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Romashka [77]
2 years ago
14

How do you solve for x?​

Chemistry
1 answer:
Ad libitum [116K]2 years ago
3 0

Answer:

substitution is the best method or collecting like terms

Explanation:

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What is a valency according to chemistry<br>​
Bond [772]

Answer:

Valency is the measure of the combining power of an element

4 0
2 years ago
You are given 24.3 grams of Mg and combine it with 32.1 grams of Sulfur, what is the mass of MgS? *
koban [17]

Answer:

ExplanatioFirst let us compute for the molar mass of Mg(OH)2.

molar mass = 24.3 + 2 (16) + 2(1.0)

molar mass = 58.3 g/mol

 

So the mass is then:

mass = 3.2 mol * (58.3 g/mol)

mass = 186.56 gramsn:

5 0
2 years ago
How to first ionization energies vary within groups and across periods
trapecia [35]

Answer:

Ionisation energy increases along a period but decreases down a group

Explanation:

As you go along the period, the amount of protons in the nuclear increases. This causes nuclear attraction to increase meaning the attraction between the protons and the electrons is higher. This causes the electrons to be held more tightly to the nucleus meaning they are harder to remove. As well as that, the shielding stays the same along a period since the electrons are being added to the same shell, just different orbitals. Overall this makes it harder to remove an electron as you go along a period causing the ionisation energy to increase along a period.

On the other hand when you go down a group, the atomic radius increases. This is because the electrons are added to new shells which are further away from the nucleus, this also causes shielding to increase as there are more shells. This means the outer electrons being removed are held less tightly by the protons in the nucleus meaning they are easier to remove. This means that the ionisation energy decrease down a group.

8 0
3 years ago
How many grams of sodium carbonate, Na2CO3, are needed to add to 0.125 kg of water to make a 0.200 m (molal) solution
lara31 [8.8K]

Answer:

Mass = 2.65 g

Explanation:

Given data:

Mass of sodium carbonate = ?

Mass of water = 0.125 g

Molality = 0.200 m

Solution:

Formula:

Molality = number of moles of solute / mass of solvent in Kg

by putting values,

0.200 m = Number of moles of solute / 0.125 kg

Number of moles = 0.200 m × 0.125 kg

Number of moles = 0.025 mol

Mass of sodium carbonate:

Mass = number of moles × molar mass

Mass = 0.025 mol × 106 g/mol

Mass = 2.65 g

4 0
2 years ago
Please tell me what orders they go in
nikdorinn [45]

Answer:

B, C, A

Mechanical energy is b, then c, a

7 0
2 years ago
Read 2 more answers
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