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OLEGan [10]
3 years ago
9

Even the demand for a necessity such as gasoline will respond to a change in price, especially over a longer time horizon. a. TR

UE b. FALSE
Chemistry
1 answer:
Aleks [24]3 years ago
5 0

Answer:

True

Explanation:

The demand and supply of goods and services especially those that are necessities will be influenced by a slight change in price. This is due to the effects of elasticity of demand and supply. Therefore, for the given example (i.e. gasoline), if there is a price change over a considerable period of time, the demand for gasoline will change.

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If all of the energy from burning 281.0 g of propane (ΔHcomb,C3H8 = –2220 kJ/mol) is used to heat water, how many liters of wate
lapo4ka [179]

This problem is providing us with the mass of propane, its enthalpy of combustion, and the initial and final temperature of water that can be heated from the burning of this fuel. At the end, the result turns out to be 42.27 L.

<h3>Combustion:</h3>

In chemistry, combustion reactions are based on the burning of fuels by using oxygen and producing both carbon dioxide and water. For propane, we will have:

C_3H_8+5O_2\rightarrow 3CO_2+4H_2O

Hence, we can calculate the heat released from this reaction by using the mass, which has to be converted to moles, and the given enthalpy of combustion:

Q=281.0g*\frac{1mol}{44.09g}*-2220\frac{kJ}{mol}*\frac{1000J}{1kJ}\\ \\ Q=-1.415x10^7 J

<h3>Calorimetry:</h3>

In chemistry, we can analyze the mass-specific heat-temperature-heat relationship via the most general heat equation:

Q=mC\Delta T

Thus, since Q was obtained from the previous problem, but the sign change because the released heat is now absorbed by the water, one can calculate the mass of water that rises from 20.0°C to 100.0°C with this heat:

m=\frac{Q}{C\Delta T} =\frac{1.415x10^7J}{4.184\frac{J}{g\°C}(100.0\°C-20.0\°C)}\\ \\m=4.227x10^4g

Finally, we convert it to liters as required:

V=4.227 x10^4g*\frac{1mL}{1.00g}*\frac{1L}{1000mL}  \\\\V=42.27L

Learn more about calorimetry: brainly.com/question/1407669

4 0
2 years ago
To separate a mixture of hard candies and marbles, the most efficient method would be
frozen [14]
I think hand picking is best for this case.another method can be done in which first u have melt those candies with marbles.u will hart candy will melt quickly.so,when candies melt ,u will find marbles are still solid but candies are in liquid form .now take a net and purify that solution(candies and marbles).now the candies will pass through net but marbles will stuck in upper net.remove marbles now
6 0
4 years ago
Read 2 more answers
Which statement is also true of the rearrangement of atoms
qwelly [4]

Answer:

In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

Explanation:

5 0
3 years ago
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24. Element X has five valence electrons, element Y has one valence electron, and element Z has one valence electron. Which two
natka813 [3]
Elements Y and elements Z would have similar properties due to the fact that they both posses the same number of valence electrons. They both have a single valence electron that determines the corresponding elements bonding properties and the fact that it can either donate 1 valence electron to produce an ion that would be attracted to another atom, that is also an ion. Assuming that these elements are group 1 elements, they do not undergo in covalent bonding.
3 0
3 years ago
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Four states or phases of matter
Pie

Answer:

Solid, Liquid, Gas and, Plasma

Explanation:

A solid has a definite shape and volume. A liquid has a definite volume but takes the shape of its container. A gas lacks either a defined shape or volume. Plasma is similar to a gas in that its particles are very far apart, but gas is electrically neutral and plasma has a charge.

5 0
3 years ago
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