Answers
Answer:
Abiotic and Biotic factors?
Related Questions
What is the value for AG at 500 Kif AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
Answers
Answer: -18
Explanation:
Facts
What is the value for ΔG at 500 K if ΔH= 27 kJ/mol and ΔS = 0.09 kJ/(mol⋅K)?
Explanation: ΔG= -18 kJ/mol
Convert 4.6 atm to mmHg.
Answers
3496 you can google this you know
An example of a double replacement chemical reaction takes place in batteries. In an alkaline battery, Manganese oxide reacts with water to form a different manganese oxide and hydroxide. Which is the correct balanced equation for this?
Answers
Answer:
2MnO2 + H2O => Mn2O3 + 2OH is the correct balanced equation.
When manganese oxide reacts with water to form a different manganese oxide and hydroxide, the correct balanced equation for this is 2MnO₂ + H₂O ⇾ Mn₂O₃ + 2OH.
What do you mean by balanced chemical equation ?The term balance chemical equation is define as the equation which satisfy the law of conservation of mass, i.e., “Total mass of the products is equal to the total mass of all the reactants”.
If a chemical equation is not balanced, it will break the law of conservation of mass. It will indicate that either mass is created or destroyed, which is impossible.
Balanced chemical equations have the equal number and type of each atom on both sides of the equation.
Thus, When manganese oxide reacts with water to produce a different manganese oxide and hydroxide, the correct balanced equation for this reaction is 2MnO₂ + H₂O ⇾ Mn₂O₃ + 2OH.
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The enthalpies of formation of the compounds in the combustion of methane, , are CH4 (g): Hf = –74.6 kJ/mol; CO2 (g): Hf = –393.5 kJ/mol; and H2 O(g): Hf = –241.82 kJ/mol. How much heat is released by the combustion of 2 mol of methane? Use .
Answers
Answer:
The amount of energy released from the combustion of 2 moles of methae is 1,605.08 kJ/mol
Explanation:
The chemical reaction of the combustion of methane is given as follows;
CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (g)
Hence, 1 mole of methane combines with 2 moles of oxygen gas to form 1 mole of carbon dioxide and 2 moles of water vapor
Where:
CH₄ (g): Hf = -74.6 kJ/mol
CO₂ (g): Hf = -393.5 kJ/mol
H₂O (g): Hf = -241.82 kJ/mol
Therefore, the combustion of 1 mole of methane releases;
-393.5 kJ/mol × 1 + 241.82 kJ/mol × 2 + 74.6 kJ/mol = -802.54 kJ/mol
Hence the combustion of 2 moles of methae will rellease;
2 × -802.54 kJ/mol or 1,605.08 kJ/mol.
Answer: answer is C
Explanation:
Just took the test
Use the term DNA in a sentence
about proteins.
Answers
Sorry, that’s 2 sentences, but hopefully that’s helps you out.
The organic materials which are present in all organisms in the form of DNA or RNA are called nucleic acids. It is the basic genetic material of our body.
What is DNA?The group of molecules which are responsible for carrying and transmitting the hereditary characters or the genetic information from parents to the offsprings is known as Deoxy-ribonucleic acid or DNA.
The DNA is a polynucleotide molecule, the polypeptide chains are further folded in secondary, tertiary and quaternary structures to form different proteins. Every organism contains many genes in its DNA, different types of proteins can be formed.
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A compound is 2.00% H by mass, 32.7% S by mass, and 853% O by mass. What is its empirical
formula?
The final step is to use the mole ratios of the elements to write the empirical formula
The mole ratios of the elements are:
mole ratio of H:S:0 = 2:14
The mole ratios show the ratios of the elements in the compound. Use these ratios to identify the
subscripts on each element in the empirical formula Remember that the subscript 1 is not shown
What is the correct empirical formula for this compound?
HSO
H₂SO4
H2SO4
Answers
Answer:
H2SO4
Explanation:
In 100 g of the compound we hgave
2.00 g H, 32.7 g S and 65.3 g O.
2g* 1 mol/g = 2.0 mol H
32.7 g S * 1 mol/32.1 g = 1.02 mol S
65.3 g 0 * 1 mol/16 g = 4.08 mol O
2.0 mol H : 1.02 mol S : 4.08 mol O = 2 mol H : 1 mol S : 4 mol O
H2SO4
Answer:
H2SO4
Explanation:
Does anyone know how to solve this
Answers
Answer:
Beta
Explanation:
Beta has signal 0 above and -1 under
A chemistry student mixes 25 milliliters of 3.0 M hydrochloric acid (HCl) with excess sodium hydroxide. The chemicals react according to this chemical equation:
HCl + NaOH → NaCl + H2O.
If the volume of the resulting solution is 68 milliliters, what is the concentration of sodium chloride?
Answers
Answer:
1.1 mol/liter
Explanation:
You would use the M1V1 = M2V2 equation to solve this.
We know M1 is 3.0 M, V1 is 25 milliliters, and V2 is 68 milliliters. We need to find M2.
To find M2, first plug in what you know.
(3.0 M)(25 mL) = M2(68 mL)
Then, divide everything by 68 mL to get M2 by itself
Your answer should be a quite large decimal but I rounded it to 1.1 mol/liter.
Answer:
The concentration of sodium chloride is 1.1 moles/liter.
Explanation:
There are 0.55 moles of carbon dioxide gas in a 15.0 L container. This container is at a temperature of 300 K. What is the pressure of the gas inside the container? Use 8.31 L*kPa/mol*K for the gas constant.
A.)760 mm Hg\
B.) 271 kPa
C.) 2 atm
D.) 91.4 kPa
Answers
Answer:
[tex]\large \boxed{\text{D.) 91 kPa}}[/tex]
Explanation:
We can use the Ideal Gas Law — pV = nRT
Data:
V = 15.0 L
n = 0.55 mol
T = 300 K
Calculation:
[tex]\begin{array}{rcl}pV & =& nRT\\p \times \text{15.0 L} & = & \text{0.55 mol} \times \text{8.31 kPa$\cdot$ L$\cdot$K$^{-1}$mol$^{-1}\times$ 300 K}\\15.0p & = & \text{1370 kPa}\\p & = & \textbf{91 kPa}\end{array}\\\text{The pressure in the container is $\large \boxed{\textbf{91 kPa}}$}[/tex]
Find [H3O+], [OH-], & pOH for a window-cleaning solution whose pH is 4.33.
Answers
Answer:
[tex][H_3O^+] = 1*10^{-4.33} \ M[/tex][tex][OH^-] = 1*10^{-9.67} \ M[/tex][tex]pOH = 9.67[/tex]Explanation:
Given;
pH of the solution = 4.33
H₃O+ is calculated as;
pH = -log[H₃O⁺]
4.33 = -log[H₃O⁺]
-4.33 = log[H₃O⁺]
10⁻⁴°³³ = [H₃O⁺]
[tex]Thus, [H_3O^+] = 1 *10^{-4.33}[/tex] M
[OH⁻] is calculated as;
[H₃O⁺] x [OH⁻] = 10⁻¹⁴
10⁻⁴°³³ x [OH⁻] = 10⁻¹⁴
[tex][OH^-] = \frac{10^{-14}}{10^{-4.33}} = 10^{-9.67}\\\\Thus, [OH^-] = 1*10^{-9.67} \ M[/tex]
pOH of the solution is calculated as;
pOH + pH = 14
pOH + 4.33 = 14
pOH = 14 - 4.33
pOH = 9.67
Thus, pOH of the solution is 9.67
Summary of the calculation:
[tex][H_3O^+] = 1*10^{-4.33} \ M[/tex][tex][OH^-] = 1*10^{-9.67} \ M[/tex][tex]pOH = 9.67[/tex]Na2O+H2O= 2NaOH how many grams of Na2O are required to produce 1.06*10^2 grams of NaOH
Answers
Answer:
77.5 grams of Na2O
Explanation:
Convert grams to mols.
1.06 x 10^2 grams x 1 mol NaOH/39.99
= 2.50 mols NaOH
Find the mole ratio of NaOH and Na2O
1:2
Convert mols NaOH to Na2O mols
2.50 mols NaOH x 1 mol Na2O/2 mols NaOH
= 1.25 mols Na2O
Convert to grams
1.25 mols Na2O x 61.98 grams Na2O/1 mol
= 77.5 grams Na2O required to produce 1.06 x 10^2 grams of NaOH
What is the % of each element in Ni3{PO4) 2 ?
Answers
Answer:
nickel 48.1063%
Phosphorus 16.9245%
Oxygen 34.9692%
The percent composition of each element like nitrogen, oxygen and phosphorous in Ni₃(PO₄)₂ are 48.03%, 34.97% and 16.93% respectively.
How do we calculate % composition?Percent composition of any element present in any compound will be calculated as:
% comosition = (Mass of element / Mass of compound)×100%
Mass of Ni₃(PO₄)₂ compound = 366.02 g/mol
Molar mass of 3 Nitrogen atoms = 3×58.6 = 175.8 g/mol
Moar mass of 2 Phosphorous atoms = 2×31 = 62 g/mol
Moar mass of 8 Oxygen atoms = 8×16 = 128 g/mol
% comosition of Nitrogen = (175.8/366.02)×100% = 48.03%
% comosition of Oxygen = (128/366.02)×100% = 34.97%
% comosition of Phosphorous = (62/366.02)×100% = 16.93%
Hence % composition of nitrogen, oxygen and phosphorous is 48.03%, 34.97% and 16.93% respectively.
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If a body was lying on their back when they died, and was moved to their front after 12 hours, where would one see the skin discoloration from pooling blood?
Answers
Answer:the parts of the body which is nearest to the ground ie thier back will show discoloration
Explanation:
If the body remains at a position for long hours, the parts of the body which is nearest to the ground can develop a skin discoloration as a result of pooling of blood in the tissues and this is called livor mortis, which tends to be permanent from 8Hours upwards.
Which statements describe gridlines on a map? Select three options. They are measured in degrees. They set up a reference system. They make straight lines on a globe. They run north to west and south to east. They divide Earth into four equal parts.
Answers
Answer:
The options that apply to the description of grid-lines of the map are;
They are measured in degrees
They set up a reference system
They divide Earth into four equal parts
FIRST OPTION , SECOND OPTION and FIFTH OPTION are correct.
Explanation:
FIRST OPTION gave the describtion that the grid-lines of the map are measure in degrees,this option is applied to the gridlines on a map because the grid are lined as a result of angular measurement which makes it to makes the unit to be measured degrees and angles.
SECOND OPTION described it as been set up by a reference system which let us know that the area that are plotted were all grid as a result of the size
FIFTH OPTION also applied to the
description of the gridlines on a map because the Earth is divided into 4 equal parts through the Prime Meridian i.e the latitudinal line and longitudinal line .
.
Answer:
They are measured in degrees.
They set up a reference system.
They divide Earth into four equal parts.
Explanation:
i took the test
Identify earths lithospheric plates
Answers
Answer:
Lithospheric plates are regions of Earth's crust and upper mantle that are fractured into plates that move across a deeper plasticine mantle. Earth's crust is fractured into 13 major and approximately 20 total lithospheric plates.
Explanation:
I hope this helps
pH of a 0.00072 M HCl solution.
Answers
Answer:
3.14
Explanation:
pH=-log(H+)
- Hope that helps! Please let me know if you need further explanation.
Please help
What causes a wave to have a higher amplitude?
Answers
Answer:
More energy
Explanation:
Wave amplitude is determined by the energy of the disturbance that causes the wave. A wave caused by a disturbance with more energy has greater amplitude.
Answer:
energy of the disturbance
Explanation:
........ btw bts paved the way I saw you was army and thought I would say that
The teacher made a 0.5M solution. How is this number read/said?
Answers
Answer:
It reads as follows: 0.5 moles of solute per liter of solution.
Explanation:
Molarity is the most frequent way of expressing the concentration of solutions in chemistry, and it indicates the number of moles of solute dissolved per liter of solution; is represented by the letter M.
Select the single best answer.
Predict the pH (> 7, < 7, or = 7) of a LiHCO3 solution.
Answers
Answer:
LiHCO3 its PH >7
Explanation:
the real ph for it is 11.3 so it makes it more than 7
and if you know it is a conjugate base coming from the weak acid H2CO3 so LiHCO3 is a base
What happens to a neutral atom when an electron leaves
Answers
I am a subatomic particle
that is positively charged what am I?
Answers
The right answer is Proton.
Additional Information:
There are three types of subatomic particles. They are:
ProtonElectronNeutronProton is a positively charged particle,Electron is negatively charged particle and Neutron is charge less.
Hope it will be helpful to you...
Compare and contrast monoprotic and polyprotic acids.
Answers
Which phrase describes a volcano that is not expected to erupt again?
quiet volcano
extinct volcano
dormant volcano
explosive volcano
Answers
Atom X contains seven protons and seven neutrons. Atom Z contains seven and eight neutrons. Which of the following statemenats correctly describes the two atoms?
A.They are isotopes
B.They are radioactive
C.They are atims of different elements.
D. They have the same mass number
Piz help!!!!
Answers
Answer:
A. They are isotopes.
Explanation:
An isotope is an element with the same number of protons but different number of neutrons resulting in a varied mass number/molecular weight.
1. After clamping a buret to a ring stand, you notice that the set-up is tippy and unstable. What should you do to stabilize the set-up?
A. Move the buret clamp to a ring stand with a larger base.
B. Hold the buret in place by hand during the titration.
C. Use a different size buret that is more stable in the set-up
D. Clamp another buret to the ring stand to balance out the set-up.
Answers
Answer:
A. Move the buret clamp to a ring stand with a larger base.
Explanation:
The ring stands are used to hold burettes, light in weight to avoid loss of stability, that is why it is necessary to change the size of the ring stand so that it can support the buret that we are going to use. It is not recommended to balance it with the hand since it would give us an inaccurate result in the titration.
In order to stabilize the set-up, one has to move the buret clamp to a ring stand with a larger base.
The ring stand or the retort stand simply means an equipment that is used in supporting other equipment and glassware such as test tubes, flasks and burettes.In this case, since the the set-up is tippy and unstable, then it's possible that the ring size doesn't fit and one will need to move the buret clamp to a ring stand that has a larger base.In conclusion, the correct option is A.
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I am at the centre of the atom and contain both neutrons and protons. What am I?
and
Complete the sentence:
Atoms have no overall
charge because...
Answers
An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral.
Answer:
Nucleus and atoms have no overall charge because each element has the same number of protons and electrons which cancel out each other.
does temperature and pressure affect the solubilty of any solute
Answers
Answer:
Yes very much so, especially gases
Explanation:
Solubility of gases decrease with increasing pressure. Be familiar with Henry's Law.
- Hope that helps! Please let me know if you need further explanation.
Answer:
Yes, it does.
In ΔDEF, the measure of ∠F=90°, FE = 16, DF = 63, and ED = 65. What ratio represents the tangent of ∠E?
Answers
Answer:
63/16
Explanation:
tanE=
adjacent
opposite
=
16
63
Answer:
63/16
Explanation:
this for delta math?
1 point
If the pressure in a cylinder is 1 atm and the volume is 0.725 liters, then
what is the pressure when the volume is decreased to .075 liters (at
constant temperature)? *
2.5 atm
5 atm
5 atm
9.7 atm
O
13.2 atm
Answers
Answer:
9.7 atm.
Explanation:
The following data were obtained from the question:
Initial pressure (P1) = 1 atm
Initial volume (V1) = 0.725 L
Final volume (V2) = 0.075 L
Final pressure (P2) =?
The final pressure can be obtained by using the Boyle's law equation since the temperature is constant. This is illustrated below:
P1V1 = P2V2
1 x 0.725 = P2 x 0.075
Divide both side by 0.075
P2 = 0.725 / 0.075
P2 = 9.7 atm.
Therefore, the new pressure is 9.7 atm.
An organism that has 2 dominant alleles is called... *
homozygous recessive
homozygous dominant
heterozygous recessive
heterozygous dominant
HELP
Answers
Answer:
Homozygous dominant
Explanation:
