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zheka24 [161]
3 years ago
8

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?
Delvig [45]
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.
6 0
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:

5 0
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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5 0
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

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. 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>

  1. Set up:                               \displaystyle 13.7 \ g \ Ca(\frac{1 \ mol \ Ca}{40.08 \ g \ Ca})
  2. 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

6 0
3 years ago
What power source uses the earth’s internal heat?
neonofarm [45]
The answer is geothermal.
Geo (earth) and thermal (heat).
3 0
3 years ago
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