Find the molecular mass of methane (CH4). Atomic mass — C = 12 u; H = 1 u.

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TextMolecular Mass of Compounds

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Write the chemical formula and calculate the molar mass of the following:

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The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98 × 10²⁴kg). Which one of the two is heavier and by how many times?

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In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula C₆H₁₂O₆. How many grams of water would be required to produce 18 g of glucose? Compute the volume of water so consumed assuming the density of water to be 1 g cm⁻³.

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Which one of the following has maximum number of atoms?

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Which of the following would weigh the highest?

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What is the fraction of the mass of water due to neutrons?

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