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Dima020 [189]
3 years ago
12

What is the process of using one or more of your five senses to measure or collect data?

Chemistry
2 answers:
sveta [45]3 years ago
7 0

Answer:

B no observation pls mark me branilest

adell [148]3 years ago
4 0
Can I ask you a question
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Which two conditions can limit the usefulness of the kinetic-molecular theory in describing gas behavior?
adell [148]
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-macroscopic properties: properties that can be visualized or measured by the naked eye; examples include pressure, temperature, and volume
6 0
3 years ago
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Calculate the molarity of 0.50 mol MgCl2 in 750 ml of solution.
Vedmedyk [2.9K]

Answer : The correct answer for molarity of MgCl₂ solution is 0.67 M.

Molarity :

It expresses concentration of any solution . It can be defined as mole of solute present in volume of solution in Liter .

It uses unit M or \frac{mol}{L}

It can be formulated as :

Molarity (\frac{mol}{L} ) = \frac{mole of solute (mol)}{volume of solution (L)}

Given : mol of MgCl₂ (solute ) = 0.50 mol

Volume of solution = 750 mL

Following steps can be done :

Step 1 ) To convert volume of solution from mL to L

1 L = 1000 mL

Volume of solution = 750 mL * \frac{1 L}{1000mL}

Volume of solution = 0.750 L

Step 2) To find molarity

Plugging mole of solute and volume of solution in molarity formula as :

Molarity = \frac{0.50 mol}{0.750 L }

Molarity = 0.67 \frac{mol}{L}

Hence molarity of MgCl₂ solution is 0.67 M

4 0
4 years ago
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Even though the para position is one carbon farther from the carboxy group than the meta position, p-cyanobenzoic acid is more a
Nuetrik [128]

Answer:

Dissociation of O-H bond is highly favorable in p-cyanobenzoic acid resulting to higher acidity as compared to m-cyanobenzoic acid.

Explanation:

In p-cyanobenzoic acid, adjacent carbon to carboxyl group (-COOH) gets a partial positive charge due to electron withdrawing resonating effect of carboxyl group as compared to m-cyanobenzoic acid.

Due to this partial positive charge on carbon atom in p-cyanobenzoic acid, O-H bond in -COOH group remains highly polarized towards oxygen atom. Hence, dissociation of O-H bond is highly favorable in p-cyanobenzoic acid resulting to higher acidity as compared to m-cyanobenzoic acid.

Resonance structures are given below.

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I really don’t know but I’ll tell you soon
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Calculate the percentage by mass of nitrogen in ptcl2(nh3)2.
Sav [38]
Molar Mass: 300.0510 g/mol
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