3 years ago

Help its super duper easy!

Chemistry

2 answers:

Radda [10]3 years ago

7 0

I think it's 6?...........

Nat2105 [25]3 years ago

5 0

Answer:

It is number 1.

Explanation:

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2Ag + S --> Ag2S would be classified as a(n) _____________ reaction.

yaroslaw [1]

Answer:

its 2 parts creating a group which would be combustion

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(50 POINTS AND WILL GIVE BRAINLY!) which actions will help a package of hot chocolate powder to dissolve more quickly?

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3 years ago

How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909

makkiz [27]

Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atmosphere respectively.

1 mole of every gas occupy volume at STP = 22.4 L

The balanced chemical reaction is:

$2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)$

3909.9 kJ of of energy is produced by = $15\times 22.4=336L$

100 kJ of oxygen gas are needed to produce = $\frac{336}{3909.9}\times 100=8.59L$

7 0

3 years ago

What type of bonding is occuring in the compound below?

rewona [7]

Answer:

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2 years ago

How much heat must be absorbed by 125 g of ethanol to change its temperature from 21.5 ∘C to 34.8 ∘C? (Specific heat capacity of

Katarina [22]

Answer:

Option D. 4.02 kJ

Explanation:

A simple calorimetry problem

Q = m . C . ΔT

ΔT = Final T° - Initial T°

C = Specific heat capacity

m = mass

Let's replace the data

Q = 125 g . 2.42 J/g∘C . (34.8°C -21.5 °C)

Q= 4023.25 J

We must convert the answer to kJ

4023.25 J . 1kJ /1000 =4.02kJ

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3 years ago