Answer:
Sure let me take a look at it
Explanation:
Answer:
40.5% is abundance of X-122
Explanation:
we know there are two naturally occurring isotopes of X, X-120 and X-122.
First of all we will set the fraction for both isotopes
X for the isotopes having mass 122
1-x for isotopes having mass 12
0
The average atomic mass of X is 120.81 amu
we will use the following equation,
122x + 120 (1-x) = 120.81
122x + 120 - 120x = 120.81
122x- 120x = 120.81 -120
2x = 0.81
x= 0.81/2
x= 0.405
0.405 × 100 = 40.5%
40.5% is abundance of X-122 because we solve the fraction x.
now we will calculate the abundance of X-120.
(1-x)
1 - 0.405 = 0.595
0.595 × 100 = 59.5 %
59.5 % for X-120.
Answer:
The tendency for water molecules to stick together causes it to causes spheres in space. ... Magnetic-like molecules on water's surface cause the surface to behave like an elastic skin. Each molecule is pulled with equal tension by its neighbors.J
Explanation:
Group 7A, it has bromine as a liquid, chlorine and fluorine as gases, and other solids
Answer:
16.36 grams
Explanation:
From the reaction equation:
CH4 + 2O2-------------------------- CO2 + 2H2O
1 : 2 1 : 2
If 20g of CO2 was produced, then the number of moles of CO2 is given by :
Molar mass of CO2 = 12 + [2 x 16]
= 44 gram/moles
Number of moles = Mass in gram/ Molar mass
= 20/ 44
= 0.4545 moles
if 0.4545 moles of CO2 were produced, then according to the equation of reaction, then:
Number of moles of H2O produced will be = 2 x 0.4545
= 0.909moles
Molar Mass of H2O = [1 x2] + [16]
= 18 grams/ mol
The mass of H2O produced will be = Number of moles x Molar Mass
= 0.909 moles x 18 grams/mole
= 16.362 grams
≈ 16.36 grams