Question

Вещество количеством 2моль имеет массу 99г чему ровна масса этого вещества количеством 3,4 моль

Answer 1

N (кол-во вещества)=m/M, где
M- молярная масса вещества.
m-масса вещества
n=2 моль, m=99г
M=m/n=99/2=49,5 г/моль
n=3,4 моль, m=?
m=n×M
m=3,4×49,5=168,3 г

Answer 2

To find the mass of the substance for 3.4 moles, we can use the concept of molar mass. Molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol). First, we need to find the molar mass of the substance using the given information.

Given:

• Substance amount: 2 moles
• Substance mass: 99 grams

Step 1: Calculate the molar mass (M) of the substance using the formula:

Molar mass (M) = Mass / Amount

Molar mass (M) = 99 g / 2 mol Molar mass (M) = 49.5 g/mol

Now that we know the molar mass of the substance is 49.5 g/mol, we can find the mass for 3.4 moles of the substance.

Given:

• New substance amount: 3.4 moles

Step 2: Calculate the mass (m) of the substance for 3.4 moles using the molar mass:

Mass (m) = Molar mass (M) * Amount

Mass (m) = 49.5 g/mol * 3.4 mol Mass (m) = 168.3 g

Therefore, the mass of the substance for 3.4 moles is 168.3 grams.