Luke can paint 91 portraits in 7 weeks. How many portraits can Luke paint in 4 weeks?7

Given that the molar mass of acetic acid is 60.0 grams and the density of the vinegar solution is 1.01 grams per milliliter determine the mass percent of acetic acid in the vinegar

How many moles of aluminum oxide (Al2O3) are in a sample with a mass of 204.0 g? The molar mass of aluminum oxide (Al2O3) is 102.0 g/mol.

Express the following quantity in scientific notation. The answer needs to have the correct number of significant figures. 21,300,000 mL

Which characteristic is shared by all arthropods

A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scientist is able to duplicate the results. The statement by Dr. Sigma is ___.

During which two processes does a substance release energy? 1. | freezing and condensation freezing and melting evaporation and condensation evaporation and melting Submi

Lake michigan holds 1.35 x 10^15 gallons of water

N which orbitals would the valence electrons for selenium (Se) be placed? s orbital and f orbital s orbital only s orbital and p orbital d orbital only

Anne prepares a solution of copper nitrate with a concentration of 30 g/dm³. What mass of copper nitrate did she add to 100cm³ of water, in grams?

Chemists classify an element an element as a metal based on what physical properties