What is the isotope with 50 protons, 68 neutrons, and 50 electrons?

The pressure of a sample of gas is 500. mm Hg and the volume is 30.0 L. If the volume is changed to 50.0 L, what is the new pressure?

Which of the following places did Alexander the Great NOT lead his army? A. India B. Spain C. Egypt D. Asia Minor

Classify each of the substances as a mixture, a compound, or an element ammonia neon copper - g

What is the total number of valence electrons in an atom of boron in the ground state

Give one example of a question that science would not be able to test. Then, explain how it could be changed into a testable question

How are insect wings not likely to be fossilized?

True or False: A Solar eclipse occurs when Earth casts a shadow on the Moon.

Compared to a phosphorus atom, a P3 - ion has (1) more electrons and a larger radius (2) more electrons and a smaller radius (3) fewer electrons and a larger radius (4) fewer electrons and a smaller radius

1. Crystals of ammonium chloride, NH4Cl, seem to disappear when mixed with water. The resulting clear liquid containing ammonium chloride and water is a A) compound. B) new substance. C) homogeneous mixture. D) heterogeneous mixture. 2.

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction