Which of the following is a heterogeneous mixture

A) A hot cup of coffee

B) Hot tea

C) A milk chocolate bar

D) A fruit salad

What is one thing needed for condensation to ocur

What percent is tungsten made of from soil?

How much heat is absorbed by a 750-g iron skillet when its temperature rises from 25oC to 125 oC? The specific heat of iron is 0.449 J/goC.

The activity of a certain isotope dropped from 3200 ci to 800 ci in 24.0 years. what is the half-life of this isotope (in years) ? show your work.

Use the periodic table to answer the questions below. Which diagram shows the correct electron configuration for nitrogen (N) ?

How does the number of molecules in one mole of carbon dioxide compare with the number of molecules in one mole of water? A. There are four times as many molecules in one mole of carbon dioxide as there are in one mole of water. B.

Suppose you had 1.0 mol samples the following gases at STP. If the volume of each of the samples of gas was reduced to one tenth of its original size and the temperature remained the same, which gas would have the lowest pressure?

What happens when the silvered coin is put on the flame

Do simple molecules conduct electricity? and why?

C) 2,2-dimethyl-3-heptyne how to draw