When did the first particles of matter originate

Which of the following processes requires more heat energy? a. raising the temperature of 100. g of water by 10.0 °C b. raising the temperature of 50. g of water by 10.0 °C?

How many protons neutrons and electrons does argon have?

If the answer is correct you will be gifted the Brainliest Answer! Describe why solar radiation is said to drive winds. A) Token energy from solar radiation flares causes occasional directional shift in the winds, rains, and other weather phenomena.

Consider the reaction below. 2NH3g+N2g+3H2g What is the most likely effect to the forward reaction if there is an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases.

Which is a characteristic of weak acids and weak bases? A. Ka and Kb values of weak acids and weak bases are small. B. Forward reactions of weak acids and weak bases are favored. C. Dissociation of weak acids and weak bases is nearly complete. D.

Sodium (NA) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence electrons does potassium have? A) 0 B) 1 C) 9 D) 11

Which of the following is not caused by the moon? a. moonrise b. tides c. eclipses d. sunrise

Approximately how many mineral species have scientists identified? 250 5000 1500 60

A compound is 53.31 % C, 11.18 % H, and 35.51 % O by mass. What is its empirical formula? Insert subscripts as needed.

What is the element Ar classified as in the periodic table?