How many neutrons does an element have if its atomic number is 47 and its mass number is 150?

What is the resistance of a fluid on an object?

Convert 44 centimeters to meters. A. 4 m B. 4.4 m C. 0.44 m D. 0.044 m

How is a chemical reaction affected by the addition of a catalyst? (1) The activation energy decreases. (2) The heat of reaction increases. (3) The number of collisions between particles decreases. (4) The potential energy of the reactants increases.

The mass number of an atom is equal to which of the following? Question 4 options: A. the number of protons plus the number of electrons in an atom B. the number of electrons circling the nucleus of an atom C.

When swimmers push against the wall of a pool with their feet, they are pushed away from the wall. Which of Newton's laws explains why this occurs? a. Newton's first law b. Newton's second law c. Newton's third law d. all of Newton's laws

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.

The number of grams present in 1.35 mol of Fe is

Which can associate a suspect's gun with a crime?