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jasenka [17]
3 years ago
15

Explain why the first ionisation energy of krypton is greater then the first ionisation energy of bromine

Chemistry
1 answer:
MrMuchimi3 years ago
3 0

Answer:

Kr has one more electron than br and so, the nuclear charge increase, which means the nuclear attraction between the nucleus and outer most electron will increase and so will be harder to remove the electron from Kr than Br, so Kr has higher 1st ionisation.

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A first-order reaction has a rate constant of 0.33 min-1. it takes __________ min for the reactant concentration to decrease fro
inna [77]
The first order reaction is when the rate of the reaction is directly proportional to the concentrations of one of the reactants.
if the reactant whose concentration determines the rate - N
rate equation is 
rate = k [N]¹
where k - rate constant 
the differential equation is as follows;
[N] = [N₀] e^ (-kt)
where N - concentration after t minutes
N₀ - concentration when t = 0 minutes 
k -rate constant 
t - time taken in minutes 
substituting the values given following equation is obtained 
0.088 m = 0.13 e^ (-0.33 *t)
e^ (-0.33 *t) = 0.088/ 0.13
       -0.33t      = ln 0.676
       - 0.33t     = -0.39
                t = 1.18 minutes
it takes 1.18 minutes for reactant concentration to decrease from 0.13 m to 0.088 m

3 0
3 years ago
Mass of CuSO4● XH2O (g) = 1.6 grams BEFORE HEATING
Leokris [45]

0.06105 moles is the number of moles of water lost.

<h3>What is molar mass?</h3>

Molar mass is defined as the mass in grams of one mole of a substance.

Given data:

Mass of water = 1.1g

Molar mass water = 18.016 g/mol

Moles of water =?

These quantities are related by the following equation;

Moles = \frac{Mass}{Molar \;mass}

Substituting the values of the quantities and solving for moles, we have;

Moles =  \frac{1.1 }{18.016} = 0.06105 moles.

Hence, the 0.06105 moles is the number of moles of water lost.

Learn more about molar mass here:

brainly.com/question/12127540

#SPJ1

7 0
2 years ago
What is the mass of 0.251 moles of water? Using dimensional analysis show work
AVprozaik [17]

1 \text{ mol of H}_2 \text{O} \equiv 18 \text{ g} \implies 0.251  \text{ moles of H}_2 \text{O} \equiv 4.518 \text{ g}

3 0
3 years ago
Activation energy is the amount of energy required to__________.
asambeis [7]

Answer:

Activation energy is the amount of energy required to convert the reactants into the activated complex (option B)

Explanation:

The activation energy is the minimum needed energy to make a reaction occurs. When the reaction occurs, the molecules of reactants joins together in a determined position, so when they bond all the molecules reactants, they make the activated complex. That's why we say, that the energy needed to make the molecules of reactants form the activated complex is finally the <em>activation energy</em>.

When the activated complex is formed, there is a few moment with all the molecules from reactants bonding together. By the end, they are separated so the products are been formed.

8 0
4 years ago
Which solution contains the biggest amount of chloride ions?
Katen [24]

Answer:

the quantity of solution to moles for d is significantly lower.

Explanation:

the larger the amount of liquid, the less amount of ions to dissociate hence having a lesser amount of chloride ions.

compared to b which is less liquid and a higher concentration

4 0
3 years ago
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