What is the charge of an atom's nucleus if the atom has 25 protons, 30 neutrons, and 25 electrons

Soil erosion is a secondary environmental problem because it only degrades the land and does not affect water or air quality. True or false?

Which pair of atoms has the highest electronegativity difference? A. H - S B. H - Cl C. N - H D. O - H E. C - H

Which statement is true about the force of gravity? A. The earth has a greater gravitational effect than the sun. B. The moon has a greater gravitational effect that the sun. C. The moon has a greater gravitational effect than the earth. D.

What are compounds? 1) Pure substance 2) homogeneous mixtures 3) heterogeneous mixtures

Calculate freeze 62.9 g of iron at 1535oC Hf (J/g) = 257

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.

Solve for x: ln x = 0.863. Report your answer to 3 significant figures.

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch