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2 years ago

How might differences in the volumes of individual reactants applied in a test influence a

1 answer:

3 0

Converting the number of reactants affects the number of products produced in a chemical reaction. In a chemical reaction, the most effective atoms present in the reactants can come to be in the products. Mass is conserved in a chemical response.

If the floor area to volume ratio of a reacting stable is progressed: more reactant particles are uncovered on the ground. the frequency of collisions amongst reactant debris will increase. consequently, the rate of reaction will grow.

Catalysts always accelerate a chemical change. they're materials that participate in a chemical response by increasing the price of response however are unchanged via the reaction itself. Growing the eye of 1 or more reactants will frequently boom the charge of the response. This takes place due to the fact a higher interest in a reactant will motivate greater collisions of that reactant in a selected time period.

Learn more about chemical change here:-brainly.com/question/1222323

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The experimental procedure has you wash your thermometer and dry it after you measure the temperature of the acid and base solut

trapecia [35]

If you don't wash the thermometer, residual NaOH will react with the HCl solution. This is a highly exothermic reaction and will change the temperature of the solution, and thus throw off your measurement.

4 0

3 years ago

Gerry is looking at an unknown element. He knows it has 1 valence electron and is highly reactive with water. What group is the

SVEN [57.7K]

Answer:

Group 1

because they have just one valance electron, group 1 elements are very reactiv.

4 0

3 years ago

A chemist needs 10 liters of a 25% acid solution. The solution is to be mixed from three solutions whose concentrations are 10%,

mojhsa [17]

Answer:

a) 1 litre of 10% solution and 7 litre of 20% solution

b) 1.67 litres of 50% solution and 8.33 litres of the 20% solution

c) 3.75 litres of 50% solution and 6.25 litres of 20% solution

Explanation:

Given:

chemist needs = 10 liters of a 25% acid solution

Concentration of three solutions that are to be mixed = 10%, 20% and 50%.

Solution:

A) Use 2 liters of the 50% solution

Let us mix this with 10% and 20% solution

They will have to equal 8 litres

Let x=20% solution

Then (8-x) =10%

So the equation becomes,

10%(8-x)+ 20%x+50%(2)=25(10)

(0.1)(8-x) +0.2x+0.50(2)= 0.25(10)

0.8-0.1x+0.2x+1.0=2.5

0.2x-0.1x=2.5-0.8-1.0

0.1x=0.7

$x=\frac{0.7}{0.1}$

x= 7

so, 8-x = 8 -7= 1 litre of 10% solution and 7 litre of 20% solution

B)Use as little as possible of the 50% solution

Let x be the amount of 50% solution.

Then(10-x) be the 20% solution

Now the equation becomes,

50%(x)+20%(10-x)=25%(10)

0.50x+0.2(10-x)=0.25(10)

0.5x+2.0-0.2x=2.5

0.3x=2.5-2.0

0.3x=0.5

$x=\frac{0.5}{0.3}$

x=1.67

now (10-x)=(10-1.67)=8.33

so there will be 1.67 litres of 50% solution and 8.33 litres of the 20% solution

c) ) Use as much as possible of the 50% solution

Let x be the amount of 50% solution.

Then(10-x) be the 20% solution

Now the equation becomes,

50%(x)+10%(10-x)=25%(10)

0.50x+0.1(10-x)=0.25(10)

0.5x+1.0-0.1x=2.5

0.4x=2.5-1.0

0.4x=1.5

$x=\frac{1.5}{0.3}$

x=3.75

Now, (10-x)=(10- 3.75)=6.26

So there will be 3.75 litres of 50% solution and 6.25 litres of 20% solution

5 0

3 years ago

Object is irregularly shaped solid and it is dropped into a graduated cylinder and it displays 25 mL of water and has a mass of

Blababa [14]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume}\\$

From the question

mass = 30 g

volume= 25 mL

We have

$density = \frac{30}{25} \\ = 1.2$

We have the final answer as

Hope this helps you

7 0

3 years ago

What is a valence electron and why are they so important to a chemist?

Reika [66]

They are important because they are the electrons that help the atom to bond with another atom. They are in the outer most shell. ☺️

3 0

3 years ago