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zmey [24]
3 years ago
7

SELECT ALL THAT APPLY

Chemistry
2 answers:
Luden [163]3 years ago
8 0
The answer is 1 and 3. The number of atoms per molecule of these three substance is not equal. So they will not contain same number of atoms. And for gas, under same condition with same number of moles will have the same volume. The g.f.w is related to the atomic mass. So they are different.
dybincka [34]3 years ago
4 0

Answer:

1 and 3

Explanation:

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It has been proposed that North America is moving west 2cm per year. How many kilometers would it move in 5,000 years?
vazorg [7]

The answer is .1 kilometers because 2 times 5,000 equals 10,000 cm.

hope this helps

7 0
3 years ago
How many total atoms are in 0.560 g of P2O5
ioda

Answer:

16.499 × 10∧ 21 atoms

Explanation:

Given data:

mass of P2O5= 0.560 g

number of atoms= ?

first of all we will calculate the molar mass of P2O5:

P = 2×31 g/mol = 62 g/mol

O = 5× 16 = 80 g/mol

molar mass of P2O5 = 142 g/mol

Noe we will find the moles of 0.560 g P2O5:

moles = mass / molar mass

moles = 0.560 g/ 142 g/mol

moles = 0.0039 mol

now we will find the atoms present in 0.0039 moles:

0.0039 × 6.02 × 10∧ 23 molecules

2.357 × 10∧ 21 molecules

P2O5 consist of 7 atoms:

2.357 × 10∧ 21  × 7 = 16.499 × 10∧ 21 atoms

7 0
3 years ago
Steps in dna replication<br>​
JulijaS [17]

Answer:

Explanation:

DNA replication occurs in several steps that involve multiple proteins called replication enzymes, as well as RNA. DNA replication is vital for cell growth, repair, and reproduction in organisms.

There are three main steps to DNA replication: initiation, elongation, and termination.

7 0
3 years ago
____Na + ____Cl2 ---&gt; ____NaCl
IrinaVladis [17]
Here is the answer of the given question

6 0
3 years ago
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A science teacher dissolved 50 grams of salt in 300 milliliters of water. he set the solution aside until all the water had evap
atroni [7]
When water evaporates, what is left behind is the salt that is dissolved. So you end up with the same amount of salt before and after. Meaning that the answer is 50 grams.
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3 years ago
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