PLZ HELP MEEE! I will give BRAINLIEST Chemistry Unit 2 Part 2
You are helping a chemist in their lab, they give you a sample of an unknown substance. They tell you the substance has two isotopes. Unknown Isotope #1 – 63 amu and 70% abundance. Unknown isotope #2 – 65 amu and 30% abundance.

1. What is a scientific question about the substance you could ask given the information you have? 4 points.

2. Knowing that the average atomic mass could identify the unknown substance. Describe/state a model (mathematical) you could use to identify the substance. 5 points

3. You are given three samples of known substances that each looks like your unknown substance. Describe an experiment you could do to verify if your substance is the same as one of your known samples. What would your independent and dependent variables be in your experiment? 6 points

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

Is a pencil falling to the floor anon contact force, a force, or a contact force