Question

there are two questions A and B. both are seperate questions. thank you

A)a typical bag used for disposing of yard waste says it holds 30.0 gallons. a utility bag is advertised as being 10.0 ft^3.

1) which has the larger volume, the paper bag or the utility bag?

2) how many times larger?

B)a metal M forms an oxide with formula M2O5. if the oxide compound contains 43.99% O by mass, what is the molar mass of the metal? ehat is the identify of the metal?

Answer 1

A)

1) We know that,

1 ft^3 = 7.481 gallons

So, 10 ft^3 = 10*7.481 = 74.81 gallons

Hence, 10 ft^3 is greater than 30 gallons.

2) ratio = 74.81/30 = 2.494

10 ft^3 is 2.494 times of 30 gallons.

B) Let X is the molar mass of M.

M2O5

% of O = 43.99

Moles of O = % of O / molar mass = 43.99/16 = 2.75 moles

% of M = 100 - 43.99 = 56.01

Moles of M = % of M/Molar mass = 56.01/X

From formula,

Mole ratio of M and O is

M : O = 2 : 5

56.01/M : 2.75  = 2 : 5

56.01 / 2.75*M = 2/5

56.01 * 5 / 2 * 2.75 = M

M = 50.93 g/mol

Hence, element is Vanadium of V ....Answer

V2O5