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QveST [7]
4 years ago
8

Select the correct answer. What is a substance? A) a uniform mixture that can’t be separated B) a mixture that can be separated

C)a single component that can’t be separated D)a single component that can be separated
Chemistry
2 answers:
Anuta_ua [19.1K]4 years ago
7 0

Answer:

The correct answer is <u><em>A) a uniform mixture that can’t be separated.</em></u>

Explanation:

All matter whose properties and characteristics are stable and homogeneous is known as the substance. In other words, substance is any matter or material whose chemical characteristics and internal composition are constant, that is, its compounds never vary, remain in time.

Chemical substances are composed of atoms, formular units and molecules. It cannot be separated into components without breaking chemical bonds.

The substances can be presented in the liquid, solid, gaseous or plasma form and each one can be differentiated according to its temperature and pressure.

Then, <u><em>the correct answer is A) a uniform mixture that can’t be separated.</em></u>

Anastaziya [24]4 years ago
5 0
A uniform mixture that can't be separated
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Does this make a reaction? Because both products are soluble.
Crank

Answer:

Yes.

Explanation:

It will react. Because they are compounds

3 0
3 years ago
What is the volume of HCl gas required to react with excess magnesium metal to produce 6.82 L of hydrogen gas at 2.19 atm and 35
prohojiy [21]

Answer:

Explanation:

2 HCl(g) + Mg(s) → MgCl₂(s) + H₂(g)

Let's calculate the quantity of mole of produced hydrogen with the Ideal Gases Law

P . V = n . R .T

2.19 atm . 6.82L = n . 0.082 . 308K

(2.19 atm . 6.82L) / (0.082 . 308K) = n

0.591 mol = n

1 mol of H₂ gas came from 2 mol of hydrochloric, so, 0.591 mol came from the double of mole

0.591 .2 = 1.182 mole of acid.

Molar mass of HCl = 36.45 g/m

1.182 mole are (36.45 g/m . 1.182g ) contained in 43.1 g

Density HCl = HCl mass / HCl volume

0,118 g/mL = 43.1 g / HCl volume

43.1 g / 0.118 g/mL = 365.3 mL (HCl volume)

5 0
3 years ago
1. Round each of the following numbers to four significant figures, and express the result in scientific notation:
vfiekz [6]

The rounding up of the aforementioned number to four significant figures is as follows: 3.002 × 10²

<h3>What are significant figures?</h3>

Significant figures are figures that contribute to the general and overall value of the whole number.

Significant figures or digits are specifically meaningful with respect to the precision of a measurement.

Although, the original number given in this question has 9 significant figures, the number; 300.235800 can be rounded up to four significant figures as follows:

  • Decimal notation: 300.2
  • No. of significant figures: 4
  • No. of decimals: 1
  • Scientific notation: 3.002 × 10²

Therefore, the rounding up of the aforementioned number to four significant figures is as follows: 3.002 × 10².

Learn more about significant figures at: brainly.com/question/14359464

#SPJ1

3 0
2 years ago
An INPUT of photosynthesis is ______________<br> A.Oxygen<br> B.Roots<br> C.Sunlight
AfilCa [17]

The inputs of photosynthesis are light energy, and matter in the form of water absorbed through the roots, and carbon dioxide absorbed through the leaves.

Therefore an input of photosynthesis from the choices given is,

Sunlight

3 0
3 years ago
Read 2 more answers
Please help me ಥ_ಥ
dexar [7]

Energy is stored in chemical bonds during photosynthesis.

During photosynthesis, the radiant energy from the sun is converted to chemical energy in carbohydrates.

Inorganic materials in the form of carbon dioxide and oxygen combine to form carbohydrates in the presence of radiant energy according to the equation below:

6CO_2 + 6H_2O ---> C_6H_1_2O_6 + 6O_2

The energy is thus, stored in chemical bonds in the carbohydrate and this is what is oxidized during respiration to release the locked energy.

More on photosynthesis can be found here: brainly.com/question/1388366

7 0
3 years ago
Read 2 more answers
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