What is the valence electron configuration of In (element #49)?
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Which of the following is true when a solution is diluted? I…
Which of the following is true when a solution is diluted? I. The amount of solute remains the same. II. The concentration of the solution decreases.
Given that 1 inch (in) = 2.54 cm, 33.8 in2 = ________ cm2
Given that 1 inch (in) = 2.54 cm, 33.8 in2 = ________ cm2
In general, electronegativity ____ down a group and ____ fro…
In general, electronegativity ____ down a group and ____ from left to right across a period.
What is the approximate measure of the indicated H-C-C bond…
What is the approximate measure of the indicated H-C-C bond angle in the following molecule?
What is the mass of NaNO3 (molar mass: 84.99 g/mol) needed t…
What is the mass of NaNO3 (molar mass: 84.99 g/mol) needed to prepare 500.0 mL of 1.30 M NaNO3 solution?
In general, ionization energy ____ down a group and ____ fro…
In general, ionization energy ____ down a group and ____ from left to right across a period.
The temperature of a 25.0-g block of metal increases from 25…
The temperature of a 25.0-g block of metal increases from 25.0°C to 469.4°C after it absorbs 10.0 kJ of heat. What’s the specific heat of the metal?
In the reaction, Fe (s) + 2 HCl (aq) → FeCl2 (aq) + …
In the reaction, Fe (s) + 2 HCl (aq) → FeCl2 (aq) + H2 (g) _________ is the oxidizing agent.
What is the theoretical yield of Fe2O3 (molar mass: 159.7 g/…
What is the theoretical yield of Fe2O3 (molar mass: 159.7 g/mol) when 60.0 g of Fe (molar mass: 55.85 g/mol) reacts with excess amount of O2? 4 Fe (s) + 3 O2 (g) –> 2 Fe2O3 (s)