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Ber [7]
3 years ago
8

Which of the following statements is untrue in regard to sound traveling in air? 

Chemistry
2 answers:
Papessa [141]3 years ago
8 0

the answer is B Good luck!

Karo-lina-s [1.5K]3 years ago
5 0
I think the answer is B. 
You might be interested in
5 *
Virty [35]

Answer:

A. the charge on their ions

Explanation:

Elements are grouped into the same group in the periodic table if they have the same valence electrons. However, the number of valence electrons an element has, determines the number of charges it can possess.

According to this question, two elements in the same group of the periodic table will have the same charge on their ions because they both have the same number of valence electrons.

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
Rain that containing excess of acid is called
Oxana [17]

Answer:

The rain containing excess of acid I called acid rain

4 0
3 years ago
Read 2 more answers
How are physical and chemical changes similar?
Ivan
I believe A. Neither can change the number of atoms of each element that are present
4 0
3 years ago
Read 2 more answers
In an ionic compound, the charges of the _ and _ must balance to produce an electrically substance.
solong [7]

Answer:

positive(cations) and negative(anions)

Explanation:

5 0
3 years ago
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