7. Apply Selentific Reasoning Hooke and Van Leeuwenhoek made their discoveries around the same time, More than 150 years later, Schleiden,
Schwann, and Virchow all made breakthroughs within a few years of each other.
What are some possible reasons for the sudden development of the cell theory
after such a long break?
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To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon