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Svetlanka [38]
3 years ago
10

What is unusual about solid water compared to solids of other materials?

Chemistry
1 answer:
fomenos3 years ago
3 0
Solid water is completely clear
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A graduated cylinder is filled with 34.4 mL of water. A toy Car that weighs 43.672-g is Gently placed in the cylinder and the wa
Thepotemich [5.8K]

Answer:9.49g/mL

Explanation:

Mass of toy = 43.672g

Volume of water = 34.4mL

Volume of toy + volume of water = 39mL

Volume of toy = 39 — 34.4 = 4.6mL

Density = Mass /volume

Density = 43.672/4.6 = 9.49g/mL

8 0
3 years ago
How is sodium peroxide formed?​
nordsb [41]

Answer:

Sodium peroxide can be prepared on a large scale by the reaction of metallicsodium with oxygen at 130–200 °C, a process that generates sodium oxide, which in a separate stage absorbs oxygen: 4 Na + O2 → 2 Na2O. The ozone oxidizes the sodium to form sodium peroxide.

8 0
3 years ago
Please help! (The question is in the picture above)
goldfiish [28.3K]
(i) The pH of HCl is between 0 and 2.
(ii) the presence of Carbon Dioxide turns lime water milky or sees a white precipitate form on the surface of the lime water.  Lime water is CaOH and when it reacts with Carbon Dioxide it forms a white solid (precipitate) Calcium Carbonate.
Ca(OH)_{2}  _{(l)}   +   CO_{2} _{(g)}  -----\ \textgreater \   CaCO_{3} _{(s)}  +  H_{2}O_{(l)} 
7 0
3 years ago
Which element has a complete valence electron shell? selenium (Se) oxygen (O) fluorine (F) argon (Ar)
kirill115 [55]

Answer:

oxygen (O)

Explanation:

.

3 0
3 years ago
Read 2 more answers
If a particular ore contains 55.4 % calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosp
gizmo_the_mogwai [7]
 The ore contains 55.4% calcium phosphate (related to the mineral apatite) so the amount of Ca3(PO4)2 is 55.4%x=1000g so x=1000/0.554= 1.805kg. Now for the % of P in this amount of calcium phosphate, use all the masses of the elements in Ca3PO4= Ca=40.078 x 3= 120.23 and (PO4)2= (30.974+64)2=189.95  (NB oxygen is 16 mass x 4 =64) so the total mass is 310.2 and we have 61.95 of P (Pmass x 2) so 61.95/3102.= 0.19 or 19% P. So of the 1.805 x 0.19= 0.34kg of phosphorus.
8 0
3 years ago
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