3 years ago

Which of these is a Physical Change?

Chemistry

1 answer:

notka56 [123]3 years ago

5 0

D. Baking cookies I hope that’s right

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How many atoms are present in 0.035 moles?

RUDIKE [14]

Answer:

$2.11x10^{22}atoms$

Explanation:

Hello!

In this case, considering the Avogadro's number, which relates the number of particles and one mole, we can infer that 1 mole of any element contains 6.022x10²³ atoms as shown below:

$\frac{6.022x10^{23}atoms}{1mol}$

Thus, we compute the number of atoms in 0.035 moles as shown below:

$atoms=0.035mol*\frac{6.022x10^{23}atoms}{1mol} \\\\atoms=2.11x10^{22}atoms$

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3 years ago

Are honey jar spells real?

Agata [3.3K]

Yes, honey jar spells are real

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3 years ago

What are the characteristics shapes of s p and d orbitals

german

Answer:

Explanation:

S orbital has a spherical shape

P orbital has a dumb-bell shape

d orbital has a double dumb-bell shape

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3 years ago

Adam's dad takes the parkway to work. It takes him 45 minutes to travel from mile marker 145 where he enters the parkway to his

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3 years ago

6 How many moles are in a 321 g sample of magnesium?

Tatiana [17]

Answer:

13.4mol of Mg

Explanation:

Given parameters:

Mass of magnesium = 321g

Unknown:

Number of moles = ?

Solution:

The number of moles of a substance is given as;

Number of moles = $\frac{mass}{molar mass}$

Molar mass of Mg = 24g/mol

Insert the parameters and solve;

Number of moles = $\frac{321}{24}$ = 13.4mol of Mg

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3 years ago