The moles of solute particles that are present in 100.0 ml of 2.50M (NH4)3Po4 is 0.25 moles
calculation
moles=volume in liters x molarity
volume in liters=100/1000= 0.1L
molarity=2.50M
moles is therefore= 2.50 x0.1=0.25moles
Answer:
A- 25.9 kJ
Explanation:
ΔH of formation is defined as the amount of energy that is involved in the formation of 1 mole of substance.
ΔH of rust is -826kJ/mol, that means when 1 mole of rust is formed, there are released -826kJ.
Moles of 5.00g of Fe₂O₃ (Molar mass: 159.69g/mol) are:
5.00g ₓ (1 mole / 159.69g) = 0.0313 moles of Fe₂O₃.
If 1 mole release -826kJ, 0.0313 moles release:
0.0313 moles ₓ (-826kJ / 1 mole) =<em> -25.9kJ</em>
Thus, heat involved is:
<h3>A- 25.9 kJ
</h3>
Heat is transmitted to the surroundings as follows: molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
<h3>WHAT IS HEAT TRANSFER</h3>
Heat energy is lost when molecules collide in a chemical reaction.
According to this question, a reaction is occuring in a test tube. The reaction involves a collision of molecules that results in the loss of heat energy.
This energy is transmitted to the surroundings as follows when molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
Learn more about heat transfer at: brainly.com/question/12107378
x = 1.01
Explanation:
Given equation:
y = 1.2345x – 0.6789
y = 0.570
Problem:
Solving for x
The variables in this equation are y and x
They can take up any value since they are variables.
Since we have been given y = 0.570
y = 1.2345x – 0.6789
To solve for x, we simply substitute for y in the equation;
since y = 0.570
0.57 = 1.2345x – 0.6789
add 0.6789 to both sides;
0.57 + 0.6789 = 1.2345x – 0.6789 + 0.6789
1.2489 = 1.2345x
Divide both sides by 1.2345
x = 1.01
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Equations brainly.com/question/9045597
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