How much energy in joules does it take to raise the temperature of 255g of water by 12.5C

The absorbance of a garbanzo bean solution that had been diluted by a factor of three was 0.528. what was the concentration of the iron in the original solution (before dilution) ?

The muscle that connects to the back of the pelvic girdle and femur

Which of the following is not a step in balancing redox reactions in acidic solution, using the half-reaction method? A) H2O and OH - are added as needed to the half-reaction equations to make the number of oxygen and hydrogen atoms balance.

A mixture of C3H8 and C2H2 has a mass of 2.8 g. It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.

QUIZ Instructions D Question 2 An increase in temperature will increase the rate of a reaction True False

Which atom has a change in oxidation number of - 3 in the following redox reaction K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2

Why does fluorine have a higher electronegativity than lithium?

What mineral is this? Irregularly shaped, white with nonmetallic luster, the hardness of 2.5, shows cubic cleavage and dissolves easily in water.

The passage of the USA Patriot Act of 2001 and the creation of the Department of Homeland Security reflect the determination of the United States government to (1) search for weapons of mass destruction in South Asia (2) increase the globalization

Is it possible for 2 different elements to have the same atomic number