What is the first thing you notice about a person?.-_-

What is the percent mass/volume of a solution having a mass of 65.00 grams and a volume of 600ml

Name at least three types of energy associated with a microwave

Evidence for the existence of neutrons did not come until many years after the discoveries of the electron and the proton. Give a possible explanation.

Which is a substance that could be found in air, water or soil that is harmful to humans or animals? a.) fossil fuel b.) pollutant c.) smog d.) carbon dioxide

What are the key characteristics of a synthesis reaction

How many of the following elements have 2 unpaired electrons in the ground state? C Te Hf Si A) 1. B) 2. C) 3. D) 4.

Which has a higher frequency, a neutron or electron? Why?

1) Identify the intensive properties of a sample of matter: A. mass B. hardness C. color D. volume E. reflectivity

Suppose you have a buffer containing 0.400 M hydrazine and 0.300 M hydrazinium chloride at equilibrium. Then you add 25.2 g of NaOH to 2.0 L of the buffer. What change in pH is caused by the addition of the base? A) 0.99 B) 0.40 C) 8.71 D) - 0.36

The heart is an example of which level of organization within an organism? O cell organ tissue organ system O O