The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?

A. 24 candelas

B. 144 candelas

C. 72 candelas

D. 96 candelas

Which metal is more active than tin but less active than zinc? Base your answer off the choices

How many moles of nitrogen gas are in a 10.0 L container at STP? a. 0.45 moles b. 22.4 moles c. 10.0 moles d. 6.02 x 1023 moles

What makes a theory scientific? this is for earth and space science.

2. What is the electron configuration of an electrically neutral atom of magnesium?

Consider a beaker containing a saturated solution of PbI2 in equilibrium with undissolved PbI2 (s). (a) If solid KI is added to this solution, will the amount of solid PbI2 at the bottom of the beaker increase, decrease, or remain the same?

What is the correct formula when Aluminum and Nitrogen are combined? a. Al3N b. AlN c. AlN3 d. Al2N

1-Bromobutane reacts with water to form 1-butanol according to the following equation. C4H9Br (aq) + 2 H2O (l) → C4H9OH (aq) + H3O + (aq) + Br - (aq) The following is a proposed mechanism for the reaction.

Which of the following statements is true? A. Transverse waves move particles parallel to the direction of energy. B. Longitudinal waves move particles at right angles to the direction of energy. C.

The electron configuration 1s22s22p63s23p6 represents which noble gas?

What feature distinguishes a neutral atom from an ion