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Mandarinka [93]
4 years ago
15

You have a different rock with a volume of 30cm and a mass of 60g, What is its density?

Chemistry
1 answer:
Galina-37 [17]4 years ago
8 0
Density = mass/volume

Therefore,
Density = 60g/30cm
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A solution of aminoheptanoic acid, H2N-(CH2).COOH, in m-cresol at a concentration of 3.3 mol amino acid per kg of solution is po
garik1379 [7]

Explanation:

The given data is as follows.

       Concentration = 3.3 mol

      Rate constant = 2.74 \times 10^{3} kg/mol min

      Molecular weight = 55000 g/mol

      \tau = C_{A_{0}} \times \int_{0}^{X_{A}} \frac{dX_{A}}{-r_{A}}

Initial concentration (C_{A_{0}}) of aminoheptanoic is 3.3 kg/mol.

       -r_{A} = 2.74 \times 10^{3} kg/mol min

Hence, putting the given values into the above formula as follows.

    \tau = C_{A_{0}}\times \int_{0}^{X_{A}} \frac{dX_{A}}{-r_{A}}

              = \frac{3.3}{2.74 \times 10^{3} kg/mol min} [X_{A}]^{0.1}_{0}

              = 120.43 min

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3 0
3 years ago
What is the atomic mass of gold rounded to the nearest whole number
ira [324]
The answer is 197
Hope I helped
3 0
3 years ago
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How many grams of calcium are made up by 2.68 x 1023 atoms?
raketka [301]

Answer:

Mass = 17.8 g

Explanation:

Given data:

Number of atoms of Ca = 2.68 × 10²³

Mass in gram = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

2.68 × 10²³ atoms × 1 mole  /6.022 × 10²³ atoms

0.445 mol

Mass in gram;

Mass = number of moles ×  molar mass

Mass = 0.445 mol  ×  40 g/mol

Mass = 17.8 g

5 0
3 years ago
What is true about a solution of 1.0 M HF?
DanielleElmas [232]
Hydrofluoric acid is not a strong acid despite being a hydrohaulic acid (hydrogen and a halogen). HF is highly corrosive and can be used to dissolve most oxides
7 0
4 years ago
Any one help me on this one
Vlad [161]

Answer:

no

Explanation:

6 0
3 years ago
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