Physical science exam 1) a scientist carries out an experiment. how could she other scientists judge the validity of her results? a. use confusing language in her report b. let other scientists closely review her work c. prevent others from seeing her data d. keep her experimental procedure a secret 2) which type of graph is best used to show the amount of product formed under different reaction conditions? a. box and whisker plot b. circle graph c. bar graph d. scatter plot 3) how are chemical and physical changes different on a molecular level? a. chemical changes involve the breaking of bonds in molecules. b. chemical changes do not affect bonding between atoms. c. physical changes do not involve molecules. d. physical changes cause new molecules to form.

When undergoing chemical reactions where does the reactant combine to the enzyme?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

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