tex]If the reaction occurs between K2CO3(aq) and Cu(NO3)2(aq) and the equation is properly balanced with the smallest whole-number coefficients, what is the sum of the coefficients for all reactants and products?
Answer: 5
Balanced Reaction:
[tex]1K_2CO_3 + 1Cu(NO_3)_2[/tex] ⇒ [tex]2KNO_3 + 1CuCO_3[/tex]
When taking the coefficients we are left with 1 + 1 + 2 + 1 = 5
Al(s) + H2SO4(aq) --> Al2(SO4)3(aq) + H2(g)
Consider the unbalanced equation above. What volume of H2 (in L) will be produced at 52.0°C and 755 torr if 4.85 g of Al are reacted with 125. mL of 0.140M H2SO4?
Note: Use molar masses with at least as many significant figures as the data given.
Al(s) + H₂SO₄(aq) --> Al₂(SO₄)₃(aq) + H₂(g)
Consider the unbalanced equation above. volume of H₂ (in L) will be produced at 52.0°C and 755 torr if 4.85 g of Al are reacted with 125. mL of 0.140M H₂SO₄ is 6.72 L.
The balanced given equation is :
2Al(s) + 3H₂SO₄(aq) --> Al₂(SO₄)₃(aq) + 3H₂(g)
mass of Al = 4.85 g
no. of moles of Al = mass / molar mass
= 4.85 / 26.98
= 0.17 mol
2 mole of Al produce 3 mole of H₂
0.17 moles produced = 0.255 mole of H₂
using the formula :
PV = nRT
P = 755 torr = 0.99 atm
R = 0.82 L atm / mol K
V = nRT / P
= (0.25 × 0.082 × 325) / 0.99
= 6.72 L
Volume of H₂ produced = 6.72 L
Thus, Al(s) + H₂SO₄(aq) --> Al₂(SO₄)₃(aq) + H₂(g)
Consider the unbalanced equation above. volume of H₂ (in L) will be produced at 52.0°C and 755 torr if 4.85 g of Al are reacted with 125. mL of 0.140M H₂SO₄ is 6.72 L.
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Balance the following redox reactions by inspection:
a) KCl(s) + O2(g) --> KClO3
b) NH3(g) + O2(g) --> NO(g) + H2O(g)
To see the number of atoms of any element in a molecule multiply the stoichiometry of that molecule to the number that is written on the foot of that element in that molecule the balanced equation are
[tex]2KCL+3O_{2} \rightarrow 2KClO_{3}[/tex]
[tex]2NH_{3} +\frac{5}{2} O_{2} \rightarrow 2NO+3H_{2} O[/tex]
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side
In first , The skeletal reaction is
[tex]KCl+O_{2} \rightarrow KClO_{3}[/tex]
The number of oxygen atoms on left side is 2 while on product side it is 3 so to balance multiply by 3 to [tex]O_{2}[/tex] and by 2 to product side
[tex]KCl+3O_{2} \rightarrow 2KClO_{3}[/tex]
The number of atoms of Potassium and chlorine on left and right are 1 and 1 while on right side it is 2,2 so multiply [tex]KCl[/tex] by 2
The balanced equation is
[tex]2KCl+3O_{2} \rightarrow 2KClO_{3}[/tex]
In second the skeltal equation is
[tex]NH_{3} +O_{2} \rightarrow NO+H_{2} O[/tex]
The number of hydrogen atom is 3 while on produt side it is 2 so multiply [tex]NH_{3}[/tex] by 2 and [tex]H_{2} O[/tex] by 3
[tex]2NH_{3} +O_{2} \rightarrow NO+3H_{2} O[/tex]
now balance nitrogen
[tex]2NH_{3} +O_{2} \rightarrow 2NO+3H_{2} O[/tex]
Now balance oxygen and the balanced equation is
[tex]2NH_{3} +\frac{5}{2} O_{2} \rightarrow 2NO+3H_{2} O[/tex]
Thus the two balanced equation are
[tex]2KCL+3O_{2} \rightarrow 2KClO_{3}[/tex] and
[tex]2NH_{3} +\frac{5}{2} O_{2} \rightarrow 2NO+3H_{2} O[/tex]
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Everybody wants to be us.
Alkalai Metals
Alkalai Earth Metals
Noble Gasses
Halogens
Answer:
Noble Gases
Explanation:
For this question, what does one of them have that the others don't?
Alkali Metals - These are in column 1 of the periodic table. They are the ones that have a charge of positive 1 since they give away their 1 electron in order to be stable.
Alkali Earth Metals - These are in column 2 of the periodic table. They are the ones that have a charge of positive 2 since they give away their 2 electrons in order to be stable.
Noble Gases - These are the elements in the last column of the periodic table. These elements do not need to give away or accept electrons because they are complete and stable!
Halogens - These are in column 17 in the periodic table. They are right next to the halogens, but still are not complete as they need 1 more electron in order to be stable. These elements have a charge of -1 because they take away an electron from another element (mainly the alkali metals) in order to be stable.
So, based off of their definitions, the only ones that do not need to gain or lose electrons are the noble gases. This is because they are complete and stable, the only ones out of these that do not need anything.
I wanted to know if I picked the correct ones
A chemical equilibrium is a state where the concentrations are not changing, in a closed system. the concentrations do not change not because the reactions are stopped but because the direct and inverse reactions are occurring at the same rate, this ongoing reactions is because it is considered a dynamic system.
witch color of light has the least energy?
Answer: Red
Explanation:
What is the Lewis structure for butyl thiol (CH3CH2CH2CH2SH)?
The Lewis dot structure for butyl thiol.
Lewis systems, also called Lewis dot formulas, Lewis dot systems, electron dot structures, or Lewis electron dot structures, are diagrams that display the bonding among atoms of a molecule, as well as the lone pairs of electrons that could exist inside the molecule.
A Lewis structure is based totally on the idea of the octet rule, in which atoms share electrons so that each atom has 8 electrons in its outer shell. for example, an oxygen atom has six electrons in its outer shell.
A Lewis shape is a totally simplified representation of the valence shell electrons in a molecule. it is used to expose how the electrons are arranged around man or woman atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the 2 atoms
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How many molecules are in 3.41 kg glucose, C6H₁2O6?
114.05× 10²³ molecules are present in 3.41kg or 3410g of glucose
We know the relationship between no of moles and molar mass:
n = W / M
where,
n = no of moles = ( ?)
W = Given mass = (3.41kg)
M = Molar mass = ( molar mass of glucose is 180g)
Convert 3.41kg into grams we get 3.41 × 1000 = 3410g
n = W / M
= 3410 / 180
= 18.94 moles
Number of molecules is related to no of moles and Avogadro's number as:
N = n × NA
where,
N = no of molecules/no of particles/no of atoms = ?
n = no of moles = ( 18.94 moles - found out from above formula )
NA = Avogadro's number = ( 6.022 × 10²³ )
N = n × NA
= 18.94 × 6.022 × 10²³
= 114.05× 10²³ molecules
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PLEASE HELP 50 POINTS ASAP!!! REAL ANSWERS ONLY OR DELETED!
Answer:
The sun is a young star because it's composed of many gaseous layers and made up of Hydrogen/Helium and as shown on the graph we can see that's what young stars are made of meaning the sun is just a young star.
Explanation:
Land masses are formed as a result of
Land masses are formed as a result of Tectonic forces.
Tectonic forces regularly arise while tectonic plates merge collectively or pull aside. This displaces Land masses, causing geographical functions and landforms to be created. for example, tectonic plates pushing collectively ought to cause mountain tiers to form.
Like Lego blocks built on top of one another, big elements of the Earth's continental land loads had been created by way of tens of hundreds of short eruptions or bursts of molten magma that were transferred unexpectedly from the mantle and lower-maximum crust and then injected as huge horizontal sheets into the higher crust.
The phrase tectonic is derived from the Greek phrase tekton, which means “builder.” Tectonic techniques construct landforms in particular by using causing the uplift or subsidence of rock cloth—blocks, layers, or slices of the Earth's crust, molten lavas, or even huge hundreds that consist of the complete crust and uppermost.
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What is the molarity of a solution containing 17.3 g of KCl in 231 mL of KCl solution?
Answer:
The molarity of the solution is 0.99M.
Explanation:
The molaruty if a solution represents the amount of solute moles contained in 1 liter (1000ml) of a solution.
1st) In this case, we have 17.3g of KCl, so we have to use the KCl molar mass (74.5g/mol) to convert grams into moles:
[tex]17.3g*\frac{1mole}{74.5g}=0.23moles[/tex]Now we know that there are 0.23 moles of the solute KCl.
2nd) We have 0.23 moles of KCl contained in 231 mL of solution, so to calculate the molarity (moles of solute contained in 1000mL of solution), we can use a mathematical rule of three:
[tex]\begin{gathered} 231mL-0.23moles \\ 1000mL-x=\frac{1000mL*0.23moles}{231mL} \\ x=0.99moles \end{gathered}[/tex]Finally, the molarity of the solution is 0.99M.
what is the molarity of h3po4 solution if 0.05 M ba(oh)2 is needed to neutralize 20.00 ml of h3po4
The molarity of H₃PO₄ solution is 0.017 M.
What is the molarity of a solution?The molarity of a solution is the amount in moles of the solute present in a given volume of solution.
In a titration, the unknown molarity of a given solution can be determined using the formula below:
CaVa / CbVb = Na/Nb
where;
Ca and Cb are the concentrations of the two solutionsVa and Vb are the respective volumesNa and Nb are the number of moles of A and B.Equation of reaction: 3 NaOH + H₃PO₄ ---> Na₃PO₄ + 3 H₂O
From the data given:
Ca = ?
Va = 20.00 mL
Cb = 0.05 M
Vb = 20.00 mL
Ca = 0.05 * 20 * 1/20 * 3
Ca = 0.017 M
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Use the diagram to identify each item.
Atomic number:
Chemical symbol:
Number of protons:
Atomic mass:
Number of electrons:
Number of electrons in the outer shell:
Number of electrons in the n = 3 shell:
Number of neutrons :
The element given in the diagram is molybdenum with symbol Mo and atomic number 42. The number of protons and electron is 42 and the atomic mass is 96.
Number of neutrons is 54. Electrons in the valence shell is 6 and number of electrons in n=3 shell is 18.
What is molybdenum?Molybdenum is 42nd element in periodic table. It is a transition metal with d4 valence shell. The atomic number of molybdenum is 42. The atomic number is the number of electrons in an atom. Thus number of electrons is 42.
Mass number of Mo is 96 it is the sum of number of protons and neutrons.
For a neutral atom, the number of electrons equal to the number of protons. Thus number of protons is 42.Number of neutrons can be found by substracting proton number from mass number.
number of neutrons = 96 -42 =54.
The electronic configuration of Mo is 2,8,18,13,1. The last 6 electrons are located in 4s and 4d orbitals. Thus number of valence electrons is 6.
The shell n = 3 is M shell. The M shell of Mo contains 18 electrons.
Therefore Molybdenum Mo is 42 nd element with protons, electrons and neutrons 42, 42, 54 respectively and have 6 outer shell electrons and 18 electrons in n=3 shell.
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which of the following have expressions has a product of 36
Answer:
3/4
Explanation:
questions about energy
Scientists define energy as the ability to do work.
In physics, power is the quantitative asset this is transferred to a frame or to a physical system, recognizable inside the overall performance of labor and within the form of warmth and light. power is a conserved quantity the regulation of conservation of electricity states that power may be converted in shape, however not created or destroyed.
Strength is defined as the capacity to do paintings, that's the ability to exert pressure inflicting displacement of an object. in spite of this complicated definition, its means is quite simple: energy is simply the pressure that causes matters to move. energy is split into sorts capacity and kinetic.
Power exists in many special forms. Examples of those are mild energy, warmth power, mechanical electricity, gravitational energy, electric energy, sound strength, chemical power, nuclear or atomic strength, and so on. every form may be converted or changed into the opposite form.
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If I have 80 L of H2 how many moles of H2 do I have? (H- 1.01 g/mol) Only number do not give units.
Assuming that it is at STP (Standard Temperature and Pressure), in these conditions, 1 mol of gas is equal to 22.4 Liters of volume, therefore if we have 80 Liters of H2 gas:
22.4 L = 1 mol
80 L = x moles
x = 3.6 moles of H2 gas
The rate constant for a reaction at 40.0°C is exactly 4 times that at 20 0°C Calculate the energy of activation for the reaction.
Explanation:
Data provided:
T2 = 40.0 °C
(absolute temperature = T2 = 40.0 °C + 273 = 313 K)
------
T1 (absolute) = 20.0 °C + 273 = 293 K
------
The rate constant for a reaction at 40.0 °C is exactly 4 times that at 20.0 °C, mathematically:
k2/k1 = 4
------------------------
Here is used the Arrhenius expression as follows:
[tex]ln\text{ }\frac{k2}{k1}=\text{ }\frac{Ea}{R}x\lbrack\frac{1}{T1}-\frac{1}{T2}\rbrack[/tex]R = universal gas constant = 8.314 J/mol K
Ea = activation energy
------------------------
Procedure:
[tex]\begin{gathered} ln\text{ 4 = }\frac{Ea}{8.314\text{ J/mol K}}x\lbrack\frac{1}{293\text{ K}}-\frac{1}{313\text{ K}}\rbrack \\ 1.386\text{ = }\frac{Ea}{8.314}x(2.18x10^{-4}) \\ Ea\text{ = 52858.73 J/mol} \\ \end{gathered}[/tex]Answer: Ea = 52858.73 J/mol
The table shows the number of charged particles in an ion. (THIS IS URGENT, THANK YOU!!!!)
Charged Particles
Charge on Particle Number of Particles
Positive 3
Negative 2
A negatively charged substance is brought near the ion. What will most likely happen and why? (5 points)
The ion will repel the substance because the ion has more electrons than protons.
The ion will repel the substance because the ion has more protons than electrons.
The ion will attract the substance because the ion has more electrons than protons.
The ion will attract the substance because the ion has more protons than electrons.
When a negatively charged substance is brought near the ion, the ion will attract the substance because the ion has more protons than electrons.
What is an ion?We define an ion as a specie that either has more negative charges than positive charges, or a specie that has more positive charges than negative charges. In either case, the number of charges that you have in an ion can never be the same, the number of one type of charge must be greater than the number of the other type of charge.
We can now see that from the table that we have in the question, the number of the positive charges is greater than the number of the negative charges. This implies that what we have is a positive charge and in consonance with the first law of electrostatics, it is going to be attracted by the negative charge.
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PORFAVOR : IDEA PRINCIPAL, IDEA SECUNDARIA, CONCLUSION DEL AUTOR, Y LA OPINION DEL SIGUIENTE TEXTO:
La idea principal de este texto es descifrar los mecanismos por los cuales la marihuana puede causar al excitacion de las neuronas y de este modo llevar a cambios en el cerebro. La idea secundaria es comprender el rol de la dopamina como neurotrasmisor. La opinion del autor es que el consumo prolongado de canabis podria estar asociado a daño irreversible.
¿Qué efectos tienen los quimicos presentes en la marihuana en nuestro cerebro?Las celulas nerviosas (es decir, neuronas) reaccionan de acuerdo a la presencia de neurotrasmisores en el medio extracelular, este es uno de los mecanismos que usa el sistema nervioso para responder a estimulos ambientales.
La marihuana o cannabis posee substancias psicoactivas que se asocian a receptores presentes en las membranas neuronales de modo similar a neurotrasmisores naturales tales como la dopamina.
En conclusión, este estudio trata sobre los efectos de la marihuana como sustancia psicoactiva en el cerebro y del mecanismo de accion de los neurotrasmisores, lo cual se puede asociar a los efectos de esta droga en celulas neuronales.
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The color of the longest visible
wavelength is
Answer:
???
Explanation:
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Complete and balance the following half reaction. Assume the reaction occurs in basic media.
Cl−⟶ClO3−
Balance the following half reaction occurs in basic media then Cl → ClO₃⁻
6OH⁻ + Cl⁻¹ → ClO₃⁻¹ + 3H₂O + 6e⁻
The concentration of OH⁻ is more than the solution called as basic medium
Here given reaction is
Cl → ClO₃⁻
Then the steps we have to follow are:
Balancing in basic solution then
First get the acidic answer means in acidic answer, Break into half reaction Balance all element except H and OBalance O by adding H₂OBalance H by adding H⁺Then add electron to the more positive sideBalance electronCancel the likes substances on opposite sideThen rewrite the correct equationAdd as many OH⁻ as you have H⁺ to both sideThen simplify and cancel out like H₂OThen 2H⁺ + 2OH⁻ → 2H₂OAnd then 1 H = 1H⁺2Oxygen = 2H₂OThen rewrite the correct equationAnd the equation is 6OH⁻ + Cl⁻¹ → ClO₃⁻¹ + 3H₂O + 6e⁻ in basic media
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a gas mixture at 20.0 C and 2.0 atm contains 0.40 mol of H2, 0.15 mol of O2, and 0.50 mol of N2. Assuming ideal behavior, what is the partial pressure of hydrogen gar [H2] in the mixture?
The partial pressure of hydrogen gas in the mixture is:0.53334 atm.
What is partial pressure?
partial pressure. noun. the pressure that a gas would have if it took up the entire volume that the mixture of gases currently occupies.
P total,and the total number of moles in the mixture would be,
n total=nH2+nO2+nN2
This means that you could write
P total.V=ntotal.RT
p total=n total.RT/V
This is equivalent to
p total=[nH2+nO2+nN2].RT/V
therefore,
P total =PH2+PO2+pN2
now, to get the partial pressure of,let's Hydrogen gas
RT/V=Ptotal/nH2+nO2+nN2
therefore
PN2=XN2.p total
similarly,
PO2=XO2.p total
PN2=XN.p total
The total number of moles will be
[tex]ntotal[/tex] = 0.40+0.15+0.50=1.50 moles.
[tex]PH2[/tex]=0.40/1.50*2.0 atm =0.5334 atm.
[tex]PO2[/tex]=0.15/1.50*2.0 atm =0.2 atm.
[tex]PN2[/tex]=0.50/1.50*2.0 atm =0.66 atm.
Hence, the partial pressure of hydrogen gas in the mixture is:0.53334 atm.
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The ammonia (NH3)molecule is the conjugate base of the NH4+ (called "ammonium") ion. a weak acid. An aqueous solution of NH3 has a pH of 1 1.6. Write the net ionic equation for the reaction that makes an aqueous solution of NH3 basic. (The answer looks very similar to Eq. 5 in the introduction to this experiment.)
NH3 is a weak base. In solution we write NH3(aq).
The question says NH3 because ammonia is a weak base and does not ionize strongly in water. To write the net ion equation, we need to remove the spectator ion. Removing the spectator ion leaves the net ion equation. This process can be repeated for each reaction to obtain the net ionic equation.
The net ionic equation describes only the species participating in the reaction while the full ionic equation also includes the spectator ion. A net ionic equation is a chemical equation of a reaction that lists only the species involved in the reaction. The net ionic equation is commonly used in acid-base neutralization reactions double displacement reactions, and redox reactions.
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For her science project, a student collects data on deer spotted in a field each day. For the first five days of her study, she counted 23, 16, 18, 27, and 19 deer. What type of observation do these data represent?
A. an inferred observation
B. a quantitative observation
C. a qualitative observation
D. a classified observation
The type of observation the data represent is a quantitative observation.
What is quantitative observation?Quantitative observation can be described as a method of gathering and analyzing data. Quantitative observation uses numerical data and statistical calculations to measure research and draw conclusions. It usually involves variables with a numerical value.
From the data given above which are in numerical dorm, we can conclude that the observation represented is a quantitative observation.
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A 10.05 gram sample of BaCl2 x H20 hydrate is heated and the resulting mass is 8.57 grams. a. What is the formula for the hydrate?b. What is the name of the hydrate?
Step 1: Let's calculate the quantity in moles of anhydrous barium chloride using the resulted mass after the heating divided by its molar mass (molar mass of BaCl2 is 208.23 g/mol)
so:
8.57/208.23 = 0.04 moles of BaCl2
Step 2: Now let's calculate the quantity in moles of water. But first, we need to calculate the mass of H2O. For this, we just subtract the mass before the heating by the mass after the heating. The water evaporated because of the heat.
mass of H2O = 10.05 - 8.57 = 1.48 g
Now we divide the mass by its molar mass to find the quantity in moles (molar mass of water is 18 g/mol)
1.48/18 = 0.082 moles of H2O
Step 3: Now we determine the number ratio:
0.082/0.04 = 2
So the formula is:
Answer: a. BaCl2 x 2H2O
b. barium chloride dihydrate
You have 25.00 g of nonane C9H20 and 15.00 g oxygen (O2) for a combustion reaction. If you actually make 0.99 grams of water, what is the percent yield?
The first step to solve this question is to state the combustion reaction for nonane:
[tex]C_9H_{20}+14O_2\rightarrow9CO_2+10H_2O[/tex]After this, we have to convert the given masses of nonane and oxygen to moles using their molecular masses:
[tex]25.00gC_9H_{20}\cdot\frac{1mol}{128.2gC_9H_{20}}=0.20molC_9H_{20}[/tex][tex]15.00gO_2\cdot\frac{1mol}{32gO_2}=0.47molO_2[/tex]Use the stoichiometric ratio to determine the number of moles of oxygen that react with 0.20 moles of nonane.
[tex]0.20molC_9H_{20}\cdot\frac{14molO_2}{1molC_9H_{20}}=2.8molO_2[/tex]From this, we can conclude that the limiting reactant of the reaction is oxygen, which means that we have to base our calculations on the amount of oxygen that reacts. Use the stoichiometric ratio of oxygen to water to find the amount of water produced:
[tex]0.47molO_2\cdot\frac{10molH_2O}{14molO_2}=0.34molH_2O[/tex]Convert the amount of moles to grams using its molecular mass:
[tex]0.34molesH_2O\cdot\frac{18gH_2O}{molH_2O}=6.12gH_2O[/tex]To find the percent yield, divide the actual amount of water produced by the theoretical amount of water produced and multiply by 100:
[tex]\%y=\frac{0.99gH_2O}{6.12gH_2O}\cdot100=16.2\%[/tex]The percent yield is 16.2%.
List or draw three things that come to mind when you think about outer space.
Using the Mole: Empirical Formulas, Molecular Formulas, % Composition 2. Find the empirical formulas for the following compounds: a. e. 46.2% Mg, 7.69% H, 46.2% O
ANSWER
the empirical formula is MgH8O3
EXPLANATION
Given that;
The % composition of Mg is 46.2%
The % composition of H is 7.69%
The % composition composition of O is 46.2%
Assume the mass of the sample is 100g
To find the empirical formula, follow the steps below
Step 1; Find the mass of the elements
For Magnesium
[tex]\begin{gathered} \text{ Mg }=\text{ }\frac{46.2}{100}\times100 \\ \text{ mass of Mg }=\text{ 46.2 g} \end{gathered}[/tex]For hydrogen
[tex]\begin{gathered} \text{ mass of H }=\text{ }\frac{7.69}{100}\times\text{ 100} \\ \text{ mass of H }=7.69\text{ grams} \end{gathered}[/tex]For oxygen
[tex]\begin{gathered} \text{ Mass of O}=\text{ }\frac{46.2}{100}\times100 \\ \text{ Mass of O }=\text{ 46.2 grams} \end{gathered}[/tex]Step 2; Find the molar mass of the elements
The molar mass of oxygen is 15.999 g/mol
The molar mass of hydrogen is 1.00 g/mol
The molar mass of magnesium is 21.904.305 g/mol
Find the mole of the element
[tex]\text{ mole }=\text{ }\frac{\text{ mass}}{\text{ molar mass}}[/tex]For Mg
[tex]\begin{gathered} \text{ mole }=\text{ }\frac{46.2}{24.305} \\ \text{ mole }=1.900\text{ mole} \end{gathered}[/tex]For Hydrogen
[tex]\begin{gathered} \text{ mole }=\frac{7.69}{1} \\ \text{ mole }=\text{ 7.69 mol} \end{gathered}[/tex]For Oxygen
[tex]\begin{gathered} \text{ Mole}=\text{ }\frac{46.2}{15.999} \\ \text{ mole}=\text{ 2.889 mol} \end{gathered}[/tex]Step 3; find the mole ratio
In the above calculations, Mg has the least number of moles. Therefore to find the mole ratio divide the moles by the smallest moles
[tex]\begin{gathered} \text{ For mg} \\ \text{ mole ratio}=\frac{1.900}{1.999} \\ mole\text{ ration }=\text{ 1} \\ \\ \text{ For H} \\ Mole\text{ ratio }=\frac{7.69}{1} \\ \text{ molenration }=\text{ 7.69} \\ \\ fOR \\ \text{ MOLE RATION }=\frac{42.6}{15.999} \\ 2.64\text{ mol} \end{gathered}[/tex]Therefore, the empirical formula is MgH8O3
What is a major element found in our bones
The major element found in our bones is calcium.
What are the essential and non-essential elements in the bones?
Animals have significant sites for storing elements in their mineralized tissues, including bone, teeth, antlers, and horns. These tissues contain the essential metals iron (Fe), zinc (Zn), manganese (Mn), and cadmium (Cd), as well as important elements including calcium (Ca), phosphorus (P), magnesium (Mg), and sulfur (S) (Cd). Numerous minerals are necessary for good animal physiology.
The main building block of bones and teeth is calcium. In addition to its function as a second messenger, calcium is critical for muscular action, blood coagulation, and membrane permeability. Calcium and phosphorus are both found in bones and teeth. Additionally, phosphorous is a component of ATP, phospholipids, nucleic acids, and other coenzymes.
Hence, calcium plays an important role in bones and also assists in the resorption of the bone.
Learn more about major elements from the given link.
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Mary put 30 mL of water into a graduated cylinder. After adding a solid object, the water level in the cylinder rose to 65 mL. What is the volume of the object
Answer:
subtract the starting water level from the end water level to find the volume of the object so 65 ml - 30 ml =35 ml or 35cm cubed
