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3 years ago

3. Name the property on which floating and sinking of a body depends.

Chemistry

1 answer:

Gekata [30.6K]3 years ago

5 0

Answer:

body mass index

Explanation:

it is the property by which the floating and sinking of body depends

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What is the strongest intermolecular force between an NaCl unit and an H2O molecule together in a solution? A. Covalent bonding

pochemuha

Answer:

Explanation:

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3 years ago

Identify ALL the possible mol ratio from<br> this balanced equation:

grandymaker [24]

Answer:

$\frac{1 mole of N_{2} }{3 moles of H_{2} }$

Explanation:

The equation of the reaction:

Nitrogen gas N₂ reacts with Hydrogen as H₂ to produce ammonia NH₃;

N₂ + H₂ → NH₃

The balanced equation is ;

N₂ + 3H₂ → 2NH₃

The mole ratio is the ratio of the coefficients of the combining reactants;

1 mole of N₂ combines with 3 mole of H₂;

So;

$\frac{1 mole of N_{2} }{3 moles of H_{2} }$

3 0

3 years ago

An impure sample of benzoic acid (C 6H 5COOH, 122.12 g/mol) is titrated with 0.2099 M NaOH. A 1.021-g sample requires 35.73 mL o

Finger [1]

Answer:

The percent by mass of benzoic acid = 89.7 %

Explanation:

Step 1: Data given

Molarity of NaOH = 0.2099 M

Mass of the sample = 1.021 grams

Volume of NaOH = 35.73 mL = 0.03573 L

Step 2: The balanced equation

C6H5COOH(aq) + NaOH(aq) → NaC6H5COO(aq) + H2O(l)

Step 3: Calculate moles NaOH

Moles NaOH = molarity NaOH * volume NaOH

Moles NaOH = 0.2099 * 0.03573 L

Moles NaOH = 0.00750 moles

Step 3: Calculate moles benzoic acid

From your balanced equation - benzoic acid reacts in 1:1 molar ratio with NaOH

The sample must have contained 0.00750 moles benzoic acid

Mass benzoic acid in 0.00750 moles = 0.00750 * 122.12 = 0.9159 g benzoic acid

Mass % acid in sample = 0.9159/1.021 * 100 = 89.7% purity.

The percent by mass of benzoic acid = 89.7 %

5 0

3 years ago

D. 100 mph

Andrej [43]

Answer:

The answer is c

Explanation:

200 divided by 100 is 2 and you can check that by multiplying 2 by 100.

4 0

3 years ago

A compound contains 78.14% B and 21.86% H by mass and has a molar mass of 27.67 g/mol. What is the molecular formula of the comp

ziro4ka [17]

Answer:

The molecular formula of the compound is B₂H₆

Explanation:

From the question given above, the following data were obtained:

Composition of Boron (B) = 78.14%

Composition of Hydrogen (H) = 21.86%

Molar mass of compound = 27.67 g/mol

Molecular formula =?

Next, we shall determine the empirical formula of the compound. This can be obtained as follow:

B = 78.14%

H = 21.86%

Divide by their molar mass

B = 78.14 / 11 = 7.104

H = 21.86 / 1 = 21.86

Divide by the smallest

B = 7.104 / 7.104 = 1

H = 21.86 / 7.104 = 3

Thus, the empirical formula of the compound is BH₃

Finally, we shall determine the molecular formula of the compound. This can be obtained as illustrated below:

Molecular formula = empirical formula × n

Molecular formula = [BH₃]ₙ

Thus, we shall determine the value of n to obtain the molecular formula. The value of n can be obtained as follow:

[BH₃]ₙ = 27.67

[11 + (3×1)]n = 27.67

[11 + 3]n = 27.67

14n = 27.67

Divide both side by 14

n = 27.67 / 14

n = 2

Molecular formula = [BH₃]ₙ

Molecular formula = [BH₃]₂

Molecular formula = B₂H₆

4 0

3 years ago

3. Name the property on which floating and sinking of a body depends.​

3. Name the property on which floating and sinking of a body depends.