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MaRussiya [10]
2 years ago
9

How does the law of conservation of mass apply to this reaction: C2H4+O2=H2O+Co2?

Chemistry
2 answers:
polet [3.4K]2 years ago
5 0

Answer:  Only the oxygen needs to be balanced.  There are equal numbers of hydrogen and carbon.

Explanation:

pav-90 [236]2 years ago
3 0
Consider the formation of water molecule. Hydrogen combines with oxygen to form  a water molecule.

 

In this case, the total mass of the reactants = total mass of the products. Also, the number of atoms of hydrogen and oxygen in the reactants side and the products side are equal.

that's all I know

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Balloon has a volume of 600-ml at temperature of 360 K. If the temperature of
Molodets [167]

Answer:

V₂ ≈416.7 mL

Explanation:

This question asks us to find the volume, given another volume and 2 temperatures in Kelvin. Based on this information, we must be using Charles's Law and the formula. Remember, his law states the volume of a gas is proportional to the temperature.

  • V₁ / T₁ = V₂ / T₂

where V₁ and V₂ are the first and second volumes, and T₁ and T₂ are the first and second temperature.

The balloon has a volume of 600 milliliters and a temperature of 360 K, but the temperature then drops to 250 K. So,

  • V₁= 600 mL
  • T₁= 360 K
  • T₂= 250 K

Substitute the values into the formula.

  • 600 mL /360 K = V₂ / 250 K

Since we are solving for the second volume when the temperature is 250 K, we have to isolate the variable V₂. It is being divided by 250 K. The inverse o division is multiplication, so we multiply both sides by 250 K.

  • 250 K * 600 mL /360 K = V₂ / 250 K * 250 K
  • 250 K * 600 mL/360 K = V₂

The units of Kelvin cancel, so we are left with the units of mL.

  • 250 * 600 mL/360=V₂
  • 416.666666667 mL= V₂

Let's round to the nearest tenth. The 6 in the hundredth place tells us to round to 6 to a 7.

  • 416.7 mL ≈V₂

The volume of the balloon at 250 K is approximately 416.7 milliliters.

5 0
2 years ago
Landslides are an example of
ivanzaharov [21]

Answer:

b. erosion.

I believe that this is the best answer

8 0
2 years ago
Read 2 more answers
A solution is initially 0.10m in mg2+(aq) and 0.10m in fe2+(aq). solid naoh is slowly added. what is the concentration of fe2+ w
dexar [7]

Mg(OH)₂  ⇄ Mg²⁺   +   2 OH⁻

Ksp = [Mg²⁺] [OH⁻]²

6.0 x 10⁻¹⁰ = 0.10 x [OH⁻]²

[OH⁻] = 7.746 x 10⁻⁵ M

when Mg(OH)₂ 1st precipitates, [OH⁻] = 7.746 * 10⁻⁵ M

Fe(OH)₂   <—>   Fe²⁺   +   2OH⁻

Ksp = [Fe²⁺] [OH⁻]²

7.9 x 10⁻¹⁶ = [Fe²⁺] x (7.746 x 10⁻⁵)²

[Fe²⁺] = 1.32 x 10⁻⁷ M

Answer: 1.32 x 10⁻⁷ M

5 0
2 years ago
A chunk of pure silver weighs 20.0 g. What is its volume? Silver has a density of 10.49 g/cm cubed. Use unit analysis, NOT the D
julia-pushkina [17]

Answer: 1.91cm3

Explanation:

10.49g of silver dissolves is 1cm3 of solution.

Therefore 20g of silver will dissolve in = 20/10.49 = 1.91cm3 of the solution.

8 0
3 years ago
Balance these equations​
kiruha [24]

Answer:

4Al + 3O2 -> 2Al2O3

2N2 + 6H2 -> 4NH3

5 0
3 years ago
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