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blsea [12.9K]
4 years ago
5

Which equation represents the combined gas law?

Chemistry
2 answers:
Pie4 years ago
8 0

Answer:

\frac{P_1*V_1}{T_1}=\frac{P_2*V_2}{T_2}

Explanation:

The combined gas law is the combination of three different laws applied to gases:

Gay-Lussac's Law:

\frac{P_1}{T_1}=\frac{P_2}{T_2}

Boyle-Mariotte's Law:

P_1*V_1=P_2*V_2}

Charles's Law:

\frac{V_1}{T_1}=\frac{V_2}{T_2}

The result of the combination is:

\frac{P_1*V_1}{T_1}=\frac{P_2*V_2}{T_2}

mamaluj [8]4 years ago
4 0
<span>((P1V1/T1)=(P2V2/T2))</span>
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What is the name of the uppermost layer of the atmosphere? Why does it feel cold there, even though the temperature can be very
Aleonysh [2.5K]
That would be the exosphere. The reason it feels cold, despite high temperatures, is due to lower air density.
Hope it helps!
5 0
4 years ago
Which statement best describes a physical change? Changes can occur to certain chemical properties of the substance, but the ove
icang [17]
<h3>Changes can occur to the physical properties of a substance, but the chemical composition of the substance remains the same.</h3>

Explanation:

A physical change can not change the chemical makeup of a substance. If it did, it would be considered a chemical change. It can, however, be physically changed.

3 0
3 years ago
Describe what would be observed if a strip of magnesium ribbon was added to dilute hydrochloric acid.
nirvana33 [79]

Answer:

A solid (s) magnesium strip or ribbon is added to hydrochloric acid, an aqueous solution (aq) . The reaction produces aqueous magnesium chloride and gaseous (g) hydrogen gas, which as you can see bubbles out of solution.

8 0
3 years ago
Hydrazine, , emits a large quantity of energy when it reacts with oxygen, which has led to hydrazine used as a fuel for rockets:
Tcecarenko [31]

Answer:

1.25~mol~H_2O and 0.627~mol~N_2

Explanation:

Our goal for this question is the calculation of the number of moles of the molecules produced by the reaction of hydrazine (N_2H_4) and <u>oxygen</u> (O_2). So, we can start with the <u>reaction</u> between these compounds:

N_2H_4~+~O_2~->~N_2~+~H_2O

Now we can <u>balance the reaction</u>:

N_2H_4~+~O_2~->~N_2~+~2H_2O

In the problem, we have the values for both reagents. Therefore we have to <u>calculate the limiting reagent</u>. Our first step, is to calculate the moles of each compound using the <u>molar masses values</u> (32.04 g/mol for N_2H_4 and 31.99 g/mol for O_2):

20.1~g~N_2H_4\frac{1~mol~N_2H_4}{32.04~g~N_2H_4}=0.627~mol~N_2H_4

20.1~g~O_2\frac{1~mol~O_2}{31.99~g~O_2}=0.628~mol~O_2

In the balanced reaction we have 1 mol for each reagent (the numbers in front of O_2 and N_2H_4 are 1). Therefore the <u>smallest value would be the limiting reagent</u>, in this case, the limiting reagent is N_2H_4.

With this in mind, we can calculate the number of moles for each product. In the case of N_2 we have a <u>1:1 molar ratio</u> (1 mol of N_2 is produced by 1 mol of N_2H_4), so:

0.627~mol~N_2H_4\frac{1~mol~N_2}{1~mol~N_2H_4}=~0.627~mol~N_2

We can follow the same logic for the other compound. In the case of H_2O we have a <u>1:2 molar ratio</u> (2 mol of H_2O is produced by 1 mol of N_2H_4), so:

0.627~mol~N_2H_4\frac{2~mol~H_2O}{1~mol~N_2H_4}=~1.25~mol~H_2O

I hope it helps!

4 0
4 years ago
Helium has the lowest boiling point of any substance, at 4.2 k. part a what is this temperature in âc?
Annette [7]
Answer is: temperature of helium is -296,95°C.
The temperature T<span> in degrees Celsius (°C) is equal to the temperature </span>T in Kelvin (K) minus 273,15: T(°C) = T(K) - 273.15.
T(He) = 4,2 K.
T(He) = 4,2 K - 273,15.
T(He) = -268,95°C.
The Celsius scale was based on 0°C for the freezing point of water and 100°C for the boiling point of water at 1 atm<span> pressure.</span>
6 0
3 years ago
Read 2 more answers
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