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Llana [10]
2 years ago
11

Calculate the average atomic mass for element X. (Please HELP)

Chemistry
2 answers:
oksano4ka [1.4K]2 years ago
7 0
Where is the image can you please attached the image
liraira [26]2 years ago
5 0
The image of the question is not attached
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Which of the following best describes a pair of elements that will form an ionic bond?
baherus [9]
An ionic bond forms between a metal and a nonmetal. So, since C and O are nonmetals it cannot be that one. Also, P and Cl are also both nonmetals so it cannot be that one either. That leaves Li and O and Ca and Br. In an ionic bond metals loose electrons and nonmetals gain electrons. Therefore it cannot be Li and O because it states that oxygen, the nonmetal, looses electrons and lithium, the metal, looses electrons. So, the answer has to be Ca and Br because Ca, the metal, looses electrons and Br, the nonmetal, gains electrons.  
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2 years ago
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What kind of rocks are formed by the precipitation of calcium carbonate (CaCO3) from sea water? Select all that apply.
Vikki [24]

Shale, and Sandstone are the rocks formed by precipitation of calcium carbonate from sea water.

Option B and D

<u>Explanation:</u>

Calcium carbonate can get precipitated from sea water and it forms rocks termed as limestones. These limestones are a variety of sedimentary rocks. Along with it, shale and sandstones are also varieties of sedimentary rocks and they also contain some of the precipitation of calcium carbonate.

The composition of sandstones consists of quartz and feldspar along with some of the composition of calcium carbonate. The same concept goes for Shale also. Basically, Shale is a mixuture of Clay but they can combine with limestone.

Thus, Shale, Sandstone and limestones are the rocks formed by precipitation of calcium carbonate from sea water.

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What weather would create the smaller waves?
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