2 years ago

The direct transfer of heat from one substance to another substance that it is touching is called

Chemistry

2 answers:

Oksanka [162]2 years ago

6 0

Thermal energy is the direct transfer of heat from one substance to another

Allushta [10]2 years ago

5 0

The correct answer is conduction because you are conducting the heat through something like a finger etc.

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How many bromine atoms are present in 39.0 g of ch2br2?

Mandarinka [93]

Answer is: there is 2,69·10²³ atoms of bromine.
m(CH₂Br₂) = 39,0 g.
n(CH₂Br₂) = m(CH₂Br₂) ÷ M(CH₂Br₂).
n(CH₂Br₂) = 39 g ÷ 173,83 g/mol.
n(CH₂Br₂) = 0,224 mol.
In one molecule of CH₂Br₂, there is two bromine atoms, so:
n(CH₂Br₂) : n(Br) = 1 : 2.
n(Br) = 0,448 mol.
N(Br) = n(Br) · Na.
N(Br) = 0,448 mol · 6,022·10²³ 1/mol.
n(Br) = 2,69·10²³.

7 0

2 years ago

Pls help!!<br>plz answer correctly!<br>will give the brainliest!<br>Urgent!!

blagie [28]

A: Copper

B: CuO

C: $\mathrm{CuSO_4}$