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3 years ago

Drag the tiles to the correct locations. The tiles can be used more than once.

Chemistry

2 answers:

TiliK225 [7]3 years ago

7 0

1. Increases
2. Decreases
3. Increases
4. Decreases
5. Decreases
6. Increases

Hope this helps!

Art [367]3 years ago

7 0

Answer: The picture below represents which are more likely to be eroded and which are less.

Explanation: Rocks that are comprised of resistant minerals like quartz, prevailing in a moderately dry environment and which lacks in fractures and pores are least prone to weathering. For example, quartzite.

And those rocks that are weak, contains pores spaces and located within a stream or river channel, are more prone to weathering and erosion. Example, sandstone.

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For a solar eclipse to occur which of the following alignments is necessary? A. The moon is located along a straight line betwee

Aloiza [94]

For a solar eclipse t occur;

C. The moon is located from a line between the sun and earth

8 0

3 years ago

How much heat (in kJ) would need to be removed to cool 150.3 g of water from 25.60°C to -10.70°C?

olga_2 [115]

Answer:

Q = -22.9 kJ

Explanation:

Given that,

Mass of water, m = 150.3 g

Water gets cool from 25.60°C to -10.70°C.

The specific heat of water, c = 4.2 J/g°C

The formula for heat needed is given by :

$Q=mc\Delta T\\\\Q=150.3\times 4.2 \times (-10.7-25.6)\\\\Q=-22914.738\\\\or\\\\Q=22.9\ kJ$

So, 22.9 kJ of heat is needed to be removed to cool.

8 0

3 years ago

At a depth of 40 m, the water pressure is 500 kPa. A diver breathing air (78% N2, 21% O2) at this depth would have what partial

UkoKoshka [18]

We are given with the composition of the air inside a breathing apparatus which is
78% N2
21% O2

The total pressure at a given depth is 500 kPa
The partial pressure of oxygen is
500 kPa (0.21) = 105 kPa

6 0

4 years ago

Which of these is an indication that a chemical reaction has occurred? (boiling of a substance ,freezing of a substance, formati

Readme [11.4K]

Answer:

Boiling of a substance

Explanation:

When something is boiled, heat is released to the surrounding, making it an exothermic reaction (a type of chemical reaction)

8 0

3 years ago

Read 2 more answers

Which of the following substances would you predict to have the highest DHvap? Group of answer choices CH3CH2CH2CH3 CH3CH2OH HF

Katyanochek1 [597]

Answer:

a) $CH_3CH_2CH_2CH_3$

Explanation:

In this question we have the following answer choices:

a) $CH_3CH_2CH_2CH_3$

b) $CH_3CH_2OH$

c) $HF$

d) $CH_3Cl$

e) $HOCH_2CH_2OH$

We have to remember the relationship between intermolecular forces and vapor pressure. If we have stronger intermolecular forces we will have less vapor pressure because the molecules have more interactions between them, so, the molecules will prefer to stay in a liquid state rather than a gaseous state. Now, we have to check each molecule:

a) $CH_3CH_2CH_2CH_3$ (Van der waals interactions)

b) $CH_3CH_2OH$ (Hydrogen bonding)

c) $HF$ (Hydrogen bonding)

d) $CH_3Cl$ (Dipole-dipole interaction)

e) $HOCH_2CH_2OH$ (Hydrogen bonding)

For molecules b, c and e we have hydrogen bond to a heteroatom (O, N, S, or P). In this case oxygen, therefore we will have hydrogen bonding interactions (a very strong interaction). So, we can discard these ones.

In molecule e, we have "Cl" bond to a "C" therefore we will have the presence of a dipole (due to the electronegativity difference). If we have a dipole, we will have a dipole-dipole interaction (a strong interaction, less than hydrogen bonding but still is a strong interaction).

In molecule a, we have only Van der Waals interactions because in this molecule we have only carbon and hydrogen atoms bonded by single bonds. So, we will have a non-polar molecule. These interactions are the weakest interactions of all the molecules given. So, if we have weaker interactions the molecules can be converted to a gas state more easily and we have more vapor pressure. 

7 0

3 years ago