Thomson showed that the nucleus of an atom is small, dense, and positively charged. True or False

Phthalic acid is a diprotic acid having the formula HO2CC6H4CO2H that can be converted to a salt by reaction with base.

Fossil fuels are hydrocarbons comprised of primarily hydrogen and nitrogen, and some sulfur, carbon, oxygen, and mineral matter. a. True b. False

Which of the following properties of soil is most dependent on soil moisture? a. horizonation b. consistency c. cation-exchange capacity d. soil reaction

What is the temperature in Kelvin of freezing water? -0 -32 -100 -273

Question 13 The vapor pressure of ethanol at 25°C is 7.828 kPa. Calculate the vapor pressure in atm. Be sure your answer has the right number of significant digits.

Which of the following happens during a solar eclipse? The moon appears red. The moon casts a shadow on Earth. Earth, the moon, and the sun form a triangle. Earth comes between the sun and the moon.

The four elements comprising over 90 of living matter are

Consider the gas-phase reaction, n2 (g) + 3 h2 (g) 2 nh3 (g), for which kp = 43 at 400 k. if the mixture is analyzed and found to contain 2.0 bar of n2, 2.0 bar of h2 and 27.0 bar of nh3, describe the situation:

How many moles of ions are in 285 ml of 0.0150 m mgcl2?

Given: logK=nE∘0.0592 What is the value K for this redox reaction? Zn2 + (aq) + 2 Cl - (aq) → Zn (s) + Cl2 ( g. Ecell = - 2.12 V