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Usimov [2.4K]
3 years ago
5

How many lithium atoms does 4Li2O?

Chemistry
1 answer:
babunello [35]3 years ago
3 0

8 atoms in Lithium..

<h3><u>If</u><u> </u><u>this</u><u> answer</u><u> helps</u><u> you</u><u> plz</u><u> mark</u><u> as</u><u> brainlist</u><u>.</u><u>.</u></h3><h2><u>But</u><u>,</u><u> don't</u><u> </u><u>report</u><u> </u><u>my</u><u> answer</u><u>.</u><u>.</u></h2>

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H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4
dem82 [27]
<h3>Answer:</h3>

23.459 g NaNO₂

<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>Stoichiometry</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN] H₂SO₄ + 2NaNO₂ → 2HNO₂ + Na₂SO₄

[Given] 24.14714 g Na₂SO₄

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

[RxN] 1 mol Na₂SO₄ = 2 mol NaNO₂

Molar Mass of Na - 22.99 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of Na₂SO₄ - 2(22.99) + 32.07 + 4(16.00) = 142.05 g/mol

Molar Mass of NaNO₂ - 22.99 + 14.01 + 2(16.00) = 69.00 g/mol

<u>Step 3: Stoichiometry</u>

  1. Set up:                              \displaystyle 24.14714 \ g \ Na_2SO_4(\frac{1 \ mol \ Na_2SO_4}{142.05 \ g \ Na_2SO_4})(\frac{2 \ mol \ NaNO_2}{1 \ mol \ Na_2SO_4})(\frac{69.00 \ g \ NaNO_2}{1 \ mol \ NaNO_2})
  2. Multiply/Divide:                                                                                                \displaystyle 23.4587 \ g \ NaNO_2

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We need 5 sig figs (instructed).</em>

23.4587 g NaNO₂ ≈ 23.459 g NaNO₂

8 0
3 years ago
Read 2 more answers
A 0.15 M NaOH solution has a volume of 0.125 L but is then diluted to 0.15 L. What is the concentration of the new solution
tresset_1 [31]

Answer:

.125 M

Explanation:

.15 M/L   * .125 L = .01875 moles

now dilute to 150 cc  (by adding 25 cc)

.01875M / (150/1000) = .125M

5 0
2 years ago
Unstable isotopes occur when the strong force is unable to overcome the _________.
Alecsey [184]
Unstable isotopes occur when the strong force is unable to overcome the <span> <span>electrostatic force.</span></span><span>
There are no stable isotopes in the elements  at the upper end of the periodic table, which clearly demonstrates the limit of the ability of the nuclear binding energy or the residual strong force,  to overcome the electrostatic repulsion of all those protons in the nucleus.

</span>
6 0
3 years ago
What is the molarity of a solution that has 0.030 mil of NaCl dissolved in 1.2 L solution?
aliina [53]

Answer:

"Well, by definition,

molarity=

<u>moles of solute </u>

volume of solution"

Explanation:

THE LINES UNDER <u>moles of solute </u>MEANS ITS OVER volume of solution"

I THINK IM RIGHT PLZ NOT HATE ON ME IF IN WRONG

7 0
4 years ago
The free energy of ATP hydrolysis is used to maintain the concentration of Ca2 inside the cell to be constant. Calculate the num
Delicious77 [7]

Answer:

The response can be defined as follows:

Explanation:

ATP is a hydrolysis energy-saving money of the cell. It is used to support the cell's endothermic processes.

ATP\ +\ H_{2}O\ \rightleftharpoons \ ADP\ +\ P_{i}\\\\Q\ = \ \frac{[ADP][P_{i}]}{[ATP][H_{2}O]}\\\\ADP= 0.250 \ M\\\\P_i = 0.010 \ M\\\\ATP = 0.150 \ M\\\\H_2O = 55.55 \ M\\\\\Delta G \ =\ \Delta G^{o}\ +\ 2.303\ RT\ \log\ Q\\\\R = 8.314 \frac{J}{mol\ K}\\\\T = 298\  K\\\\

4 0
3 years ago
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