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How many moles are in: a. 10g CO 2 b. 20g CO 2 c. 150g CH 4 d. 12g NH 3 e. 45g Cl 2 f. 40g NH 4 Cl g. 0.8g Na 2 SO 4 h. 35g of water i. 11g H 3 PO 4 j. 500g Mg(NO 3) 2 k. 1kg NaF l. 1.2kg Ca(OH) 2 The equations can be rearranged to:

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2. How many moles are 2.17 × 1025 representative particles of Bromine? 3. How many moles are in 4.65 × 1018 molecules of NO 2 ? 4. What is the mass of 5 moles of Sodium hydrogen carbonate? 5. Calculate the mass in grams of 2.50 mole of Iron(II)hydroxide? 6.

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Calculate the no. of moles and the no. of molecules present in 1.4 g of ethylene gas (C 2 H 4). What is the vol. occupied by the same amount of C 2 H 4. State the vapour density of C 2 H 4. (Avog. No. = 6 × 10 23; C = 12, H = 1] (0.05 moles ; 3 × 10 22 Answer:

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4/8/2015· 5. A metal oxide is reduced by heating it in a stream of hydrogen. It is found that after complete reduction,3.15 g of oxide yielded 1.05 g of metal. From the above data we can say that : (a) the atomic weight of metal is 8 (b) the atomic weight of metal

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Sample of calcium and oxalic acid under acidic conditions form insoluble calcium oxalate precipitation, filtration, the filtrate magnesium sulfate and the alkali metal and heating raw To sulphate, taken with hot water, then filtered and the filtrate evaporated to A.12.2

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17/12/2013· No common ions. Solubility would be higher than the other solutions. Step 2: We can eliminate choice 5. Now we can examine the nuer of moles of the common ions added by the solutions. I''d expect that the more moles of common ions contributed by the

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Calculate the nuer of moles of calcium in 0.250 L of 0.10 M CaCl2. 4.0 moles 2.5 moles 1.0 moles 0.25 moles How do the isotopes hydrogen-1 and hydrogen-2 differ? Hydrogen-2 has one more electron than hydrogen-1.

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question_answer16) On passing 3 ampere of electricity for 50 minutes, 1.8 gram metal deposits. The equivalent mass of metal is [MP PMT 1992] A) 20.5 done clear B) …

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Now, in another part of this question, no of moles of DNA can be calculat ed by using given weight and molecular weight of human DNA. Molecular weight = 650 x 3 x 10 9 = 1.95 x10 12 Da .

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a) 5 moles of NaCl dissolved in 5 l of water b) 0.3 moles of NaCl dissolved in 0.5 l of water c) 2 moles of NaCl dissolved in 250 ml of water d) 175.5g of NaCl dissolved in 500 ml of water e) 11.7g of NaCl dissolved in 10 l of water 4. Calculate the nuer of3 -1

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0.9 moles of NO = 0.9 × 30 = 27 gm of NO 22.4 litres of N2 at NTP = 1 mole of N2 = 28 gm of N¬2 The total nuer of proton''s in 10g of calcium carbonate is a. 3.01 ×1024 b. 4.06 ×1024 c. 2.01 ×1024 d. 3.01 ×1023 Ans : a Total no. of protons in 10g of

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Calcium phosphate (Na) 2 Cr 2 O 7 – Sodium dichromate If the metal is a transition metal, determine the charge of the metal ion by looking at the ratio of the metal ion to the negative ion. Example FeCl 2 Iron (Fe) is a transition metal. Chloride (Cl

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Calcium carbonate carbon dioxide + calcium oxide Chemical amounts are measured in moles (mol) Mass of one mole of a substance in grams = relative formula mass One mole of H 2 O = 18g (1 + 1 + 16) One mole of Mg = 24g

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276 I CHAPTER 8 Quantities in Chemical Reactions mol SiC mol Co mol C mol SiO 6 26. Consider the balanced equation SiC(s) + 2CO(g) SiO(s) + 3C(s) 3 10 Complete the table with the appropriate nuer of moles of reactants and products. If the nuer of

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17. How many moles of sulphur will be produced when 2 moles of H2S react with 11.2 L of SO2 at NTP. 18. Find the volume of CO2 liberated at STP when 10g of 90% pure limestone is completely heated. 19. A metal nitride, M3N2 has 28% nitrogen. What is

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Calcium carbonate (CaCO3), also called calcite, is the principal mineral found in limestone, marble, chalk, pearls, and the shells of marine animals such as clams. a. Calculate the molar mass of calcium carbonate. b. A certain sample of calcium carbonate

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Finding mole and name of elements | Physics Forums

6/6/2010· NO. OF MOLES=given mass/molar mass The Attempt at a Solution molesof element M:moles of compound formed MF2 1 : 1 0.6 : 0.6 1 mole of MF2 contains 2 moles of F 0.6 MOLES WOULD CONTAIN=0.6*2=1.2 now i dnt no how can i find which element

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NaOH:H2SO4 is 2:1 no masses involved. 25cm3 is 0.025 dm3 We''re given volume and molarity for NaOH moles of NaOH= molarity × volume in dm3 = 0.1 × 0.025 = 0.0025 moles moles of H2SO4 = moles of NaOH ÷ 2 = 0.00125 We need molarity.

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No. of moles in 100 g of mixture=76.6100 Let a g ofNO2 is present in mixture. Molesof NO2 +Molesof N2 O4 =Molesofmixture 46a +92100−a =76.6100 "or"a=20.10g Moles ofNO2 in mixture=20.10/46 =0.437 Hope it helps Thankyou and Regards