Biology

Biology, 29.07.2019 15:30, neekog11

What is oxygen made up of? molecules or atoms, if molecules, what atoms are present?

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Chemistry, 06.07.2019 21:00, vivi4924

Which statements describe molecules? check all that apply. molecules are made of two or more atoms. a molecules are all the same size b molecules range in size. c molecules are only made of atoms of the same element. d molecules are only made of atoms of different elements. e molecules are made of atoms of the same element or different elements.f

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Physics, 25.07.2019 05:40, Zgt

Consider the incomplete chemical equation, co2(g) + h2o(l) → ? assuming the reactants are balanced and we start with 5 carbon dioxide molecules and 10 water molecules, how many oxygen atoms would you expect to find in the products? a) 10 oxygen atoms b) 15 oxygen atoms c) 20 oxygen atoms d) 25 oxygen atoms

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Chemistry, 21.08.2019 23:50, jasminebailey829

Need as soon as possible! 7. how many atoms are present in a 6.00 g sample of silver? a. 1.07 x 10^-1 atoms b. 6.47 x 10^2 atoms c. 3.35 x 10^22 atoms d. 3.61 x 10^24 atoms 8. how many atoms are present in 2.0 x 10^6 mol of carbon? a. 3.3 x 10^-18 atoms b. 4.0 x 10^-17 atoms c. 1.0 x 10^29 atoms d. 1.2 x 10^30 atoms 9. what mass is present in sample of agno3 containing 3.14 x 10^19 formula units? a. 5.21 x 10^-5 g b. 8.86 x 10^-3 g c. 1.13 x 10^2 g d. 1.92 x 10^4 g 10. how many molecules are present in 36.6 l of so2 gas at stp? a. 1.36 x 10^-21 molecules b. 1.63 x 10^0 molecules c. 1.54 x 10^22 molecules d. 9.84 x 10^23 molecules

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Chemistry, 29.10.2019 02:31, KENYONWASHINGTON868

Need answer asap, will give ! which of the following statements about atoms and molecules is correct? select one: a. only elements contain atoms; all compounds contain molecules. b. only pure substances contain atoms; mixtures contain molecules. c. atoms contain one or more molecules. d. molecules contain two or more atoms. e. molecules are impure substances.

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