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icang [17]
3 years ago
12

4. What threatens the health of coral reefs? (Select all that apply.)

Chemistry
2 answers:
Tanzania [10]3 years ago
8 0

Answer:

Explanation:

1,2,3

shusha [124]3 years ago
7 0
I would say ocean water pollution... forgive me if I’m wrong.
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Use the pictures below to answer these questions: How does Magnesium become an ion? What is the charge of the Magnesium ion?
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Answer:

Explanation:

The bottom picture shows a Mg atom. There are two electrons on the outside ring. When Mg reacts with something, these 2 electrons are given away. The top picture records that fact.

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A student dissolves a substance in water, tests the resulting solution, and observes that red litmus paper turns blue. based on
dlinn [17]

Answer:

The solution is a base

Explanation:

A basic solution changes red litmus paper to blue. This is one unique property of a base that differentiate them from All other compound

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Sample X has a mass of 22.7 g and reacts with sample Y to form sample XY with a total mass of 86.9 g. What is the mass of sample
kolezko [41]

Answer:

\large \boxed{\text{64.2 g}}

Explanation:

                 X  +  Y ⟶ XY

mass:  22.7 g   x     86.9 g

According to the Law of Conservation of Mass, the mass of the product must equal the mass of the reactants.

\begin{array}{rcl}\text{22.7 g} + x & = & \text{86.9 g}\\x & = & \text{86.9 g} - \text{22.7 g}\\& = & \textbf{64.2 g}\\\end{array}\\\text{The mass of Y is $\large \boxed{\textbf{64.2 g}}$}

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A. No need technique
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Which scientist is correctly matched with his contribution to atomic theory? Rutherford inferred the existence of a dense, posit
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