Write chemically balanced equation for the following reactions

(a) Zinc reacts with hydrochloric caids

(b) Magnesium reacts nitric acid

(c) Calcium oxide reacts sulfuric acid

(d) Barium carbonate and nitric acid

According to Avogadro's Law, how many molecules of any gas at STP are present in a volume of 22.41 L? a. 22.41 molecules c. 4.62*1015 molecules b. 3.08*107 molecules d. 6.02*1023 molecules

A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scientist is able to duplicate the results. The statement by Dr. Sigma is ___.

3H2 (g) + N2 (g) 2NH3 (g) This reaction has a equilibrium constant of 4.51x10-5 at 450 °C and initially contains 5.4 atm NH3, 2.7 atm N2, and 1.4 atm H2.

The ionization of amino acids depends on the ph and the pkas of the ionizable groups. the pk1 and pk2 for the amino acid shown below are 2.1 and 8.8, respectively. at what ph is the amino acid ionized predominantly as shown?

What is the bond between Ca and Cl

Convert 0.023 kg to centigran

How many unpaired electrons arethere in Cu1 + ion

A 750 mL sample of nitrogen is heated from 30°C to 92 C at constant pressure. What is the final volume?

Write a brief explanation about why a plant extract is a mixture

What is an element that has more valence electrons than fluorine and less energy levels than sodium?