CHEMISTRY MIDDLE SCHOOL

Given the following reaction: 2 OF2 + 2 S → SO2 + SF4 + 319.5 kJ Is this endothermic or exothermic? Draw the energy pathway:

Answers

Answer 1
Answer:

Answer:

It is an exothermic reaction.

Explanation:

Why? Since the kJ is added to the product side, we know that this is an exothermic reaction since it is releasing heat. Endothermic reactions absorb heat and thus it would be represented on the products side.

To represent this exothermic reaction we would draw a curve starting mid graph then it goes up and then dropsdown. In other words, it looks downhill since it's releasing heat wheras an edothermic rxn, it is gaining heat, thus it looks like it is going upwards.

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Which describes how radiation moves?A:Radiation moves from a cooler object to a warmer object
B:Radiation moves from a warmer object to a cooler object
C:Radiation moves from a warm object to an object of the same temperature.
D:Radiation moves from a cool object to an object of the same temperature

Answers

Hey wademcelroy2005, thanks for submitting your question to Brainly!

The answer to your question is B:Radiation moves from a warmer object to a cooler object

Answer: B

Explanation:LATE IM LATE BUT ITS

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True or False State the correct answer and provide your reasoning

6. Gravity is a force that can be changed. T/F

7. The bigger an object is, the smaller the force of gravity. T/F

8. As one object gets closer to another object, the force of gravity will increase. T/F

9. The Sun has a greater gravitational force than Jupiter. T/F

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6. False, Gravity is a force that cannot be changed
7. False, an object with more mass has more/less gravitational force than an object with a smaller mass. Objects that are closer together have more/less of a gravitational force between them than objects that are further apart. The more separation two objects have, the more the force between them decreases.
8. True, objects that are closer together have more/less of a gravitational force between them than objects that are further apart. The more separation two objects have, the more the force between them decreases. When mass 1 increases the force between the objects increases.
9. False, Jupiter, the fifth planet from the Sun, has the strongest gravitational pull because it's the biggest and most massive.

I hope this helps!!
The answer is 6f 7t 8f 9f

Which best explains why metal cooking utensils often have plastic coating on the handles

Answers

Metal solids contain a positively-charged cation surrounded by a "sea" of delocalised, negatively-charged electrons.

The electrons are able to move freely, and hence transfer kinetic energy throughout the implement at a much quicker rate than non-metals.

Plastic is made of non-metals (Mostly carbon and hydrogen) and therefore is a poor thermal conductor.

Therefore, by coating the metal utensil in plastic, the rate of heat energy transfer to the person in contact's hand is decreased.

Answer:

Plastic reduces the transfer of thermal energy to hands holding the utensils.

Explanation:

Gasoline is a mixture of compounds. A gasoline sample was found to be 2.851% (by mass) octane (C₈H₁₈). 482.6 g of gasoline is combusted to produce gaseous carbon dioxide and gaseous water.Write out the balanced combustion reaction of octane with oxygen gas to form carbon dioxide and water. Submit an image of the balanced reaction.
Show all work.

Answers

Answer:

See below.

Explanation:

The mass of octane in the sample of gasoline is 0.02851 * 482.6 =  13.759 g of octane.

The balanced equation is:

2C8H18(l)  +  25O2(g) ---->  16CO2(g)  +   18H2O(g)

From the equation, using  atomic masses:

228.29 g of  octane forms 704 g of CO2 and 324.3 g of H2O

So the mass of CO2 formed from the combustion of 13.759 g of octane = (704 * 13.759) / 228.29

= 42.43 g of CO2.

Amount of water = 324.3 * 13.759) / 228.29

= 19.55 g of H2O.

Why don’t water and oil mix when the two liquids are poured into the same container?

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The oil always floats to the top because it is less dense than water. oil and water don't mix because water molecules are more attracted to each other than to oil molecules

The nitrogen cycle is completed with the process of what ?

Answers

Answer:

nitrogen fixation

Explanation:

nitrogen fixation is the process through which the nitrogen fixing rhizobium bacteria present in the root nodules of leguminous plants I fixes the nitrogen present in the air into the soil
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