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3 years ago

I need help on 5 and 6

Chemistry

2 answers:

morpeh [17]3 years ago

3 0

I think that the answers are 16 and 1, I hope this helps!! Good Luck!!

Masteriza [31]3 years ago

3 0

5 is 32 and 6 is 2 that is the answer

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The mass of .10 moles of iron is:

Stels [109]

Answer:

so mass in gram=560grams

Explanation:

number of moles=10moles

molar mass=56grams/moles

mass in gram of Fe=?

as we know that

$number of moles=\frac{mass in gram}{molar mass}$

evaluating the formula

number of moles×molar mass=mass in gram

mass in gram=10moles×56grams/moles

mass in gram=560grams

i hope this will help you :)

8 0

4 years ago

Read 2 more answers

Write the recation of formation of ions by fluorine and potassium

bekas [8.4K]

Answer: The reaction of formation of ions by fluorine and potassium is $K^{+} + F^{-} \rightarrow KF$ .

Explanation:

Atomic number of potassium is 19 and its electronic distribution is 2, 8, 8, 1. So, in order to attain stability it needs to lose 1 electron due to which it forms $K^{+}$ ion.

Atomic number of fluorine is 9 and its electronic distribution is 2, 7. In order to attain stability it needs to gain one electron and hence forms $F^{-}$ ion.

Therefore, when both these ions come in contact with each other then it leads to the formation of KF compound.

The reaction equation for this is as follows.

$K^{+} + F^{-} \rightarrow KF$

Thus, we can conclude that the reaction of formation of ions by fluorine and potassium is $K^{+} + F^{-} \rightarrow KF$ .

5 0

3 years ago

In a constant‑pressure calorimeter, 70.0 mL of 0.350 M Ba(OH)2 was added to 70.0 mL of 0.700 M HCl. The reaction caused the temp

DanielleElmas [232]

Answer: The amount of heat absorbed by the solution is 2.795 kJ

Explanation:

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of water = 1 g/mL

Volume of water = [70 + 70] = 140 mL

Putting values in above equation, we get:

$1g/mL=\frac{\text{Mass of water}}{140mL}\\\\\text{Mass of water}=(1g/mL\times 140mL)=140g$

To calculate the heat absorbed, we use the equation:

$q=mc\Delta T$

where,

q = heat absorbed

m = mass of water = 140 g

c = heat capacity of water = 4.186 J/g°C

$\Delta T$ = change in temperature = $T_2-T_1=(28.74-23.97)^oC=4.77^oC$

Putting values in above equation, we get:

$q=140g\times 4.186J/g^oC\times 4.77^oC=2795.4J=2.795kJ$

Hence, the amount of heat absorbed by the solution is 2.795 kJ

3 0

3 years ago

A gas has a volume of 3L at 21'c, if the gas heater to 100'c , what is the new volume?

allochka39001 [22]

Answer:

38.1 L

Explanation:

Data given:

initial volume V1 of a gas = 3 L

initial Temperature T1 of a gas = 21 °C

convert Temperature to Kelvin

T1 = °C +273

T1 = 21°C + 273 = 294 K

final Temperature T2 of a gas = 100°C

convert Temperature to Kelvin

T2 = °C +273

T2 = 100°C + 273 = 373 K

final Volume V2 of a gas = ?

Solution:

This problem will be solved by using Charles' law equation at constant pressure.

The formula used

V1 / T1 = V2 / T2

As we have to find out Volume, so rearrange the above equation

V2 = V1 x T2 / T1

Put value from the data given

V2 = 3 L x 373 K / 294 K

V2 = 38.1 L

So the final Volume of a gas = 38.1 L

5 0

3 years ago

Give a term for each description.Organic chemicals that can vaporize into the air.Secondary chemicals whose formation is facilit

Phantasy [73]

Answer:

Volatile organic compounds
secondary pollutants or photochemical substances
Air Quality
Air pollution
Aerosols

Explanation:

Volatile organic compounds are the organic chemicals that get easily vaporized in air.

The secondary chemicals or the secondary pollutants are the photochemical substances that are formed in the presence of sunlight.

The amount of gases and small particles present in the atmosphere, responsible for influencing ecosystem and the wellness of human beings is known as the Air Quality

Air pollution refers to the high concentrations of gases or small particles that are present in the atmosphere, which can cause harm to the humans and other living organisms and structures established by humans.

Aerosols are the tiny particles present in liquid or solid state, that are suspended in air.

4 0

3 years ago