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Questions in chemistry

[Answered] How many significant figures are in 10.65922?

[Answered] Practicing Using Dalton's Law of Partial Pressures Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, [tex]2.8 atm O 2,0.25[/tex] atm Ar , and 0.15 atm He . What is the total pressure inside the cylinder?

[Answered] Examine the effects of eutrophication.

[Answered] Can alguien translate it?: What's the fastest animal in the world?

[Answered] Select the correct answer. What is the correct mathematical relationship between the number of moles, the volume, and the standard molar volume of a substance? A. number of moles = volume - standard molar volume B. number of moles = volume x standard molar volume C. number of moles = volume / standard molar volume D. number of moles = standard molar volume / volume

[Answered] Which of the following is an example of a Brønsted-Lowry base? A. HCl B. [tex]H _3 O ^{+}[/tex] C. [tex]NH _3[/tex] D. [tex]NH _4{}^{+}[/tex]

[Answered] Which element would release the most energy while adding an electron to a neutral atom in the gas phase? A. Na B. Al

[Answered] What happens in a Lewis acid-base reaction? A. An acid donates an [tex]H^{+}[/tex], and a base donates electrons. B. An acid donates an [tex]H^{+}[/tex], and a base accepts an [tex]H^{+}[/tex]. C. An acid donates an [tex]H^{+}[/tex], and a base donates an [tex]OH^{-}[/tex]. D. An acid accepts an electron pair from a base.

[Answered] What kind of reaction is a neutralization reaction? A. An acid-base reaction in which the only product is a base B. An acid-base reaction that produces a salt and an acid C. An acid-base reaction that produces an acid and a base D. An acid-base reaction that leaves no excess H or OH

[Answered] Select the correct answer. What is the percent composition of carbon in glucose ($C_6H_{12}O_6$)? (The molar mass of $C = 12.01, H = 1.0079$ and $O = 16.00$.) A. $3.36 \%$ B. $6.71 \%$ C. $15.20 \%$ D. $40 \%$ E. $53.29 \%$