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3 years ago

Which is not a property covalent bonds ?

Chemistry

1 answer:

viktelen [127]3 years ago

4 0

your answer would be a. usually liquid or gas at room temperature

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Splitting nuclei is called __________ and joining nuclei is called _________.

SCORPION-xisa [38]

The answer is B, nic fiss, nic fusi

8 0

4 years ago

Read 2 more answers

Dissolve 7, 8 grams of Mg and Al mixture with excess HCl solution. After the reaction, the mass of acid solution increased by 7,

fgiga [73]

Answer:

Mg = 2,5 g; Al = 5,3 g

Explanation:

1) Reactions

Mg + 2HCl ⟶ MgCl₂ + H₂

2Al + 6HCl ⟶ 2AlCl₃ + 3H₂

2) Mass of each metal

If there had been no reaction, the mass of the solution would have increased by 7,8 g.

The mass increased by only 7,0 g.

The missing 0,8 g must represent the mass of the hydrogen generated by the reaction.

We have two relations:

Mass of Mg + mass of Al = 7,8 g

H₂ from Mg + H₂ from Al = 0,8 g

i) Calculate the moles of H₂

$n = \text{0,8 g H}_{2} \times \dfrac{\text{1 mol H}_{2}}{\text{2,016 g H}_{2}} = \text{0.40 mol H}_{2}$

(ii) Solve the relationship

Let x = mass of Mg. Then

7,8 - x = mass of Al

Moles of Mg = x/24.30

Moles of Al = (7,8 - x)/26.98

Moles of H₂ from Mg = (1/1) × moles of Mg = 1 × (x/24,30) = 0,0412x

Moles of H₂ from Al = (3/2) × Moles of Al = 1.5(7,8 - x)/26,98 = (11,7 -1,5x)/26,98

$\begin{array}{rcl}0,0412x + \dfrac{ 11,7 - 1,5x }{26,98} &= &0,40\\\\ 1,11x + 11.7 - 1,5x &=& 10.7\\-0.39x& = &-1.0\\x &=& \text{2.5 g}\\\end{array}$

Mass of Mg = 2,5 g

Mass of Al = 7,8 g - 2,5 g = 5,3 g

The masses of the metals are Mg = 2,5 g; Al = 5,3 g

6 0

3 years ago

Calculate the number of molecules in 64.5 grams of nitrogen

Anuta_ua [19.1K]

The correct answer is D 4.29x10^24

6 0

3 years ago

A soda is made of 5% CO2 gas, 10% powdered drink mix, and 80% water.

Aleonysh [2.5K]

Answer:

Water is a solvent, and CO2 gas and the powdered drink mix are both solutes.

Explanation:

In order to successfully answer this question, we need to remember that solutions consist of solutes and solvents.

Solutes are components of solutions that are dissolved (typically ionic salts if we have a polar solvent), while solvents are fluids (usually liquids) that provide a medium for the solutes to dissolve (water is the most common polar solvent for ionic salts, for example).

As a general rule, solvent is used in great excess, that is, it makes the greatest percentage in terms of mass of a particular solution.

Applying the theory above for this problem, notice that the greatest percentage of this solution belongs to water, besides, water is a common solvent in general. Thus, it is our solvent.

Also, solution would only have one solvent and one or several solutes. This leaves the two other components, carbon dioxide and powdered drink mix, as our solutes, as they have a lower percentage than our solvent.

8 0

4 years ago

A neutron walks into a gas station to buy some snacks. He ask the cashier ,"How much"? The cashier replies,"For you? No charge."

alexandr1967 [171]

Neutrons are neutral, so they don’t have a positive or negative charge. Hence, the cashier says no charge for the neutron. It is quite funny when you think about it lol.

5 0

4 years ago