How many neutrons does element X have if its atomic number is 44 and its mass number is 151?

What mostly contains the atoms of two or more types of elements. The number of atoms can range from two to many thousands

Density is an intensive physical property because the density of a given substance does not change with the size of the sample. True or False

What volume of a 1.0 M HCl is required to completely neutralize 25.0 ml of a 1.0 M KOH?

How do you solve graduated cylinder questions?

A molecular biologist measures the mass of cofactor a in an average yeast cell. the mass is 74.06 pg. what is the total mass in micrograms of cofactor a in a yeast colony containing 105 cells

The Doppler effect indicates that the universe is expanded because A. light from other galaxies is different colors B. light from other galaxies are blue shift C. light from other galaxies are red shift D. light from other galaxies is the same color

2. What is the importance of meiosis and fertilization in sexual reproduction?

Molecules are the smallest units of matter with the characteristic properties of a substance. a. True b. False

For the following hypothetical reaction: 3A + 2B - > 3C. How many moles of C can you produce with 5 moles of A and excess B?

Which of the following statements is true of enzymes? A. they change shape after a reaction B. They don't provide an active site for substrates to bind in a reaction C. They're unusable after a reaction D.