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zaharov [31]
3 years ago
12

While burning coal and charcoal, you notice that coal releases more heat than charcoal. That means that the... 1. elastic energy

2.gravitational energy 3.chemical potential energy is 1.lower 2. higher in charcoal than in coal
Chemistry
1 answer:
Dafna11 [192]3 years ago
4 0

Answer:

3). Chemical potential energy

1). lower in charcoal than in coal.

Explanation:

Chemical potential energy is defined as the energy that can be absorbed or stored in a substance's chemical bonds. It can be released when there is a change in the number of particles of the substance.

As per the question, coal releases more heat than charcoal because 'the chemical potential energy of charcoal is lower than the coal' <u><em>and hence, the latter would release more heat on burning i.e. the energy that was absorbed in the chemical bonds of the substance</em></u>. Hence, option 3 and 1 are the correct answers.

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What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 ​ h 8 ​ ) (density = 0.867 g/ml) to a 250 m
Virty [35]

Answer:

2.48 mol/L.

Explanation:

  • The molarity of the solution can be expressed as <em>the number of moles of solute in 1.0 liter of the solution, </em>(M = n / V).
  • It is also can be calculated from the relation:

<em>M = (mass / molar mass) solute x (1000 / V of solution)</em>

The solute is toluene and the solvent is benzene.

mass of toluene (solute) = 57.1 g,

molar mass of toluene (solute) = 92.14 g/mol.

volume of the solution = 250 ml.

∴ M =  (mass / molar mass) solute x (1000 / V of solution) = [(57.1 g / 92.14 g/mol) x (1000 / 250 ml)] = 2.48 mol/L.

4 0
3 years ago
Glucose is a carbohydrate that contains carbon hydrogen and oxygen. The empirical formula of glucose is CH2O and it’s molar mass
shtirl [24]
Glucoses and carbonated
6 0
3 years ago
A substance with a define shape and volume is a blank phase of metter
aksik [14]
Definite Shape and Definite Volume is a solid.

NO Definite Shape and Definite Volume is a liquid.

NO Definite Shape and NO Definite Volume is a gas.
4 0
3 years ago
Easy Chemistry/ Help
Sauron [17]
I’m not really sure what the qn is asking for but if i’m not wrong it should be ‘1’ for each blank!
4 0
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in an experiment 3.5g of element A reacted with 4.0g of element G to form a compound Calculate the empirical formula for this co
kolezko [41]

Additional information

Relative atomic mass(Ar) : A=7, G=16

The empirical formula : A₂G

<h3>Further explanation</h3>

Given

3.5g of element A

4.0g of element G

Required

the empirical formula for this compound

Solution

The empirical formula is the smallest comparison of atoms of compound forming elements.

The empirical formula also shows the simplest mole ratio of the constituent elements of the compound

mol of element A :

\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{3.5}{7}=0.5

mol of element G :

\tt mol=\dfrac{4}{16}=0.25

mol ratio A : G = 0.5 : 0.25 = 2 : 1

4 0
3 years ago
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