In the chemical laboratory why do scientists use a mortar and pestle

How is each item classified on the pH scale? Column A 1. baking soda: pH 9.0 2. lemon juice: pH 2.3 3. ammonia: pH 11.5 4. tomatoes: pH 4.2 5. bananas: pH 5.0 6. pure water: pH 7.0/Column B A. acid B. base C. neutral

Calculate the concentrations of all species in a 1.15 M Na 2 SO 3 (sodium sulfite) solution. The ionization constants for sulfurous acid are K a 1 = 1.4 * 10 - 2 and K a 2 = 6.3 * 10 - 8.

What kind of inhibitors are transition state analogs usually classified as? uncompetitive inhibitors competitive inhibitors noncompetitive inhibitors

Aspirin is the common name for acetyl salicylic acid, CgH804. One tablet contains 0.325 g of aspirin. How many moles of aspirin is this?

He process by which plants and animals incorporate the NO3 - and ammonia formed through nitrogen fixationand nitrification

Compound a has a molecular formula c5h12, and monobromination of compound a produces only compound b. when compound b is treated with a strong base, a mixture is obtained containing compound c and compound d.

Ip a gas has a temperature of 310 k and a pressure of 100 kpa. part a find the volume occupied by 1.20 mol of this gas, assuming it is ideal.

When Dmitri Mendeleev published his periodic table of the elements in 1869, there were 59 known elements. Today there are 118 known elements.

What are some types of thermometers?

The following values are the only allowable energy levels of a hypothetical one-electron atom: E₆ = - 2 x 10⁻¹⁹ J E₅ = - 7 x 10⁻¹⁹ J E₄ = - 11 x 10⁻¹⁹ J E₃ = - 15 x 10⁻¹⁹ J E₂ = - 15 x 10⁻¹⁹ J E₁ = - 15 x 10⁻¹⁹ J (a) If the electron were in the n =