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3 years ago

What foods contain large amounts of sugars and starches?

Chemistry

2 answers:

ycow [4]3 years ago

7 0

Carbs!! (or carbohydrates)

Svetllana [295]3 years ago

7 0

Breads
potato
Pasta
Rice
Peas

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Calculate the mass of nitric acid required to make a 250mL solution with 2.40 ph

meriva

The mass of nitric acid required to make the given solution is 0.0627 g.

The given parameters:

<em>Volume of the acid, V = 250 mL</em>
<em>pH of the acid, = 2.4</em>

The hydrogen ion (H⁺) concentration of the nitric acid is calculated as follows;

$H^+ = 10^{-pH}\\\\H^+ = 10^{-2.4}\\\\H^+ = 0.00398$

The molarity of the nitric acid is calculated as follows;

$= 0.00398 \ H^+ \times \frac{1 \ M \ HNO_3}{1 \ H^+} \\\\= 0.00398 \ M$

The number of moles of the nitric acid is calculated as follows;

$moles = M\times L\\\\moles = 0.00398\ M \ \times \ \frac{250 \ mL}{1000} \\\\moles = 9.95 \times 10^{-4} \ mol.$

The molar mass of nitric acid is calculated as;

$HNO_3 = (1) \ + (14) \ + (16 \times 3) = 63 \ g/mol$

The mass of the nitric acid contained in the calculated number of moles is calculated as;

$mass = moles\ \times \ molar \ mass\\\\mass = 9.95\times 10^{-4} \ mol. \ \times \ 63 \ g/mol\\\\mass = 0.0627 \ g$

Thus, the mass of nitric acid required to make the given solution is 0.0627 g.

Learn more about molarity of acids here: brainly.com/question/13864682

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2 years ago

A solution of [FeSCN]^{2+} is found to have 37% transmittance at 447 nm. If the molar absorption coefficient (ε) is 4400 at λ_{m

alexandr1967 [171]

Answer:9.81×10^-5 M

Explanation: See attachments

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3 years ago

Circle the term or phrase in parentheses that makes each statement true.

Nataly_w [17]

A substance that produces hydrogen ions is an acid

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3 years ago

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Can sombody pls help me with this

luda_lava [24]

Wouldn’t it be half of each? For 36 I guess is 18 and 54 will be 27, (NOT SURE)

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2 years ago

A membrane Is a flexible outer layer found on:

ratelena [41]

Answeridk:

Explanation:isk

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