Which of the following substances would be the softest?

CuO

SiC

C25H52

Zn

If a total distance of 750 m is covered in a time interval of 25 s, the average speed is? 3, 974 mph 3 mph 30 mph 30 m/s

Something breaking is an example of what kind of change? A. physical only B. chemical only C. physical and chemical

How do you work out the number of neutrons in an atom?

Thorium is an element that occurs naturally in the earth's crust. The only naturally occurring isotope of thorium is 232Th and it is unstable and radioactive. The first step in the Thorium decay chain is the emission of an alpha particle.

Consider the following reaction: 2NO (g) + O2 (g) →2NO2 (g) Estimate ΔG∘ for this reaction at each of the following temperatures and predict whether or not the reaction will be spontaneous.

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