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3 years ago

Name the gas which is formed when coal is heated in the absense of air

Chemistry

1 answer:

Andrew [12]3 years ago

8 0

Answer:

Coke

Explanation:

A solid fuel formed by heating coal in the absence of air is coke. Coke is black colored, tough porous substance. It is pure carbon.

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PLS HELP ILL MAKE BRAINLIEST 30 POINTS!!

Yanka [14]

Answer:

tendons and ligaments

6 0

2 years ago

Calculate the number of pounds of CO2 released into the atmosphere when a 22.0 gallon tank of gasoline is burned in an automobil

IrinaK [193]

Answer:

391.28771 pounds of carbon-dioxide released into the atmosphere.

Explanation:

Density of the gasoline ,d= 0.692 g/mL

Volume of gasoline in an tanks,V = 22.0 gallons = 83,279.02 mL

Let mass of the gasolin be M

$d=\frac{M}{V}$

M = V × d = 83,279.02 mL × 0.692 g/mL=57,629.081 g

Assume that gasoline is primarily octane (given)

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$

Mass of octane burnt in the tank = M = 57,629.081 g

Moles of octane = $\frac{57,629.081 g}{114.08 g/mol}=505.1637 mol$

According to reaction, 2 moles of octane gives 16 moles of carbon-dioxide.

Then 505.1637 mol of octane will give:

$\frac{16}{2}\times 505.1637 mol=4,041.3100 mol$ of carbon-dioxide

Mass of 4,041.3100 mol of carbon-dioxide:

4,041.3100 mol × 44.01 g/mol = 177,858.05 g

Mass of carbon-dioxide produced in pounds = 391.28771 pounds

391.28771 pounds of carbon-dioxide released into the atmosphe

4 0

3 years ago

A chemist prepares a solution of sodium nitrate (NaNO3) by measuring out 286. umol of sodium nitrate into a 450. mL volumetric f

shusha [124]

Answer:

Concentration of sodium nitrate solution is 0.636 mmol/L

Explanation:

We know, $1micromol=1\times 10^{-3}mmol$

So, $286.micromol=(286.\times 10^{-3})mmol=0.286mmol$

Concentration in mmol/L is defined as number of mmol of solute dissolved in 1000 mL of solution

Here solute is $NaNO_{3}$

Total volume of solution = Total volume of volumetric flask = 450. mL

Hence concentration of $NaNO_{3}$ solution = $\frac{0.286mmol}{450.mL}\times 1000=0.636mmol/L$

So, concentration of sodium nitrate solution is 0.636 mmol/L

3 0

3 years ago

Why was temperature change for the water slight in your experiments while the temperature change for the metal was large?.

ohaa [14]

Temperature change for water was slight compared to temperature change in metal because of specific heating capacities.

Specific heat capacity, moreover, known basically as specific heat, is the degree of the warm vitality required to extend the temperature of a unit amount of a substance by a certain temperature interim.

Regularly, the metal pole would be much hotter than the water. So, the conclusion can be made that the particular warm of metal is lower than the particular warm of water.

It requires less warm per unit mass to form a more noteworthy alteration in temperature for metal than it does for water.

Specific heat is additionally some of the time alluded to as heat capacity.

Casually, it is the sum of warm that must be included in one unit of mass of the substance in arrange to cause an increment of one unit in temperature. The SI unit of particular warm capacity is joule per kelvin per kilogram, J⋅kg −1 ⋅K −1.

Learn more about temperature change at

brainly.com/question/19051558

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5 0

1 year ago

Please guys help me with this

Finger [1]

Answer:

It's B.

Explanation:

5 0

3 years ago