How would you identify substances in a question

Have you ever thought about how an MP3 player works? What form of energy is used to power an MP3 player? What form of energy do you use from an MP3 player? Can you think of any other forms of energy that may be used inside of an MP3 player?

The specific latent heat of vaporisation for water is 2260 kJ/kg. Calculate the energy you need to transfer to boil water with a mass of 150 g.

Students in a chemistry class added 4g of magnesium (Mg) to 50g of hydrochloric acid (HCl). A chemical reaction occurred that produced magnesium chloride (MgCl2) and 6g of hydrogen gas (H2).

What is the relationship among hydrogen bonds and forces of cohesion adhesion and capillarity?

The smallest particle to retain the properties of an element is an?

Suppose you find a rock that contains some potassium-40 (half-life of 1.3 billion years). you measure the amount and determine that there are 5 grams of potassium-40 in the rock.

What are some positive and negative effects of the production of maple syrup on society and the environment?

Describe and give an example of parasitism.

Why is a dilute solution of oleic acid used instead of pure oleic acid?

The vapor pressure of benzene (C6H6) is 73.0 mm Hg at 25 °C. What is the vapor pressure of a solution consisting of 179 g of benzene and 0.217 mol of a nonvolatile nonelectrolyte?