Bead Mixture
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Bead Mixture
Science help please? first person to give all the RIGHT answers gets the points?
15. what is the total number of atoms in the following formula?
CaBr2
a.4
b.3
c.2
d.1
16.What is the best name for CaBr2?
a.monocalcium dobromide
b.calcium bromide
c.calcium dibromide
d.bromocalcium
17.You are presented with a mixture of iron beads and iron fillings. How can you seperate them?
a.use a magnet
b.dissolve the fillings in water
c.use a screen
d. distillation
18. The specific heat of silver is 0.06 cal/g°C. Fifty grams of silver will require ______ calories to raise the temperature to 1°C.
a. 0.06
b. 3
c. 30
d. 833
An acid sultion contains more ________ ions than ________ ions.
a.hydroxide
b.hydronium
15. B
1 Ca + 2 Br = 3 atoms
16. B
All other answers are incorrect names.
17. C
Iron beads are much larger than the fine iron filings. The filings can easily pass though the screen while the iron beads stay on top the screen.
Using magnet will attract both beads and filing because they are both iron. You won't be able to separate them.
Dissolving filings in water is impossible. Iron filings are not soluble in water.
Distillation can't be done on iron beads and filings. They don't evaporate to gas.
18. B
0.06 x 50 = 3
19. ...more HYDRONIUM ions than HYDROXIDE ions.
Acids have low pH meaning they have high hydronium ions.
There you go young miss!
Enjoy chemistry!
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Categories: Jewellery Making