3 natural chemicals a part of our life

Which of the following is an example of a homogeneous mixture? A. Zinc B. Copper C. Bronze D. Sand.

The speed of sound in air at 20° C is 343 m/s. Its speed in water at 20° C is 1,483 m/s. How much longer would it take for sound in air to travel 10 km than in water?

The process of passing electricity through water to chemically separate it into hydrogen and oxygen is called

How did the planets form? Question 12 options: Gravity pulled small bits of rock and dust together to form a larger mass The planets were instantly created during the big bang Large stars had gravity and brought matter together None of these answers

Describe three types of changes in velocity.

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.