3 years ago

Please help me with this! I’ll mark you brainiest if it’s correct. I do know it’s either A or C

Chemistry

2 answers:

8090 [49]3 years ago

8 0

It is A
I only know that Lithium does not have Roman numerals after it only certain elements do so yea!

Volgvan3 years ago

6 0

Answer:

the correct answer is A

Explanation:

You might be interested in

Even though lead is toxic, lead compounds were used in ancient times as white pigments in cosmetics. What is the percentage of l

Gekata [30.6K]

Answer: The mass percent of lead in lead (IV) carbonate is 63.32 %

Explanation:

The given chemical formula of lead (IV) carbonate is $Pb(CO_3)_2$

To calculate the mass percentage of lead in lead (IV) carbonate, we use the equation:

$\text{Mass percent of lead}=\frac{\text{Mass of lead}}{\text{Mass of lead (IV) carbonate}}\times 100$

Mass of lead = (1 × 207.2) = 207.2 g

Mass of lead (IV) carbonate = [(1 × 207.2) + (2 × 12) + (6 × 16)] = 327.2 g

Putting values in above equation, we get:

$\text{Mass percent of lead}=\frac{207.2g}{327.2g}\times 0100=63.32\%$

Hence, the mass percent of lead in lead (IV) carbonate is 63.32 %

4 0

3 years ago

What happens when a catalyst is used in a chemical reaction? The reaction rate increases. The reaction rate decreases. The react

topjm [15]

Catalysts speed up a reaction so it would be the reaction rate increases.

8 0

3 years ago

Read 2 more answers

In 1928, 47.5 g of a new element was isolated from 660 kg of the ore molybdenite. the percent by mass of this element in the ore

vitfil [10]

To take the percent by mass of this element, we use the formula:

% mass = (mass of element / mass of ore) * 100%

% mass = (47.5 g / (660 kg * 1000 g / kg)) * 100*

% mass = 7.20 x 10^-3 %

8 0

3 years ago

Read 2 more answers

Finally, it is time to return to Earth and review how scientists here classify organisms:

lilavasa [31]

5. Eubacteria

6. Plantae

7. Animalia

8. Protist (technically not a kingdom)

9. Archaebacteria

10. Fungi

6 0

3 years ago

What part

-BARSIC- [3]

Answer:

What arrow????

6 0

3 years ago