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Romashka-Z-Leto [24]
3 years ago
9

If a(n) ___ ended question is too challenging, respondents will abandon the survey

Chemistry
1 answer:
Colt1911 [192]3 years ago
3 0

Answer:

Open ended question

Explanation:

Built different :]

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a substance that changes the rate of the reaction and is not consumed in the reaction 1 catalyst 2. a uniform mixture of molecul
umka21 [38]

Answer by YourHope:


Hi! :)


Answers:


A catalyst is a substance that changes the rate of the reaction, and is not consumed in the reaction!


A solution is a uniform mixture of molecules or ions of one substance in another!


A solute is the substance dissolved in a solution!


A solution is the substance that does the dissolving in a solution!


Have a BEAUTIFUL day~

4 0
3 years ago
Read 2 more answers
Question 1 A student made measurements on some electrochemical cells and calculated three quantities: The standard reaction free
Zinaida [17]

Answer:

Explanation:

for spontaneous reaction,

ΔG is negative

K>1

E > 0

cell A:

ΔG and EO suggests that reaction is spontaneous. But K is less than 1.

Hence K is wrong

cell B:

ΔG and EO suggests that reaction is non spontaneous .But K is greater than 1.

Hence K is wrong

cell C:

E and K suggest than reaction is non spontaneous but ΔG suggest that reaction is spontaneous.

Hence ΔG is wrong

4 0
4 years ago
Read 2 more answers
Which of the following are cations? Check all that apply.
Lostsunrise [7]

Answer:

a

barium

b

calcium

e

aluminum

f

magnesium

g

copper

Forms cation

Explanation:

4 0
3 years ago
Which of the following substances has been determined to pose the most significant potential threat to human health in terms of
qwelly [4]

Answer:

Polycyclic aromatic hydrocarbons (from petroleum)

Explanation:

Polycyclic aromatic hydrocarbons (PAH) is a group of compounds which contain more than one aromatic ring. Typically examples include; naphthalene, anthracene, phenanthrene etc.

PAH are present in petroleum products. Almost everyone is regularly exposed to vehicles or other equipments that uses petroleum products as fuel. PAH is usually released from the combustion engine of these equipments and may be inhaled by humans. Thus there is a very high risk of PAH exposure compared to other items listed in the question.

PAHs are known to cause different kinds of cancer and other types of health issues in the body. The most disturbing toxicity of PAH is its carcinogenicity which makes it a very serious potential health risk for humans exposed to it on regular basis.

6 0
3 years ago
A chemical change involves the formation or the breaking of bonds. true or false
dusya [7]
The answer would be true.
5 0
3 years ago
Read 2 more answers
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