Which of the following equations describes a single-replacement reaction?

A. 2N2O5 (g) = O2 (g) + 4NO2 (g)

B. 2Na (s) + Cl2 (g) = 2NaCl (s)

C. Cl2 (g) + 2Kl (s) = 2KCl (s) + l2 (g)

D. H2 (g) + Br2 (g) = 2HBr (g)

Three solutions 39.0 mL of 0.2 M KNO₃; 59.0 mL of 0.9 M Ca (NO₃) ₂; and 63.0 mL of 0.345 M KCl were poured together to make one new solution. What is the concentration of Cl⁻ after mixing? Answer in units of mol/L.

A. Which statement accurately describes part of the dissolving process of a polar solute in water? B. Solute molecules repel water molecules. C. Water molecules surround solute molecules. D.

Сколько граммов соли образуется, если в раствор, содержащий 9,8 г серной кислоты, добавим другой раствор, имеющего 10 г гидроксида натрия?

What are the products of photosynthesis

Question 1 Write the next three numbers in the sequence 2, 10, 50, 250,-

What is the oxidation number for Our in NaHCO3?

To determine if a reaction is exoteric a student should use

Which of the following are physical properties of a penny? Choose all that are correct. Select one or more:a. Slightly red in color. b. Conducts electricity very well. c. Reacts to oxygen when heated. d. Resists corrosion from most acids.

NO2 and N2O4 undergo the reaction shown. When a sealed container of NO2 reaches chemical equilibrium, which must be true? A) No N2O4 is present. B) No chemical reactions are occurring. C) The rates of the forward and reverse reactions are equal.

What differences did you notice in the different states of water