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Science in Context / Wetenskap in Konteks - 179
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How many moles of sodium hydroxide, NaOH, must be added to 250 cm3 of water to make up a 2 mol.dm-3 standard solution?
Give your answer to 3 decimals. No units are needed | Hoeveel mol natrium hidroksied, NaOH, moet by 250 cm3 water gevoeg word om 'n standaard oplossing van 2 mol.dm-3 te maak?
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie.
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Calculate the concentration of a solution of 2.9 moles of CuSO4 in 3 litres of water.
Give your answer to 3 decimals. No units are needed.
| Bereken die konsentrasie van 'n oplossing van 2.9 mol CuSO4 in 3 liter water.
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie.
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Match the conversions with the correct volume value. | Pas die omskakelings by die korrekte volume waardes. |
Calculate the number of chlorine atoms in 4.6 mole of chloride gas.
Give your answer to 3 decimals. No units are needed. If you need to write your answer in scientific notation, please use "E" in the place of "x10", for instance the value 6.022 x 1023 should be typed as 6.022E23 and 1.602 x 10-19 should be typed as 1.602E-19. | Bereken die aantal chloor atome in 4.6 mol chloor gas.
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie. Indien jy jou antwoord in wetenskaplike notasie moet skryf, gebruik asb "E" in die plek van "x10", bv. die waarde 6.022 x 1023 moet getik word as 6.022E23 en 1.602 x 10-19 moet getik word as 1.602E-19. |
Calculate the number of nitrogen atoms in 5.6 mole of nitrogen gas.
Give your answer to 3 decimals. No units are needed. If you need to write your answer in scientific notation, please use "E" in the place of "x10", for instance the value 6.022 x 1023 should be typed as 6.022E23 and 1.602 x 10-19 should be typed as 1.602E-19. | Bereken die aantal stikstof atome in 5.6 mol stikstof gas.
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie. Indien jy jou antwoord in wetenskaplike notasie moet skryf, gebruik asb "E" in die plek van "x10", bv. die waarde 6.022 x 1023 moet getik word as 6.022E23 en 1.602 x 10-19 moet getik word as 1.602E-19. |
You have 1.2394312308354E+22 nickel atoms. How many moles of nickel is this?
Give your answer to 3 decimals. No units are needed. If you need to write your answer in scientific notation, please use "E" in the place of "x10", for instance the value 6.022 x 1023 should be typed as 6.022E23 and 1.602 x 10-19 should be typed as 1.602E-19. | Jy het 1.2394312308354E+22 nikkel atome. Hoeveel mol nikkel is dit gelyk aan?
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie. Indien jy jou antwoord in wetenskaplike notasie moet skryf, gebruik asb "E" in die plek van "x10", bv. die waarde 6.022 x 1023 moet getik word as 6.022E23 en 1.602 x 10-19 moet getik word as 1.602E-19. |
Calculate the mass of 3.9 mole of gold.
Give your answer to 3 decimals. No units are needed.
| Bereken die massa van 3.9 mol goud.
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie.
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Calculate the number of moles of Cl2 molecules in 4.6 g of chlorine gas.
Give your answer to 3 decimals. No units are needed. If you need to write your answer in scientific notation, please use "E" in the place of "x10", for instance the value 6.022 x 1023 should be typed as 6.022E23 and 1.602 x 10-19 should be typed as 1.602E-19. | Bereken die aantal mol Cl2 molekules in 4.6 g chloor gas.
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie. Indien jy jou antwoord in wetenskaplike notasie moet skryf, gebruik asb "E" in die plek van "x10", bv. die waarde 6.022 x 1023 moet getik word as 6.022E23 en 1.602 x 10-19 moet getik word as 1.602E-19. |
How many moles are there in 4.88 g of AgNO3?
Give your answer to 3 decimals. No units are needed. | Hoeveel mol is daar in 4.88 g AgNO3?
Gee you antwoord tot 3 desimale syfers. Geen eenhede word benodig nie. |
How many grams are there in 0.68 mole iron(II) oxalate, FeC2O4?
Give your answer to 2 decimals. No units are needed. | Hoeveel gram is daar in 0.68 mol yster(II)oksalaat, FeC2O4?
Gee jou antwoord met 2 desimale syfers. Geen eenhede word benodig nie. |