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BartSMP [9]
3 years ago
12

Atoms of which two elements have combined total of 23 protons​

Chemistry
2 answers:
vichka [17]3 years ago
4 0

Answer:

sodium and magnesium

Explanation:

Vikentia [17]3 years ago
3 0
Sodium,na and magnesium
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NO2 is added to the reaction to speed it up. In which form would this substance be a homogeneous catalyst for this reaction?
sammy [17]

Answer: The correct answer is A

Explanation:

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3 years ago
Determine the volume in mL of 0.242 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 46.79
Alla [95]

The volume (in mL) of 0.242 M NaOH solution needed for the titration reaction is 39.44 mL

<h3>Balanced equation </h3>

CH₃CH₂COOH + NaOH —> CH₃CH₂COONa + H₂O

From the balanced equation above,

  • The mole ratio of the acid, CH₃CH₂COOH (nA) = 1
  • The mole ratio of the base, NaOH (nB) = 1

<h3>How to determine the volume of NaOH</h3>
  • Volume of acid, CH₃CH₂COOH (Va) = 46.79 mL
  • Molarity of acid, CH₃CH₂COOH (Ma) = 0.204 M
  • Molarity of base, NaOH (Mb) = 0.242 M
  • Volume of base, KOH (Vb) =?

MaVa / MbVb = nA / nB

(0.204 × 46.79) / (0.242 × Vb) = 1

Cross multiply

0.242 × Vb = 0.204 × 46.79

Divide both side by 0.242

Vb = (0.204 × 46.79) / 0.242

Vb = 39.44 mL

Thus, the volume of NaOH needed for the reaction is 39.44 mL

Learn more about titration:

brainly.com/question/14356286

5 0
2 years ago
Calculate the volume of liquid in the tank sketched below. Give your answer in liters, and round to the nearest 0.1 L.
tensa zangetsu [6.8K]

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The answer is 18.9

Explanation:

3 0
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Why is zinc not extracted from ZnO through reduction using CO?​
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The standard Gibbs free energy of formation of ZnO from Zn is lower than that of CO2 from CO. Therefore, CO cannot reduce ZnO to Zn. Hence, Zn is not extracted from ZnO through reduction using CO
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The denser and thicker a liquid is, the higher the buoyancy of an object is. In other words, if the density of a certain fluid i
Marta_Voda [28]

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Yes this is true.

Explanation:

3 0
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