Based on Figure 2, which statement best describes what happens to the amount of matter in the reaction?

Chemistry

1 answer:

scoray [572]2 years ago

8 0

Answer:15 +18

Explanation:15 fuel +18 oxygen + 33 cd

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The heat equation, as given in the introduction, can also be rearranged to calculate the mass or temperature change for a substa

notka56 [123]

Answer:

The correct answer is 281.39 grams.

Explanation:

To arrive at this answer you must first keep in mind the basic equation:

Q = m*Cp* ΔT

Now, in order to calculate the necessary aluminum mass that absorbs 2138 J when passing from 14.83 to 23.31 ° C you must "clear" m of the previous equation.

This means, leave only the mass on one side of the equation, and "pass" Cp and ΔT to the other side dividing Q. This would look like this:

m= Q/ (Cp*ΔT)

Then, you need the value of specific heat of aluminum in the correct units, that is J / g ° C, the approximate value is 0.896.

ΔT is calculated by doing the mathematical operation:

23.31 °C - 14.83 °C = 8.48 °C

Finally, the values of: Q (data provided in joules), Cp (J / g ° C) and ΔT (calculated in ° C) are replaced in the last equation and the mass (in grams) is calculated resulting in 281.39 grams.

3 0

4 years ago

What is the density ρh of hot air inside the balloon? assume that this density is uniform throughout the balloon. express the de

enyata [817]

Answer 1) : The density of the hot air inside the balloon can be found out by using ideal gas equation;

PV = nRT;

As n is number of moles and in gases, number of moles along with mass per mole is equal to the density of the gas.

If the moles in the gas are more the density will be more.

here, density (ρ) = mass (m) / volume (V); substituting in the ideal gas equation we get,

ρ = mP / RT

Answer 2) ρ (hot air) = ρ (cold air) X $\frac{T_{h}}{T_{c}}$