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Stella [2.4K]
4 years ago
12

Which chemical symbols will complete the equation for this decomposition reaction?

Chemistry
2 answers:
kondaur [170]4 years ago
6 0

Answer:

Decomposition of KI:

2KI → 2K + 2I

Troyanec [42]4 years ago
3 0
2kl_> 2k +2L for a decomposition reaction
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Molecule contains carbon, hydrogen and sulfur atoms. When a sample of 0.535g of this compound is burnt in oxygen, 1.119 g of CO2
OLga [1]

Answer:

The empirical formula is, C4H4S

Explanation:

Number of moles of carbon = 1.119 g/ 44g/mol = 0.025 moles

Mass of Carbon= 0.025 moles × 12 g/ mole = 0.3 g

Number of moles of hydrogen = 0.229/18g/mol × 2 = 0.025 moles

Mass of hydrogen = 0.025 moles × 1 = 0.025 g

Number of moles of sulphur = 0.407g/ 64 g/mol = 0.0064 moles

Mass of sulphur= 0.0064 moles ×32 = 0.2 g

Now we obtain the mole ratios by dividing through by the lowest ratio.

C- 0.025 moles/ 0.0064 moles, H- 0.025 moles/ 0.0064 moles, S- 0.0064 moles/0.0064 moles

C4H4S

4 0
3 years ago
What are some of the positive and<br> negative effects of the use of plastics?
trapecia [35]

Answer:

Positive: Save fuel and reduces greenhouse gas

Negative: Harmful to human and animal health ( underwater animals), Hurts the food chain

Explanation:

I got it from a video. Hopefully it helps you.

4 0
3 years ago
A major component of gasoline is octane (C8H18). When octane is burned in air, it chemically reacts with oxygen gas (O2) to prod
Molodets [167]

Answers:

8.70 g

Step-by-step explanation:

We know we will need a balanced equation with masses and molar masses, so let’s <em>gather all the information</em> in one place.  

M_r:                   32.00      44.01

           2C₈H₁₈ + 25O₂ ⟶ 16CO₂ + 18H₂O

m/g:                    9.88

(a) Calculate the <em>moles of O₂ </em>

n = 9.88 g O₂ ×1 mol O₂ /32.00 g O₂

n = 0.3088 mol O₂

(b) Calculate the <em>moles of CO₂</em>

The molar ratio is (16 mol CO₂/25 mol O₂)

n = 0.3088 mol O₂ × (16 mol CO₂/25 mol O₂)

n = 0.1976 mol CO₂

(c) Calculate the <em>mass of CO₂ </em>

Mass of CO₂ = 0.1976 mol CO₂ × (44.01 g CO₂/1 mol CO₂)

Mass of CO₂ = 8.70 g CO₂

7 0
3 years ago
The property which primarily controls how much water can be present as a gas is:
Assoli18 [71]
The temperature of the air is the property which primarily controls how much water can be present as a gas. 

Meteorology is the study of the atmosphere. It primarily focuses on weather which is defined as the condition of the atmosphere at a certain time and place. It changes every day depending on earth location. There are five factors that affect weather namely, temperature, pressure, humidity, wind and precipitation.

The question above primarily talks about humidity-the amount of water vapor in the air. As the  temperature increases, the air or gas can hold more water. The warmer the air is, the more water it can possibly hold as vapor.
6 0
4 years ago
What energy transformation occurs in solar panels found on a roof?
sweet [91]

Explanation:

Solar panels are visible on roof tops on homes and businesses. Solar thermal technology transforms solar energy to heat, which is then used to heat homes, businesses and even swimming pools, or transformed again into electricity.

3 0
3 years ago
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