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3 years ago

Calculate the food energy (joules/

1 answer:

5 0

Calculate the food energy (joules/g) of one of your food samples. one chemistry calorie is equal to 4.186 joules. convert the energy you calculated to kilojoules (1 kj = 1000 j). since nothing is given, an example is avocadoes have 160 cal/100 g serving

(160 cal/ 100 g)(4.186 J/ 1 cal) (1 kJ/1000 J) = 0.0067 kJ/g

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A gas that was cooled to 200 Kelvin has a volume of 65.8 L. If its initial volume was 132.4 L, what was its initial temperature?

Mandarinka [93]

Answer:

Initial temperature, T1 = 99.4 Kelvin

Explanation:

<u>Given the following data;</u>

Initial volume, V1 = 65.8 Litres
Final temperature, T2 = 200 Kelvin
Final volume, V2 = 132.4 Litres

To find the initial temperature (T1), we would use Charles' law;

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles' law is given by the formula;

$\frac {V}{T} = K$

$\frac {V_{1}}{T_{1}} = \frac {V_{2}}{T_{2}}$

Making T1 as the subject formula, we have;

$T_{1} = \frac {V_{1}T_{2}}{V_{2}}$

Substituting the values into the formula, we have;

$T_{1} = \frac {65.8 * 200}{132.4}$

$T_{1} = \frac {13160}{132.4}$

<em>Initial temperature, T1 = 99.4 Kelvin</em>

6 0

2 years ago

Shale forms from tiny particles of which material?

miskamm [114]

Answer:

a. mica

Explanation:

6 0

2 years ago

Write the ions present in solution of k2co3. express your answers as chemical formulas separated by a comma. identify all of the

GarryVolchara [31]

Answer : The ions present in the solution of $K_2CO_3$ are $K^+$ and $CO^{2-}_3$ in aqueous state.

Explanation :

When $K_2CO_3$ is in aqueous solution then they dissociates into their ions.

The reaction in aqueous medium is,

$K_2CO_3(aq)\rightarrow 2K^+(aq)+CO^{2-}_3(aq)$

The charge on potassium ion is +1 and on carbonate ion is -2. To neutralize the charge on carbonate ion, two potassium ion must be used.

Therefore, the ions present in solution of $K_2CO_3$ are $K^+$ and [tex]CO^{2-}_3[tex] in aqueous state.

8 0

2 years ago

Read 2 more answers

Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. this change is considered importa

Airida [17]

Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. This change is considered important because it suggest that people may become addicted to behavior net just substance.

<h3>What is Gambling ? </h3>

Gambling disorder which involve repeated, problem gambling behavior. The behavior leads to problem for the individual families, and society.

The emotional and physical sign of gambling disorder are:

Anxiousness and Depression
Hopelessness
Lack of sleep
Pallor to skin
Gain loss of weight

<h3>What are the effects of gambling disorder ?</h3>

Gambling disorder make another kind of addiction that an individual uses to be able to deal with the situation. Start using the drugs alcohol to reduce the feeling of anxiety.

Thus from the above conclusion we can say that Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. This change is considered important because it suggest that people may become addicted to behavior net just substance.

Learn more about the Gambling Disorder here: brainly.com/question/28026101

#SPJ4

6 0

1 year ago

Scott is conducting a lab experiment when his lab paper catches on fire! Scott, knowing his safety procedures, heads towards the

LuckyWell [14K]

Answer:

Contact with corrosive substances requires flushing with water and removing contaminated clothes and jewelry. With a fire, people should first evacuate the lab. Once safe, they should close doors, pull the fire alarm, and call emergency services. Anyone who is on fire should stop, drop, and roll.

Explanation:

Because that is what you are supposed to do

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3 years ago