What is the enthalpy of the reaction?

1 answer:

8 0

Enthalpy change = energy products -
energy reactants

Standard enthalpy change of a reaction is the energy change when the number of moles of reactant in a reaction react together to form products under standard condition.

Hope it helped!

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Engine size is measured by how much air the cylinders displace. A 1996 Pontiac V8 has an engine size of 316.6 cubic inches. What

inna [77]

The size of this engine in cubic meters is $0.0052 m^{3}$ .

<u>Explanation:</u>

As it is stated that engine size can be measured depending upon the amount of air the cylinders displace, it is also stated that the engine of model Pontiac V8 has a size of 316.6 cubic inches. The problem is to convert the size of engine in cubic meters. We know that 1 inch = 0.0254 m.

Then $1 inch^{3}=(0.0254)^{3} m^{3}$

As here the size of engine is 316.6 cubic inches, then in metres it will be

$316.6 \text { inches }^{3}=316.6 \times(0.0254)^{3} \mathrm{m}^{3}=0.0052 \mathrm{m}^{3}$

Thus, the size of the engine in cubic meters will be $0.0052 m^{3}$ .

3 0

4 years ago

Is the density of gas unaffected by changes in temperature?

ra1l [238]

No it is affected by temperatures .

4 0

4 years ago

Solutions can only be separated by using distillation not filtration. Why can't a solution be filtered? Explain using the terms

garri49 [273]

<h2>Solutions</h2>

Explanation:

Solutions are formed when a solute gets dissolved in a solvent. The solid that gets dissolved is called solute whereas the liquid in which the solid gets dissolved is called the solvent. On dissolving, the particles of the solute gets incorporated between the inter-particle space of the solvent. This means that there is no significant difference between the particle size of solute and solvent. However the boiling points of solutions can differ significantly. This is the reason, the solutions cannot be separated by the method of filtration but by the method of distillation.

5 0

4 years ago

A scientist formulates the following hypothesis: If plants of the same species

Blababa [14]

Answer:

Growth rate

Explanation:

The responding variable, also known as the DEPENDENT VARIABLE, is the variable that responds to changes or manipulations made to another variable (independent or manipulable variable) in the experiment. It is the measured variable of an experiment.

According to the hypothesis provided for this investigation, the scientist wants to determine if the amount of fertilizer plants of the same species receive will affect their growth rate when planted in the same condition. This shows that the independent variable is the amount of fertilizer to be used while the RESPONDING VARIABLE OR DEPENDENT VARIABLE is the GROWTH RATE OF THE PLANTS because it responds to the amount of fertilizer.

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3 years ago

How many grams are in 6.53 moles of Pb

dezoksy [38]

Mr: 207.2
m=n×Mr= 6.53×207.2= 1353.02g

7 0

3 years ago