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Vesna [10]
3 years ago
10

Suppose you place a hot pack into a vacuum chamber and the hot pack caused the temperature to rise from 21 degrees to 23 degrees

Celsius. If the
pressure was initially 1 atmosphere, what equation would you use to determine the new pressure at the new temperature? Assume volume, and quantity of
gas are held constant.
Select one:
a. P1/T1 = P2/T2
b. P1V1 = P2V2
c. P1T1 = P2T2
d. P1n1 = P2N2
Chemistry
1 answer:
Marizza181 [45]3 years ago
7 0

Answer:

A

Explanation:

Pressure and Temperature have to be divided by each each other because they are directly related.

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Oxygen-17 and oxygen-18 _____. have the same mass are isotopes of oxygen have different numbers of protons
NNADVOKAT [17]

 oxygen -17   and  oxygen-18 are  isotopes  of  oxygen


<em><u>Explanation</u></em>

Isotope is two or more forms   of the same element  that  has  equal  amount of proton but different  number of neutrons  in the nuclei.

oxygen -17 and oxygen-18  are  isotope    of oxygen since they  have the equal amount   of  protons but different   number of  neutrons  in their  nuclei.

that  is oxygen  17  has   8  protons  and  9  neutrons  while  oxygen 18  has  8 protons and  10  neutrons.


8 0
3 years ago
How many grams of water are produced from the reaction of 40.3 g of oxygen according to this equation? 2h2(g) + o2(g) → 2h2o(g)?
Vikki [24]
The balanced equation for the above reaction is as follows;
2H₂ + O₂ --> 2H₂O
stoichiometry of  O₂ to H₂O is 1:2
number of O₂ moles reacted - 40.3 g / 32 g/mol = 1.26 mol
according to molar ratio 
number of water moles produced = 2 x number of O₂ moles reacted 
number of water moles formed - 1.26 x 2 = 2.52 mol
mass of water produced = 2.52 mol x 18 g/mol = 45.4 g
45.4 g of water produced

4 0
3 years ago
N2 + 3H2 Right arrow. 2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3? Use Percent
Romashka [77]

Answer:

53.4%

Explanation:

N₂ + 3H₂ → 2NH₃

Given that:

26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃

Then:

The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)

= 13.05 mol of H₂

The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)

= 8.697 mol of NH₃

The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃

The percent yield = actual yield/ theoretical yield * 100%

The percent yield = ( 79.0 g/ 148.1 g )* 100%

The percent yield ≅ 53.4 %

7 0
3 years ago
Read 2 more answers
What are metalloids? something on the right side of the periodic table something on the left side of the periodic table somethin
BARSIC [14]
It’s D something along the stair step on the periodic table
4 0
3 years ago
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CH4 + 202 + CO2 + 2 H2O<br><br> What is the mole ratio of methane (CH4) to carbon dioxide (CO2).
Artyom0805 [142]

Answer:

1:1.

Explanation:

From the equation we see that there is one mole of methane and one mole of carbon dioxide.

3 0
3 years ago
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