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ratelena [41]
3 years ago
5

What events caused the formation of most islands in the South Pacific?

Chemistry
1 answer:
WINSTONCH [101]3 years ago
7 0
D. Volcanoes formed most of them through eruption.
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How many atoms are present in 2g of hydrogen gas​
RSB [31]

Answer:

2 because if you look on the periodic table the number of the element tells you how many atoms is in it

Explanation:

4 0
3 years ago
The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/L. Water suppliers
posledela

Answer:

The volume of mercury-contaminated water that has to be consumed to ingest 0.100 g mercury is 2.50 × 10⁴ l

Explanation:

Hi there!

First, let´s convert 0.100 g to mg:

0.100 g · (1000 mg/1 g) = 100 mg

The contaminated water has 0.004 mg per liter, then, we have to find the volume of water that contains 100 mg of mercury:

100 mg · (1 l / 0.004 mg) = 2.50 × 10⁴ l

Then, the volume of mercury-contaminated water ( at a concentration of 0.004 mg/l) that has to be consumed to ingest 0.100 g mercury is 2.50 × 10⁴ l

Have a nice day!

8 0
3 years ago
What effect does heat have on a chemical reaction?
Advocard [28]

Answer:

Particles can only react when they collide. If you heat a substance, the particles move faster and so collide more frequently. That will speed up the rate of reaction. ... The rate of reaction will probably have doubled for that increase in temperature - in other words, an increase of about 100%.

HOPES IT HELPS

5 0
3 years ago
What would you predict to be the valence number and oxidation number of tin?
murzikaleks [220]

Answer:

Tin exists in two oxidation states, +4 and +2. Elemental tin is readily oxidized to the dipositive ion in acidic solution, but this Sn2+ ion is converted to the Sn4+ ion by many mild oxidizing agents, including elemental oxygen. Oxidation under alkaline conditions normally gives the tetrapositive (Sn4+) state.

8 0
2 years ago
PLEASE ANSWER!! I NEED HELP :)
elena-14-01-66 [18.8K]

Explanation:

To create a p-type semiconductor, group 14 semiconductors should be d o ped by atoms from group 13.

7 0
3 years ago
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