Which of these is a pure substance?

a. ocean water

b. 10 carat gold

c. solid gold

d. cake mix

Write a balanced equation for the reaction of thermal decomposition of solid mercury (II) oxide (also known as mercuric oxide) into liquid mercury and oxygen gas

Which is a way that paleontologists have contributed to humans' understanding of the history of life? They found evidence that climate has not changed significantly. They grouped organisms by the period in which they existed.

Which of the following weak interactions would require the least amount of energy to disrupt? Group of answer choices hydrogen bonds ionic bonds van der Walas interactions disulfide bonds

When using a. csv file for Lookups, the first row in the file represents this?

What is urine made of?

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?