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Andrei [34K]
3 years ago
13

How do we get energy from the food we eat?

Chemistry
2 answers:
Doss [256]3 years ago
4 0

Answer:

b. breaking the molecular bonds in the food

Nastasia [14]3 years ago
3 0

Answer:

B

Breaking the molecular bonds in the food releases stored chemical energy.

Explanation:

I hope it helps

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Where is the genetic code located again in the dna molecule again?
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The DNA is in the nucleus.

Explanation:

The nucleus is the power house of the cell, the little sting things inside are the strands of DNA.

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What systems are working during the process of respiration?
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respiratory and lymphatic

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What is the difference of a mineral and a gem?
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A gem is a crystalized mineral.
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3 years ago
In an acid-base titration, a student uses 21.35 mL of 0.150 M NaOH to neutralize 25.00 mL of H2SO4. How many moles of acid are i
GalinKa [24]

Answer: There are 0.006 moles of acid in the flask.

Explanation:

Given: V_{1} = 21.35 mL,        M_{1} = 0.150 M

V_{2} = 25.0 mL,           M_{2} = ?

Formula used to calculate molarity of H_{2}SO_{4} is as follows.

M_{1}V_{1} = M_{2}V_{2}

Substitute the values into above formula as follows.

M_{1}V_{1} = M_{2}V_{2}\\0.15 M \times 21.35 mL = M_{2} \times 25.0 mL\\M_{2} = 0.1281 M

As molarity is the number of moles of a substance present in a liter of solution.

Total volume of solution = V_{1} + V_{2}

= 21.35 mL + 25.0 mL

= 46.36 mL  (1 mL = 0.001 L)

= 0.04636 L

Therefore, moles of acid required are calculated as follows.

Molarity = \frac{no. of moles}{Volume (in L)}\\0.1281 M = \frac{no. of moles}{0.04635 L}\\no. of moles = 0.006 mol

Thus, we can conclude that there are 0.006 moles of acid in the flask.

3 0
3 years ago
A student shines a flashlight on the lens. Which best describes what happens when light rays exit the lens?
zhannawk [14.2K]
The flashlight's beam will all be refracted towards a central axis. But, this is still dependent on the type of lens that is used for the said activity. The speed of light will vary depending whether the lens is a concave or a convex lens. The exit point of the light will always head towards the central axis.
7 0
3 years ago
Read 2 more answers
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