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stepan [7]
2 years ago
15

Which of these options is the odd one out?Molecule AtomCompoundMixture​

Chemistry
1 answer:
77julia77 [94]2 years ago
5 0

Answer:

it is mixture have a great day

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PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEWSE HELP PLEASE H
marishachu [46]

Answer:

23.6 moles

Explanation:

From the question given above, the following data were obtained:

Mass of air = 3.6 Kg

Mass percentage of O₂ = 21%

Number of mole of O₂ =?

Next, we shall convert 3.6 Kg of air to grams (g). This can be obtained as follow:

1 kg = 1000 g

Therefore,

3.6 Kg = 3.6 Kg × 1000 / 1 kg

3.6 Kg = 3600 g

Next, we shall determine the mass of O₂ in the air. This can be obtained as follow:

Mass of air = 3600 g

Mass percentage of O₂ = 21%

Mass of O₂ =?

Mass of O₂ = 21% × 3600

Mass of O₂ = 21/100 × 3600

Mass of O₂ = 756 g

Finally, we shall determine the number of mole of O₂ in the sample of air. This can be obtained as follow:

Mass of O₂ = 756 g

Molar mass of O₂ = 2 × 16 = 32 g/mol

Number of mole of O₂ =?

Mole = mass /Molar mass

Number of mole of O₂ = 756 / 32

Number of mole of O₂ = 23.6 moles

Thus, the number of mole of O₂ in the

sample of air is 23.6 moles

7 0
3 years ago
2NO(g) + O2 (g) --> 2NO2
Tatiana [17]
Take 5 * 2/1 = 10 mol NO needed
10 mol * 30 g/mol = 300g

Answer C
5 0
3 years ago
A 4.000 g sample of iron was heated from 0.0°C to 21.0°C. If it has a specific heat of 0.440 kJ/kg °C, how many kilojoules of he
Mashutka [201]
M = 4 g = 4/1000 kg = 0.004 kg, θ₂ = 21.0°C, θ₁ = 0°C , c = 0.44kJ/kg°C,

Q = mc(θ₂ - θ₁)

Q = 0.004*0.440*(21 - 0)

Q  =  0.03696 kJ 

0.03696 kJ<span> of heat is absorbed.</span>
6 0
3 years ago
Metal cations are atoms that have a positive charge. What type of bond is metal cation likely to form?
Akimi4 [234]

Answer:

An ionic bond

Explanation:

An M⁺ cation will be attracted to an X⁻ anion.

The bond formed by a cation-anion attraction is an ionic bond.

4 0
3 years ago
Read 2 more answers
Choose the correct word that describes the description. If you add too much sugar to the water, some of the crystals will sit on
Triss [41]

Answer:

saturated

Explanation:

7 0
3 years ago
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