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Questions tagged 'Moles'

32 questions

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Anonymous

Feb 20, 2025

How many moles of Pb are in 4.71 x 10^21 Pb atoms?

How many moles of lead (Pb) are present in 4.71 x 10^21 atoms of Pb? I have calculated possible answers, which include 0.00782, 2.84 x 10^45, 207.2, and 6.022 x 10^23. Could you help me determine the...

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Anonymous

Jan 28, 2025

DETERMINE THE NUMBER OF MOLES OF H IN EACH SAMPLE? PLEASE! NEED BIG HELP?!?

I need assistance in determining the number of moles of hydrogen (H) in each of the following compounds: a. 4.67 mol H₂O b. 8.39 mol NH₃ c. 0.117 mol N₂H₄ d. 35.8 mol C₁₀H₂₂ Could someone please hel...

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Anonymous

Jan 27, 2025

The coefficients in a balanced chemical equation always can express the ratio of

The coefficients in a balanced chemical equation represent the ratio of moles of reactants and products involved in the reaction. Before performing stoichiometric calculations, it is essential to ensu...

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Trace Hoeger

Jan 13, 2025

What is the mass of 18.8 moles of helium (He) atoms?

What is the mass of 18.8 moles of helium (He) atoms? a) 0.213 g b) 4.70 g c) 37.6 g d) 75.2 g Which of the following has the greatest mass in grams? 1) 1 atom of gold (Au) 2) 0.5 moles of lead (Pb)...

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Anonymous

Jan 04, 2025

Exactly 1 mol of CaCr2O7 contains how many moles of Ca, Cr, and O?

How many moles of calcium (Ca), chromium (Cr), and oxygen (O) are present in exactly 1 mole of calcium dichromate (CaCr2O7)?

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Anonymous

Jan 03, 2025

What is the volume of 1.9 moles of chlorine gas (cl2) at standard temperature and pressure (stp)?

What is the volume of 1.9 moles of chlorine gas (Cl₂) at standard temperature and pressure (STP)? Options: - 12 L - 22.4 L - 43 L - 81 L

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Anonymous

Jan 01, 2025

What is the mass in grams of 5.90 mol C8H18?

What is the mass in grams of 5.90 moles of C8H18? A) 0.0512 g B) 19.4 g C) 89 g D) 673 g Please indicate your answer by selecting either A, B, C, or D. Thank you! 😊