CHEMISTRY MIDDLE SCHOOL

The corner where a perfume is initally sprayed has:A. Has no concentration of pefume particles.
B. the process of diffusion.
c. a lower concentration of perfume particles the the other corners of the room.
D. a higher concentration of perfume particles the the other corners of the room.

Answers

Answer 1
Answer: Answer D; if you spray perfume into a corner, it will eventually diffuse, but initially it has a higher concentration than all other corners of that room.
Answer 2
Answer: D. Since its initially sprayed there, it takes awhile to move to the areas of lower concentration, so for a while, it will have the highest

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Calculate the number of moles in:- 32 gram of water

when heated, the temperature of a water sample increased from 15 degrees celsius to 39 degrees celsius. It absorbed 4300 joules of heat. What is the mass, in grams, of the sample?

Answers

Mass of water: 43 g

Explanation:

When a substance is heated, the temperature of the susbtance increases according to the equation:

Q=mC\Delta T

where

Q is the amount of heat supplied to the substance

m is the mass of the substance

C is the specific heat capacity of the substance

\Delta T is the increase in temperature

In this problem, we have:

Q = 4300 J is the heat absorbed by the water

C = 4200 J/gC is the specific heat capacity of water

\Delta T = 39-15 = 24^(\circ)C is the increase in temperature

By re-arranging the equation, we can find the mass:

m=(Q)/(C \Delta T)=(4300)/((4200)(24))=0.043 kg = 43 g

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Final answer:

The mass of the water sample can be calculated using the formula for heat absorption: Q = mcΔT.

Given that the water sample absorbed 4300 joules of heat and the temperature increased from 15°C to 39°C, the mass of the water sample is approximately 43.03 grams.

Explanation:

This physics problem can be solved by using the formula for heat absorption:

Q = mcΔT,

where Q is the heat absorbed (in joules), m is mass (in grams), ΔT is the change in temperature (in °C) and c is the specific heat capacity. For water, c is 4.186 joules/gram°C.

The change in temperature (ΔT) of the water sample is the final temperature (39°C) minus the initial temperature (15°C), which equals 24°C.

Using the given value for Q (4300 joules), we rearrange the formula to calculate m (mass):

m = Q / (cΔT) = 4300 / (4.186*24) ≈ 43.03 grams.

Thus, the mass of the water sample is approximately 43.03 grams.

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What are hydrocarbon?

Answers

It's basically just a compound of Carbon and Hydrogen 
a compound of hydrogen and carbon, such as any of those that are the chief components of petroleum and natural gas

Sodium inside a star is most likely formed by which process?fusion


beta emission


alpha emission


fission

Answers

Answer: A: fusion

Ex:

Explain whether smoke filling up a room is diffusion or not.

Answers

yes it is diffusion ..
explanation :
 diffusion is the movement of particles from high concentration to low concentration .. 
as the smoke rises at one corner of the room soon it spreads all over the room which is simply diffusion ..
Yes this is diffusion because diffusion is the movement of particles from high concentration to low concentration, so when smoke go up in one corner then the smoke goes all over the room which is diffusion.

What does the arrow mean in a chemical equation?

Answers

A reactionarrow simply indicates that something has changed and that one thing has become another.

What is a chemical reaction?

A chemicalreaction is a process that converts one or more substances, known as reactants, into one or more different substances, known as products.

Chemical elements or compounds are examples of substances. A chemical reaction rearranges the constituent atoms of the reactants to produce various products.

The most important characteristics of events occurring in the universe are chemical reactions.

Plants grow, fruit development, and biodegrade towards becoming rich in nitrogen for new plants through chemical reactions.

Humans along with all other animals reproduce, digest, grow, heal, and think as a result of chemical reactions.

The arrow connects the old and new things (the thing that formed). An equation of reaction employs the reactionarrow. The reactant is the thing that reacted.

Thus, this is the chief meaning of the arrow in a chemicalreaction, the it shown the reactants combined to form products.

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I believe it means yield or equal

Hope this helps!

If light has a frequency of 2.4 x 10 to the 14th Hz what is it’s wavelength?

Answers

The equation we need to use to solve this is: c=λν

c is the speed of light (2.998 x 10^8 m/s)

λ is the wavelength, which we're gonna solve for

ν is the frequency ( 2.4 x 10^14 Hz )

First, plug in the values we were given into the equation

2.998 x 10^8 m/s= (λ)(2.4 x 10^14 Hz)

Next, divide both sides of the equation by 2.4 x 10^14 Hz to solve for the wavelength (λ)

λ= 1.249166667 x 10^-6 m

Round to 2 significant figures

λ= 1.2 x 10^-6 m
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