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yarga [219]
4 years ago
9

Help Me Please I would really appreciate it!!!!

Chemistry
1 answer:
QveST [7]4 years ago
6 0

Answer:

How much sunlight each flashlight gets (or doesn't get)  

Explanation:

The independent variable is the variable that the investigator changes.  

You are controlling the amount of sunlight each flashlight gets (or doesn't get).

B is wrong. The amount of decay is the dependent variable.

C is wrong. The type of plastic should be a controlled variable.

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You place air in a sealed can at standard temperature and pressure (STP). You double its absolute temperature (K) while leaving
AnnZ [28]

Answer:

Pressure will double

Explanation:

Gay - Lussac Law => P ∝ T with volume and mass held constant.

=> P₁/T₁ = P₂/T₂ => P₂ = P₁T₂/T₁

T₂ = 2T₁

P₂ = P₁(2T₁)/T₁ = 2P₁

Double absolute temperature => double pressure

7 0
3 years ago
Use the information below to explain why the atomic radius decreases down a group.
notsponge [240]

Answer:

Detail is given below

Explanation:

Atomic radii trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.

In A we can see that there is one positive charge and force of attraction is 2.30×10⁻⁸ N and distance is 0.10 nm

In B we can see that negative charge is further away from nucleus because of greater distance thus force of attraction will be less. 0.58×10⁻⁸ N

In C this distance further increases and force also goes in decreasing 0.26×10⁻⁸ N.

3 0
3 years ago
I need help on my chemistry quiz
slamgirl [31]

Answer:

it could be 25degrees c... not sure

4 0
3 years ago
Can u pls help me with this question ​
lorasvet [3.4K]

Answer:

b i im pretty sure or a

Explanation:

f y bib0f84f69g85

8 0
3 years ago
Arrange the steps in order to describe how photons and carbon dioxide contribute to the warming of earth
adell [148]

Answer:

The steps are arranged in the following order, describing how carbon dioxide and photons  impact the earth's warming.

Explanation:

The sequence is in the following order;

  1. The sun radiated sunlight (visible) photons
  2. Photons from the sun strike the earth and become infrared photons
  3. Earth radiates infrared photons into the atmosphere
  4. CO2 in the atmosphere absorb infrared photons
  5. CO2 in the atmosphere emit infrared photons back towards earth

Carbon dioxide (CO2) molecules can absorb energy from infrared (IR) radiation. Due to vibrations caused by this absorption, the CO2 molecules later release extra energy by emitting another infrared photon.

This ability of CO2 molecules to absorb and re-emit infrared energy is what makes it an effective heat-trapping greenhouse gas.

5 0
4 years ago
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