Which element is always found in impure form naturally

A. copper

B. nitrogen

C. aluminium

What type of matter is gravel

Cunoscându-se că la 25C presiunea oxigenului dintr-un recipient este de 4 atmosfere, să se afle la ce temperatură oxigenul din recipient va avea presiunea de 8 atmosfere

3Mg + N2--> Mg3N2 True or False: Another possible product for this reaction could be MgN2

Vad är en fällningsreaktion?

Suppose you are given the following list of ingredients: 1 dozen eggs 24 teaspoons of vanilla 1 lb. (82 tsp) of salt 1 lb (84 tsp) of baking soda 3 cups of chocolate chips 5 lb (11 cups) of sugar 2 lb (4 cups) of brown sugar 1 lb (4 sticks) of

Model describe how you would show j. j. thomson's model of the atom using small beads and clay

Switching one substance for another is called ... ? a) displacement b) synthesis c) decomposition d) oxidation

C2h4 + O2 - CO2 + H2O If we start with 20 grams of CH4, how many moles of CO2 will form?

How does chemical energy relate to the atom and how can we use it?

A positively charged atom is known as a cation. A cation will? ... A) have more protons B) have to same number of protons and electrons. C) Be the same as a neutral atom. D) have more electrons.