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olga_2 [115]
3 years ago
15

Use your periodic table to answer the following questions. Pay attention to the spelling of the element names and make sure to w

rite the chemical symbols correctly. 1. What metal is found in the group 1 and period 4? __________________ 2. What metalloid is found in the group 16 and period 5? ______________ 3. What nonmetal is found in the group 17 and period 2? ______________ 4. In what group will you find copper? ____________________ 5. In what group will you find krypton? ____________________ 6. In what group will you find mercury? _______________________ 7. What is the symbol for chlorine? ___________________ 8. What is the symbol for lead? _____________________ 9. What is the symbol for tungsten? ______________________ 10. What is the symbol for antimony? _______________________ 11. What is the symbol for sodium? ______________________ 12. In what period will you find gold? __________________________ 13. In what period will you find silver? _________________________ 14. In what period will you find oxygen? _________________________ 15. In what groups will you find metalloids? ______ ______ _____ _____ 16. What element has the symbol H? _______________________ 17. What element has the symbol He? _______________________ 18. What element has the symbol Ca? ________________________ 19. What element has the symbol Co? ________________________ 20. What element has the symbol C?
Chemistry
1 answer:
Novay_Z [31]3 years ago
3 0

Explanation:

1. K (Potassium)

2. Te (Tellurium)

3. F (Flourine)

4. group 11, period 4

5. group 18, period 4

6. group 12, period 6

7. Cl

8. Pb

9. W

10. Sb

11. Na

12. period 6, group 11

13. period 5, group 11

14. period 2, group 16

15. Groups 13–16 of the periodic table contain one or more metalloids

16. Hydrogen

17. Helium

18. Calcium

19. Cobalt

20. Carbon

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Compound X has a molar mass of 316.25 g*mol^-1 and the following composition:
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sulfur & 60.82%

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The given molecule of phosphorus and sulfur has molar mass --- 316.25 g.

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element:              phosphorus                       sulfur

co9mposition:      39.185%                            60.82%

divide with

atomic mass:          39.185/31.0 g/mol           60.82/32.0g/mol

                              =1.26mol                           1.90mol

smallest mole ratio:   1.26mol/1.26mol =1      1.90mol/1.26 mol =1.50

multiply with 2:          2                                         3

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Hence, the molecular formula of the compound is :

2 x (P2S3)

=P_4S_6

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