All categories

2 years ago

According to the Law of Conservation of Mass, how much water is produced if 22.5 g of

Chemistry

1 answer:

nadezda [96]2 years ago

4 0

Answer: The amount of water produced is 9.3 grams

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

$CH_4+2O_2\rightarrow CO_2+2H_2O$

mass of reactants = mass of methane + mass of oxygen = 22.5 g + 35.7 g = 58.2 g

mass of products = mass of carbon dioxide + mass of water = 48.9 g + mass of water

48.9 g + mass of water = 58.2 g

mass of water = 9.3 g

You might be interested in

NaCl and AgNO3 react in a double replacement reaction. Which is one of the products of this reaction?

hoa [83]

Answer:

nano3+agcl2

Explanation:

double displacement reaction

7 0

2 years ago

A sample of aluminum absorbs 9.86 J of heat, upon which the temperature increases from 23.2°C to 30.5°C. Since the specific heat

True [87]

Answer:

1.50 g

Explanation:

The heat absorbed by the aluminum in this case is:

q = m x C x ΔT m= q/ (C x ΔT)

q= 9.86 J

C = 0.90 J/g-K

ΔT = ( 30.5 ºC - 23.2 ºC ) = 7.3 ºC = 7.3 K (this is a range of temperature)

m = 9.86 J / ( 0.90 J/g-K ) x 7.3 K ) = 1.50 g

8 0

2 years ago

Use the Earth's Energy Budget diagram to answer the question. Based on the diagram, less solar energy that reaches Earth is ____

Ivan

absorbed, radiated
Hope this helps.

5 0

2 years ago

11. The electron configuration for phosphorous is [Ar]3s23p4. TRUE FALSE

user100 [1]

Answer:

False

Explanation:

Phosphorus is number 15 on the periodic table, so its electronic configuration is:

${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{2} {3p}^{3}$

5 0

1 year ago

C2H5OH( l) + 3O2( g) → 2CO2( g) + 3H2O( l); Δ H = –1.37 × 103 kJ Consider the following propositions: I. The reaction is endothe

Svetlanka [38]

Answer:

II. The reaction is exothermic.

III. The enthalpy term would be different if the water formed was gaseous.

Explanation:

For the reaction:

C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)

The ΔH is -1.37×10³ kJ. As the change in enthalpy is <0, II. The reaction is exothermic.

The ΔH formation of a compound is different if the chemical is in liquid or gaseous phase. For that reason: III. The enthalpy term would be different if the water formed was gaseous.

I hope it helps!

3 0

2 years ago