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olchik [2.2K]
3 years ago
11

14. Based on your previous observations, predict the impact of changing the number of moles of a gas sample on the volume of the

gas sample (if pressure and temperature are held constant). What effect would changing the number of moles of a gas sample have on the temperature of a gas sample (if pressure and volume are held constant)? Explain
Chemistry
1 answer:
irga5000 [103]3 years ago
7 0

Answer:

Number of moles of gas is directly proportional to the volume of the gas

Number of moles of the gas is directly proportional to the temperature of the gas

Explanation:

According to Avogadro's law, changing the number of moles of a gas changing the volume of the gas also since the volume of a gas is directly proportional to the number of moles of the gas.

Hence from Avogadro's law; V= kn where k is a proportionality constant, V is the volume of the gas and n is the number of moles of the gas.

Changing the number of moles will also lead to a change in the temperature of the gas, since volume is directly proportional to the number of moles of the gas and volume is also directly proportional to temperature (Charles law), it the follows that number of moles of the gas is directly proportional to its temperature.

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The molar mass of hydrogen (H2) is 2.02 g/mol. A sample contains 4.00 mol of H2. What is the mass, in grams, of this sample? 1.9
lianna [129]
I thought I could make you day so here is your Anwser.The mass of a sample containing 4.00 mol of H2 is 8.08 g. The molar mass of hydrogen (H2) is 2.02 g/mol. In other words, there are 2.02 g in 1.00 mol of H2. The question is how many grams are in 4.00 mol of H2. Let's use proportion: 2.02 g : 1.00 mol = x : 4.00 mol. x = 2.02 g * 4.00 mol : 1.00 mol. x = 8.08 mol. Thus, there are 8.08 g of the sample of 4.00 mol of H2.

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3 years ago
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Which step do you use first to calculate the number of grams of FeCl2 produced when starting with 30.3 g of Fe in this reaction?
Lisa [10]

Answer:

I dont care I want pionts

5 0
3 years ago
what is the trend for the size as you go from Be to Mg to Ca? does the atomic size increase, decrease, or remain the same? how w
lys-0071 [83]

Answer:

the size of Ca is the greatest ,then Mg is the greater on size than Be

Explanation:

if you make the  electron configuration for each of the elements, what  is the main  difference  u gonna see ?

Be 4   1s2/2s2

Mg 12 1s2 /2s2 2p6/3s2

Ca 20 1s2 /2s2 2p6/3s2 3p6 3d/4s2

see that all the elements are in the same group but are in different period

u gonna see the last electron valance shell in Ca are too far  from its nucleus but in  Be the last electrons are too close and more attracted to the atom's nucleus , so the size of Ca is the biggest then Mg then Be

4 0
4 years ago
Calculate the mass percent of carbon in the hydrated form of the solid that has the formula BeC2O4•3H2O.
jeka94

Answer:

15.89%

Explanation:

To calculate the percentage of carbon in BeC2O4•3H2O, first we calculate the molar mass of BeC2O4•3H2O

MM of BeC2O4•3H2O = 9+(12x2)+(4x16)+3(2+16) = 9+24+64+54 =151g/mol

Mass of C in BeC2O4•3H2O = 2x12 = 24g

%Mass of carbon in BeC2O4•3H2O = (24/151) x 100

= 15.89%

3 0
4 years ago
A compound is 86% carbon and 14% hydrogen by mass. What is the empirical formula for this compound?
andriy [413]
First, convert grams of the elements to moles. Then you divide by the smallest number of moles to get the lowest whole number ratio.
86g C×1 mol C/12g C = 7.2 mol C/7.2= 1
14 g H×1 mol H/1g H = 14 mol H/7.2= 2
So the empirical formula is C1H2
7 0
3 years ago
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