Plz answer all question by showing steps plz ans fast

Plz answer all question by showing steps plz ans fast NEW 1/52 13. You are supplied with a gas containing 0.32 g of oxygen. Calculate the number of moles and molecules present in it. 14. ne mass of a litre of oxygen at standard conditions oftemperature and pressure is 1.43 gand of SO: is 2.857 g. (O How many molecules of each gas are there in this volume ? What is the mass in grams of a single molecule of each gas ? (iii) What are the molecular masses of S02 and 02 respectively ? IS. mass of 350 cm3 of a diatomic gas at 273 Kat 2 atmospheres pressure isone gram. Calculate the of one atom of the gas. 16. HOW many atoms and molecules Of phosphorus are present in 124 g Of phosphorus (P 4) ? 17. What is the mass ofa water molecule in gram ? How many molecules are present in one drop of pure wate which weighs 0.05 g ? If the same drop of water evaporates in one hour, calculate the number of molecule; leaving the liquid surface per second. 18. What is the mass of carbon present in ().5 mole Of ? 19. The cost of table salt (NaCl) and table sugar (C12H22011) is Rs. 2 per kg and Rs. 6 per kg resrrctively Calculate their costs per mole. 20. Chlorophyll, the green colouring matter Of plants responsible for photosynthesis. contains 2.68% Of magnesium by weight. Calculate the number of magnesium atoms in 2.0 g of chlorophyll. 21. How many years would it take to SFnd Avogadro's number of at the rate of 10 lakh rurres 22. Calculate the total number of electrons present in 14 g of nitrogen gas. 23. What is the mass in grams of one molecule ofcaffeine (C8H10N402) ? 24. How many molecules approximately do you expect to be present in (i) a small sugar crystal which weighs 10 mg (ii) one drop of water with 005 cc volume ? 25. 9-7 x 1017 atoms Of iron weigh much as cc Of H2 at S.T.P. What is the atomic mass of iron ? 1. 22.0 g(iii) 177.5 g - mole (ii) — mole 2. (i) 0.1 mole (ii) 0.166 mole (i) g (ii) 5.645 g (iii) 32.0 g (iv) 147.0 g 4. (i) 50.0 g (ii) 70.0 g (iii) 10.8 g (iv) 1.992 g. Hence. S g atoms of nitrogen weigh most 5. 3.011 x 1023 molecules 6. 55g 8. 408.9 cm3 9. C 7.226 x 1022 atoms. H 1.325 x 1023 atoms, O —6-624 x 1022atoms 10. (05.314 x 10-23 g (ii) 2.823 x 10-23 g 12. (i) 13.6 g (ii) 0.8 g atoms of H and 0.4 g atoms of S (iii) 2.4088 x 1023 molecules (iv) 4.8176 x 1023 atoms of H and 2.4088 x 1023 atoms of S 13. 0.01 mole. 6022 x 1021 molecules 14. (i) 2.688 x 1022 molecules 02 5.320x 10-23 g and S02- 10.629 x 10-23 (iii) 02 32032 u and SOZ 63.997 u 1'. 24088 x 1023 atoms and 602