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alina1380 [7]
3 years ago
12

2. An alkane has at least on C=C bond. ut of Select one: O True O False

Chemistry
1 answer:
garik1379 [7]3 years ago
8 0
I think it’s false?????
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ammonia gas reacts with oxygen gas, o2(g), to produce nitrogen dioxide and water. when 28.5 g of ammonia gas reacts with 83.4 g
jolli1 [7]

The percent yield of the reaction between ammonia gas with oxygen gas is 90.52%.

A chemical reaction between ammonia gas (NH3) with oxygen gas (O2)

NH₃ + O₂ → NO₂ + H₂O

The balanced reaction 4NH₃ + 7O₂ → 4NO₂ + 6H₂O

Calculate the number of moles from the reactant

  • Ammonia gas
    Molar mass N = 14 gr/mol
    Molar mass H = 1 gr/mol
    Molar mass NH₃ = 14 + (3 × 1) = 14 + 3 = 17 gr/mol
    mass = 28.5 grams
    n = m ÷ molar mass = 28.5 ÷ 17 = 1.68 mol
  • Oxygen gas
    Molar mass O = 16 gr/mol
    Molar mass O₂ = 16 × 2 = 32 gr/mol
    mass = 83.4 grams
    n = m ÷ molar mass = 83.4 ÷ 32 = 2.61 mol
  • n O₂ ÷ coefficient O₂ = 2.61 ÷ 7 = 0.37
    n NH₃ ÷ coefficient NH₃ = 1.68 ÷ 4 = 0.42
    0.42 > 0.37 it means that the ammonia gas is in excess and the O₂ is limiting.

According to stoichiometry, the number of moles NO₂ with the number of moles O₂ has the ratio with the coefficient in reaction.

  • Theoretically the number moles of NO₂
    n O₂ : n NO₂ = 7 : 4
    2.61 : n NO₂ = 7 : 4
    n NO₂ = 4 x 2.61 : 7 = 1.49 mol
  • The actual number of moles NO₂
    Molar mas NO₂ = 14 + (16 × 2) = 14 + 32 = 46 gr/mol
    n NO₂ = m ÷ molar mass = 61.9 ÷ 46 = 1.35 mol

The percent yield NO₂ is the ratio of the actual number of moles NO₂ with the theoretical number of moles NO₂ times 100%.

P = (1.35 ÷ 1.49) × 100%

P = 0.9052 × 100%

P = 90.52%

Learn more about stoichiometry here: brainly.com/question/13691565

#SPJ4

7 0
1 year ago
You are unsure of the volume of a substance, but you know that it has a density of 4 g/ml and a mass of 16 grams. What is its vo
avanturin [10]

Answer:

4 mL

Explanation:

Use the density formula, d = m/v

Plug in the density and mass to solve for v:

4 = 16/v

4v = 16

v = 4

So, the volume is 4 mL

3 0
3 years ago
Need help !!!!! ASAP
Galina-37 [17]

Answer:

Barometer.

Explanation:

  • A barometer is a scientific instrument used to measure air pressure. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, high pressure systems and frontal boundaries.
  • There are many types of barometers: water-based barometers, mercury barometers, vacuum pump oil barometer, and aneroid barometers.
8 0
3 years ago
How many molecules are in there in 2.5 moles of glucose C6H12O6?
OleMash [197]

Answer

1.5055\times10^{24}\text{ molecules}

Explanation

We need a conversion factor that will converts from moles of glucose, C6H12O6 to molecules of glucose.

That is, one mole of any substance contains 6.022 x 10²³ molecule of that substance.

\begin{gathered} 1\text{ mole = 6.022}\times10^{23} \\ 2.5\text{ moles }=\frac{6.022\times10^{23}\times2.5}{1}=1.5055\times10^{24}\text{ molecules} \end{gathered}

1.5055 x 10^24 molecules of glucose are in 2.5 moles of glucose C6H12O6

5 0
1 year ago
What is the molarity of a solution formed when you add 200. Ml of water to 50. Ml of 5. 0 m hcl
Gnesinka [82]

The molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

<h3>How to calculate molarity?</h3>

The molarity of a solution can be calculated using the following formula:

M1V1 = M2V2

Where;

  • M1 = molarity of a base
  • M2 = molarity of acid
  • V1 = volume of base
  • V2 = volume of acid

M1 × 200 = 50 × 5

200M1 = 250

M1 = 250/200

M1 = 1.25M

Therefore, the molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

Learn more about molarity at: brainly.com/question/12127540

6 0
2 years ago
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