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4 years ago

15

PLEASE HELP!!!

1 answer:

algol [13]4 years ago

8 0

Question 1 answer: A

Question 2 answer: H

Question 3 answer: J

Question 4 answer: T

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How many atoms of each element are represented in Sn(CO3)2

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Sn=2
C and O=6
Im pretty confident yet I forgot a bit.

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3 years ago

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The molar madd of Ca(OH)2

Nonamiya [84]

What you have to do is find a periodic table and add the mass of each atom that the compound is made of.

Ca= 40.1
O= 16.0
H= 1.01

keep in mind that you have to also account for how many atoms of each there are in the molecule. for example, in Ca(OH)2, there are one Ca, two O and two H

so the molar mass of Ca(OH)2= 40.1 + (2 x 16.0) + (2 x 1.01)= 74.12 g/mol

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3 years ago

The atmospheric pressure on the surface of Venus is 6.84X10^4. Calculate the atmospheric pressure in atm and torr. Round each of

quester [9]

Answer:

0.675 atm

513 Torr

Explanation:

Given is that, the atmospheric pressure on the surface of Venus is

6.84 X 10⁴ Pa.

1 atm (atmospheric pressure) is equal to 101325 pascal (Pa).

To convert divide the pressure value by 101325.

Pressure in atm = $\frac{6.84 \times 10^{4} }{101325}$

= 0.675055 atm

Rounding it off to 3 significant digits: 0.675 atm

Now, one Torr is 133.322 Pa. For conversion, divide the pressure value by 133.322.

Pressure in Torr = $\frac{6.84 \times 10^{4} }{133.322}$

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Rounding it off to 3 significant digits: 513 Torr

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3 years ago

A neutral group of atoms joined together by covalent bonds

katrin [286]

A MOLECULE
A molecule is a true representative of a covalent bond.

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3 years ago

Please help with the question above!

Sergio [31]

Answer:

B

Explanation:

B

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