Give three examples of physical change

A balloon with a volume of 5.0 L at a pressure of 94.2 kPa expands until its volume doubles. What is the new pressure of the gas in the balloon?

indicators are chemicals that change colour in presence of an acid or an alkali. Universal indicators and pH meters are used to measure pH. Desccribe how you would use a universal indicator to find the pH of sodium hydroxide.

Which of the following best describes an atom? A. protons and electrons grouped together in a random pattern. B. protons and electrons grouped together in an alternating pattern. C. a core of protons and neutrons surrounded by electrons. D.

Describe the interior structure of the earth

What will be the total number of molecules of nadh, fadh2, and gtp that are synthesized if the citric acid cycle repeats 9 times?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda