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Readme [11.4K]
3 years ago
8

Someone please help?!?

Chemistry
1 answer:
ss7ja [257]3 years ago
4 0

Answer: to late sorry maybe next time

Explanation:

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What is the reactivity trend of halogens?
RSB [31]
Reactivity trends of halogen:

1) Melting point and boiling points increased down the
group

2) Colour becomes darker.
E.g. Fluorine (pale yellow)
Chlorine (yellowish-green)
Bromine (reddish-brown)
Iodine (purplish-black)
Astatine (black)

3) The reactivity decreases down the group.
Reactivity:
F > Cl > Br > I > At
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Which symbol is associated with structure C?<br> A. _<br> B.+<br> C.X<br> D.<br> none
IgorLugansk [536]
B I’m guessing not sure
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Which indicator would show a pH change from 6 to 7?
tatyana61 [14]

Answer:

c

Explanation:

1. litmus paper is used when showing a change between a greater range in ph levels - so A and D are automatically a no.

2. methyl red is used to show a range in ph levels between 4.8-6

3. Option C is the only one left so im going to assume its C because its definitely not A, B, or D

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3 years ago
Are there more bones in the arm than in the leg?
hodyreva [135]
They have the same amount but if you count the wrist it was more then the leg and ankle.
6 0
3 years ago
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the mass of element Q found in 1.00 mole of each of four compounds is 38.0 grams, 57.0 grams, 76.0 grams and 114 grams.
NemiM [27]

Missing question: A possible atomic weight of Q is?

A)12.7.

B)19.0.

C)27.5  

D)38.0  

E)57.0.

Answer is: possible atomic weight of Q is B) 19.0.

Molecular weight of first molecule is 38.0 g/mol.

Molecular weight of second molecule is 57.0 g/mol.

Molecular weight of third molecule is 76.0 g/mol.

Molecular weight of fourth molecule is 114.0 g/mol.

All four molecular weights can be division only by 19 to get whole number:

Molecule 1 (38 ÷ 19 = 2), molecule 2 (57 ÷ 19 = 3), molecule 3 (76 ÷ 19 = 4) and molecule 4 ( 114 ÷ 19 = 6).

Molecular formulas are than Q₂, Q₃, Q₄ and Q₆.

5 0
3 years ago
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