Under what circumstances will a scientific theory be changed or discarded

A scientist measures the rate of a reaction between two liquids. Then he performs the reaction again, adding solid manganese. The reaction takes place more quickly the second time. The mass of the manganese decreased by 0.

Which nuclear emission has the greatest mass and the least penetrating power? (1) an alpha particle (3) a neutron (2) a beta particle (4) a positron

Varies in a family on the periodic table. Reactivity Specificity

Compare the reactivity of alcohols with the length of the R-group.

How does volvox differ from other protists

Which combination of protons neutrons and electrons is correct for the isotope of copper - 63?

What is the purpose of a domain?

What is the ideal gas constant? A. It is a constant that applies only at STP. B. It is a specific constant for a particular gas. C. It is a universal constant used for all gases. D. It is a constant that depends on the conditions.

The greenhouse effect is a result of the Sun's energy being absorbed by objects on the Earth and converted into which type of radiation? A) Radio B) Visible C) Infrared D) Ultraviolet

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.