A sample of ethanol has a mass of 45.6 grams. How many molecules are in the sample?

Hormones taken as medicine can harm fish when the hormones end up in waterways. What does this show about the impact of chemicals on the environment?

There are two different substances with the formula c5h10 that contain a 5-carbon chain. draw them.

Which of the following ions are likely to form? Mn3+ N3- Zn4+ Li2+ K-

If 65.1L of N2 (g) is needed to properly inflate an airbag, how many grams of NaN3 (s) are needed for the reaction

The four following concentrated solutions are each diluted with water to form 200 mL of a dilute solution.

1.87e3 m + 24 m + 5.43e-1 km + 1.561e2 km = km

Which 2 continents have the most obvious fit of the coastlines. subject science

A substance with a ph of 6 is called

56 Explain, in terms of atomic structure, why the elements in Group 2 have similar chemical properties. 131

What must molecules do to react? a. Molecules must heat up b. Molecules must collide c. Molecules must expand to fill their container d. Molecules must interact with a catalyst