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Doss [256]
3 years ago
7

What mass of KCl is contained in 3.00 L of solution that has a molarity of 1.50M

Chemistry
2 answers:
Soloha48 [4]3 years ago
8 0

Answer:

335.25g

Explanation:

using equation of molarity

Butoxors [25]3 years ago
8 0

Answer:

The solution contains 335.5 grams of KCl

Explanation:

Step 1: Data given

Volume of the KCl solution = 3.00 L

Molarity of the KCl solution = 1.50 M

Molar mass of KCl = 74.55 g/mol

Step 2: Calculate moles KCl

Moles KCl = molarity KCl solution * volume KCl solution

Moles KCl = 1.50 M * 3.00 L

Moles KCl = 4.50 moles

Step 3: Calculate mass of KCl

Mass KCl = moles KCl * molar mass KCl

Mass KCl = 4.50 moles * 74 .55 g/mol

Mass KCl = 335.5 grams

The solution contains 335.5 grams of KCl

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What is the kinetic energy in kJ of 1 mole of water molecules (mass=18) if the average velocity is 590 m/s (1300 mph)
zubka84 [21]

Answer:

= 3132.9 Joules

Explanation:

  • Kinetic energy is the energy possessed by a body when in motion.
  • Kinetic energy is calculated by the formula; K.E = 1/2 mV², where m is the mass of the body or object, and V is the velocity.
  • Therefore kinetic energy depends on the mass and the velocity of the body or the object in motion.

In this case;

Kinetic energy = 0.5 × 0.018 kg × 590²

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3 years ago
A plasma membrane and a cell wall _____.
klemol [59]
<h3><u>Answer;</u></h3>

<em>D. Have different structures and different functions</em>

A plasma membrane and a cell wall <em><u>have different structures and different functions</u></em>.

<h3><u>Explanation;</u></h3>
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  • <em><u>Cell wall</u></em>, on the other hand is a structure that is found on plant cells and lacks in animal cell. It <em><u>contains cellulose in its structure </u></em>which enables it to be rigid and enhances it <em><u>protect the cell from mechanical damage</u></em> from harsh conditions such as pressure in the outside environment.

5 0
3 years ago
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How many grams of water are produced when 35.8 grams of Calcium hydroxide reacts with lots of Hydrochloric acid?
Veseljchak [2.6K]

Are produced 72 grams of water in this reaction.

<h3>Mole calculation</h3>

To find the value of moles of a product from the number of moles of a reactant, it is necessary to observe the stoichiometric ratio between them:

                          Ca(OH)_2 + 2HCl = > 2H_2O + CaCl_2

Analyzing the reaction, it is possible to see that the stoichiometric ratio is 1:2, so we can perform the following expression:

MM_{Ca(OH)_2} = 74.1g/mol

                                           MM = \frac{g}{mol}

                                             74.1 = \frac{35.8}{mol}\\mol = 2

So, if there are 2 mols of Ca(OH)2:

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Finally, just find the number of grams of water using your molar mass:

MM_{H_2O} = 18g/mol

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So, 72 grams are produced of water in this reaction.

Learn more about mole calculation in: brainly.com/question/2845237

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