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Savatey [412]
4 years ago
6

a sample of a substance has a mass of 52.5g and displaces a volume of 4.2ml. what is the density of the substance

Chemistry
1 answer:
Lena [83]4 years ago
3 0

Answer:

<h2>Density = 12.5 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 52.5 g

volume = 4.2 mL

Substitute the values into the above formula and solve for the density

We have

Density =  \frac{52.5}{4.2}  \\

We have the final answer as

<h3>Density = 12.5 g/mL</h3>

Hope this helps you

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Pls help me with is question.​
Dennis_Churaev [7]

Answer:

25cm³ = 0.025L of H2So4

Molarity of H2SO4 = 1moldm-³

Recall ... 1dm-³ = 1L

So the Molarity can also be 1mol/L

Mole = Molarity x volume in L

Mole of H2SO4 = 1mol/L x 0.025L

=0.025Moles of Sulphuric acid reacted.

From the equation of reaction

1mole of H2SO4 reacts to produce 1mole of Copper sulphate crystal

Since their Mole ratio is 1:1

It means that Since 0.025mole of H2SO4 reacted.... 0.025mole of CuSO4.5H2O would be produced

Nice.. OK

So we know the moles of CuSO4.5H2O produced

We can get the Mass

Recall

From

Mole=Mass/Molar Mass

Mass = Mole x Molar Mass

Molar Mass of CuSO4.5H2O = 64 + 32 + 16x4+ 5(2+16)

Mm= 250g/mol

Mass = 0.025mol x 250g/mol

= 6.25g of CuSO4.5H2O crystals Would be PRODUCED.

5 0
3 years ago
2H2 + O2 → 2H2O
Rudiy27

Answer: 88g

Explanation:

11 moles H2  = 11 mole H2O = 5.5 moles O2 = 16*5.5 g

6 0
3 years ago
Pls help me, ill mark brainliest and give 5 stars
Maslowich

Answer:

Decomposition!

5 0
3 years ago
Read 2 more answers
Add the polynomials (7x^3-2x^2-12)+(3x^3-8x^2+10x)
laiz [17]

Answer:

10 x ^3 − 10 x ^2 + 10 x − 12

Explanation:

4 0
3 years ago
3. Which part of Thomson's plum pudding model was different from Rutherford's model?
horsena [70]

Answer:

The difference between the Thompson's plum pudding model and the Rutherford atom model is the location of the electrons (option a).

Explanation:

While Thompson compared his atom to a plum pudding, where the electrons floated freely in the pudding, Rutherford established the arrangement of the electrons in orbitals, which were found around the atomic nucleus like the planets around the sun.

Rutherford's findings also established the existence of a small, positively charged nucleus.

<em>Thompson and Rutherford models did not differentiate between the charges of electrons and protons , overall charges or overall size of the atom.</em>

8 0
3 years ago
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