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4 years ago

Which sample at STP has the same number of molecules as 5 liters of NO2(g) at STP?

2 answers:

6 0

(2) is the only correct answer. (1) 5 grams of H2 is 2.5 mols of this gas, which would result at STP 22.4 * 2.5 Liters (according to Avogadro's law). 5 moles of O2 would result in 5 * 22.4 Liters, and (4) 5 * 10^23 molecules of CO2 (which is what I assume you meant) would be 5 mols, which would result in 5* 22.4 Liters.

(2) is your answer

My name is Ann [436]4 years ago

4 0

I believe the answer is <span>(2) 5 liters of CH4(g). Hope this helped! :)</span>

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What are the circular lines on a topographic map called

Ann [662]

Circular lines on topographic map is called Contour lines these lines shown on two dimension map and depict elevation on the ground . the distance of each contour line is set to represent a certain level of elevation with zero being sea level . mostly map use distance between coutour lines is 10 m

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3 years ago

What method will speed up a chemical reaction?

Brrunno [24]

I think it is A correct me if i am wrong hope this helps

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4 years ago

In the following reaction, how many grams of nitroglycerin C3H5(NO3)3 will decompose to give 25 grams of CO2?

gogolik [260]

4C₃H₅(NO₃)₃ $_{(l)}$ ------> 12CO₂ $_{(g)}$ + 6N₂ $_{(g)}$ + 10H₂O $_{(g)}$ + O₂ $_{(g)}$

mol of CO₂ = $\frac{mass}{molar mass}$

= $\frac{25g}{44.01 g/mol}$

mol ratio of CO₂ : C₃H₅(NO₃)₃

12 : 4

∴ if mole of CO₂ = 0.568 mol

then " " C₃H₅(NO₃)₃ = $\frac{0.568 mol}{12} * 4$

= 0.189 mol

∴ mass of nitroglycerin = mole * Mr

= 0.189 mol * 227.0995 g / mol

= 43.00 g

8 0

3 years ago

Why does increasing the volume of a closed reaction container increase the thermal energy

lbvjy [14]

Answer:

Explanation:

An increase in the number of gas molecules in the same volume container increases pressure. A decrease in container volume increases gas pressure. An increase in temperature of a gas in a rigid container increases the pressure.

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3 years ago

Decide which element probably forms a compound with chlorine that has a chemical formula most and least similar to the chemical

monitta

Answer:

a. Beryllium,

b. Nitrogen

Explanation:

Most similar to strontium is beryllium, they both are in the 2d group.

Least similar to strontium is nitrogen. Strontium is a metal in the 2d group, Nitrogen is non-metal in the 15th group

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3 years ago