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Questions in chemistry

[Terjawab] What is the formula of the ionic compound tin(IV) bromide? A. $SnB _4$ B. $SnBr _4$ C. $SnBr _2$ D. $Sn _4 Br$

[Terjawab] Combustion of glucose $\left( C _6 H _{12} O _6\right)$ is the main source of energy for animal cells: $C_6 H_{12} O_6(s)+6 O_2(g) \rightarrow 6 CO_2(g)+6 H_2 O(l) \quad \Delta G_{r x n}\left(37{ }^{\circ} C\right)=-2872 . kJ$ This energy is generally stored as ATP (adenosine triphosphate) molecules, which can release it when convenient by hydrolysis ("water-assisted decomposition") into ADP (adenosine diphosphate) molecules and a phosphate anion, often given the symbol $P_i$ in biochemistry: $\operatorname{ATP}(a q) \rightarrow \operatorname{ADP}(a q)+P_{i}(a q) \quad \Delta G_{r x n}=-35 \text { to } 70 kJ$ The actual amount of free energy released by the hydrolysis of ATP varies, depending on the exact conditions inside the cell. Suppose under certain conditions hydrolysis of ATP actually releases $-64.3 kJ / mol$. Calculate the maximum number of ATPs that could be created from ADPs and $P_i$ by the combustion of a molecule of glucose. Your answer must be a whole number.

[Terjawab] What is the name of this ion? [tex]$NO _3^{-}$[/tex] | nitrate | nitride | |---|---| | hydronium | nitrite |

[Terjawab] What is the formula of nickel (II) acetate?

[Terjawab] Which of these is an example of a chemical property? A. Sodium oxidizes in air. B. Table salt is a white crystal. C. Sodium metal boils at 883 °C.

[Terjawab] Draw the Lewis structure for ethylamine $(C_2H_7N)$. Ethylamine molecules have one amino group. Be certain you include any lone pairs.

[Terjawab] What is the formula of aluminum acetate? $\left( C _2 H _3 O _2\right)_3 Al$ AIAc $AlC _2 H _3 O _{23}$ $Al \left( C _2 H _3 O _2\right)_3$

[Terjawab] Which polyatomic ion has a carbon atom, 3 oxygen atoms and a -2 charge? A. carbocation B. carbide C. carbonate D. carbonite

[Terjawab] What is the mass number of this element? [tex] { }_{14}^{29} Si [/tex] A. 29 B. 43 C. 14 D. 15

[Terjawab] Select the best answer for the question. 15. In which of the following cases does an atom have a positive charge? A. There are more electrons than neutrons. B. There are more neutrons than electrons. C. There are more protons than electrons. D. There are more electrons than protons.