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zloy xaker [14]
3 years ago
13

Using stoichiometry, determine the mass of powdered drink mix needed to make a 1.0 M solution of 100 mL from C12H22O11

Chemistry
1 answer:
ser-zykov [4K]3 years ago
6 0

Answer:

\boxed{\text{3.4 g}}

Explanation:

Step 1. Calculate the moles of C₁₂H₂₂O₁₁

\text{n = 0.100 L} \times \dfrac{\text{1.0 mol}}{\text{1 L}}=\text{0.100 mol}

Step 2. Calculate the mass of C₁₂H₂₂O₁₁

\text{m = 0.100 mol} \times \dfrac{\text{342.30 g}}{\text{1 mol}} = \text{3.4 g}\\\\\text{The mass of sucrose needed is }\boxed{\textbf{3.4 g}}

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7 0
3 years ago
Sodium metal reacts with water to produce hydrogen gas.
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Answer:

Explanation:

Question 6 options:

1)

A single replacement reaction takes place because sodium is less reactive than hydroxide ions.

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3 years ago
The proposed mechanism for a reaction is: Step 1: A + B X (fast) Step 2: X + C Y (slow) Step 3: Y D (fast) What is the overall r
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Answer:

(slow)xy2+z→xy2z (fast) c step1:step2:xy2+z2→xy2z2

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Step1: xy2+z2→xy2z2 (slow)

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Rate= k[xy2][z2]

 

When the two elementary steps are summed up, the result is equivalent to the stoichiometric equation. Hence, this mechanism is acceptable. The order of both elementary steps is 2, which is ‘≤3’; this also makes this mechanism acceptable. Furthermore, the rate equation aligns with the experimentally determined rate equation, and this also makes this mechanism acceptable. Therefore, since all the three rules have been observed, this mechanism is possible.

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3 years ago
Geologists divide Earth’s long history into smaller units that make up the geologic time scale.
aleksandrvk [35]

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The geologic time scale which simplifies earth's long history is broad division of deep time. It consists of a large and small divisions.

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8 0
3 years ago
Which of the following pieces of laboratory glassware should be used to most accurately measure out a 25.00 ml sample of a solut
wel

Answer:

The correct answer is 25 mL graduated cylinder (it should be used in all the cases)

Explanation:

In order to measure 25.00 ml sample of a solution it should be used a 25 mL graduated cylinder, as it is previously and properly calibrated. The other laboratory glassware, beaker and erlenmeyer, have graduations which are approximate, so they are used when exact volumes are not needed.

ii) graduated cylinder has the least uncertainly. It is more accurate than a beaker or erlenmeyer (to within 1%)

iii) A 25 mL graduated cylinder should be used because it is the most accurate lab glassware (between those were mentioned: beaker, erlenmeyer).

6 0
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