How long will it take for half of Bismuth-214 to decay to lead? (Refer to the Uranium-238 decay chain series.)

5 min

13 min

20 min

27 min

how many grams of barium sulfate will be formed upon the complete reaction of 25.6 grams of barium hydroxide with excess sulfuric acid?

2. What's the kinetic energy of an object that has a mass of 12 kilograms and moves with a velocity of 10 m/s?

Electronegativity can best be defined as Select one: a. the degree to which an electron will leave an atom b. the degree to which an atom wants to gain more electrons c. a relative measure showing how many bonds an atom will form d.

What is the process of breaking down food so that it can be used by living things?

Cl2 (g) + NaBr (g) >Br2 (g) NaCl (aq)

Which of the following is an example of an electric force that occurs in atoms

5. What is another name for Newton's first law in your own words.

The molar mass of magnesium (Mg) is 24.30 g/mol. There are 6.02 1023 atoms in 1 mol. How many atoms are present in 48.60 g of Mg? 3.32 10^-24 atoms 1.96 10^-21 atoms 1.20 10^24 atoms 7.11 10^26 atoms

Add 3.76 * 104 and 5.5 * 102 and write the answer in scientific notation. A. 9.26 * 104 B. 9.26 * 106 C. 3.82 * 106 D. 3.82 * 104

In a dynamic equilibrium between the liquid state and the gas state, what is true about the rate of evaporation? a. greater than rate of condensation b. less than rate of condensation c. equal to rate of condensation d. cannot be determined.