3 years ago

How many moles of MgCl2 are there in 329 g of the compound? Your Answer:

Physics

2 answers:

Nookie1986 [14]3 years ago

6 0

Answer:3.46

Explanation:

mass=329

molar mass=71

no. of moles=329/71

=3.46

Debora [2.8K]3 years ago

5 0

Answer:3.46

Explanation:

mass=329

molar mass=71

no. of moles=329/71

=3.46

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Lana71 [14]

1. - 12N

2.- 2 hours

3. - 0.5 m/s/s

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3 years ago

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A 1,200 kg car travels at 20 m/s. what is it’s momentum ?

WINSTONCH [101]

Answer:c vx v xv xv x

Explanation:

mlmcmcm

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3 years ago

1/012=1/0.05+1/d' hiiiiiiiiii

klasskru [66]

Correct question is;

1/0.12 = (1/0.05) + (1/d')

Answer:

d' = -1/700

Explanation:

1/0.12 = (1/0.05) + (1/d')

Let's rearrange to get;

(1/d') = (1/0.12) - (1/0.05)

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Let's multiply through by 60 to get rid of the denominators on the right side;

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> (1/d') = -700

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8 0

2 years ago

A cube-shaped piece of copper has sides of 4cm each and it's density is

iris [78.8K]

Answer:

$64 cm^3$

Explanation:

<u>Density </u>

The density of a substance is the mass per unit volume. The density varies with temperature and pressure.

The formula to calculate the density of a substance of mass (m) and volume (V) is:

$\displaystyle \rho=\frac{m}{V}$

We have a cube-shaped piece of copper of 4 cm of side length. The volume of the piece is:

$V=(4\ cm)^3=64\ cm^3$

Surprisingly, no other magnitude is required, thus the answer is:

$\mathbf{64 cm^3}$

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2 years ago

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so x = - 28 m</span>

8 0

3 years ago