Which of the following elements is an alkali metal?

potassium (K)

calcium (Ca)

chromium (Cr)

germanium (Ge)

What is the ph of a 0.35 m solution of anilinium nitrate (c6h5nh3no3) ? kb for aniline is 4.2 * 10-10. your answer must be within ± 0.4%?

A sample of argon gas, Ar (g). is placed in a 3.80 L container at 320 K. The gas pressure is 0.496 atm. How many moles of Ar gas are in the container?

Determine the specific heat of a 213.0 g piece of metal in J/g•°C if the temperature of the metal drops from 70.2 °C to 25.6 °C when placed in a calorimeter with 250.0 mL of water at an initial temperature of 22.5 °C (specific heat of water is 4.

Chemical properties of matter depend mostly on A. the shape and size of the substance. B. the color of the substance. C. the types of atoms and bonds that a substance contains. D. the substance's state of matter.

If all of the bonding electrons in a molecule are bonded in two hybrid sp orbitals, which shape does the molecule most likely have? linear tetrahedral trigonal planar trigonal pyramidal

You would know you were in the troposphere If? It were raining on you You were floating in space You were flying in a high altitude jet You were in the ozone later

A burning match is an example of a chemical change phase change nuclear change physical change

The table below shows the shapes of two samples, C and D, when placed in three containers of different shapes.

How many grams of KCl are produced when 60 grams of K are reacted?

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