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Aleks [24]
3 years ago
5

PLEASES HELP ASAP

Chemistry
2 answers:
pentagon [3]3 years ago
6 0
The 02 is a solid. I hope thus helped you :)
HACTEHA [7]3 years ago
6 0

Answer:

Product

Explanation:

In representing chemical reactions with equations, the following are some general rules

  • reactants are written on the left
  • products are written on the right
  • catalysts are written on the arrow
  • the states of each molecules involved are written as subscripts in brackets. Where "aq" stands for aqueous, "l" stands for liquid, "g" stands for gas" and "s" stands for solid

From the above points, it can be deduced that hydrogen peroxide (H₂O₂) is the reactant but this reaction also suggests that H₂O₂ is been broken down (most likely thermally) since it is the only reactant and we have two products. O₂ gas and H₂O are the products in this reaction.

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How many molecules are in 7.62 L of CH4, at 87.5°C and 722 torr
pickupchik [31]

Answer: There are 1.469 \times 10^{23} molecules present in 7.62 L of CH_4 at 87.5^{o}C and 722 torr.

Explanation:

Given : Volume = 7.62 L

Temperature = 87.5^{o}C = (87.5 + 273) K = 360.5 K

Pressure = 722 torr

1 torr = 0.00131579

Converting torr into atm as follows.

722 torr = 722 torr \times \frac{0.00131579 atm}{1 torr}\\= 0.95 atm

Therefore, using the ideal gas equation the number of moles are calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

PV = nRT\\0.95 atm \times 7.62 L = n \times 0.0821 L atm/mol K \times 360.5 K\\n = \frac{0.95 atm \times 7.62 L}{0.0821 L atm/mol K \times 360.5 K}\\= \frac{7.239}{29.59705}\\= 0.244 mol

According to the mole concept, 1 mole of every substance contains 6.022 \times 10^{23} atoms. Hence, number of atoms or molecules present in 0.244 mol are calculated as follows.

0.244 mol \times 6.022 \times 10^{23}\\= 1.469 \times 10^{23}

Thus, we can conclude that there are 1.469 \times 10^{23} molecules present in 7.62 L of CH_4 at 87.5^{o}C and 722 torr.

5 0
3 years ago
A gas that has a volume of 28 liters, a temperature of 45 °C, and an unknown pressure has its volume increased
allochka39001 [22]

Answer:

2.5 atm

Explanation:

V1 = 28L

T1 = 45°C = (45 + 273.15)K = 318.15K

V2 = 34L

T2 = 35°C = (35 + 273.15)K = 308.15k

P2 = 2.0atm

P1 = ?

From general gas equation,

(P1 × V1) / T1 = (P2 × V2) / T2

P2 × V2 × T1 = P1 × V1 × T2

P1 = (P2 × V2 × T1) / (V1 × T2)

P1 = (2.0 × 34 × 318.15) / (28 × 308.15)

P1 = 21634.5 / 8628.2

P1 = 2.5 atm

The initial pressure of the gas is 2.5atm

5 0
3 years ago
How many total electrons are in a Fe2 ion?
Rina8888 [55]
Electronic distribution of iron Fe²+

1s^2,2s^2,2p^6,3s^2,3p^6,3d^6,4s^2

26 -  2 = 24 electrons

hope this helps!

8 0
3 years ago
In which orbital below would an electron (on average) be farthest from the nucleus?
ozzi

Answer:

4f its the last orbital of the above

5 0
3 years ago
1. What is the main property of a good insulator?
jok3333 [9.3K]

Answer: 1. Insulators have strong bonds that hold their particles rigidly in place.

2. Glass is resistant to many corrosive chemicals. Silver is often used for contact points in electrical and motor control switches.

3. Insulators are important to keep us safe from electricity.

5 0
3 years ago
Read 2 more answers
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