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Questions in chemistry

[Answered] What charge does an ion have if it has more protons than electrons? A. A net positive charge B. Neutral, since protons are inside the nucleus C. A net negative charge D. No charge

[Answered] Brown eyes are dominant over blue eyes. If two brown-eyed parents have a child with blue eyes, what does it mean about the parents’ genotype? A. One must be homozygous recessive. B. One must be heterozygous. C. They must both be heterozygous. D. They must both be homozygous dominant

[Answered] Consider the reaction: [tex]2 HF(g) \longleftrightarrow H_2(g)+F_2(g)[/tex] At equilibrium at 600 K, the concentrations are as follows: [tex]\begin{array}{l} {[HF]=5.82 \times 10^{-2} M} \\ {\left[H_2\right]=8.4 \times 10^{-3} M} \\ {\left[F_2\right]=8.4 \times 10^{-3} M} \end{array}[/tex] What is the value of [tex]K _{ eq }[/tex] for the reaction expressed in scientific notation? A. [tex]2.1 \times 10^{-2}[/tex] B. [tex]2.1 \times 10^2[/tex] C. [tex]1.2 \times 10^{-3}[/tex]

[Answered] Choose the products that complete the reaction. The chemical equations may not be balanced. [tex]HCl + NaOH \rightarrow[/tex] ? A. [tex]NaCl + H _2 O[/tex] B. [tex]NaCl + CO _2+ H _2 O[/tex] C. [tex]NaCl + H _2[/tex]

[Answered] What would the final freezing point of water be if 3 mol of sugar were added to 1 kg of water ([tex]K_f=1.86^{\circ} C /( mol / kg )[/tex] for water and [tex]/=1[/tex] for sugar)? A. [tex]+5.58^{\circ} C[/tex] B. [tex]-1.86^{\circ} C[/tex] C. [tex]-0.62^{\circ} C[/tex] D. [tex]-5.58^{\circ} C[/tex]

[Answered] Consider this reaction: $KOH + HBr \rightarrow KBr + H _2 O$ Which statement is most likely true about HBr? A. It turns blue litmus red. B. It reacts with carbon dioxide to form a carbonate. C. It feels slippery.

[Answered] Which of the following measurements are not equivalent? [tex]$25 mg =0.025 g$[/tex] [tex]$183 L=0.183 kL$[/tex] [tex]$150 ms=0.150 s$[/tex] [tex]$84 cm=8.4 mm$[/tex] [tex]$24 dL =2.4 L$[/tex]

[Answered] Which released by the breakdown of CFCs in the atmosphere is responsible for the destruction of the ozone layer? A. Fluorocarbonate B. Carbon monoxide C. Carbon fluoroxide D. None of these is correct E. Catalytic fluoroxide

[Answered] Consider the following reaction and identify the product (P): 3-Methylbutan-2-ol (CH3-CH(CH3)-CH(OH)-CH3) reacts with HBr. Possible products include: 1) CH3-CH(CH3)-CH(Br)-CH3 2) CH3-C(CH3)2-CH2Br 3) Br-CH3-C(CH3)-CH2-CH3 4) CH3CH=CH-CH3 Identify the correct product (P).

[Answered] A student requires 2.00 L of [tex]$0.100 M NH _4 NO _3$[/tex] from a [tex]$1.75 M NH _4 NO _3$[/tex] stock solution. What is the correct way to get the solution? Use [tex]$M_j V_j=M_f V_f$[/tex]. A. Measure 114 mL of the 1.75 M solution, and dilute it to 1.00 L. B. Measure 114 mL of the 1.75 M solution, and dilute it to 2.00 L. C. Measure 8.75 mL of the 1.75 M solution, and dilute it to 2.00 L. D. Measure 8.75 mL of the 0.100 M solution, and dilute it to 2.00 L.