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ehidna [41]
3 years ago
6

How many grams of sodium ions are in na2so4?

Chemistry
1 answer:
LiRa [457]3 years ago
4 0

Answer:

142.04

Explanation:

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For 23., you have to find a way to measure your heart rate not increase it. search it up on google.

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3 years ago
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Which of the following describes an element? Choose all that apply.
Kisachek [45]

Answer:

A) Gold is an example.

D) There is only one type of substance present.

F) Composed of one type of atom with its own unique properties.

Explanation:

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5 0
2 years ago
Determine the mass (in grams) of 8.02 x 1024 atoms of mercury (Hg).
Virty [35]
<h3>Answer:</h3>

2670 g Hg

<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>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation: </h3>

<u>Step 1: Define</u>

8.02 × 10²⁴ atoms Hg

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

Avogadro's Number

Molar Mass of Hg - 200.59 g/mol

<u>Step 3: Convert</u>

  1. Set up:                               \displaystyle 8.02 \cdot 10^{24} \ atoms \ Hg(\frac{1 \ mol \ Hg}{6.022 \cdot 10^{23} \ atoms \ Hg})(\frac{200.59 \ g \ Hg}{1 \ mol \ Hg})
  2. Divide/Multiply:                                                                                               \displaystyle 2671.42 \ g \ Hg

<u>Step 4: Check</u>

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

2671.42 g Hg ≈ 2670 g Hg

3 0
3 years ago
Can someone help me
Veseljchak [2.6K]

Answer:

Is it D?

Explanation:

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Which organism has a nerve net? A fish B hydra C flatworm D sponge
pentagon [3]
The answer is B hydra
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