Answer:
Noble gases are a set of elements in the periodic table because they don't naturally bond with other elements. *Examples ...Helium; Neon; Radon; Xenon; Argon etc
Explanation:
theyre noble gases.
Answer:
C.106 ml
Explanation:
Boyle's Law P₁V₁ = P₂V₂ , but we need to make sure our pressure is in the same units, in this case we will convert torr to atm
811 torr * (1atm/760torr) = 1.067105263 atm
P₁V₁ = P₂V₂
(1.067105263 atm)(11.1 mL) = (0.112 atm)(V₂)
V₂ = 11.84486842/0.112
V₂ = 105.7577538 mL = 106 mL
Use the percent as mass in g
Mass g) --> g/mol
K, B and H molar mass from periodic table
54.93 g K x (1 mol K/ 39.10 g K) = 1.405 mol K
38.73 g B x (1 mol B/ 10.81 g B) = 3.583 mol B
6.34 g H x (1 mol H/ 1.008 g H) = 6.290 mol H
Divide all three answers by the smallest value and you will get
1.000 mol K
2.550 mol B
4.477 mol H
now multiply these three answers by a number that will make all a whole number or (a number with a 9 as the first decimal point)
so multiply by 2
2 mol k
5 mol B
and 9 mol H
E.F. = K2B5H9
Answer is D
Sorry for bad explanation!!!!!!
Answer:
MgSo4 : 7H2O
Mr 120 : Mr 126
mass 80: x
then cross multiply
Explanation:
making x the subject of the formula then you will get 84 as the mass of water
