The amount of coal burnt each year to produce 8.53 × 10¹⁶ Joule of energy is 2.3 x 10¹² gram.
<h3>
What is Combustion?</h3>
Burning of coal in the presence of air is called combustion.
As according to the given question,
A coal-burning power plant generates 8.53 × 10¹⁶ Joule of energy in a year.
1 gram of coal yields generates 36 kilo joule (36000 Joule) energy.
Hence, to generate 8.53 × 10¹⁶ Joule of energy in a year, the weight of carbon burnt will be ;
= 1/36000 x 8.53 × 10¹⁶
= 2.3 x 10¹² gram
Learn more abut combustion here ;
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Answer:
3.798g of H₂O
Explanation:
In 1 mole of CuSO₄.4H₂O there are 4 molecules of water. The heat produce the releasing of 4 waters of hydration. To solve this question we need to convert the mass of CuSO₄.4H₂O to moles using its molecular mass (231.67g/mol). The moles of CuSO₄.4H₂O times 4 are the moles of water:
<em>Moles CuSO₄.4H₂O:</em>
12.21g CuSO₄ * (1mol / 231.67g) = 0.0527 moles
<em>Moles H₂O:</em>
0.0527 moles * 4 = 0.2108 moles of water
<em>Mass (Molar mass H₂O = 18.015g/mol):</em>
0.2108 mol * (18.015g / mol) =
<h3>3.798g of H₂O</h3>
Answer: (The transfer of energy by a wave does not transfer matter. The transfer of energy by a moving object requires the transfer of matter.)
I hope I helped. :)
It doesn't "change" it it breaks it down. I don't if I got this the right way but i think the small intestine absorbs the needed nutrients. the large one gets the UN wanted junk that produces poop.
Answer:
The molarity of the solution is 0,45 M.
Explanation:
We know that molarity is a concentration measure that expresses moles of solute per liter of solution (1000ml). First we proceed to calculate the mass of 1 mole of compound from the atomic weights of the elements of the periodic table and then we calculate the molarity by a simple rule of three:
Weight 1 mol C2H5OH= (Weight C)x2 + (Weight H)x6 + Weight 0
Weight 1 mol C2H5OH=12 g x 2 + 1g x 6 + 16 g= 46 g/mol
46 g ---1 mol ethanol
1,77g----x= (1,77g x 1 mol ethanol)/46 g= 0,038 mol ethanol
85 ml solution-----0,038 mol ethanol
1000ml solution---x= (1000ml solution x0,038 mol ethanol)/85 ml solution
<em>x=0,45 M---> The solution is 0,45 M</em>
