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3 years ago

6. A box measures 11.25 inches in length, 8.1 inches in width and 6.85 inches in height. What is the

Chemistry

1 answer:

denis23 [38]3 years ago

3 0

Answer:

I'd say 624.2^3 inches.

Explanation:

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What is the purpose of an experiment as a part of the scientific method

sladkih [1.3K]

Answer:

To test the hypothesis

Explanation:

8 0

3 years ago

The balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI is Pb(ClO3)2(aq)+2NaI(aq)⟶PbI2(s)+2NaClO3(aq) What

ryzh [129]

Answer : The mass of $PbI_2$ precipitate produced will be, 9.681 grams.

Explanation : Given,

Molarity of NaI = 0.210 M

Volume of solution = 0.2 L

Molar mass of $PbI_2$ = 461.01 g/mole

First we have to calculate the moles of $NaI$ .

$\text{Moles of }NaI=\text{Molarity of }NaI\times \text{Volume of solution}=0.210M\times 0.2L=0.042moles$

Now we have to calculate the moles of $PbI_2$ .

The balanced chemical reaction is,

$Pb(ClO_3)_2(aq)+2NaI(aq)\rightarrow PbI_2(s)+2NaClO_3(aq)$

From the balanced reaction we conclude that

As, 2 moles of $NaI$ react to give 1 mole of $PbI_2$

So, 0.042 moles of $NaI$ react to give $\frac{0.042}{2}=0.021$ moles of $PbI_2$

Now we have to calculate the mass of $PbI_2$ .

$\text{Mass of }PbI_2=\text{Moles of }PbI_2\times \text{Molar mass of }PbI_2$

$\text{Mass of }PbI_2=(0.021mole)\times (461.01g/mole)=9.681g$

Therefore, the mass of $PbI_2$ precipitate produced will be, 9.681 grams.

6 0

4 years ago

What is the answers to these questions?

serious [3.7K]

2. B

3. B

4. A

5. C

6. B

4 0

3 years ago

What is the difference between the physical and the life sciences? at least 1 sentence pls

hram777 [196]

Answer:

Physical science is concerned with the study of natural, non living objects and life science is about living things.

Explanation:

I had fun answering this question.

5 0

3 years ago

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A reaction contains two reactants, A and B. If A is doubled, there will be a greater number of effective collisions between reac

liubo4ka [24]

Answer:

True

Explanation:

The complete question is:

"A reaction contains two reactants, A and B. If A is doubled, there will be a greater number of effective collisions between reactants. TRUE FALSE"

Collision Theory indicates that chemical reactions take place because molecules, atoms or ions collide with each other.

Furthermore, the molecules must collide effectively, that is, not all reagent collisions lead to product formation. Effective shock means that the reagent molecules have enough kinetic energy at the time of the shock for their bonds to break and product bonds to form. In addition, the molecules of the reagents must be properly oriented for the reaction to take place.

As the concentration increases, the number of shocks increases. In other words, by increasing the concentration of the reactants, the probability of collision between their molecules increases, and therefore the number of effective collisions.So the statement is true-

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3 years ago

Read 2 more answers