The element oxygen, represented by the symbol O, is classified as

A. a compound.

B. a mixture.

c. a pure substance.

D.

a solution.

Vinegar is commonly sold as a 5 percent by volume solution of acetic acid in water. This measurement means which of the following?

Americans eat too much salt (NaCl). A healthy adult should eat no more than 6 g of salt in one day. Use this information to answer the following questions. (Round atomic masses to the nearest tenth unit.) a. What is the molar mass of NaCl? b.

According to the law of conservation of momentum, which statement is true about a system that has no external forces acting on it? O A. An increase in momentum before a collision must equal an increase in momentum after the collision. O B.

All information on a line graph is as precise as the information in the data table. True or False

Hola, por favor necesito ayuda con estos ejercicios de quimica: 1. El radio atómico del Magnesio (Mg) es 1,36 Å y su masa atómica es 24,312 g. Cuál es la densidad del átomo en kg/m3. Resp. 3,8x103 kg/m3 2.

How many Joules are equivalent to 75 Calories?

How do you balance nuclear equations?

Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction

How do the relative concentrations of hydronium ions and hydroxide ions compare in acidic solution?

Give the name of the orange metal visable after one week