Which observation is illustrates the law of conservation mass

The atomic number of chlorine is 17. Give the electron configuration for a neutral atom of chlorine

How does a sample of helium at 15 degree Celsius compare to a sample of helium at 215 K? A) The helium at 15 degrees Celsius has a higher average kinetic energy that the sample at 215 K.

Which best explains why a thick tropical forest filled with large plants typically has a lot of water vapor in the air?

Which answer choices best indicate that a substance has experienced a chemical change?

26.42m Significant figure

If the caffeine concentration in a particular brand of soda is 2.85 mg/oz, drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

Suppose that your favorite AM radio station broadcasts at a frequency of 1600 kHz. What is the wavelength in meters of radiation from the station? (Hint: convert kHz to Hz and find frequency first.)

Reaction rate lab report

The absence of which cell structure would indicate a cell is prokaryotic?

When 0.880 g of an organic compound containing carbon, hydrogen and oxygen is burned completely in oxygen, 1.760 g of co2 and 0.720 g h2 o are produced. what is the empirical formula of the compound?