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Kitty [74]
3 years ago
8

Joaquin tells his science class that galaxies consist of gas, dust, and many planets. What is the most important component of ga

laxios Joaquin is missing in his description?
astero de
comets
constellations
Stars
Chemistry
2 answers:
Marina CMI [18]3 years ago
5 0

Answer:

astroid

Explanation:

becaus

Nata [24]3 years ago
3 0

Answer:

the answer is asteroids!

Explanation:

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The table shown here lists the specific heat of several substances.Substance Specific heatJ/g/˚Cwater 4.18ethyl alcohol 2.44benz
Tju [1.3M]

Answer: More heat is required to raise the temperature of 1 g of water 1 ∘C than to raise the temperature of 1 g of ethyl alcohol 1 ∘C.

Benzene is more resistant to temperature change than sulfuric acid.

Water has a high specific heat due to the hydrogen bonding between water molecules.

Sulfuric acid is less resistant to temperature change than water.

Explanation: Specific heat is the the amount of energy that must be absorbed or lost to raise or lower the temperature of 1 g of a substance  by 1°C .

Thus from the given values:

Specific heat of water= 4.18

Specific heat of ethyl alcohol= 2.44

Specific heat of benzene= 1.80

Specific heat of sulphuric acid= 1.40

As the specific heat of water is the most, it means most heat is required to raise the temperature of 1 g of water by 1°C  and it is because the water molecules are strongly held together by hydrogen bonds.

And more is the value of specific heat, more resistance the substance would be for a temperature change and vice versa.

3 0
4 years ago
Assuming no change in temperature and pressure, calculate the volume of O2 (in liters) required for the complete combustion of 1
Natali [406]

Answer : The number of moles of oxygen gas required are, 4.49 moles.

Explanation :

The balanced chemical reaction is:

2C_4H_{10}(g)+13O_2(g)\rightarrow 8CO_2(g)+10H_2O(l)

First we have to calculate the moles of butane gas.

As we know that, 1 mole of substance occupies 22.4 L volume of gas.

As, 22.4 L volume of butane gas present in 1 mole of butane gas

So, 15.5 L volume of butane gas present in \frac{15.5}{22.4}=0.692 mole of butane gas

Now we have to calculate the moles of oxygen gas.

From the balanced chemical reaction we conclude that,

As, 2 moles of butane gas react with 13 moles of oxygen gas

So, 0.692 moles of butane gas react with \frac{13}{2}\times 0.692=4.49 moles of oxygen gas

Therefore, the number of moles of oxygen gas required are, 4.49 moles.

3 0
4 years ago
Determine the number of Mg2+ and PO3−4 ions required to form a neutral ionic compound. Cations and anions
Ierofanga [76]

Answer:

Mg₃(PO₄)₂

Explanation:

Note: The phosphate ion is PO₄³⁻

3Mg⁺² + 2PO₄³⁻ => Mg₃(PO₄)₂

5 0
2 years ago
C2H2 + 2H2 → C2H6<br> How many moles of hydrogen are needed to produce 13.78 mol of ethane?
Scilla [17]

Answer:

27.56 moles

Explanation:

8 0
4 years ago
Which statement correctly describes a characteristic that a scientific measuring toll should have?
Gwar [14]

Answer:

Explanation:

To be accurate, it must be able to make measurements that are close to the actual value.

6 0
3 years ago
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