Questions from General Chemistry

Q: Iron ores, usually oxides of iron, are converted to the

Iron ores, usually oxides of iron, are converted to the pure metal by reaction in a blast furnace with carbon (coke). The carbon is first reacted with air to form carbon monoxide, which in turn reacts...

Q: Although magnesium metal does not react with water at room temperature,

Although magnesium metal does not react with water at room temperature, it does react vigorously with steam at higher temperatures, releasing elemental hydrogen gas from the water. Mg(s) + 2H2O(g)...

Q: Consider the isotopes of radium listed in Table 19.3.

Consider the isotopes of radium listed in Table 19.3. Which isotope is most stable against decay? Which isotope is “hottest”? From table 19.3:

Q: The following isotopes (listed with their half-lives) have

The following isotopes (listed with their half-lives) have been used in the medical and biologic sciences. Arrange these isotopes in order of their relative decay activities: 3H (12.2 years), 24Na (15...

Q: In each of the following reactions, identify which element is being

In each of the following reactions, identify which element is being oxidized and which is being reduced by assigning oxidation states. a. 2Cu(s) + S(s) / Cu2S b. 2Cu2O(s) + O2(g) / 4CuO(s) c. 4B(s) +...

Q: Although naturally occurring potassium consists mostly of the isotope of mass number

Although naturally occurring potassium consists mostly of the isotope of mass number 39 (93.25%), isotopes of mass number 41 (6.73%) and 40 (0.01%) also are present. Write the nuclear symbol for each...

Q: Technetium-99 has been used as a radiographic agent in bone

Technetium-99 has been used as a radiographic agent in bone scans ( 43 99

Q: Naturally occurring magnesium consists primarily of three isotopes, of mass numbers

Naturally occurring magnesium consists primarily of three isotopes, of mass numbers 24, 25, and 26. How many protons does each of these nuclides contain? How many neutrons does each of these nuclides...

Q: How is 6 14

How is 6 14

Q: Complete each of the following nuclear equations by supplying the missing particle

Complete each of the following nuclear equations by supplying the missing particle. a. 80 201