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laila [671]
3 years ago
9

Which pair of ions can form an ionic bond with each other and why? A.Cu and Ag; They are both metal ions.B. S and O; They have l

ike charges.C. Br and At; They are both halogen ions. D.Li and Br; They have unlike charges.
Chemistry
2 answers:
kap26 [50]3 years ago
5 0
Opposite pairs form ionic bonds, due to this the answer is D - Li and Br; They have unlike charges.
schepotkina [342]3 years ago
3 0

Answer: Option (D) is the correct answer.

Explanation:

It is known that opposite or unlike charges attract each other and like charges repel each other.

Therefore, out of the given options only Li and Br has unlike charges. As Li has one positive charge and Br has one negative charge.

Thus, only Li and Br will attract each other as they have unlike charges.

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Nuclear power plants have the greatest environmental impact during __________. A) operation B) mining C) waste disposal D) const
lyudmila [28]
The correct option is C.
The issue of disposal of waste of nuclear power plants has been a controversial issue for long because of the hazardous effects which these wastes have on human health and the environment. Most of the waste are usually long lived radioactive wastes which can remain active for a very long time and which have detrimental effect on both the environment and the human health.<span />
5 0
3 years ago
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2a. Write down the names of the new substances formed when each of the following substance reacts with dilute hydrochloric acid.
Naddika [18.5K]

Answer:

i) Dilute hydrochloric acid will react with Ammonia to form ammonia salt.

ii) dilute hydrochloric acid will react with soduim hydroxide to form sodium chloride and water

iii) dilute hydrochloric acid will react with calcuim carbonate to form Calcium chloride, Carbon dioxide and water.

Explanation:

CHEMICAL EQUATIONS :

I) HCL + NH3 = NH4Cl

ii) HCL+ NaOH = NaCl + H2O

iii) HCL + CaCo = CaCl2 + CO2 + H2O

7 0
2 years ago
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The enthalpy of solution (∆H) of KOH is -57.6 kJ/mol. If 3.66 g KOH is dissolved in enough water to make a 150.0 mL solution, wh
Wewaii [24]

When 3.66 g of KOH (∆Hsol = -57.6 kJ/mol) is dissolved in 150.0 mL of solution, it causes a temperature change of 5.87 °C.

The enthalpy of solution of KOH is -57.6 kJ/mol. We can calculate the heat released by the solution (Qr) of 3.66 g of KOH considering that the molar mass of KOH is 56.11 g/mol.

3.66g \times \frac{1mol}{56.11g} \times \frac{(-57.6kJ)}{mol} = -3.76 kJ

According to the law of conservation of energy, the sum of the heat released by the solution of KOH (Qr) and the heat absorbed by the solution (Qa) is zero.

Qr+Qa = 0\\\\Qa = -Qr = 3.76 kJ

150.0 mL of solution with a density of 1.02 g/mL were prepared. The mass (m) of the solution is:

150.0 mL \times \frac{1.02g}{mL}  = 153 g

Given the specific heat capacity of the solution (c) is 4.184 J/g・°C, we can calculate the change in the temperature (ΔT) of the solution using the following expression.

Qa = c \times m \times \Delta T\\\\\Delta T = \frac{Qa}{c \times m} = \frac{3.76 \times 10^{3}J  }{\frac{4.184J}{g.\° C }  \times 153g} = 5.87 \° C

When 3.66 g of KOH (∆Hsol = -57.6 kJ/mol) is dissolved in 150.0 mL of solution, it causes a temperature change of 5.87 °C.

Learn more: brainly.com/question/4400908

7 0
2 years ago
What is the name of the state when electrons absorb energy and move to a higher energy level?
Sergeu [11.5K]

Answer:

Excited State

Explanation:

It's when electrons absorb energy and move to a higher level.

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3 years ago
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2 AICI3 + 3 Ca - 3 CaCl2 + 2 Al
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