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

Fossil fuel consists of coal, oil, and natural gas that have been formed from the remains of plants and animals that died millions of years ago. What was the source of the energy used to produce the high-energy molecules in these fossil fuels?

What is the main difference of the food pyramid and My Plate

Find the density of a material given that an 88.1g sample occupies 19.7ml

How can 100ml of sodium hydroxide solution with a ph of 13.00 be converted to a sodium hydroxide solution with a ph of 12.00?

If you have 3.52 moles of baking soda (NaHCO3), then about how many molecules of baking soda fo you have? A) 3.45 x 10^24 B) 2.12 x 10^24 C) 6.02 x 10^23 D) 1.23 x 10^24

Describe your observations of the original solutions. Describe your observations when the silver nitrate was added to the sodium chloride solution.

A gas occupies 18.5L at stp. what volume will it occupy at 735 torr and 57°c?

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers.

Which best identifies why the rusting of an iron nail in the presence of water and oxygen is in oxidation-reduction reaction

In the laboratory hydrogen gas is usually made by the following reaction:Zn (s) + 2HCl (aq) = H2 (g) + ZnCl2 (aq) How many liters of H2 gas, collected over water at an atmospheric pressure of 752 mmHg and a temperture of 21 Co, can made from 3.