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3 years ago

An element that speeds up chemical reactions is called a/an

1 answer:

7 0

I think it is enzymes.Inside our body most of the chemical reactions are speeds up by enzymes.These enzymes decreases the minimum energy that is required for the reaction to happen. ;-]. Actually it works like a catalyst.

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When the molecules in a body move with increased speed,it's possible that the body will change from a

aleksandrvk [35]

Answer:

C. liquid to a gas

Explanation:

I know this is right but I don't have an explanation

4 0

3 years ago

Partial charges will exist on each atom when a bond exists between two atoms with different electronegativities. Since the atom

lana66690 [7]

Answer:

negative, positive, increase

Explanation:

From the given question,

During the formation of bond, between two atoms with difference between their electronegativity-

The more electronegative atom, will pull the electrons towards itself , and hence acquires a partial negative charge,

And,

The less electronegative atom, will acquire a partial positive charge.

The more the difference between the electronegativity of the atoms, the more would be the magnitude of partial charge.

And, the less would be the difference between the electronegativity of the atoms, the lesser would be the magnitude of partial charge.

7 0

2 years ago

Every Sunday, Sarah prepares blue fruit punch to

MrRissso [65]

Answer:

Fruit punch with a very dark blue color

Explanation:

8 0

3 years ago

Read 2 more answers

If 27.3% of a sample of silver-112 decays in 1.52 hours, what is the half-life (in hours to 3 decimal places)?

ICE Princess25 [194]

<u>Answer:</u> The half life of the sample of silver-112 is 3.303 hours.

<u>Explanation:</u>

All radioactive decay processes undergoes first order reaction.

To calculate the rate constant for first order reaction, we use the integrated rate law equation for first order, which is:

$k=\frac{2.303}{t}\log \frac{[A_o]}{[A]}$

where,

k = rate constant = ?

t = time taken = 1.52 hrs

$[A_o]$ = Initial concentration of reactant = 100 g

[A] = Concentration of reactant left after time 't' = [100 - 27.3] = 72.7 g

Putting values in above equation, we get:

$k=\frac{2.303}{1.52hrs}\log \frac{100}{72.7}\\\\k= 0.2098hr^{-1}$

To calculate the half life period of first order reaction, we use the equation:

$t_{1/2}=\frac{0.693}{k}$

where,

$t_{1/2}$ = half life period of first order reaction = ?

k = rate constant = $0.2098hr^{-1}$

Putting values in above equation, we get:

$t_{1/2}=\frac{0.693}{0.2098hr^{-1}}\\\\t_{1/2}=3.303hrs$

Hence, the half life of the sample of silver-112 is 3.303 hours.

6 0

3 years ago

What type of physical weathering is caused by the expansion of water?

skelet666 [1.2K]

Answer:

wedging

Explanation:

ice or frost wedging

6 0

2 years ago