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3 years ago

Please help me with this

Chemistry

1 answer:

kifflom [539]3 years ago

7 0

Answer
C. Get glucose from food they eat

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An unknown solution has a ph of 8. how would you classify this solution?

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I believe the correct answer from the choices listed above is option C. You would classify this solution as basic since it has the pH of more than 7 which signifies a basic solution. Hope this answers the question. Have a nice day. Feel free to ask more questions.

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4 years ago

The electron configuration of an atom in the ground state is

Naya [18.7K]

Answer: the arrangement of electrons around the nucleus of an atom with lower energy levels.

Explanation:

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3 years ago

If a frog initially contained 2 grams of carbon-14 and the half-life of carbon-14 is 5,730 years, how much carbon-14 remains in

andreyandreev [35.5K]

Half life is the time taken for a radioactive isotope to decay by half its original mass. In this case the half life of carbon-14 is 5.730 years.
Using the formula;
New mass = original mass × (1/2)^n; where n is the number of half lives (in this case n=1 )
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3 years ago

How many moles are in a 13.7g block of calcium?

goldenfox [79]

<h3>Answer:</h3>

0.342 mol Ca

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

13.7 g Ca

<u>Step 2: Identify Conversions</u>

Molar Mass of Ca - 40.08 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 13.7 \ g \ Ca(\frac{1 \ mol \ Ca}{40.08 \ g \ Ca})$
Multiply/Divide: $\displaystyle 0.341816 \ mol \ Ca$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.341816 mol Ca ≈ 0.342 mol Ca

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3 years ago

What power source uses the earth’s internal heat?

neonofarm [45]

The answer is geothermal.
Geo (earth) and thermal (heat).

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3 years ago

Read 2 more answers