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n200080 [17]
3 years ago
7

Please HELP.............................

Chemistry
1 answer:
Zanzabum3 years ago
3 0

Answer:

14. Mirror is made up of a very smooth surface, whereas wall is not made up of a smooth surface. Smooth surfaces reflect the incident light to more extent, where as rough surfaces absorb most of the incident light. Hence, the reflected light from walls can't form the image and wall can't act as a mirror.

15. Correct answer is d) About four years

16. Correct answer is b) Convex lens

Explanation:

15. If the light from the nearest star (Alpha Centauri) takes more than 4 years to reach us, we're seeing that star 4 years in the past.

16. Refracting telescopes use convex lenses, at the front of a tube, to gather and focus incoming light. The image formed is magnified for the viewer through an eyepiece lens at the back end of the tube.

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The diagram shows two samples of gas enclosed in identical containers. Each colored ball represents a gas particle. Both samples
Natali5045456 [20]

Answer:

Sample B

Explanation:

When heat is added to a substance, the molecules and atoms vibrate faster. Since the speed for Sample B is higher this means it has a higher temperature as well.

7 0
3 years ago
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What does conserving mass mean in a chemical equation?
Keith_Richards [23]
The answer would be C. Hope this helps
4 0
3 years ago
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For the reaction 3h2(g) + n2(g) 2nh3(g), kc = 9.0 at 350°c. calculate g° at 350°c.
miss Akunina [59]
When ΔG° is the change in Gibbs free energy

So according to ΔG° formula:

ΔG° =  - R*T*(㏑K)

here when K = [NH3]^2/[N2][H2]^3 = Kc 

and Kc = 9 

and when T is the temperature in Kelvin = 350 + 273 = 623 K

and R is the universal gas constant = 8.314 1/mol.K

So by substitution in ΔG° formula:

∴ ΔG° = - 8.314 1/ mol.K * 623 K *㏑(9)

           = - 4536 
4 0
3 years ago
PLEASE HELP ME ANSWER
ELEN [110]
It’s metric system dude
3 0
3 years ago
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Glade air freshener gel “disappearing” is an example of
netineya [11]

Answer:

Vaporization

Explanation:

Vaporization is the change of a specie to the gaseous state. To 'disappear' in this case simply means to change to the gaseous state.

Substances with high vapour pressure tend to be easily converted to vapour phase. Hence if Glade air freshener gel 'disappears' easily, then it has a high vapour pressure and is easily converted to vapour (gas).

8 0
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