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amm1812
3 years ago
10

Which group of organisms disappeared during the mass extinction at the end of the Cretaceous Period?

Chemistry
1 answer:
jolli1 [7]3 years ago
7 0

Answer:

saber tooth cats

Explanation:

You might be interested in
PLEASE ANSWER IF YOU KNOW
Lerok [7]

Answer:

The tundra!

Explanation:

It is the only biome that has an average winter temperature of -26 degrees Celsius, gets 12-20 inches of rain per year, and has grazing caribou!

Hope this helps!

3 0
3 years ago
Natural substances that have characteristic properties and somewhat specific chemical compositions are called ______.
Darya [45]

Answer:

Minerals

Explanation:

Minerals are usually defined as naturally occurring inorganic substances, that are comprised of specific chemical composition as well as having a well organized internal structure of atoms.

Different mineral forms under different conditions and under different geological settings. These minerals combine with one another giving rise to the formation of rocks.

They are characterized by the presence of both physical as well as chemical properties.

Example of some minerals includes, Calcite, Fluorite, Quartz, and Feldspar.

8 0
3 years ago
What moves an air mass
Lina20 [59]
Cold air mass and warm air mass
8 0
3 years ago
Describe the structure and bonding in sodium chloride
klio [65]
Sodium chloride is made up of sodium and chlorine.
sodium chlorine would form an ionic bond, which is the transfer of electrons

because sodium is in group 1, it has 1 electron on its outermost shell
because chlorine is in group 7, it has 7 electrons on the outermost shell.

sodium and chlorine both want a full outer shell. therefore, sodium and chlorine will form an ionic bond, and sodium will transfer its one electron to chlorine so that it can lose its electron and get a full outer shell, and chlorine can gain an electron and also get a full outer shell. this can be represented using the dot and cross model. as shown in the picture.
but don't forget to add a 1- charge to chlorine with brackets and a 1+ charge to sodium, also with brackets.


hope this helped.. I know it became really long but I didn't really realise it once I was half way.. anyway, if you have any questions just ask :)

8 0
4 years ago
When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chlorid
Mashutka [201]
The balanced chemical reaction is:

<span>Mg(s) + 2HCl(aq) = MgCl2(aq) + H2(g)
</span>
We are given the amounts of reactants to be used for the reaction. This will be the starting point of the calculations.

36.5 g Mg ( 1 mol / 24.31 g ) = 1.50 mol Mg
2 mol HCl

From the reaction, the mole ratio of the reactants is 1:2. In every 1 mole of magnesium 2 mol of hydrochloric acid is required. Therefore, from the amount supplied the limiting reactant is the hydrochloric acid.
3 0
4 years ago
Read 2 more answers
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