C104 Final

3. 3.14 x 1023 molecules of CO2 are produced in a chemical reaction. How much would the sample weigh in grams?

10) Most substances shrink when they freeze from a liquid into a solid, but because of water's unique shape, when it freezes it actually ____________.

10. Your friend says that what makes one element distinct from another is the number of electrons about the atomic nucleus. Do you agree wholeheartedly, partially, or not at all? Explain.

1. What is the mass in kilograms (kg) of a person who weighs 143 lb?

Atomic mass of calcium is 40. The mass of 2.5 gram atoms of calcium is _______.

The first test performed was the density test. The measured was of the sample was 14.51 grams, and the volume was 20 cm3.

You are given a small piece of gold to analyze. Using the Archimedes Principle you find that the volume is 0.40 cm3 and the mass is 6.0 g. What conclusions can you reach from your simple density analysis?

Given m = 10 kg and gmoon = gm = -9.8/6 = -1.633 m/s², find the weight.

In Part 1, the reactants were solid and liquid respectively, and one was soluble and one wasn’t, while the product was a solid and wasn’t soluble. Similarly, in Part 2, the reactants were solid and liquid respectively, and one was soluble and one wasn’t, while the product was a solid and was soluble. Also, more specifically, in Parts 1 and 2, a precipitate (which is a kind of chemical reaction where a solid is formed from a solution) formed which proves that it’s a chemical reaction because it can’t change states of matter without the raising or lowering the temperature which we didn’t do, so we must have created a new substance that becomes a solid in room temperature. Also, the acidity changed from reactant to product. In both Parts 1 and 2, the reactants were acids and bases respectively, and the products were bases.

Science and Chemistry Assignment 2 (Chapters 4 and 5) 1. Carbon is considered a unique atom because it can bond to four other atoms or groups of atoms which makes a large variety of molecules possible. 2. The Carboxyl group acts as an acid and the amino group acts as a base. 3.

2. A cylindrical object 0.5m in diameter and 2m long weights has a mass of 200kg. The object is floating end-down in water. How many cm of the object are above the waterline?

Assuming you weigh out 176 mg of maleic anhydride, how many moles does that correspond to?  (Use five digits after the decimal point)

2. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.

I used these certain amount of mass so I have a big range of data and will make a better comparison.

2C4H10(g) + 13O2(g)  8CO2(g) + 10 H2O(l) (a) the oxidizing agent and is oxidized. (b) the oxidizing agent and is reduced. (c) the reducing agent and is oxidized. (d) the reducing agent and is reduced. (e) neither an oxidizing agent nor a reducing agent.