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3 years ago

How do i do this its science

Chemistry

2 answers:

timama [110]3 years ago

5 0

Look at the points at x=0 where are they? They have to be 10y apart
B and d can’ be ruled out because they start at the same place
C is 20 apart and a is 10 apart so your answer is A

sp2606 [1]3 years ago

3 0

The answer is graph A. One of the lines starts at 0 on the y-axis (distance) and the other starts at 10. Which is 10 yards further than the other

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3 years ago

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erik [133]

Hello!

The statement that best proves that the law of conservation is obeyed during this process is that The total mass of oxygen and carbon is equal to the total mass of carbon dioxide.

The chemical equation for the combustion reaction of coal in the carbon cycle is the following one:

C(s) + O₂(g) → CO₂(g)

From this simple chemical equation, we can conclude that if the Law of Conservation of Matter is obeyed in this reaction, the sum of the initial masses of Carbon and Oxygen before the reaction will be equal to the total amount of Carbon Dioxide formed by it, because they sum up to produce Carbon Dioxide.

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3 years ago

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Which of the following conditions must be met for a volume ratio to be created from a balanced chemical equation?

Gnesinka [82]

Answer: Option (b) is the correct answer.

Explanation:

According to ideal gas law, the product of pressure and volume is equal to the product of number of moles, gas constant and temperature.

Mathematically, PV = nRT

So, when there are two gases with equal number of moles behaving ideally then the ideal gas equation will be as follows.

$\frac{P_{1}V_{1}}{T_{1}}$ = $\frac{P_{2}V_{2}}{T_{2}}$

and $\frac{V_{1}}{V_{2}}$ = $\frac{P_{2}T_{1}}{P_{1}T_{2}}$

Hence, when temperature and pressure of both the gases will be constant then $\frac{V_{1}}{V_{2}}$ = 1.

Thus, we can conclude that constant temperature and pressure is the conditions that must be met for a volume ratio to be created from a balanced chemical equation.

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3 years ago

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Which statement describes a reaction at 298 K if AH = 31 kJ/mol, AS = 0.093

melisa1 [442]

Answer: (D) it is not spontaneous.

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