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pickupchik [31]
3 years ago
10

I really need help, I don’t know what to do on this

Chemistry
1 answer:
Shtirlitz [24]3 years ago
7 0

Answer:

A: dependent variable

B: experimental group

C: independent variable

D: control variables

E: control group

Explanation:

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I really need help!!! I will give more points to people that actually help!
Andru [333]

Answer:

C8H18 2 114.22852  

O2 25 31.9988  

CO2 16 44.0095  

H2O 18 18.01528

Explanation:

6 0
2 years ago
Determine if the chemical equation is balanced or not balanced. 1N2 + 1H2> NH3 ​
almond37 [142]

Answer:

Explanation:

7 0
3 years ago
The two sides of the equation should be
KonstantinChe [14]

Answer:

Hey mate.....

Explanation:

This is ur answer.....

---> Equal

hope it helps,

mark me as the brainliest,

Follow me......

8 0
3 years ago
Read 2 more answers
The combustion of 0.1240 kg of propane in the presence of excess oxygen produces 0.3110 kg of carbon dioxide. What is the limiti
nadezda [96]

Answer:

The limiting reactant is the propane gas, C₃H₈ while the percentage yield is 83.77%

Explanation:

Here we have

Propane gas with molecular formula C₃H₈, molar mass  = 44.1 g/mol combining with O₂ as follows

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Therefore, 1 mole of C₃H₈  combines with 5 moles of O₂ to produce 3 moles CO₂ and 4 moles of H₂O

Mass of propane = 0.1240 kg = 124.0 g

Number of moles of propane = mass of propane/(molar mass of propane)

The number of moles of propane = 124/44.1 = 2.812 moles

The molar mass of CO₂ = 44.01 g/mol

Mass of CO₂ = 0.3110 kg = 311.0 g

Therefore, number of moles of CO₂ = mass of CO₂/(molar mass of CO₂)

The number of moles of CO₂ = 311.0 kg/ 44.01 g/mol = 7.067 moles

Therefore, since 1 mole of propane produces 3 moles of CO₂, 2.812 moles of propane will produce 3 × 2.812 moles or 8.44 moles of CO₂

Therefore;

The limiting reactant is the propane gas, C₃H₈, since the oxygen is in excess

Hence

The \ percentage \ yield = \frac{Actual \, yield}{Theoretical \, yield} \times 100 = \frac{7.067}{8.44} \times 100 = 83.77 \%

The percentage yield = 83.77%.

7 0
3 years ago
What do scientists predict about freshwater resources in the not-too-distant future ?
Galina-37 [17]

Answer:

There will be a critical shortage. -In garden, water plants early in the morning or in the evening.

5 0
3 years ago
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