CHEMISTRY HIGH SCHOOL

A serving of fish contains 50 g protein and 4 g of fat. If protein has a caloric value of 4 kcal/g and fat has 9 kcal/g, how many kcal are in the serving? Round off the energy value for each food group to the tens place.

Answers

Answer 1
Answer:

Answer: 240

Explanation:
Answer 2
Answer:

Final answer:

A serving of fish contains 236 kcal.

Explanation:

To find the number of kilocalories (kcal) in a serving of fish, we need to calculate the energy from protein and fat separately and then add them together. The energy from protein is calculated by multiplying the amount of protein by its caloric value of 4 kcal/g. So, 50 g of protein provides (50 g) x (4 kcal/g) = 200 kcal. The energy from fat is calculated in the same way, so 4 g of fat provides (4 g) x (9 kcal/g) = 36 kcal. Finally, we add the energy from protein and fat together, resulting in a total of 200 kcal + 36 kcal = 236 kcal in the serving of fish.

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Which of the following would most likely act as a Bronsted-Lowry acid?
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What chemical change is magnetizing steel
Explain the relationship between chemical bonds and energy in the body.
Which set of conditions is most likely to allow a gas to be considered as an “ideal” gas?(A) low P, low T (B) low P, high T (C) high P, low T (D) high P, high T (E) all of these The answer is B because low pressure means less gas interaction and high temperature means the same?

Which element is least likely to undergo a chemical reactionA) lithium
B) carbon
C) flourine
D) neon
and can you give me a explanation with the answer you chose

Answers

The correct option is D.
Elements undergo chemical reactions because they are not stable and they want to become stable, that is they want to attain octet form. To attain octet form, an atom of element must have eight electrons in its outermost shell. Thus, elements undergo various types of chemical bonding in order to have 8 electrons in their outermost shells.
Neon has atomic number of 10 and its electronic configuration is 2,8. This means that, neon already has 8 electrons in its outermost shell and so does not need to form any chemical bond with any other element again, it is already stable. This is why, neon is the least likely to undergo chemical reaction and this is also the reason whey the element is chemically inert.
The other elements given in the option do not have 8 electrons in their outermost shell, so they will be quite willing to undergo chemical reactions in order to become stable.
d neon is the element that is least likely to undergo a chemical reaction

Which element must an organic compound contain? bromine

chlorine

iodine

carbon

Answers

Answer: D.) Carbon

Explanation: Carbon is an organic compound, any of a large class of chemical compounds in which one or more atoms of carbon are contently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.

Which best explains why blood is considered to be a suspension?A)It has nutrients that cannot be dissolved
b)It contains particles that can settle out.
C)It has nutrients that are dissolved in its liquid portion.
D)It contains particles that mix on a molecular level.

Answers

I think the best answer is b): it contains particles that can settle out.

The definition of suspension is a heterogeneous (that is same in all parts) mixture that contains particles that could undergo sedimentation (settle down) - this definition is close to b). It should not matter whether those particles are nutrients( so A or C are not good answers).


Answer:

I think the best answer is b

Explanation:

I think the best answer is b

A substance has a triple point at -24.5 ∘C and 225 mmHg. What is most likely to happen to a solid sample of the substance as it is warmed from -35 ∘C to 0 ∘C at a pressure of 220 mmHg? A substance has a triple point at -24.5 and 225 . What is most likely to happen to a solid sample of the substance as it is warmed from -35 to 0 at a pressure of 220 ? The solid will melt into a liquid, The solid will sublime into a gas, or Nothing (the solid will remain as a solid).

Answers

Answer:

The solid will sublime into a gas

Explanation:

See the phase diagram attached (the diagram is not an exact representation of this case, it is only illustrative). You starts at point A, that is, a point below triple point pressure (220 mmHg is lower than 225 mmHg) and to the left of triple point temperature (-35 °C is lower than -24.5 °C). Then, you move to point B, which is at the same pressure at A but its temperature is to the right of triple point temperature (0°C is greater than -24.5 °C).
this product remains as mercury if it is subatomic

The freezing point of bromine is
(1) 539°C (3) 7°C(2) –539°C (4) –7°C

Answers

The freezing point of bromine is –7°C. Therefore, the correct option is option D among all the given options.

What is bromine?

Bromine (Br) is a chemical substance, a deep red toxic liquid, and a member of Group 17 (Group VII) of both the periodic chart. At room temperature, free bromine seems to be a reddish brown fluid with such a significant vapour pressure.

Bromine vapour has an amber color. Bromine has a strong odor and can irritate the skin, eyes, especially respiratory system. Even brief exposure to intense bromine vapour can be lethal. The freezing point of bromine is –7°C.

Therefore, the correct option is option D.

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The freezing point of bromine is (4) -7 degrees Celsius.
Hope this helps~

A neutral atom must have the same number of neutrons and electrons true or false

Answers

False .... A neutral atom needs the same number of protons and electrons
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