Which of the following contains the smallest amount of matter?

A. 25 g

B. 2.5 hg

C. 2,500 dg

D. 0.25 kg

How many isotopes does carbon have?

In preparing students to write a chemical equation we often use analogies. Let's write an equation for the construction of a car with just 2 door. We'll use doors, body, interior, tires how to write it?

Why is H2SO4 regarded as an ampholyte

Atom with mass number of 31 and 16 neutrons what is the atomic number

A period three element has 738, 1451, and 7733 kj/mol as its first three ionization energies. what is the symbol of this element?

What is true about empathy? Most anyone can learn this skill. Not everyone can learn this skill. It is a desirable attribute. choices A and C

What effect can new observations have on a scientific theory

The total number of valence electrons in the phosphate ion is

The reaction below has an equilibrium constant kp=2.2*106 at 298 k. 2cof2 (g) ⇌co2 (g) + cf4 (g) calculate kp for the reaction below. cof2 (g) ⇌12co2 (g) + 12cf4 (g)

The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing intensity (brightest to dimmest) of the light bulb.