3 years ago

The constellations seem to move as the seasons on Earth change. What causes this?

1 answer:

8 0

This change is due to the motion of the Earth in its orbit around the Sun. Each day a few stars are visible in the east that were not visible the night before.

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A sample of gas consists of 4.0 moles, and exists at stp. What is the volume of the gas?

faust18 [17]

Answer:

The volume of the gas is 89.60

Explanation:

When converting from moles to volume, you would multiply by 22.4 because 1 mole equals 22.4 liters at STP.

So...

4.0 moles * 22.4 liters =

89.60 liters

6 0

2 years ago

Read 2 more answers

Match the following terms with their definitions:

Burka [1]

Word-Definition

Pure substance- 4
Matter- 2
Atom- 1
Molecule- 3
Element- 5

4 0

3 years ago

Will sodium iodide react with bromine to produce sodium bromide and iodine? Why or why not?

Gre4nikov [31]

Answer:

Explanation:

The higher the period the higher the activity of an element, therefore, since iodine is in period 6 and bromine is in period 5, the described reaction is not possible due to the fact that bromine is less active

4 0

2 years ago

What is the name for the compound with the formula ncl3?

stellarik [79]

Nitrogen trichloride is the name of this compound

4 0

3 years ago

If an atom has 11 protons and 13 neutrons what is it’s atomic number

Travka [436]

Answer:

the atomic number is 11 and element is Sodium (Na)

Explanation:

Number of Protons = Number of Electrons = 11

Number of Neutrons = 13

Here, the Number of Protons and Number of Electrons is 11

So,

the atomic number is 11 and element is Sodium (Na) 

5 0

2 years ago