Which of the following isotopes is most useful for dating plant and animal remains?

A. potassium - 40

B. Uranium - 238

C. Carbon-14

D. Lead-212

Imagine a moving boat making waves in the middle of a pool of water. Also, imagine two observers, one behind the boat and one in front of the boat. Describe how each observer will see the waves generated by the boat and explain their observations.

Calculate the mass of MgCO3 precipitated by mixing 10.00 mL of a 0.200 M Na2CO3 solution with 5.00 mL of a 0.0450 M Mg (NO3) 2 solution.

A tire has a pressure of 325 kPa at 10°C. If the temperature of the tire rises to 50°C and the volume remains constant, what is the new pressure? (Hint: °C 273 = K.)

40 liters is equal to? A. 40 cm3 B. 40 m3 C. 4,000 ml

30.0 mL of 0.50 M NaOH to neutralize 15.0 mL of HNO3, what is the concentration (molarity) of the HNO3?

When you measure something in meters cubed, you are measuring

Low density: low pressure: high density Is which. evaporation? water vapor? condensation / liquid water

Which structures are found on sponges? pores medusae polyps stinging cells

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?