The light of a star that can be seen from Earth A. Constellation B. Apparent Magnitude C. Absolute magnitude

100 g of 20% salt solution is mixed with 200g of 10% salt solution. Find out the concentration of the resulting solution.

What have humans been able to do that other species cannot? 1. return from extinction 2. experience exponential growth 3. reach biotic potential 4. increase the carrying capacity of their environment

If a decrease in temperature accompanies a reaction, what occurred? Question 1 options: Energy was released. Energy was destroyed. Energy was created. Energy was absorbed.

How many Oxygen (O) atoms are in the following? CO2 Carbon Dioxide + H2O 4 3 2

Gunther needs a 75% concentrated solution. When making his solution at room temperature, he could only make a solution that was 70% before the solute settled out. What could he do to make his solution reach 75%?

What is group 18 on the periodic table called? a. noble gases b. metalloids c. nonmetals d. metals

Explain the difference between the greenhouse effect and global warming.

Ionic bonds are formed between metals and non-metals to form salts. a. True b. False

In a closed or isolated system, matter can not be created or destroyed. It can change Forms but is conserved true or false

Explain in terms of element classification, why K2O is an ionic compound