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3 years ago

The strongest intermolecular interactions between hydrogen fluoride (hf) molecules arise from

1 answer:

8 0

Answer:
<span>The strongest intermolecular interactions between hydrogen fluoride (hf) molecules arise from Hydrogen Bonding.

Explanation:
Hydrogen Bond interactions are considered the strongest intermolecular interactions among molecules. These interactions are found between Hydrogen atom of one molecule bonded to most electronegative atoms (i.e F, O, N) and the most electronegative atoms of neighbor molecule.
In case of HF, fluorine has the greatest electronegativity of 4, so the hydrogen bonded to Fluorine becomes partial positive and makes Hydrogen bond with Fluorine atom of </span>neighbor HF molecule.<span />

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For the chemical equations shown below, label each reactant as either acid or base, and each product as either conjugate acid or

Veronika [31]

Acids are ionic compounds with hydrogen at the front. Bases are ionic compounds with hydroxide at three back(bronsted definition)
A conjugate acid is a base that has gained a proton(hydrogen ion) and a conjugate base is formed when an acid has given up its proton.

8 0

3 years ago

The molar mass of KCl is 74. 55 g/mol. If 8. 45 g KCl are dissolved in 0. 750 L of solution, what is the molarity of the solutio

rosijanka [135]

Molarity is the strength of the solution or the ratio of the moles and the volume of the solution. The molarity of the solution is 0.1516 mol per Liter.

<h3>What is molarity?</h3>

Molarity is the molar concentration of the solution that tells about the amount of the solute or the substance dissolved in the given amount of the solution.

Given,

Mass of potassium chloride = 8.45 g
Molar mass of potassium chloride = 74. 55 g/mol
Volume of the solution = 0.750 L

Moles can be calculated by:

$\begin{aligned}\rm Moles &= \rm \dfrac{Mass }{\rm Molar \;mass}\\\\&= \dfrac{8.45}{74.55}\\\\&= 0.1133\;\rm mol\end{aligned}$

Calculate molarity by:

$\rm Molarity = \dfrac{moles}{\text{Volume in L}}$

Substituting values in the equation:

$\begin{aligned}\rm Molarity &= \dfrac{0.1133}{0.750}\\\\&= 0.1516 \;\rm mol\;L^{-1}\end{aligned}$

Therefore, the molarity of the solution is 0.1516 mol per Liter.

Learn more about molarity here:

brainly.com/question/2560307

4 0

2 years ago

if 0.953 g of copper was actually recovered at the end of the entire experiment, what would be the percent yield?

GrogVix [38]

Here is the full question:

Cu(s) + 4HNO3(aq) -> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

1.000 g copper wire is reacted with 10 mL of concentrated nitric acid (16M). If 0.953 g of copper was actually recovered at the end of the entire experiment, what would be the percent yield?

Answer:

95.30 %

Explanation:

equation for the reaction is given as:

Cu(s) + 4HNO3(aq) -> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

1.00 g of Cu = $\frac{1.00}{63.54 mol of Cu}$

= 0.01574 mol of Cu

10 mL of 16 M HNO3 = $10*\frac{16}{1000 mole of HNO3}$

= 0.16 mol of HNO3

However, from both variables; we can arrive at a conclusion that Cu is the limiting reagent.

therefore % yield = = 4.70 %

Percentage yield = $\frac{actual yield}{theorectical yield} *100%$

Percentage yield = $\frac{0.953}{ 1.000}* 100$ %

Percentage yield = 0.953 × 100%

Percentage yield = 95.30 %

3 0

3 years ago

4. What are the products (things made) of cellular respiration?

Vlad [161]

Answer:

Explanation:

Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

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3 years ago

True or false. the arrow labeled C represents a transfer of chemical energy to mechanical energy. explain why this is true or fa

ArbitrLikvidat [17]

False, it’s not mechanical energy it’s thermal energy.

8 0

2 years ago