A mother pulls her two children on a sled through the snow along a flat street. How much work is done if she pulls her children 100 feet with a constant force of 40 pounds at an angle of 28°?

Using Bowen's Reaction Series, if basalt, granite, and diorite were heated at the same time and rate, which would be the last to completely melt? Which would be the first? How do you know?

How many moles are in 5g of NaOH

Describe how to find the atomic number for the element oxygen

Magnesium has 12 protons. how many electrons are in its second energy level?

Half-life problems: (a) Hg-197 has a half-life of 64 hours. If you have 164g of Hg-197 today, how much will you have in 448 hours? (b) 263 minutes ago we had 5.12g of I-134 and now we only have 0.16g.

Why do deep earthquake do less damage then shallow ones?

A ball appears red in the sunlight. Mark the correct statements: The ball absorbs all colors except red. The ball reflects all colors and absorbs red. The ball absorbs red and then reflects black.

A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an elevation where the pressure is 0.74 atm, then the new volume is 1.8 L.

As electricity flows through a copper wire, the temperature of the wire increases. Some parts of the wire get warmer than others, but over time the wire is the same temperature from end to end.

The molar mass of Cu is 63.55 g/mol. The number of grams of Cu produced in this reaction is.