Answer:
14.3 Litres
Explanation:
Standard temperature and pressure denotes that a gas has the following:
P = 1 atm
T = 273K
According to this question, the mass of CO2 is 28g.
Using mole = mass/molar mass
Molar mass of CO2 = 12 + 16(2)
= 12 + 32
= 44g/mol
Mole = 28/44
= 0.64mol
To calculate the volume of CO2 at STP, we use the general gas law equation as follows:
PV = nRT
R = Gas law constant = 0.0821 Latm/molK
V = nRT/P
V = 0.64 × 0.0821 × 273/ 1
V = 14.3/1
V = 14.3 Litres
Answer:
8613.5 g
Explanation:
The formula for the calculation of moles is shown below:
For
Mass of
= 300 g
Molar mass of
= 2.016 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the given reaction:
4 moles of
will react 1 mole of
1 mole of
will react 1/4 mole of
148.81 moles of
will react 148.81/4 mole of
<u>Moles of
required = 37.2025 mol</u>
Molar mass of
= 231.53 g/mol
<u>Mass of
= Moles × Molar mass = 37.2025 × 231.53 g = 8613.5 g
</u>
The main formula is
% = molar mass of elements / total molecular molar mass) x100
<span>M (Ca(C2H3O2)2) = 2*(12*2 +3*1+16*2) + 40=158
so
</span>%Ca= 40/158<span>x 100=0.25</span><span>x 100= 25%
</span>
%C= 12/158 x 100= 0.07x 100=7%
%H= 1/158x 100=0.006x 100=0.6%
%O=16/158x 100= 0.101x 100= 10.12%
Answer : The correct statement is:
The density of each piece is the same as that of the original block.
Explanation :
Intensive property : It is defined as a property of substance which does not change as the amount of substance changes.
Examples: Temperature, refractive index, density, hardness, etc.
According to question, if Ana has a block made of pure gold and she cuts this block into two equal pieces then the density of each piece is the same as that of the original block because density is an intensive property that does not changes until and unless material is changed.
That means density remains same as that of the original piece.
Hence, the correct statement is the density of each piece is the same as that of the original block.