The amount of heat transferred from an object depends on which of the following?a. the specific heat of the object
b. the initial temperature of the object
c. the mass of the object
d. all of the above

Answers

Answer 1

Answer:

The amount of heat transferred from an object depends on all of the above".

What is the amount of heat?

The amount of heat is the amount of energy required to convert one unit mass of a constant volume substance by one degree Celsius.

The heat transported to or from a substance is determined by three factors: the change in temperature of the substance, its mass, and certain physical parameters related to the phase of the substance. The energy required to change the temperature of a substance or object is measured by specific heat and heat capacity. The amount of heat received or emitted by a substance is directly proportional to its type, mass, and temperature change.

Hence the correct answer is d.

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Answer 2

Answer: D. All of the above!

When calculating for the amount of heat in an object, you use the following formula:

q = c x m x ΔT

q = amount of heat or heat
c = the specific heat
m = the mass
ΔT = the initial temp.

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How can you tell which ionic compounds will react in an aqueous solution

Answers

1. Determine if the ionic substances can break apart into ions.
- e.g. CaCO3 isn't very soluble, do it can't dissolve and dissociate. If it can't pop apart, no ions.
2. Swap the partners for all the other ions that you can get from step 1. You can skip pairings with the same charge - a + can't get close to another + to react.
3. Use solubility, acid/base, and redox rules to see if anything will happen with the ions in solution.

Why can liquid metal be poured into a block-shaped mold?Describe what happens to the shape and volume of the liquid
metal.

Answers

Answer:

yes

Explanation:

because

What is the maximum mass of glucose (C6H12O6) that can be burned in 10 g of oxygen?

Answers

$C_6H_(12)O_6 + 6 \ O_2 \to 6 \ CO_2 + 6 \ H_2O$
1 mole of glucose : 6 moles of oxygen

First calculate the number of moles of oxygen in 10 g:
$M=32 \ (g)/(mol) \nm=10 \ g \nn=(10 \ g)/(32 \ (g)/(mol))=0.3125 \ mol$

1 mole of glucose reacts with 6 moles of oxygen
x moles of glucose reacts with 0.3125 moles of oxygen
$x=(1 \ mol \cdot 0.3125 \ mol)/(6 \ mol) = (3125)/(60000) \ mol= (5)/(96) \ mol$

Now calculate the mass of 5/96 moles of glucose.
$M=180 \ (g)/(mol) \nn=(5)/(96) \ mol \nm=180 \ (g)/(mol) \cdot (5)/(96) \ mol=(900)/(96) \ g=9.375 \ g$

The maximum mass of glucose that can be burned in 10 g of oxygen is 9.375 g.

18. Which of the following reactions are endothermic or exothermic? Explain your answers. A. When a certain amount of potassium nitrate is dissolved in water, the water temperature drops from 23°C to 18°C. B. Jack cooks himself a steak. C. When cold water is mixed with sulphuric acid, the mixture can rapidly reach the boiling point of water. D. A flare burns up slowly.

Answers

Answer:

The answer to your question is below

Explanation:

An endothermic reaction absorbs heat to proceed.

An exothermic reaction releases heat to proceed.

A. When a certain amount of potassium nitrate is dissolved in water, the water temperature drops from 23°C to 18°C. This is an example of an endothermic reaction because of the temperature diminishes.

B. Jack cooks himself a steak. This is an endothermic reaction because the steak does not cook itself it needs heat to be cooked.

C. When cold water is mixed with sulphuric acid, the mixture can rapidly reach the boiling point of water. This is an exothermic reaction because the temperature of water increases, which means that energy is been released.

D. A flare burns up slowly. I think it is an endothermic reaction because it was supply energy to proceed.

How many moles of water, H2O, contain 2.0×10^22 molecules of water?

Answers

1 mol H₂O ----------- 6.02x10²³ molecules
? mol H₂O --------- 2.0x10²² molecules

Number of moles = Number of molecules / Avogadro's number

moles = 2.0x10²² * 1 / 6.02x10²³

= 2.0x10²² / 6.02x10²³

= 0.3322 moles

hope this helps!

0.500dkg = ?g

HELP PLS!!!!