3 years ago

Make a general statement about the reactivity of the metals in this experiment.

1 answer:

3 0

Transition metals seem to have fairly even levels of reactivity though it seems they to react more with bases than acids. If I didn’t know from the lessons, I would say alkali and alkaline earth metals weren’t very reactive.

(That's my answer when I did a lab about the reaction of metals for chemistry at least.)

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Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (6.0 x 1

Greeley [361]

I believe the correct answer from the choices listed above is the second option. The expression (6.0 x 104) (3.1 x 10-1) is equal to 1.9 x 10^4. We only have two significant figures from the starting expression that is why we rounded of the product from 1.86 to 1.9.

3 0

3 years ago

How many atoms are in 1.204x10^22 moles of arsenic?

ra1l [238]

Answer:

<h2>0.02 moles </h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

$n = \frac{1.204 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.02$

We have the final answer as

<h3>0.02 moles</h3>

Hope this helps you

7 0

3 years ago

The following is an example of which type of chemical reaction?AgNO3 (aq) + NaCl (aq) --> AgCl (s) + NaNO3 (aq)

OLEGan [10]

Notice that the metals trade places. That means it is a double replacement RXN or C

4 0

3 years ago

What is the h+ concentration for an aqueous solution with poh = 3.53 at 25 ∘c?

MrMuchimi

POH+pH=14
pH=14-pOH=14-3.53=10.47
pH=-log[H⁺]
[H⁺]=10^(-pH)
[H⁺]=10^(-10.47)=3.4*10(^-11)

7 0

4 years ago

______________ yield about 4 kcal/g when completely oxidized, whereas ___________ yield about 9 kcal/g.

Aleks [24]

Proteins and carbohydrates <span>yield about 4 kcal/g when completely oxidized, whereas fats yield about 9 kcal/g.</span>

3 0

3 years ago