2 years ago

How many argon (ar) atoms are there in 1.5 × 102 g of argon?

1 answer:

8 0

Answer is: there is 2,25·10²⁴ argon atoms.
m(Ar) = 1,5·10² g = 150 g.
n(Ar) = m(Ar) ÷ M(Ar).
n(Ar) = 150 g ÷ 40 g/mol.
n(Ar) = 3,75 mol.
N(Ar) = n(Ar) · Na.
N(Ar) = 3,75 mol · 6·10²³ 1/mol.
N(Ar) = 2,25·10²⁴.
n - amount of substance.
Na - Avogadro number.
M - molar mass of atom.
m - mass of atom.

You might be interested in

What is the nuclear binding energy of an atom that has a mass defect of 5.0446 x 10-29 kg?

lutik1710 [3]

I think it is 4.54 x 10-12

3 0

2 years ago

Read 2 more answers

Help if you can please.

Cloud [144]

Nuclear i believe because it has nucleus in the sentence and also talk about it

6 0

2 years ago

Read 2 more answers

Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction

alexdok [17]

Answer:

see explanation

Explanation:

Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.

Ag (+1) + NO3(-1) + 2 Na(+1) + Co3 (-2)--> Ag2CO3 (s) + 2 Na (+1) + 2NO3(-1)

8 0

2 years ago

An unknown substance has a mass of 14.7 g . When the substance absorbs 1.323×102 J of heat, the temperature of the substance is

Fudgin [204]

The correct answer of the given question above would be option B. IRON 0.449. Based on the given details above about an unknown substance that has a mass of 14.7 g and the substance absorbs 1.323×102 J of heat, the temperature of the substance is raised from 25.0 ∘C to45.0 ∘C, most likely, the substance is IRON. Hope this answers the question.

7 0

3 years ago

Read 2 more answers

What is the primary buffer in the plasma?

Alecsey [184]

Answer:

Bicarbonate, the conjugate base of carbonic acid.

Explanation:

7 0

3 years ago