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tankabanditka [31]
3 years ago
10

DNA samples should not be stored where?

Chemistry
2 answers:
garri49 [273]3 years ago
8 0

Answer:

in the brain

Explanation:

Anton [14]3 years ago
6 0

Answer:

in the brain

Explanation:

it is bad and will cause harm

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11.9 g Cl2 is reacted with 10.7 g NaOH. How many moles of NaCl are produced?
melisa1 [442]

Answer:

1. 7.256g of NaCl

2. 47.33g of Cl2

Explanation:

2 moles of Na reacts to produce 2 moles of NaCl

8 moles of Na will still produce 8 moles of NaCl

Mass of NaCl = molar mass of Nacl/moles of Nacl

=58.5/8

=7.256g of NaCl

From the equation, 2 moles of Na reacts with 1 mole of Cl2

3/2 moles of Cl2 will react with 3 moles of Na

Mass of Cl2 = 71/1.5

=47.33g of Cl2

Explanation:

4 0
2 years ago
Name the ion and formula for bicarbonate
Romashka [77]
I think it is ... HCO3
3 0
3 years ago
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Which of the following statements is true?
Lera25 [3.4K]

The  statement  which is true is

metals  lose  electrons  to become cations

<u><em>Explanation</em></u>

  • metals tends  to loss electrons to attain  noble gas  electrons  configuration.
  • When metal loses electrons they form a  positive charged ions.
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  • for  example  sodium metal (Na)  loses  1 electron to form   a cation with  a charge  of positive 1 ( Na^+)
3 0
3 years ago
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What kind of orbital is occupied by the lone pair electrons in caffeine molecule?
Nataly [62]
The middle nitrogen has two sigma bonds and one pi bond. You know that one p orbital is used in the double bond and two sp2 orbitals are involved in the sigma bond. This leaves one sp2 orbital for the lone pair to occupy.
8 0
3 years ago
What volume of H2 at STP, can be released by 42.7 g Zn in the equation: Zn + 2 HCl ————&gt; H2 + ZnCl2
ehidna [41]

Answer:

0.86L.

Explanation:

1mol of Zn has mass of 65.39g . The amount of Zn is 2.5g65.39g/mol=0.038mol

7 0
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