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__mg(s) + __hci(aq) *arrow pointing right* __mgci2(aq) + __h2(g)

1. after balancing the reaction above, what is the coefficient for hydrogen (h2)? * 2 points
1
2
3
4

2. what type of reaction is this? * 2 points
synthesis
decomposition
single replacement
double replacement

use the following reaction to answer questions 3-4.
n2 + h2 *arrow pointing right* nh3

3. after balancing the reaction above, what is the coefficient for h2? * 2 points
1
2
3
4

4. what type of reaction is this? * 2 points
synthesis
decomposition
single replacement
double replacement

5. which is a sign that a chemical reaction occurred? * 2 points
color change
formation of a gas (bubbles)
temperature change
all are signs of a chemical reaction

6. which of the following is not a strong acid? * 2 points
h2s
hcl
hno3
hi

7. which of the following is not a property of an acid? * 2 points
tastes sour
usually reacts with a metal changes
the color of an indicator
feels slippery

8. detergent has a ph of about 10. is detergent acidic, basic, or neutral? * 2 points acidic
basic
neutral

9. which of the following is a balanced chemical equation for the synthesis of nabr from na and br2? * 2 points
na + br2 --> nabr
2na + br2 --> nabr
na + br2 --> 2nabr
2na + br2 --> 2nabr

10. which of the following is not a common property of bases? * 2 points
feels slippery
tastes bitter
reacts with metals
changes colors of indicators

11. hydrochloric acid would have a ph in what range? * 1 point
0-6
7
8-14

12. a brand of shampoo has a ph between 5-6. what would it be considered to be? * 2 points
strong acid
weak acid
neutral
weak base
strong base

13. when a strong acid reacts complete with a strong base (a neutralization reaction), what compounds are always formed? * 2 points salt and water salt only metal oxides and water metal oxides only 14. which ph indicates a solution of a base? * 1 point
ph = 1
ph = 3
ph = 7
ph = 12