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k0ka [10]
3 years ago
11

When does the first step of digestion usually occur?

Chemistry
2 answers:
SVEN [57.7K]3 years ago
5 0

Answer:

B.

when the food is chewed

Explanation:

first step is from your mouth when you chew the food

USPshnik [31]3 years ago
5 0

Answer:

when the food is chewed

Explanation:

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What is the value of youth participating in volunteering​
bearhunter [10]

Answer:

Volunteering helps the teens gain new skills necessary for the job market such as leadership, communication skills, dependability, time management, and decision making.

Explanation:

The Hidden Values of Volunteering

Learn New Skills. One fantastic thing that volunteering can offer you is a new understanding of your own abilities. ...

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3 0
3 years ago
Why is pure silicon a poor conductor at room temperature brainly
trapecia [35]
Pure silicon is a poor conductor at room temperature because it has 4 valence electrons
4 0
3 years ago
What is the molar mass of CaCl2?
Aleks04 [339]

Answer: The molar mass of the given compound is 1.11\times 10^2 g/mol

Explanation:

In molecular formula of CaCl_2 there are two chlorine atoms and one calcium atom.

The atomic mass of the calcium = 40.07 g/mol

The atomic mass of chlorine = 35.5 g/mol

Molar mass of the guven compound is :

40.07 g/mol + 2\times 35.5 g/mol=111.07 g/mol\approx 1.11\times 10^2 g/mol

The molar mass of the given compound is 1.11\times 10^2 g/mol

8 0
3 years ago
If 20.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 37.5 mL of 0.124 M HCl, what is the concentration of the C
Nady [450]
You first need to write the balanced chemical reaction for what is going on.
Ca(OH)₂+2HCl→2H₂O+CaCl₂

After you make the balanced chemical reaction, First you find the moles of HCl used.  To do this multiply 0.0375L by 0.124M to get 0.00465mol HCl.  Then you multiply 0.00465mol HCl by (1mol Ca(OH)₂)/(2mol HCl) to get 0.002325mol Ca(OH)₂.  Finally to find concentration of Ca(OH)₂ used you divide 0.002325mol by 0.020L to get 0.116M Ca(OH)₂.
Therefore the concentration of the unknown solution of Ca(OH)₂ was 0.116M.

I hope this helps.  Let me know if anything is unclear.
6 0
3 years ago
Why are constellations in predictable in the night sky but why are planets so hard to find?
Oksanka [162]
Planets don’t produce their own light. They reflect on the light of the sun in the same way our moon reflects sunlight.
7 0
3 years ago
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