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Tema [17]
3 years ago
13

If a reference point changes,which of the following statements is true?

Chemistry
2 answers:
artcher [175]3 years ago
7 0

Answer:

I believe the answer is  A. The position of the object changes

Hope this helps you, luv! :-) If you need anymore help, please ask me.

Nataly [62]3 years ago
5 0

Answer: Option (a) is the correct answer.

Explanation:

A reference point is defined as the point which represents motion or movement  of an object from one point to another.

For example, an object A is initially present at position X and after sometime it is moved to position Y.

This means that position of the object has changed now. This represents a reference point.

Thus, we can conclude that if a reference point changes the position of the object changes.

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Mosquitoes lays eggs that must hatch in water. The young, called larvae live their first few days in water
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Answer:

Explanation:

I believe he is C

3 0
3 years ago
Nitrogen gas reacts with hydrogen gas to produce ammonia. How many liters of hydrogen gas at 95kPa and 15∘C are required to prod
viktelen [127]

Answer:

222.30 L

Explanation:

We'll begin by calculating the number of mole in 100 g of ammonia (NH₃). This can be obtained as follow:

Mass of NH₃ = 100 g

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3

= 17 g/mol

Mole of NH₃ =?

Mole = mass /molar mass

Mole of NH₃ = 100 / 17

Mole of NH₃ = 5.88 moles

Next, we shall determine the number of mole of Hydrogen needed to produce 5.88 moles of NH₃. This can be obtained as follow:

N₂ + 3H₂ —> 2NH₃

From the balanced equation above,

3 moles of H₂ reacted to produce 2 moles NH₃.

Therefore, Xmol of H₂ is required to p 5.88 moles of NH₃ i.e

Xmol of H₂ = (3 × 5.88)/2

Xmol of H₂ = 8.82 moles

Finally, we shall determine the volume (in litre) of Hydrogen needed to produce 100 g (i.e 5.88 moles) of NH₃. This can be obtained as follow:

Pressure (P) = 95 KPa

Temperature (T) = 15 °C = 15 + 273 = 288 K

Number of mole of H₂ (n) = 8.82 moles

Gas constant (R) = 8.314 KPa.L/Kmol

Volume (V) =?

PV = nRT

95 × V = 8.82 × 8.314 × 288

95 × V = 21118.89024

Divide both side by 95

V = 21118.89024 / 95

V = 222.30 L

Thus the volume of Hydrogen needed for the reaction is 222.30 L

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3 years ago
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inysia [295]

Answer:

i belive A, i cold be wrong tho, pls tell me if im right if you fully find out

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