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crimeas [40]
4 years ago
15

Which statement about the elements in the periodic table is true?

Chemistry
1 answer:
Mariulka [41]4 years ago
5 0

where are the statements?

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A certain sample of a liquid has a mass of 42 grams and a volume of 35 centimeters3. What is the density of the liquid? The dens
Xelga [282]

Density of liquid= \frac{mass of liquid}{volume of liquid}.

so, density of liquid= \frac{42 gm}{35 cm^{3} }= 1.2 gm/cm³.

8 0
3 years ago
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How many possible Mole Ratios are in the following reaction:<br> ZnO + 2 HCl --&gt; ZnCl2 + H2O
Misha Larkins [42]

Answer: 2 moles

Explanation:

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3 years ago
A cell with normal tonicity is placed in a 200 mm nacl solution. This solution is ________ and the cell will ________.
const2013 [10]

The concentration of a cell is generally 0.15 M  (0.9 % NaCl)

As given the solution has concentration = 200mm = 0.02 M

This concentration of solution is less than the concentration of cell

Hence solution is hypotonic (less concentration) and cell will be hypertonic

7 0
4 years ago
A 0.600 g sample of a compound of arsenic and oxygen was found to
ss7ja [257]

Answer:

The answer is <u>C. As2O3</u>

Explanation:

0.600 gr of Arsenic and Oxygen.

0.454 gr of Arsenic

So, 0.146 gr of Oxygen will be in the compound.

- First: The grams of each element must be divided by its atomic weight:

  • 0.454 gr As / 74.92u As = 0.00606
  • 0.146 gr O / 16u O = 0.009125

- Both results must be divided by the lowest number found:

  • 0.00606 / 0.00606 = 1 As
  • 0.009125 / 0.00606 = 1.5 O

- As one of the values ​​is not an integer then both results are multiplied until both give an integer:

  • 1 As * 2 = 2 As
  • 1.5 O * 2 = 3 O

- Then the answer is given:

  • <u>As2O3</u>

5 0
3 years ago
How many oxygen atoms are in 10 formula units of AI2(SO4)3
Alisiya [41]

<em>Answer:</em>

  • 120 Oxygen atoms

<em>Data given</em>

  • Formula unit of AL2(SO4)3 =10
  • 1 formula unit of AL2(SO4)3  contain oxygen atoms = 12
  • 10 formula unit of AL2(SO4)3  contain oxygen atoms = 12 × 10
  • 1 formula unit of AL2(SO4)3  contain oxygen atoms = 120
3 0
4 years ago
Read 2 more answers
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