Chemistry, 29.11.2021 20:10, shadowselena63
1) In the year 1618, England was experiencing a drought. Despite the shortage of water, cattle refused to drink
from a certain pond in Epson Common. A man named Henry Wicker took some interest in this, and went over
and drank a bit of the water himself. It tasted terribly bitter. He took some home and after boiling off the water
he was left with Magnesium Sulfate crystals. This salt became known as "Epsom Salts" and soon after they were
being used to treat constipation all over Europe. The three naturally occursing isotopes of magnesiums are:
magnesium-24(23.985 amu), magnesium-25(24.986 amu) and magnesium-26(26.983 amu). Their percent
abundances in nature are 78.99%, 10.00% and 11.01% respectively. What is the average atomic mass of
magnesium?
na torta
2) There are four naturally occurring isotopes of iron: iron-56 (91.754% at 55.935amu), iron-54 (5.845% at
53.940 amu), iron-57 (2.119% at 56.935 amu) and iron-58 (0.2830% at 57.933 amu). What is the average
atomic mass of iron?
Answers: 3
Chemistry, 22.06.2019 02:00, hemolelekeakua
The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?
Answers: 3
Chemistry, 22.06.2019 13:50, hannahmyung1113
Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.
Answers: 3
Chemistry, 22.06.2019 14:00, daniel1480
Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .
Answers: 1
1) In the year 1618, England was experiencing a drought. Despite the shortage of water, cattle refus...
Biology, 08.10.2019 00:00
English, 08.10.2019 00:00
Biology, 08.10.2019 00:00
Physics, 08.10.2019 00:00
Mathematics, 08.10.2019 00:00