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4 years ago

Which of the following is a solution?

Chemistry

1 answer:

Inessa05 [86]4 years ago

4 0

I think the answer would be B) Salt water because the other options wouldn't make much sense.

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An investigator is gathering evidence and picks up a shirt that is covered in blood and is not yet dry. After bagging the eviden

ratelena [41]

Answer:

She should search for DNA

Explanation:

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3 years ago

What is meant by the term compound? Provide an example

PIT_PIT [208]

Answer:

I hope it helps

Explanation:

<em>When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of its atoms. When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.Chemical Formula: Compounds are represented by their chemical formula. A chemical formula is a symbolic representation of the proportions of atoms that constitute a particular chemical compound.The chemical formula of water is H2O which shows two atoms of hydrogen and one atom of oxygen have combined to form one molecule of H2O. The chemical formula for common salt is NaCl which shows one atom of sodium and one atom of chlorine combine to form one molecule of NaCl.</em>

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4 years ago

A 38.6 kg marble slab is shown above. What is it’s density? Give you’re answer to the nearest tenth

kykrilka [37]

Answer:

Density, $d=24.68\ g/cm^3$

Explanation:

Given that,

Mass of marble slab is 38.6 kg or 38600 g

The dimensions of the slab is 23 cm × 17 cm ×4 cm

We know that the density of an object is given in terms of its mass volume as follows :

$d=\dfrac{\text{mass}}{\text{volume}}\\\\d=\dfrac{38600\ g}{1564\ cm^3}\\\\d=24.68\ g/cm^3$

So, the density of the marble slab is $24.68\ g/cm^3$

4 0

4 years ago

H2, N2, O2 molecules. . . A)must be polar. must be nonpolar. . B)can be polar or nonpolar depending on geometric . C)configurati

LenKa [72]

Answer: The correct option is A.

Explanation: The given molecules are the molecules of same element.

These molecules are considered as diatomic species.

Polar molecules are the molecules in which some polarity is present in the bond. These molecules are formed when there is some difference in the electronegativities of the elements. Example: HCl

Non-polar molecules are the molecules where no polarity is present in the bond. These molecules are formed when there is no difference in the electronegativities of the elements. Example: $H_2, O_2$

The given molecules are non-polar in nature.

Hence, these molecules must be non-polar. So, the correct option is A.

6 0

3 years ago

Read 2 more answers

An unknown rectangular substance measures 3.60cm high, 4.21cm long, and 1.17cm wide. If the mass is 21.3g what is this substance

tino4ka555 [31]

The rectangular substance measures 3.60cm high, 4.21cm long, and 1.17cm wide. If the mass is 21.3g substances density will be 1.20 centimeter cube.

<h3>What is density?</h3>

The density of any substance is the ratio of the mass of substance to the volume of the substance and the unit will be centimeter cube.

The volume of the substance will be 3.60cm high × 4.21cm long ×1.17cm wide = 17.7 milliliters.

density = mass of substance / volume of substance

Substituting the value in formula

Density = 21.3g / 17.7 milliliters.

Density = 1.20 centimeter cube.

Therefore, rectangular substance measures 3.60cm high, 4.21cm long, and 1.17cm wide. If the mass is 21.3g substances density will be 1.20 centimeter cube.

Learn more about density, here:

brainly.com/question/15164682

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4 0

2 years ago