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Montano1993 [528]
4 years ago
11

How many atoms are in 3Mg(OH)2

Chemistry
1 answer:
Neko [114]4 years ago
7 0

Answer:3 atoms of Mg 6 atoms of O and 6 atoms of H

Explanation:

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Reasons for taking the melting point of a solid sample
Rudik [331]

Definition of melting point:

The melting point of solid is defined as the temperature at which the solid exists in equilibrium with its liquid under an external pressure of one atmosphere.

Reason:

The melting point is an important physical property of a compound.

1) The melting point can be used to identify a substance.

2) As an indication of its purity.

5 0
4 years ago
Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).
pychu [463]

Answer:

26.110 grams of O2 produced.

Explanation:

Calculate the amount of moles in KClO3 by dividing the amount of grams given by the atomic weight of the substance.

To get the atomic weight: K = 39.098, Cl = 35.45, O = 15.999, and there are 3 molecules of Oxygen, so multiply 15.999 by three.

39.098 + 35.45 + (15.999 * 3) = 122.548.

66.7g / 122.548 atomic mass = 0.544 moles.

The ratio of moles of KClO3 to moles of O2 is 2 to 3.

\frac{2}{3} = \frac{0.544}{y}

Cross multiply to get 1.632 = 2y. Y = 0.816, meaning 0.816 moles of O2 will be produced.

Convert this into grams by multiplying by the atomic weight of O2 (15.999 * 2 = 31.998).

0.816 * 31.998 = 26.110 grams of O2 produced.

3 0
3 years ago
A student is creating a table that compares theories, hypotheses, and laws.
Svetach [21]
It's testable
(adding random stuff right now to make the answer longer but the answer is it's testable

7 0
4 years ago
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What are some chemical properties of arsenic?
exis [7]
Chemical properties of arsenic - Health effects of arsenic - Environmental effects of arsenic

Atomic number33Atomic mass74.9216 g.mol -1Electronegativity according to Pauling2.0Density5.7 g.cm-3 at 14°CMelting point814 °C (36 atm

4 0
3 years ago
All molecules are made of similar type of atom true or false​
vichka [17]

Answer:

False

Explanation:

Not all molecules are compounds, since some molecules, such as oxygen gas (above image of molecule of-O2) or ozone (O3), consist only of one element or type of atom. Water is also a molecule because it is made from atoms that have been chemically combined.

6 0
3 years ago
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