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3 years ago

Help me plzz in chemistry

Chemistry

1 answer:

AlexFokin [52]3 years ago

5 0

a) f2 loses electrons and is oxidised. li gains electrons and is reduced

c)sn2+ loses electrons and is oxidised.Al gains electrons and is reduced

b)br2 loses electrons and is oxidised. I- in KI gains electrons and is reduced

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Carbon and oxygen can only combine to form one compound. Select one aFalse b. True

erastovalidia [21]

Answer:

False

Explanation:

Carbon and Oxygen can for Carbon Monoxide (CO), Carbon Dioxide (CO2), Carbon Trioxide (CO3), etc.

3 0

3 years ago

What does the principal quantum number determine? Check all that apply. Check all that apply. the possible number of electorns o

vladimir2022 [97]

Answer:

ii) the energy of the electron on the outer shell

iv) the overall size of an orbital

Explanation:

There are four quantum numbers to define the position and energy level of an electron in an atom

a) Principal : The principal quantum number (n) is to know the energy of an electron in an atom and its possible distance from the nucleus.

b) Azimuthal: It refers to the shape of the subshell or orbital of the electron and thus the angular distribution.

c) Magnetic: It refers to the number of orbits and their orientation in the subshell.

d) spin: It refers to the spin of the electron.

8 0

3 years ago

1. How many liters of Co, gas are produced from 3.5 moles of 02

Pavel [41]

The Equation of reaction

C + O2 === CO2

First Blank spot would be

---- 3.5moles of O2

2nd spot

Up.... 1mole of CO2

Down ---- 2moles of Oxygen atoms

3rd spot

Up... --- 22.4L of CO2(1mole of any gas at STP contains 22.4L)

Down---- 1mole of CO2

Final answer --- 3.5 x 1/2 x 22.4

=39.2L of CO2

7 0

3 years ago

1. A gas having the following composition is burnt under a boiler with 50% excess air.

jeka94

The composition of the stack gas are :

$CH_4$ = 0.8713

$C_3H_8$ = 0.0202

CO = 0.107

<h3 /><h3>What is a mole fraction?</h3>

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of $CH_4$ : 70% of 100 g = 70 g

Mass of $C_3H_8$ : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of $CH_4$ : $\frac{70 g}{16.04 g/mol}$ = 4.3 mole

Number of moles of $C_3H_8$ : $\frac{15 g}{144.1 g/mol}$ = 0.10 mole

Mass of CO : $\frac{15 g}{28.01 g/mol}$ = 0.53 mole

Now to calculate the mole fraction of each we use the formula:

Mole fraction of $CH_4$ : $\frac{4.3}{4.935}$ = 0.8713

Mole fraction of $C_3H_8$ : $\frac{0.10}{4.935}$ = 0.0202

Mole fraction of CO : $\frac{0.53}{4.935}$ = 0.107

Hence, composition of the stack gas are:

$CH_4$ = 0.8713

$C_3H_8$ = 0.0202

CO = 0.107

Learn more about mole fraction here:

brainly.com/question/13135950

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8 0

3 years ago

In general, which two factors determine the overall temperature of earth's atmosphere?

ehidna [41]

These two factors are:
*radiation coming into the Earth's atmosphere
*radiation going out the Earth's atmosphere

These two factors could be lumped into one natural phenomenon called the greenhouse effect. The Earth's atmosphere is a very unique characteristic in the solar system because it makes the planet livable. Without the atmosphere's work, the day would be too hot and the night would be too cold. The trapping of radiation, hence heat, keeps the overall temperature of the Earth.

3 0

4 years ago

Help me plzz in chemistry​

Help me plzz in chemistry