Mass of oxygen gas needed to burn 37.5g of wax

1 answer:

6 0

Answer is: mass oxygen is 129,28 grams.
Chemical reaction: 2C₁₈H₃₈ + 55O₂ → 36CO₂ + 38H₂O.
m(C₁₈H₃₈) = 37,5 g.
n(C₁₈H₃₈) = m(C₁₈H₃₈) ÷ M(C₁₈H₃₈).
n(C₁₈H₃₈) = 37,5 g ÷ 254 g/mol.
n(C₁₈H₃₈) = 0,147 mol.
From chemical reaction: n(C₁₈H₃₈) : n(O₂) = 2 : 55.
n(O₂) = 4,04 mol.
m(O₂) = 4,04 mol · 32 g/mol.
m(O₂) = 129,28 g.

You might be interested in

Stars making a circular motion across the sky is evidence of

lutik1710 [3]

Answer:

because they are actually moving, or because they reflect our motion through space.

7 0

3 years ago

Read 2 more answers

In the reaction 3H2+ ____ N2 --> 2 NH3, what coefficient should be placed in front of N2 to balance the reaction?

qaws [65]

A.) 1 is your answer.......

4 0

3 years ago

Read 2 more answers

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide,

Pani-rosa [81]

Answer:

D. Partial pressure

Explanation:

Partial pressure is the individual pressure exerted by each gas present in a gaseous mixture. As he is measuring the pressure of each gas in the atmosphere separately, so PARTIAL PRESSURE is the exact term for his measurement.

8 0

3 years ago

THE CONSTANT MOVING OF AND HELP THE TEMPERATURES AROUND THE EARTH REMAIN ABOUT THE SAME AVERAGE

nika2105 [10]

New analysis through 2014 shows that temperature is once again rising at about the same pace as it did over the second half of the 20 th century. PRESS RELEASE. Using the data that were available at the time (through 2012), the last climate report from the Intergovernmental Panel on Climate Change concluded that there had been no statistically significant increase in global surface temperature

(I hope this helps you!)

8 0

4 years ago

Enter your answer in the provided box.The equilibrium constant Kc for the equation2H2(g) + CO(g) ⇌ CH3OH(g)is 35 at a certain te

Sphinxa [80]

Answer:

The concentration of CO is 4.33*10⁻³ $\frac{moles}{L}$

Explanation:

A reversible chemical reaction, as in this case, occurs in both directions: reagents transforming into products (direct reaction) and products transforming back into reagents (reverse reaction).

Chemical Equilibrium is the state in which the direct and indirect reaction have the same reaction rate and is defined by a chemical constant Kc.

Being:

aA + bB ⇔ cC + dD

where A, B, C and D represent the chemical species involved and a, b, c and d their respective stoichiometric coefficients, constant Kc is defined as:

Kc= $\frac{[C]^{c}*[D]^{d} }{[A]^{a} *[B]^{b} }$