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timama [110]
2 years ago
15

How many atoms are in 5Na3PO4​

Chemistry
1 answer:
grigory [225]2 years ago
8 0
NA15,P5,O20 there ya go
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What is the energy change associated with 1.5 mole of D being formed? 
AleksandrR [38]

Answer:

–36 KJ.

Explanation:

The equation for the reaction is given below:

2B + C —› D + E. ΔH = – 24 KJ

From the equation above,

1 mole of D required – 24 KJ of energy.

Now, we shall determine the energy change associated with 1.5 moles of D.

This can be obtained as illustrated below:

From the equation above,

1 mole of D required – 24 KJ of energy

Therefore,

1.5 moles of D will require = 1.5 × – 24 = –36 KJ.

Therefore, –36 KJ of energy is associated with 1.5 moles of D.

3 0
2 years ago
Which of the following most likely happens during a chemical change?
tigry1 [53]

The answer is the last option.

4 0
2 years ago
Which statement describes the atoms in gas???
marissa [1.9K]

Answer:

Option-D : They move freely in all directions.

Explanation:

                  The physical properties of gases are well explained by Kinetic Molecular Theory. The key postulates of this theory are;

                             1) Composition: Gases are made up of small particles called molecules. The size of these molecules is very small as compared to the distance between molecules, therefore the actual volume of molecules is taken negligible as compared to volume occupied by them.

                            2) Intermolecular Forces: All the gas molecules present in a container behaves independently because they have no force of interactions between them Hence, the attractive forces are taken negligible or too little.  

                             3) Energies: Gas molecules have greater kinetic energy as compared to solids and liquids. Hence, The gas molecules move randomly. They collide with each other and with the walls of the container which causes pressure.

Conclusion:

                 Therefore, due to large spaces, no interactions, small sizes and high energies the gas particles move freely and there position is not stationary.

8 0
1 year ago
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Before Darwin published his ideas,all thoughts and theories on design of species came from which book?
ira [324]

Answer:

Darwin had arrived at a complete theory of evolution by 1839, but it was to be another 20 years before he published his ideas of evolution through natural selection in his epochal book On the Origin of Species by Means of Natural Selection.

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2 years ago
What is the purpose of replication?
True [87]

Answer:

2-to produce copies of a DNA molecule

8 0
3 years ago
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