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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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In what period will you find chlorine​
Ber [7]

Answer:

Chlorine can be found in Period 3.

Explanation:

Periods on the periodic table are the rows (horizontal sections) that group elements together. By looking across Period 3, you will find Cl (chlorine).

4 0
3 years ago
1) Choose the correct statement from the options below.
Elena L [17]

<u>Answer:</u>

For 1: The correct answer is Option D.

For 2: The correct answer is Option A.

<u>Explanation:</u>

  • <u>For 1:</u>

Polar molecules are defined as the of molecules, in which two atoms that combine must be of different element and therefore can create a dipole. For a dipole, there must be a difference in electronegativity and that is achieved when two atoms of different electronegativity combine. The negative dipole or charge is created on the electronegative atom and positive dipole or charge is created on the electropositive atom.

Thus, the correct answer is option D.

  • <u>For 2:</u>

Non-polar molecules are defined as the molecules which are formed when two atoms of same element combine, so that a dipole cannot be created. When there is no dipole, there will be no difference in electronegativity and this is achieved when two atoms of same electronegativities combine.

Thus, the correct answer is A.

3 0
3 years ago
Read 2 more answers
A new synthetic element has two isotopes. If the first isotope has a mass of 259.98 amu and a percent abundance of 62%, what is
Sphinxa [80]
The sum of the percentage abundance of these two isotopes of the new synthetic element should be equal to 100. If we let x be the percent abundance of the second isotope, we have the equation,
                                           62 + x = 100
The value of x from the equation is 38. 
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4 years ago
Energy is released during which phase changes?
enyata [817]

Answer:

There are two phase changes where the heat energy is released: Condensation: When gas condenses to liquid the quantity of energy converted from chemical to heat is called the Heat of Vaporization or Δ Hvap .

3 0
4 years ago
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