Which statement is true about the properties of the majority of the elements in the far left column of the periodic table?

A.

They have no luster

B.

They are highly reactive.

C.

They have low heat conductivity.

How is the earths magnetic field evidence that convection is occurring?

Which of the compounds below is an example of a network solid? O Sg (s) SiO2 (s) MgO (s) NaCl (s) O C25H52 (s)

The air pollutant emitted by burning coal includes which of the following? A. sulfur oxides B. nitrogen oxides C. ozone D. carbon monoxide E. none of the above

Weight in grams of NaCl

Plants perform photosynthesis during the night only during an eclipse only when the sun is not out during the day

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.