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3 years ago

Describe how to find calorie content in food

Chemistry

1 answer:

Fiesta28 [93]3 years ago

4 0

<u>To find the calorie content in food:</u>

Importantly, a calorie will not be considered as full or empty and not a thing too. You cannot tie calories in a bottle. A calorie is a unit of measure of energy. We can also say that, it is the energy amount that is needed to rise the temperature of one ml of water by 1 degree Celsius.

Earlier, a calorimeter was used to measure the calorie content of food. That is, a certain amount of food in which water content has evaporated, and this food was put in a vessel surrounded by some water. The container was then sealed, oxygen was supplied in, and the food was ignited.

From the temperature increase of water, the calorie content of food was determined. Today, producers use the “At water indirect system” to find calorie content by adding the calories containing the energy nutrients: protein, carbohydrate, fat and alcohol.

The At water system makes use of the average values of 4 K cal/g for protein, 4 K cal/g for carbohydrate, 9 K cal/g for fat and 7 K cal/g for alcohol that were determined by burning these substances in a calorimeter.

Thus the label on a 45 gram Perk that contains 3 g of protein, 29 g of carbohydrate (22 grams of which are simple sugars) and 12 g of fat would read 230 Calories.

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What is the process of grouping similar things together

andre [41]

Answer:

See Explanation

Explanation:

Mathematically, this means to combine like terms, such as terms with the same variable. In chemistry, this can refer to polar objects combining with polar objects while nonpolar objects combine with nonpolar objects.

8 0

4 years ago

A sample of a pure element has a mass of 45.6g and contains 4.19 x 10 23 atoms. Identify the element.

max2010maxim [7]

<h2>Answer:</h2>

ZINC

<h2>Explanation:</h2>

<em>To identify the element based on the informartion given, we have to find the molar mass since this mass is unique to each element.</em>

Molar mass = mass ÷ moles

<em>We already know the mass based on the question, as such we now need to find the # of moles.</em>

Since 1 mole contains 6.02214 × 10²³ atoms

then let x moles contain 4.19 × 10²³ atoms <em>(given in the question)</em>

<em> </em><em> </em> ⇒ x = (4.19 × 10²³ atoms × 1 mol) ÷ 6.02214 × 10²³ atoms

x = 0.69577 mol

<em>Now that we have the moles we can substitute it into the molar mass equation and solve for the molar mass.</em>

⇒ molar mass = 45.6 g ÷ 0.69577 mol

⇒ molar mass ≈ 65.54 g/mol

This molar mass is closest to that of ZINC.

7 0

3 years ago

Nonpolar substances do not dissolve in polar solvents like water. If you're conducting an investigation to test the solubility o

shusha [124]

I would expect silane because all the rest have an overall dipole movement

3 0

3 years ago

There are many factors that influence the population changes of an ecosystem. Which of these does not influence population size

devlian [24]

Answer:

B. An animal's weight

Explanation:

An animal's weight is the factor that does not influence population size in an ecosystem because this factor does not cause an increase or decrease the population of animals in an ecosystem. The birth and death rate of animals and number of animals in habitats are the factors that tells us about the increase and decrease in the population of organisms in an ecosystem but weight of organism can't affect the population.

7 0

3 years ago

Read 2 more answers

What is the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis according to the balanced equation:

Zinaida [17]

Taking into account the reaction stoichiometry, the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis is 25.956 grams.

<h3>Reaction stoichiometry</h3>

In first place, the balanced reaction is:

2 H₂O → 2 H₂ + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

H₂O: 2 moles
H₂: 2 moles
O₂: 1 mole

The molar mass of the compounds is:

H₂O: 18 g/mole
H₂: 2 g/mole
O₂: 32 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

H₂O: 2 moles ×18 g/mole= 36 grams
H₂: 2 moles ×2 g/mole= 4 grams
O₂: 1 mole ×32 g/mole= 32 grams

<h3>Definition of theorical yield</h3>

The theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

<h3>Theorical yield of O₂</h3>

The following rule of three can be applied: if by reaction stoichiometry 36 grams of water form 32 grams of oxygen, 29.2 grams of water form how much mass of oxygen?

$mass of oxygen=\frac{29.2 grams of waterx32 grams of oxygen}{36 grams of water}$

<u><em>mass of oxygen= 25.956 grams</em></u>

Finally, the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis is 25.956 grams.

Learn more about the reaction stoichiometry:

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brainly.com/question/24653699

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6 0

2 years ago