I need help on this one pliz

This is a force that acts over a distance, can not be seen, and causes like poles to repel and opposite poles to attract. What i

algol [13]

Answer:

Magnetic Force

Explanation:

6 0

2 years ago

Read 2 more answers

Which two terms represent types of chemical

maw [93]

3) molecular and structural

Explanation:

Molecular and structural are two terms that represents chemical formula of compounds and molecules.

The molecular formula shows the chemical symbols and the number of atoms combining using subscripts.

The structural formula gives the arrangement of elements in a compound and molecule using a diagrammatic approach.

learn more:

Molecular formula brainly.com/question/6125309

#learnwithBrainly

4 0

2 years ago

Which of the following is NOT a postulate of the Kinetic Molecular Theory?

kotegsom [21]

Answer:

"3. Energy can either be destroyed or created. Its goes from one form to another."

Explanation:

The third answer choice, "3. Energy can either be destroyed or created. Its goes from one form to another. " is related to the Law of Conservation of Energy from thermodynamics. Is it not a postulate of the Kinetic Molecular Theory.

"1. Average Kinetic Energy of the system is a measure of the temperature of the system."

Postulate of Kinetic Molecular Theory $\checkmark$

The average kinetic energy of the system is measured by its temperature and nothing else

"2. Energy is conserved in the collisions between gas molecules.."

Postulate of Kinetic Molecular Theory $\checkmark$

All collisions between gas molecules are perfectly elastic, meaning no energy is lost

"3. Energy can either be destroyed or created. Its goes from one form to another.

$\times$ NOT a Postulate of Kinetic Molecular Theory

Related to Conservation of Energy from thermodynamics

"4. Gases travel in straight line until they collide with other gas molecules"

Postulate of Kinetic Molecular Theory $\checkmark$

All gas molecules will travel in a straight line until they collide with other gas molecules or some object (e.g. a container)

8 0

2 years ago

How many moles are in 7.00E24 atoms of Ca?

iris [78.8K]

Explanation:

In chemistry, a mole is the base unit of the amount of substance in a system containing elementary entities (atoms, molecules, ions, electrons), and one mole of substance corresponds to the Avogadro's constant or $6.023 \ \times \ 10^{23}$ entities. The stoichiometry equation that relates the amount of substance into the measurement in moles is

$n \ = \ \displaystyle\frac{\alpha}{N_{A}}$ ,

where $n$ is the number of moles, $\alpha$ is the amount of substance and $N_{A}$ is the Avogadro's constant.

Therefore,

$n \ = \ \displaystyle\frac{7.00 \ \times \ 10^{24} \ \text{atoms}}{6.023 \ \times \ 10^{23} \ \text{atoms mol}^{-1}} \\ \\ n \ = \ 11.624 \ \text{mol}$ .

3 0

2 years ago

A laser light was shone through a diffraction grating whose lines were 1/1000 mm apart. The distance was measured between the ce

Amanda [17]

540 nm is the answer ! can you help me out please ? it is a science question add me and message me :)

4 0

2 years ago