2 years ago

The HNH bond angle in ammonia is ______. 100° 107° 109.5° 129°

1 answer:

5 0

The best answer is 107 degrees. The nitrogen atom in ammonia is surrounded by three bonding pairs and one lone pair of electrons giving a shape of a tetrahedron. The bond angle is 107 degrees which is less than the tetrahedral bond angle.

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18. Use the activity series to predict whether the following synthesis reaction will occur. Write the chemical equations for the

MAXImum [283]

<u>Answer:</u> The chemical reaction for the synthesis reaction is given below.

<u>Explanation:</u>

Synthesis reaction is defined as a chemical reaction in which two small chemical substances combine together to form a single compound. The general equation for this chemical reaction follows:

$A+B\rightarrow AB$

For the reaction of calcium and oxygen combining together to form calcium oxide, the equation follows:

$2Ca(s)+O_2(g)\rightarrow 2CaO(s)$

By Stoichiometry,

2 moles of calcium element combines together with 1 mole of oxygen gas to produce 2 moles of calcium oxide.

Hence, the chemical equation for the reaction is given above.

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2 years ago

Oxidation number of sulphur in H2SO4

DochEvi [55]

Answer

let the oxidation of sulphur is x

2(+1)+x+4(-2)=0

+2+x-8=0

+2-8+x=0

-6+x=0

x=6

Explanation:

i hope this will help you:)

8 0

2 years ago

What group is helium in? Group 8 or group 2?

Gemiola [76]

Answer:

group 8 of the periodic table

Explanation:

7 0

2 years ago

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Functions of the following ingredients in the production of dairy products.ii. Enzyme in cheese

Serjik [45]

Answer:

sugar in melk

Explanation:

cow eat sugar then make sugar :)

5 0

2 years ago

Identify the products in the following chemical reaction: Multiply chose

rewona [7]

Answer:

C. CaCO3

D. CO2

E. NaCl

. H2O

7 0

2 years ago