A food is initially at a moisture content of 90% dry basis. Calculate the moisture content in wet basis

Answers

Answer 1

Answer:

Answer:

Moisture content in wet basis = 47.4 %

Explanation:

Moisture content expresses the amount of water present in a moist sample.Dry basis and wet basis are widely used to express moisture content.

The next equation express the moisture content in wet basis:

$MC_(wb)=(MC_(db))/(1+MC_(db))$

where, $MC_(wb)$ : moisture content in wet basis and

$MC_(db)$ : moisture content in dry basis

We now calculate the moisture content in wet basis:

$MC_(wb)=(MC_(db))/(1+MC_(db))$

$MC_(wb)=(0.90)/(1+0.90)$

$MC_(wb)$ = 0.474 = 47.4 % wet basis

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The table shows a chemical equation and the dimensional analysis used by a student to calculate the number of moles of Ba3N2 required to produce 6.7 moles of Ba(OH)2. Student's Dimensional Analysis Chemical Equation Dimensional Analysis Ba3N2 + 6H2O → 3Ba(OH)2 + 2NH3 3 mol of Ba(OH)2 x 1 mol of Ba3N2 / 6.7 mol of Ba(OH)2 What is the error in the dimensional analysis?

Answers

Answer:

Its arrangement.

Explanation:

Hello,

In this case, we rewrite the chemical reaction as:

$Ba_3N_2+6H_2O-->3Ba(OH)_2+2NH_3$

Now, a more organized dimensional analysis is shown below to determine the very same required value:

$n_(Ba_3N_2)=6.7molBa(OH)_2*(1molBa_3N_2)/(3molBa(OH)_2)$

Without giving the numerical answer, one sees that the student's dimensional analysis is wrongly written as long as the 3 moles of $Ba(OH)_2$ must be dividing rather than multiplying as it is the relationship factor used to relate it with the $Ba_3N_2$ based on the reaction stoichiometry. Moreover, the 6.7moles of $Ba(OH)_2$ must be multiplying as it is the starting value.

Best regards.

Answer:

The error is in the rule of three.

3 mol of Ba(OH)2 ___ comes from ____ 1 mol Ba3N2

6.7 mol of Ba(OH)2 ___ comes from ___ (6.7 .1) / 3

Explanation:

Ba3N2 + 6H2O → 3Ba(OH)2 + 2NH3

3 mol of Ba(OH)2 x 1 mol of Ba3N2 / 6.7 mol of Ba(OH)2

- The rule of three is wrong.

- The chemical equation is ballanced.

- The question is not clear about which is the limiting reactant. May be we don't have enough water, so that's the limiting and Ba3N2 is in excess. So have to work with H2O.

In a lab experiment 80.0 g of ammonia [NH3] and 120 g of oxygen are placed in a reaction vessel. At the end of the reaction 72.2 g of water are obtained. Determine the percent yield of the reaction.

Answers

The percent yield of the reaction : 89.14%

Further explanation

Reaction of Ammonia and Oxygen in a lab :

4 NH₃ (g) + 5 O₂ (g) ⇒ 4 NO(g)+ 6 H₂O(g)

mass NH₃ = 80 g

mol NH₃ (MW=17 g/mol):

$(80)/(17)=4.706$

mass O₂ = 120 g

mol O₂(MW=32 g/mol) :

$\tt (120)/(32)=3.75$

Mol ratio of reactants(to find limiting reatants) :

$\tt (4.706)/(4)/ (3.75)/(5)=1.1765/ 0.75\rightarrow O_2~limiting~reactant(smaller~ratio)$

mol of H₂O based on O₂ as limiting reactants :

mol H₂O :

$\tt (6)/(5)* 3.75=4.5$

mass H₂O :

4.5 x 18 g/mol = 81 g

The percent yield :

$\tt \%yield=(actual)/(theoretical)* 100\%\n\n\%yield=(72.2)/(81)* 100\%=89.14\%$

Which of the following is a chemical property?A. Gallium metal melts in your hand.
B. Platinum does not react with oxygen at room temperature.
C. The page of the textbook is white.
D. The copper sheets that form the "skin" of the Statue of Liberty
have acquired a greenish coating over the years.

Answers

The answer is D I asked the teacher

Final answer:

A chemical property is a characteristic observed during a reaction where the substance's chemical composition changes. In the provided options, 'Platinum does not react with oxygen at room temperature' and 'The copper sheets of the Statue of Liberty have acquired a greenish coating over the years' are chemical properties.

Explanation:

In Chemistry, a chemical property is a characteristic that is observed during a reaction in which the chemical composition or identity of the substance is changed. Taking a look at the options provided:

Gallium metal melts in your hand is a physical property as melting point is not a chemical change.
Platinum does not react with oxygen at room temperature is a chemical property because it is about the propensity of platinum to react (or not react) which is a chemical behavior.
The page of the textbook is white is physical property because color does not indicate a chemical change.
The copper sheets that form the 'skin' of the Statue of Liberty have acquired a greenish coating over the years is also a chemical property because the green coating is a result of a chemical reaction (oxidation).

So, the correct answers are options B and D. Both entail a change or lack of change in the chemical identity of a substance.

Learn more about Chemical Property here:

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Which element is oxidized in the following reaction Mn²⁺ + 2 K → Mn(s) + 2 K⁺ ?

Answers

Potassium is oxidized (k)
Leo ger is the nuemonic
- loss electrons = oxidized
- gain electrons = reduced

You can see K gains a positive charge so it is safe to assume it lost some (negatively charged) electrons

An organic compound was extracted into dichloromethane and then the aqueous layer is shaken with saturated sodium chloride solution. What is the purpose of the sodium chloride? A. to decrease the solubility of the organic product in water B. to raise the density of the aqueous layer so that it will be the bottom layer C. to lower the boiling point of the water to cause the water D. to be immiscible with the methylene chloride

Answers

Answer: option A. to decrease the solubility of the organic product in water

Explanation: sodium chloride solution act as a drying agent to remove water from an organic compound that is in solution. The salt water works to pull the water from the organic layer to the water layer,therby decreasing

Please ignore my answers because they are wrong.