What is the density of an object that weighs 2kg and displaces 3 L of water?

How many miles can you run in an hour?

How many hours will it take to cook a meal for 4 people if it 30 minutes to cook a meal for one person?

1.How many hours will it take to cook a meal for 4 people if it 30 minutes to cook a meal for one person? a) 1/2 hour b) 1 hour c) 2 hours d) 3 hours 2. How many scientific figures are in 0.070500? a) 2 b) 3 c) 4 d) 5 3. Convert it into scientiDon't forget about the age old question of erin merz
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fic notation: 0.000405 a) 4.05 × 10−4 b) 4.05 × 104 c) 405 × 106 d) 4.0× 105 4. 0.90759+0.500+1.90+3.30759 a) 6.61518 b) 6.615 c) 6.62 d) 7 5. Convert Km/mL to m/L a) 1.0 × 106 b) 1 c) 1000 d) Cannot be determined 6. If you can run a kilometer in 15 minutes. How many miles can you run in an hour? Round. a) 3 b) 2 c) 1 d) 0.5 7. What is the density of an object that weighs 2kg and displaces 3 L of water? Convert it to grams/ milliliters a) ⅔ b) 3/2 c) 200/300d) 0 8. How many atoms are present in 0.20 mol of Li a) 1.2× 1023 b) 1.2044 × 1023 c) 1 d) 1.2 9. How many mols are in 1.30 × 10 molecules of water? 24 a) 0 b) 0.22 c) 0.216 d) 0.21588 10. How many atoms are in 0.56 mol of H2 a) 6.7× 1023 b) 6.74 × 1023 c) 3.4× 1023 d) 3.0× 1023 11. Balance this reaction: C3H8 + O2 CO2 → + H2O A) C3H8 + O2 CO2 → 3 + H2O B) 3C3H8 + O2 CO2 → + 4H2O C) C3H8 + 5O2 CO2 → 3 + 4H2O D) C3H8 + O2 CO2 → + 2H2O 12. What is the chemical formula for magnesium sulfide? a) MnS2 b) MnCl2 c) Mg2S2 d) MgS 13. What are the six strong acids? Bases? 14. Is KOH soluble (aqueous)? 15. Write the formula for Copper(II) sulfate heptahydrate 16. Find the empirical of a compound within 24.5g of nitrogen and 70.0g of Oxygen. 17. Carbon= 60.00%, Hydrogen=4.48%, Oxygen=35.52% in CxHyOz. What is the empirical formula?18. What mass( in grams)of Iron(III) oxide contains 58.7 grams of Iron? Iron(II) oxide has 69.94% iron by mass. 19. The products of acid and base mixed together are…... 20. TiO2(g) + 2C (s)→Ti(s) +2CO(g). There is 28.6 grams of Carbon, 88.2 grams of titanium oxide and 42.8 of titanium. Find the limiting reactant, and percent yield. 22. Name the acids: a) HCl b) HNO3 c) HBr d) H3PO3 e) HClO f) H2SO4