At 25°C, the pH of a neutral solution is 7.

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

10 g of Na = 0.434 moles. 2Na + H2SO4 → Na2SO4 + H2. 0.434 moles of Na2SO4 = 0.434 * 142 g = 61.6 g.

23 g of Na = 1 mole. 1 mole of Na produces 1 mole of NaCl = 58.5 g.

23 g of Na = 1 mole. 1 mole of Na produces 1 mole of NaCl = 58.5 g.

1 mole of CO2 contains 1 carbon atom and 2 oxygen atoms, totaling 3 atoms.

C2H5OH has 2 carbon, 6 hydrogen, and 1 oxygen atom, totaling 7 atoms.

C4H10 has 4 carbon atoms and 10 hydrogen atoms, totaling 14 atoms.

The decomposition of CaCO3 produces CaO and CO2: CaCO3 → CaO + CO2. This results in 1 mole of gas (CO2) being produced.

The decomposition reaction is CaCO3 → CaO + CO2. This produces 1 mole of CaO and 1 mole of CO2, totaling 2 moles of gas.

The ideal gas constant R is 0.0821 L·atm/(K·mol).

R can have different values depending on the units used, including 0.0821 L·atm/(K·mol), 8.314 J/(K·mol), and 62.36 L·mmHg/(K·mol).

At STP, 1 mole of an ideal gas occupies 22.4 liters.

At STP, 1 mole of an ideal gas occupies 22.4 liters.

At STP, 1 mole of gas occupies 22.4 L. Therefore, 4 moles occupy 4 x 22.4 L = 89.6 L.

At STP, 1 mole of an ideal gas occupies 22.4 liters.

At STP (Standard Temperature and Pressure), 1 mole of an ideal gas occupies 22.4 liters.

At STP, 1 mole of gas occupies 22.4 liters.

Volume = moles x volume per mole = 4 moles x 22.4 L/mole = 89.6 L.

C2H5OH + 3O2 → 2CO2 + 3H2O. 2 moles of C2H5OH produce 4 moles of CO2. Volume = 4 * 22.4 L = 89.6 L.

The reaction is Na2CO3 + 2 HCl → 2 NaCl + H2O + CO2. 0.1 moles of Na2CO3 requires 0.2 moles of HCl. Volume = moles / concentration = 0.2 moles / 0.5 M = 0.4 L or 400 mL.

Using the formula Molarity (M) = moles/volume (L), we have 0.5 M = 1 mole/volume. Therefore, volume = 1 mole / 0.5 M = 2 L.

Using the formula Molarity (M) = moles/volume (L), we rearrange to find volume = moles/Molarity. Thus, volume = 1 mole / 0.5 M = 2 L.

The reaction between NaOH and HCl is 1:1. Therefore, to neutralize 0.5 moles of HCl, 0.5 moles of NaOH are required, which corresponds to 0.5 L of 1 M NaOH solution.

The reaction of an acid with a carbonate produces carbon dioxide gas.

C4H10 (butane) has the highest boiling point due to its larger molecular size and greater van der Waals forces.

Bases typically have a bitter taste and turn litmus paper blue.

A solution has a uniform composition throughout.

A strong acid completely ionizes in solution.

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.