8 points Osvaldo has a fraternal (not identical) twin brother named Fernando.
Fernando is the same height as Osvaldo, both eat roughly the same foods
in similar amounts, and both get similar amounts of exercise. However,
Fernando weighs approximately 10 lbs more than Osvaldo. Construct an
explanation in the space below for how it is possible for two people with
such seemingly similar inputs and outputs to have different body masses?
Be sure to use terms from the word bank. *
work
macromolecule
system
surroundings
inputs
Word Bank
metabolism
heat
basal metabolic rate (BMR)
calories
energy
thermal energy
outputs
mass
Your answer

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What is the percent by mass of oxygen in fe2o3