How many electrons does each element has in its outermost electron-shell?

How many electrons does each of the following elements have in its outermost electron-shell? (a) Magnesium (b) Molybdenum (c) Selenium Solve The elements of the periodic table are organized into groups that are based on the number of outer-shell electrons

Read More How many electrons does each element has in its outermost electron-shell?

ORGANIC CHEMISTRY (MCMURRY 7TH) Ch1 P 1.1

Give the ground-state electron configuration or each of the following elements: (a) Oxygen (b) Silicon (c) Sulfur Solve (a) To find the ground-state electron configuration of an element, first locate its atomic number. For oxygen, the atomic number is 8; oxygen thus

Read More ORGANIC CHEMISTRY (MCMURRY 7TH) Ch1 P 1.1

Why aqueous aminoethane is a basic solution?

The first thing you should understand is that , Nitrogen in NH3 contains a lone pair of electron. So it acts as a Lewis base. when NH3 is diluted in water is attracts an H+ from water to form Nh4+

Read More Why aqueous aminoethane is a basic solution?

What causes the differences in the Melting and Boiling Points of these molecules? Water (H2O), Ammonia (NH3), Hydrogen Fluoride (HF), Methane (CH4) and Neon (Ne)

Boiling point (and also melting point) is a function of inter-molecular forces of attraction within molecules.   Among the given molecules, H2O and HF can form reasonably strong intermolecular hydrogen bonds. These two molecules are expected to have higher boiling

Read More What causes the differences in the Melting and Boiling Points of these molecules? Water (H2O), Ammonia (NH3), Hydrogen Fluoride (HF), Methane (CH4) and Neon (Ne)

What happens when ethanol mixed to water?

In case of alcohols, just as it happens in case of many other biological molecules, the basic solubility rule that like dissolves like is a bit more complexed. Each alcohol consists of a carbon chain (always nonpolar) and a OH

Read More What happens when ethanol mixed to water?

What happens when hexane mixed to water?

If we add hexane to water, the hexane will float on the top of the water with no apparent mixing.   The reasons why hexane and water do not mix are complex, but the following gives you a glimpse at

Read More What happens when hexane mixed to water?

Chapter 1, Problem 1.26 General Chemistry, Raymond Chang Solve

Express the answers to these in scientific notation: (a) 0.0095 + (8.5 x 10_3) (b) 653 / (5.75 x 10_8) (c) 850,000 – (9.0 x 105) (d) (3.6 x 10_4) x (3.6 x 106) DOWNLOAD SOLVE

Chapter 1, Problem 1.25 General Chemistry, Raymond Chang Solve

Express the answers to these in scientific notation: (a) 145.75 – (2.3 x 10_1) (b) 79,500 / (2.5 x 102) (c) (7.0 x10_3) – (8.0x 10_4) (d) (1.0 x 104) x (9.9 x 106) DOWNLOAD SOLVE