Answer:
The mass of the content = 120 g
Explanation:
Given:
Mass of empty beaker = 77.25 g
Mass of 100 L water = 100 g
Mass of salt = 20 g
Total mass = 197.25 g
Computation:
According to Law of Conservation of Mass:
According to the Law of Conservation of Mass, the physical and chemical properties of the substance changes during any type of physical or chemical process, but there is no change in their total mass.
So,
The mass of the content = Total mass - Mass of empty beaker
The mass of the content = 197.25 g - 77.25 g
The mass of the content = 120 g
URGENT WHOEVER ANSWER CORRECT GETS BRAINLIEST ANSWER!!!!!! use the information in the table to calculate the ages of the meteorites. The half-life of potassium-40 is 1.3 billion years. Meteorite Initial Amount (g) Final Amount (g) 1 30 7.5 2 80 5 3 100 12.5 Use your calculations to answer the questions. How old is meteorite 1? How old is meteorite 2? How old is meteorite 3?
Answer:
1: 2.6billion
2: 5.2billion
3: 3.9billion
Explanation:
Edge 2021
Answer:
1 2.6billion
2 5.2billion
3 3.9billion
Which question can be asked to determine if a wave is electromagnetic or mechanical
Answer: The Answer is
Does it require medium to travel
Explanation:
Answer:
does it require a medium
Explanation:
trust me
Which of these pairs would form an ionic bond?
Answer:
Ionic bonds form between nonmetals and metals. So just choose the one with a nonmetal element (like Na) and a metal element (like Cl)
Answer:
A
Explanation: K and Br
5.00 moles of oxygen gas and 2.00 moles of carbon dioxide are mixed in
an evacuated jar of volume 4.00 liters and temperature of 200 K.What is
the partial pressure of carbon dioxide (R = 0.0821 L'atm/mol K) Assume no
reaction occurs between oxygen and carbon dioxide. *
A) 2.45 atm
B) 2.98 atm
C) 5.33 atm
D) 8.21 atm
If the following weights have masses of 2, 4, 6 and 8 kg,
respectively, and they are at the same temperature, which one
will transfer more heat if they are all placed in cold water to
cool down? Explain.
Unit is calorimetry
Answer:
8 kg mass
Explanation:
As we can see in the image the weight of mass 8 kgs has a large surface area as compared to the surface area of other masses. In general, it has been observed that a wide surface area has more surface particle for heat conduction. Hence, the rate of heat transfer is directly proportional to the surface area of heat conducting surface. Thus, the larger the surface area, the faster is the rate of heat conduction.
Hence, weight of mass 8Kg wil transfer heat a fast rate.
Which of these conclusions is correct about P and Q in the diagram?
P represents the land and Q represents the ocean.
P represents the ocean and Q represents the land.
P represents the land and Q represents the atmosphere.
P represents the atmosphere and Q represents the ocean.
Answer:
P represents the atmosphere and Q represents the ocean.
Explanation:
A 0.223 mole sample of gas is held at 33.0 C and 2.00 atm, What's the volume of the gas? R = 0.0821 L atm / mol K answer soon il give brainiest.
Answer:
The volume of the gas is 2.80 L.
Explanation:
An ideal gas is a theoretical gas that is considered to be made up of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The Pressure (P) of a gas on the walls of the container that contains it, the Volume (V) it occupies, the Temperature (T) at which it is located and the amount of substance it contains (number of moles, n) are related from the equation known as Equation of State of Ideal Gases:
P*V = n*R*T
where R is the constant of ideal gases.
In this case:
P= 2 atmV= ?n=0.223 molesR= 0.0821 [tex]\frac{L*atm}{mol*K}[/tex]T=33 °C= 306 °K (being O°C= 273°K)Replacing:
2 atm* V= 0.223 moles*0.0821 [tex]\frac{L*atm}{mol*K}[/tex]* 306 K
Solving:
[tex]V=\frac{0.223 moles*0.0821\frac{L*atm}{mol*K} * 306 K}{2 atm} \\[/tex]
V= 2.80 L
The volume of the gas is 2.80 L.
what is the atomic number of nickel
Answer:
28
Explanation:
5) A solution has a pH of 1.5. What is the [H+]? *
0.0316
0.0679
0.00123
0.000954
Answer:
.0316
Explanation:
The formula is...
H+ = 10^-pH
- Hope that helps! Please let me know if you need further explanation.
How many grams of H2 can be produced from the reaction of 11.50 g of sodium with an excess of water? The equation for the reaction is 2 Na + 2 H2O -> 2 NaOH + H2 Ans: 0.504 2 g H2 I would like to know how to solve this problem, the teacher gave me the answer but I am unsure how to solve it thanks!
Answer:
[tex]m_{H_2}=0.504gH_2[/tex]
Explanation:
Hello,
In this case, since the reaction is:
[tex]2 Na + 2 H_2O \rightarrow 2 NaOH + H_2[/tex]
We notice that since there is an excess of water, we can directly compute the yielded grams of hydrogen by using the following stoichiometric procedure, considering the 2:1 molar ratio between sodium and hydrogen (notice the 2 before the sodium and the 1 before the hydrogen at the chemical reaction) and that gaseous hydrogen has a molar mass of 2 g/mol:
[tex]m_{H_2}=11.50gNa*\frac{1molNa}{22.98gNa} *\frac{1molH_2}{2.02molNa} *\frac{2gH_2}{1molH_2} \\\\m_{H_2}=0.504gH_2[/tex]
Best regards.
Answer:
0.503g of H₂ are produced
Explanation:
Based on the chemical reaction:
2 Na + 2 H₂O → 2 NaOH + H₂
2 moles of Na react with 2 moles of water to produce 2 moles of NaOH and 1 mole of H₂
11.50g of Na -limiting reactant, molar mass 22.99g/mol- are:
11.50g× (1mol / 22.99g) = 0.500 moles of Na.
As 2 moles of Na produce 1 mole of H₂:
0.500 moles of Na × (1 mole H₂ / 2 moles Na) = 0.250 moles of H₂
As molar mass of H₂ is 2.01g/mol:
0.250 moles of H₂ × (2.01g / 1mol) = 0.503g of H₂ are produced
and
can
The law of conservation of mass states that
neither be
nor
Answer:
The law of conservation of mass states that the quantity of the mass can neither be added to, neither can it be removed. The greater picture's mass will always be the same amount.
If 15 g of CzHo reacts with 60.0 g of Oz, how many moles of water (H2O)
will be produced? (Hint: use what you know about limiting reactant) *
2 C2H6 + 7 O2 + 4 CO2 + 6 H2O
O 1.5 mol H20
O
1.6 mol H20
O
1.0 mol H20
O
1.1 mol H20
Answer:
1.5 mol H2O
Explanation:
Limiting reactant was C2H6 - 0.5 moles
Fomula became .5C2H6 + 1.75O2 = 1CO2 + 1.5H2O
What is the volume of the Earth in comparison to the Sun? How many Earths would
we need to equal the volume of the Sun?
Answer: The total volume of the sun is 1.4 x 10 27cubic meters. About 1.3 million Earths could fit inside the sun. The mass of the sun is 1.989 x 10 30 kilograms, about 333,000 times the mass of the Earth.
Explanation: So if you divide the volume of the Sun by the volume of the Earth, you get 1,300,000.
3. The organelle that produces materials that need to be released from the cell
is the:
A. storage granule
B. microvilli
C. chloroplast
D. vacuole
4. An organelle found in plant cells, fungi, and some protists, animal cells, and
bacteria is the:
A. storage granule
B. microvilli
C. chloroplast
Dvacuole
How many moles of H2 are needed to produce 18 moles NH3 in the reaction below?
N2 + 3 H2 —> 2 NH3
Answer:
27 moles of H₂
Explanation:
Equation of reaction:
N₂ + 3H₂ → 2NH₃
From the equation of reaction,
3 moles of H₂ is required to produce 2 moles of NH₃
3 moles H₂ = 2 moles of NH₃
X moles of H₂ = 18 moles of NH₃
X = (3 * 18) / 2
X = 27 moles of H₂
27 moles of H₂ is required to produce 18 moles of NH₃
Copper and silver are two examples of atoms that will form a(n) _____.
metallic bond
ionic bond
covalent bond
none of the above
Answer:
metallic bond but not completely sure
Explanation:
A sample of water is heated from 10.0 degrees Celcius to 15.0 degrees Celcius by the addition of 125 Joules of heat. What is the mass of the water?
Answer:
125 = 5*4.186*m
m = 125 / 5*4.186 = 5.97g of water.
Explanation:
The water is increased by 5 degrees. This means that for every gram of water, it takes 5*4.186 J to increase the temperature by 5 degrees, aka 5*4.186 J/g
hope this help:)
The combustion of 0.1240 kg of propane in the presence of excess oxygen produces 0.3110 kg of carbon dioxide. What is the limiting reactant?
PLEASE I REALLY NEED HELP!!!!
Answer:
The limiting reactant is the propane gas, C₃H₈ while the percentage yield is 83.77%
Explanation:
Here we have
Propane gas with molecular formula C₃H₈, molar mass = 44.1 g/mol combining with O₂ as follows
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Therefore, 1 mole of C₃H₈ combines with 5 moles of O₂ to produce 3 moles CO₂ and 4 moles of H₂O
Mass of propane = 0.1240 kg = 124.0 g
Number of moles of propane = mass of propane/(molar mass of propane)
The number of moles of propane = 124/44.1 = 2.812 moles
The molar mass of CO₂ = 44.01 g/mol
Mass of CO₂ = 0.3110 kg = 311.0 g
Therefore, number of moles of CO₂ = mass of CO₂/(molar mass of CO₂)
The number of moles of CO₂ = 311.0 kg/ 44.01 g/mol = 7.067 moles
Therefore, since 1 mole of propane produces 3 moles of CO₂, 2.812 moles of propane will produce 3 × 2.812 moles or 8.44 moles of CO₂
Therefore;
The limiting reactant is the propane gas, C₃H₈, since the oxygen is in excess
Hence
[tex]The \ percentage \ yield = \frac{Actual \, yield}{Theoretical \, yield} \times 100 = \frac{7.067}{8.44} \times 100 = 83.77 \%[/tex]
The percentage yield = 83.77%.
5. How is a cell wall different from a cell membrane?
Reduce the following equation to
net ionic equation:
2Na+ + SO42- +Ba2+ + 2Cr → 2Na+2Cr +BaSO4
A. 2Na+ + 2Cl → 2NaCl
B. SO_2- +Ba2+ → BaSO4
C. 2Na+S02- → Na2SO4
ANSWER: B
Explanation:
Answer:
B) SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)
Explanation:
on edg... good luck!!
The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas.
C6H12O6(aq) + 6 O2(g) → 6 CO2(g) + 6 H2O(l)
Calculate the volume of dry CO2 produced at body temperature (37°C) and 0.960 atm when 24.5 g of glucose is consumed in this reaction.
Answer:
[tex]\large \boxed{\text{21.6 L}}[/tex]
Explanation:
We must do the conversions
mass of C₆H₁₂O₆ ⟶ moles of C₆H₁₂O₆ ⟶ moles of CO₂ ⟶ volume of CO₂
We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.
Mᵣ: 180.16
C₆H₁₂O₆ + 6O₂ ⟶ 6CO₂ + 6H₂O
m/g: 24.5
(a) Moles of C₆H₁₂O₆
[tex]\text{Moles of C$_{6}$H$_{12}$O}_{6} = \text{24.5 g C$_{6}$H$_{12}$O}_{6}\times \dfrac{\text{1 mol C$_{6}$H$_{12}$O}_{6}}{\text{180.16 g C$_{6}$H$_{12}$O}_{6}}\\\\= \text{0.1360 mol C$_{6}$H$_{12}$O}_{6}[/tex]
(b) Moles of CO₂
[tex]\text{Moles of CO}_{2} =\text{0.1360 mol C$_{6}$H$_{12}$O}_{6} \times \dfrac{\text{6 mol CO}_{2}}{\text{1 mol C$_{6}$H$_{12}$O}_{6}} = \text{0.8159 mol CO}_{2}[/tex]
(c) Volume of CO₂
We can use the Ideal Gas Law.
pV = nRT
Data:
p = 0.960 atm
n = 0.8159 mol
T = 37 °C
(i) Convert the temperature to kelvins
T = (37 + 273.15) K= 310.15 K
(ii) Calculate the volume
[tex]\begin{array}{rcl}pV &=& nRT\\\text{0.960 atm} \times V & = & \text{0.8159 mol} \times \text{0.082 06 L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{310.15 K}\\0.960V & = & \text{20.77 L}\\V & = & \textbf{21.6 L} \\\end{array}\\\text{The volume of carbon dioxide is $\large \boxed{\textbf{21.6 L}}$}[/tex]
Unlike an acid, an aqueous solution of a base A) causes some indicators to change color B) conducts electricity C) contains more H+ ions than OH– ions D) contains more OH– ions than H+ ions
Answer:
D) contains more OH– ions than H+ ions
Explanation:
Bases have high concentration of hydroxides (OH-) and acids have high concentration of (H+) ions
Like an acid the aqueous solution of a base should be option D) contains more OH– ions than H+ ions.
What is aqueous solution of a base?An aqueous solution refers to the solvent when it should be dissolved in the liquid water. It is considered to be the solute ions or the dissolved ions also the molecules should be surrounded by the water molecules and it should be incorporated when the network of the bond should lies within the water.
Also, the base contains high concentration of hydroxides (OH-) and acids have high concentration of (H+) ions
Hence, the option d is correct.
Learn more about acid here: https://brainly.com/question/15319322
what are the rules for calculating protons
Answer:
Find the element,
Explanation:
Finding the element will tell you how many protons there are. For example, if you are given an atom of oxygen, you can figure out the number of protons by looking it up on a periodic table, which gives you 8.
If an atom is neutral, find the number of electrons. This number will also be the number of protons.
Balance equation: _NO + _H2O = _NH3 + _O2
Answer:
4NO + 6H2O = 4NH3 + 5O2
Explanation:
Think about it this way: there are 4N's 4O's and 12H's and 10O's on both sides that's what makes it balanced
Hope this helps :)
2.03
Which landform is created by flowing water
A.cirques
B.gullies
C.horns
D.dunes
Answer:
Gully
Explanation:
HELP CHEM ASAP!!!!!!
Answer:
0.132
Explanation:
is the only part i know
Which statement describes a gas condensing into a liquid?
A.
The atoms in the molecules get heavier so they move less.
B.
The molecules break into smaller pieces that take up less space.
C.
The molecules stick together to make bigger molecules.
D.
The molecules get closer together and move more slowly.
Answer: molecules get closer
Explanation:
Condensation is the process in which molecules of a gas slow down, come together, and form a liquid. When gas molecules transfer their energy to something cooler, they slow down and their attractions cause them to bond to become a liquid
hope this helps
pls mark me brainliest
Answer:
D. The molecules get closer together and move more slowly.
How to find the valency of iron
How many times more acidic is a pH of 2 than a PH of 7?
Answer: 10 times more
Explanation:
How do astronomers know about the future collision of Andromeda and the Milky Way?
A) All galaxies will collide at some point
B) The two galaxies have collided previously
C) Astronomers have observed their movements over time
D) The Milky Way has changed course to head toward Andromeda
Answer:
Astronomers have observed their movements over time
Explanation:
Just took the test!!!
The future collision of Andromeda and milky way are known by astronomers because ; ( C ) Astronomers have observed their movements over time
Andromeda also known as messier 31 is a spiral galaxy that appears as a milky blur when viewed from the earth and it is believed to be slightly over 2.5 million years old.
Astronomers predict that based on its movement and the movement of the Milky way there is most likely going to be a collision in future between the Andromeda and milky way.
Hence we can conclude that The future collision of Andromeda and milky way are known by astronomers because Astronomers have observed their movements over time
Learn more : https://brainly.com/question/2849133
