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Questions in chemistry

[Terjawab] Which is a characteristic of a homogeneous mixture that is a liquid? A. It exhibits the Tyndall effect. B. Brownian motion is not visible in it. C. It cannot be separated using filtration. D. It has at least two phases.

[Terjawab] Alkalinity tests on a mud give a P_m value of 5.0 and a P_f value of 0.7. Determine the approximate amount of undissolved lime in the mud. The volume fraction of water in the mud is 80%.

[Terjawab] A compound is $40 \%$ carbon, $6.7 \%$ hydrogen, and $53.3 \%$ oxygen. What is the empirical formula? A. $CH _2 O _2$ B. $CH _2 O$ C. $C _2 H _4 O$ D. $C _2 H _4 O _2$

[Terjawab] What do aerosols, the atmospheric particles, consist of? A. Solid and liquid B. Water and carbon dioxide C. Gas and water vapor D. Nitrogen and oxygen

[Terjawab] Which quantity is held constant when working with Boyle's, Charles's, and Gay-Lussac's laws? A. volume B. moles C. pressure D. temperature

[Terjawab] Consider the reaction below. [tex]H_2(g)+CO_2(g) \rightarrow H_2 O(g)+CO(g)[/tex] At equilibrium at 600 K, the following are true. [tex]\begin{array}{l} {\left[CO_2\right]=9.5 \times 10^{-4} M} \ {\left[H_2\right]=4.5 \times 10^{-2} M} \ {\left[H_2 O\right]=4.6 \times 10^{-3} M} \ {[CO]=4.6 \times 10^{-3} M} \end{array}[/tex] What is the value of the equilibrium constant for this reaction in correct scientific notation? A. [tex]4.9 \times 10^{-3}[/tex] B. [tex]4.9 \times 10^{-2}[/tex] C. [tex]4.9 \times 10^{-1}[/tex]

[Terjawab] Gas Laws Fact Sheet | Ideal gas law | [tex]$P V=n R T$[/tex] |

[Terjawab] Mean value of temperatures = \(\frac{t_1 + t_2}{2}\) °C. Boiling point of water = ______ °C. The melting point of ice = ______ °C.

[Terjawab] Select the most likely product for this reaction: [tex]LiOH ( aq )+ HNO _3( aq ) \rightarrow[/tex] ? A. [tex]CO _2(g)+ H _2 O ( l )[/tex] B. [tex]LiNO _3( aq )+ H _2 O ( l )[/tex] C. [tex]LINO _3( aq )+ H _2(g)+ O _2(g)[/tex]

[Terjawab] Which of the following compounds contains the lead(II) ion? [tex]$Pb _2 O$[/tex] PbO [tex]$PbCl _4$[/tex] [tex]$Pb _2 S$[/tex]