Which nuclide is used to investigate human

thyroid gland disorders?

(1) carbon-14 (3) cobalt-60

(2) potassium-37 (4) iodine-131

Stephanie purchased two watermelons. One watermelon weighed 6.95 kilograms. The second watermelon weighed 952 grams more than the first. How much did the second watermelon weigh in grams? 1 kilogram = 1000 grams grams

Sunlight Grass → Rabbit + Snake What is the abiotic factor in this food chain? Sunlight Grass Rabbit Snake

What is the mass of 4.40 moles of magnesium chloride, MgCl2?

How do decomposers get energy? A. by making their own food B. by eating other organisms C. by converting light energy into chemical energy D. by breaking down the waste materials of dead organisms

What minimum mass of H2SO4 would you need?

Which term best describes the type of bonding in magnesium chloride

This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat a. an exothermic reaction b. an endothermic reaction c. absorption reaction d. precipitation reaction

Given the balanced equation representing a reaction: C3H8 (g) + 5O2 (g) = = >3CO2 (g) + 4H2O (g) What is the total number of moles of O2 (g) required for the complete combustion of 1.5 moles of C3H8 (g) ? (1) 0.30 mol (3) 4.5 mol (2) 1.5 mol (4) 7.

What increases in equal steps of one from left to right in the Periodic Table for the elements lithium to neon?

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.