All categories

3 years ago

1. Which of the following indicates the number of protons?

Chemistry

2 answers:

Mars2501 [29]3 years ago

7 0

The correct answer is A

Leokris [45]3 years ago

6 0

Answer:

a)Atomic number

Explanation:

Element symbol signifies the element. For eg, Na is sodium. Mass number is the sum of protons and neutrons of an atom of an element. Atomic mass is the molar mass of the given element. Finally, atomic number is unique to each element because it signifies the number of protons of that element. EACH ELEMENT has their UNIQUE number of protons. For eg, atomic number of hydrogen is 1 because it has 1 proton, NO OTHER ELEMENT HAS ATOMIC NUMBER 1 because NO OTHER ELEMENT HAS 1 proton.

You might be interested in

Soil is an example of a:<br> a. solution <br> b. heterogeneous mixture <br> c. solid solution

algol13

Answer:

Heterogeneous mixture

Explanation:

Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture.

6 0

3 years ago

2. Work is done only when an object.<br> in the<br> of the force<br> that is being applied.

sp2606 [1]

Answer:

Whenever a force is applied to an object, causing the object to move, work is done by the force. ... Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work

3 0

3 years ago

A sample of gas has its number of molecules quadrupled, its Kelvin temperature doubled, and its volume tripled. By what factor h

steposvetlana [31]

The new pressure changed relative to the original by a factor of 8/3.

<h3>What is the change in the pressure?</h3>

Using the ideal gas equation;

PV = nRT

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

P1 = nRT/V

P2 = 4n * R * 2T/3V

Hence;

P2/P1 = 4n * R * 2T/3V ÷ nRT/V

P2/P1 = 4n * R * 2T/3V * V/nRT

P2/P1 =4 * 2/3

= 8/3

Learn more about ideal gas law:brainly.com/question/13821925

#SPJ1

4 0

2 years ago

I need an answer now please asap and you will me marked brainiest please it's missing I need it now.

kogti [31]

Answer:

Molecular Mass:

1. 40g per mole

2. 19g per mole

3. 64g per mole

4. 32 g per mole

5. 17g per mole

6. 59.5g per mole

7.58.5 g per mole

8.220g per mole

9. 78g per mole

10. 200g per mole

Explanation:

Molecular Mass = Number of atom x atomic mass of an element

Your Welcome~

8 0

3 years ago

A company wants to put a fleet of low Earth satellites in orbit to create a worldwide telephone link. There is less of a time la

Marianna [84]

If your wanting to know less of the time:

70

250

8 0

3 years ago