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FrozenT [24]
3 years ago
5

UNDERSTANDING CONCEPTS-Fill in the Blanks:

Chemistry
1 answer:
igomit [66]3 years ago
6 0

Answer:

17 decrease

18 increase

19 increase

20 decrease

Explanation:

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How many significant figures does 2.0 x 10² have?​
Masteriza [31]

Answer:

Two sig figs

Explanation:

Non-zero integers always count as sig figs (the 2 before the decimal point), and any trailing zeros at the right end of the number are significant only if there is a decimal point (in this case, the 0 is significant). Therefore, there are 2 sig figs in 2.0 x 10^{2}

6 0
3 years ago
Which situations will NOT increase the reactions rate of most chemical reactions?
jenyasd209 [6]

Answer:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

Explanation:

Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants

5 0
3 years ago
Which force is activated because of the mass of the airplane and works to pull an airplane to the ground?
12345 [234]

i think its gravity

5 0
3 years ago
Read 2 more answers
Which phrases accurately describe acids? Check all that apply.
weqwewe [10]

Answer: Option 1, 4 and 5 describe acids accurately.

Explanation:

Option 1: Acids have a sour taste because of the concentration of H^+ ion.

Option 2: They are corrosive in nature, that is they are not at all gentle with the skin and fabric as some acids intend to burn skin such as H_2SO_4 is a strong acid which can burn skin as well as fabric.

Option 3: Acids need electrons to release H^+ ions and non-metals do not donate electrons hence, there is no reaction between a non-metal and an acid.

Option 4: All acids do contain hydrogen. They dissociate in the presence of water to produce H^+ ions.

                                 HCl\overset{H_2O}{\rightarrow} H^++Cl^-

Option 5: Acids do conduct electricity that is they carry electrical charges. This was explained by Arrhenius. He said that the acids dissociate into H^+ions, when it is dissolved in water. These ions hence acts as charge carriers in water.

8 0
3 years ago
Read 2 more answers
Why does oil floats on water?​
pashok25 [27]

Answer:

it depends on density which causes oil to float on water

Explanation:

imagine wearing socks soaked oil and walked in water :0

7 0
3 years ago
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