Herbicides:

1. are used to kill insects

2. can increase crop yields by killing weeds

3. supply plants with nutrients and minerals

4. are only used with hybrid plants

Calculate the volume of an object with a mass of 5.45g and a density of 65

How to make neon color using color pencils?

How are isotopes of the same element alike? How are they different?

Molecule a has a molecular weight of 175 and molecule b has a molecular weight of 450. a 0.1 m solution of each is placed on agar gel. which molecule will diffuse more rapidly through the agar?

Which statements describe the effects of the solar wind on Earth? Check all that apply. The solar wind produces the northern and southern lights. The solar wind can cause the formation of new elements.

Which is easier to observe the physical or chemical properties of an object? Support your answer with evidence

How many moles are in 20 grams of sodium

Elements in the noble gas family are considered stable because

A race car driver starts a race with his tires at 13.2 psi at a temperature of 25 C. What will the pressure in the tires be (in psi) when they heat up to 63 C?

What source provides most of the energy consumed in the United States?