3 years ago

Why are there only two elements in the first row of the periodic table?

Chemistry

1 answer:

Wittaler [7]3 years ago

7 0

Look in the internet

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It's #9 Pls help will give 100 points and brainiest

Vinil7 [7]

heating is repeated to ensure all water molecules have evaporated

7 0

2 years ago

Name seven characteristics that can be used to define a mineral

PIT_PIT [208]

Solid
, Inorganic,
Naturally Orcurring,
Defintite
Chemical Compostion,
Definite Crystalline Structure

5 Physical Properties

Hardness,
Color,
Crystal Shape,
Streak

7 0

3 years ago

How many molecules make up 8.41 moles of Ca2(SO3)?

sammy [17]

Answer:

<h3>5.06282 × 10²⁴ molecules</h3>

Explanation:

The number of molecules of Ca2(SO3) can be found by using the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 8.41 × 6.02 × 10²³

We have the final answer as

<h3>5.06282 × 10²⁴ molecules</h3>

Hope this helps you

3 0

3 years ago

Which skier will have a greater potential energy? Justify your answer.

pochemuha

Answer: Skier 1 will have more potential energy because he is higher than skier 2

Explanation: Gravitational potential energy is the energy possessed by a body by virtue of its position or height.

P.E= $m\times g\times h$

m= mass of the body

g= acceleration due to gravity

h= height of body

Thus if the masses of two bodies are same, the one with greater height possess greater potential energy.

6 0

4 years ago

1. The immediate surroundings of an individual

aalyn [17]

Answer:

1,b

2,c

3,d

4,g

7,e

Explanation:

1,environment

2,community

3,ecosystem

4,organism

5,amniotic

6,biotic

7,population

3 0

3 years ago