A variable is the factor in a controlled investigation that does not change. True or False

24. Which Portuguese explorer sailed around Africa and across the Indian Ocean to reach India? A Bartolomeu Dias B. Pedro Cabral C. Vasco da Gama D. Prince Henry

Why are metals malleable, ductile, and good conductors

If a sample is analyzed and the line intensity registers a relative color intensity of 15, what is the approximate molarity of morphine in the sample? (note: the molecular formula of morphine is c17h19no3)

A student mixes 50 g of water with 300 g of water and 5g of lemon what is the mass of the solution 355 305 350 345

How does increase temperature change the percentage yield

Consider the two electron arrangements for neutral atoms A and B. Are atoms A and B the same element? A - 1s2, 2s2, 2p6, 3s1 B - 1s2, 2s2, 2p6, 5s1 yes or no

Match the following terms to their correct examples Conduction Convection Radiation Water warming on a stove The sun warming the earth A spoon resting in a cup of tea gets hot

Why are 3 ammonium groups needed for every 1 nitride ion?

How do you explain the relativity high conductivity of tap water compared to a low or zero conductivity for distilled water

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed