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NikAS [45]
3 years ago
9

Earth and the Solar System: Phenomena:

Chemistry
1 answer:
Step2247 [10]3 years ago
4 0
............................1
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45.5 g of ice is heated from -25 degrees celsius to 150 degrees celcius. Calculate the total amount of heat required for the ent
tino4ka555 [31]

Answer:

Q = 16163.88 Joules

Explanation:

Given the following data;

Initial temperature, T1 = -25°C

Final temperature, T2 = 150°C

Mass = 45.5 g

Specific heat capacity of ice = 2.03 J/g°C

To find the quantity of heat required;

Heat capacity is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 150 - (-25)

dt = 150 + 25

dt = 175°C

Substituting into the formula, we have;

Q = 45.5 * 2.03 * 175

Q = 16163.88 Joules

4 0
3 years ago
O The Arrhenius Model of acids and bases applies toward substances that are nonaqueous.O The Arrhenius Model of acids and bases
Alex

ANSWER

Option A

EXPLANATION

Arrhenius defines an acid as a substance that will produce hydrogen ions as the only positive ion when dissolved in water.

He also defines a base as a substance that contains a hydroxide ion (OH^-).

Hence, the Arrhenius Model of acids and bases applies that is applied to the aqueous solution.

The correct answer is option A

4 0
1 year ago
A target is shielded from a radioactive sample by a sheet of metal. What kind of radiation can pass through the sheet of metal
White raven [17]

Answer:

gamma rays only is the correct answer.

Explanation:

Every radiation has different penetrating power to penetrate in materials and the flow of particles through a material is called penetration power.

Penetrating power of the gamma rays is very high because it has no mass and charges that the reason it can travel far in the air than beta particles and alpha particles.

Alpha particles can be blocked by paper and beta particles can  easily passes through  paper but it cannot pass through aluminum sheet whereas gamma particles are hardest to blocked, gamma particles can be blocked by heavy shielding.

Thus the radiation can pass through sheet of metak and hit the target is only gamma rays.

4 0
3 years ago
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Brass is a solid solution composed of zinc and copper. Brass is classified as a (n): A.colloid B.suspension C.solution D.alloy
melamori03 [73]
Brass is an alloy, or a combination of two (or more) metals.
4 0
4 years ago
At its boiling temperature, the particles of a liquid are moving so slowly that they begin to form regular patterns. true or fal
mihalych1998 [28]
False. Do I need to elaborate? Ill do so in the comment below
4 0
3 years ago
Read 2 more answers
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