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ziro4ka [17]
3 years ago
11

What is the relative molecular mass (mr) of ammonia, formula NH3?

Chemistry
1 answer:
egoroff_w [7]3 years ago
7 0

Answer:

APROXIMENTLY 17

Explanation:

lol i remebered from science class

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If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the struct
Inessa05 [86]

Answer:

The correct option is: bent 109°

Explanation:

Covalent molecules are the molecules in which the atoms are linked by covalent bonds. The electrons involved in the formation of a covalent bond are known as shared pair or <u>bond pair of electrons</u>.

The three-dimensional arrangement of the atoms of a molecule in space is known its molecular structure or geometry.

<u>Given molecule</u>: XY₂, having two lone pairs around the central atom X.

Since the molecule XY₂ has <u>two lone pairs</u> and <u>two bond pairs</u> of electrons. Therefore according to the VSEPR theory, the given molecule has a <u>bent molecular geometry with 109° bond angle.</u>

7 0
3 years ago
A solution has a hydrogen ion concentration of 6.8 10–3 M. (2 points) i. What is the pH of the solution? Show your work.
vladimir2022 [97]

Answer:

2.17

Explanation:

To calculate pH using the hygrogen ion concentration we must use the following formula:

- log (H+) = pH

All we have to do now is plug in our hygrogen ion concentration and put it in our calculator.

- log (6.8 × 10⁻³) = 2.17

Don't forget proper figures for pH!

8 0
3 years ago
Which statement accurately describes the evidence that scientists gather using fossils? Check all that apply.
OLga [1]

Complete question is;

Which statements accurately describe the evidence that scientists gather using fossils? Check all that apply.

A) The fossil record can be used to date rocks.

B) Living things with many cells have always lived on Earth.

C) Simple organisms are found only in young rocks.

D) Geologists study ancient remains of plants and animals.

E) Scientists can figure out what ancient living things ate.

F) Pollen and seeds help provide clues about ancient climates.

Answer:

A) The fossil record can be used to date rocks

E) Scientists can figure out what ancient living things ate.

F) Pollen and seeds help provide clues about ancient climates

Explanation:

In scientific research, fossils are sometimes referred to as animals and plant. Now, in studying records of fossils, it will be easy to know the length of existence of living things on the Earth. Also, we can be able to identify the manner in which different relationships exists between plants and animals by predicting their lifestyles, location of their habitation e.t.c which can be used to predict the old time climates.

Looking at the options given in relation to the explanation given, options A, E & F are correct

5 0
3 years ago
Zinc chloride + Magnesium →
Gelneren [198K]

Answer:

im assuming you need the balanced equation

Explanation:

Zn + MgCl2 = ZnCl2 + Mg

3 0
3 years ago
Read 2 more answers
A BLANK can be separated by filtration
gizmo_the_mogwai [7]

A solid from the liquid it suspends can be separated by filtration.

4 0
3 years ago
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