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aleksandrvk [35]
4 years ago
5

Which of the following pairs are isotpes?

Chemistry
1 answer:
grin007 [14]4 years ago
5 0
The answer is B because isotopes have the same number of protons and neutrons.
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Write the dissociation of hydrosulfuric acid
Vesnalui [34]

Answer:

Explanation:

Hydrosulfuric acid (H_2S) is considered a 'weak acid." It dissociates in water according to this reaction: H_2 S(aq) + H_2O(t) HS^-(aq) + H_3O^+(aq) k_a = 9 times 10^-8 Hydroiodic acid (HI) is considered a "strong acid".

7 0
3 years ago
What is the total mass of three gold bars that weigh 5543 mg, 23.45 mg, and 697.4 mg?
GrogVix [38]
The total mass is the sum of the masses.
It is
5543 + 23.45 + 697.4 mg =  6263.85 mg

Answer:  6263.85 mg
6 0
3 years ago
What happens if a solid changes the state of substance to liquid?
kati45 [8]
It would had to have melted in order to change the properties from a solid into a liquid. It also depends on the type of solid wheither a chemical or a ice cube. If it was a ice cube if would dilutte the liquid solution and changes the taste ot texture (feel) if it was a chemical the properties could change the liquid into a solid only depending on th type of chemical. EX..Liquid Nitrogen and a piece of raw chiken the outcome after putting the chicken in the nitrogen would be frozen. Because the chemical Nitrogen freezes the particles which makes the chicken frozen.
4 0
3 years ago
Read 2 more answers
Usually, when the temperature is increased, what will happen to the rate of dissolving?
True [87]

Answer:

B) It will increase.

Explanation:

Solubility tends to increase with an increase in temperature

5 0
3 years ago
What is the concentration of chloride ions in a solution formed by mixing 150. mL of a 1.50 M NaCl solution with 250. mL of a 0.
joja [24]
Here, we apply a mass balance:
Moles of chloride ions in final solution = sum of moles of chloride ions in added solutions

We must also not that each mole of sodium chloride will release one mole of chloride ions, while each mole of magnesium chloride will release two moles of chloride ions.
Moles = concentration * volume
Moles in final solution = moles in NaCl solution + moles in MgCl₂ solution
C * (150 + 250) = 1.5 * 150 + 2 * 0.75 * 250
C = 1.5 M

The final concentration is 1.5 M
4 0
3 years ago
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