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Brilliant_brown [7]
3 years ago
15

BEEN STUCK ON THIS FOR THREE HOURS. GIVING 50 POINTS TO ANYONE WHO SOLVES!

Chemistry
1 answer:
Arturiano [62]3 years ago
4 0

Answer:

1:   38

2:  39

3:  40

4:  41

Explanation:

The mass in amu is the weight of the neutrons and protons in the element.  The mass number is the number neutrons and protons you have in an element.  Both neutrons and protons have a weight of 1 amu.  Since you can't have a decimal of a subatomic particle, you have to round to the nearest whole number.

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A sample of gas is held at constant pressure. Increasing the Kelvin temperature of this gas sample causes the average kinetic en
Maksim231197 [3]
Increase.
I don't even know the point of the first sentence. Average Kinetic Energy *is* temperature. The higher AVE the higher the temp. The higher the temp the faster the AVE. They're directly correlated.
5 0
4 years ago
A chemist adds 36.0 g of sodium chloride to 200 g of water at STP and all of the sodium chloride dissolves. What is the solute i
erica [24]

Answer:

The answer is the Sodium Chloride.

Explanation:

A solute is the minor component in a solution, dissolved in the solvent, and the sodium is being dissolved in water ( or the solvent).

3 0
2 years ago
How is the free energy change of a process related to the work that can be obtained from the process? Is this quantity of work o
nevsk [136]

Free energy is used to determine how systems change and how much work they can produce.

If the free energy of the reactants is greater than that of the products, the entropy  will increase when the reaction takes place  so the reaction will tend to take place spontaneously. If the free energy of the products exceeds that of the reactants, then the reaction will not take place

The Gibb's free energy change (ΔG) is:

ΔG<0⟶ Spontaneous process

ΔG>0⟶  Non-spontaneous process

ΔG=0⟶ Equilibrium process or reversible process

Gibb's free energy is a quantity used to measure the maximum amount of work done in a thermodynamic system , when the temperature and pressure are constant .

It is a state function hence it doesn't depend on path .

ΔG = ΔH - T(ΔS)

Learn more about free energy here :

brainly.com/question/10012881

#SPJ4

7 0
1 year ago
C2H4+
klasskru [66]

Answer:

A. Theoretical yield = 3.51g

B. %yield = 75%

Explanation:

The balanced equation for the reaction is given below:

C2H4 + 3O2 —> 2CO2 + 2H2O

Molar Mass of O2 = 16 x 2 = 32g/mol

Mass of O2 from the balanced equation = 3 x 32 = 96

Molar Mass of H20 = (2x1) + 16 = 18g/mol

Mass of H2O from the balanced equation = 2 x 18 = 36g

A. From the equation,

96g of O2 produced 36g of H2O

Therefore, 9.35g of O2 will produce = (9.35 x 36)/96 = 3.51g of H2O

Therefore,theoretical yield of water (H2O) = 3.51g

B. Theoretical yield = 3.51

Actual yield = 2.63g

%yield =?

%yield = Actual yield/Theoretical yield x 100

%yield = 2.63/3.51

%yield = 75%

4 0
3 years ago
Why are deposits of pure sodium metal or pure potassium metal not seen in nature
Natasha2012 [34]
<span>They are not seen in nature because they are always combined with something to make something else.</span>
5 0
3 years ago
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