![ahmedeldyame](/avatars/44758.jpg)
ahmedeldyame
03.07.2019 •
Chemistry
Cobalt (ii) chloride exits in hydrated forms, the dehydrate and hexahydrate forms. a chemist grabs cobalt (ii) chloride hexahydrate from the shelf and wants to dehydrate the salt. if 5.00g of hexahydrate were heated to drive off waters of hydration, how many grams of the anhydrous salt would remain?
Solved
Show answers
More tips
- S Society and Politics Secrets of NATO: Which Countries are Part of the Alliance?...
- H Health and Medicine Is Massage Necessary? Facts and Opinions...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Chemistry
- C Chemistry In an exothermic the change in enthalpy is usually Positive, because the potential energy of the reactants is higher than the potential energy of the products Neutral, because...
- M Mathematics What are the possible solutions to the equation x3 - 2x2 + 9x - 18 = 0...
- E English What does the word “emulate” most closely mean as it is used in Paragraph 3?...
- B Biology Use this resource to trace the evolutionary relationships in phylogenetic trees for a few animals. Click through the opening screens, and then use the tools along the bottom...
- B Business A more efficient means of processing algae to produce an anticancer drug is discovered. As a result, the supply curve for the drug will: a. shift to the right, increasing the...
- M Medicine Which drugs can be used with chemotherapy? Select ALL that apply. a. benzydamine b. gallium alfa c. epoetin nitrate d. amifostine e. acetaminophen f. progesterone hormone g....
Ответ:
2.48 grams.
ExplanationStart by finding the formula mass for cobalt (II) chloride and cobalt (II) chloride hexahydrate.
As a transition element in the middle d-block of the periodic table, cobalt can form ions with a plurality of charges. It is thus necessary to indicate its charge in systematic names of cobalt-containing formula.
The cation "cobalt" in the systematic name of the salt has the Roman numeral "(II)" attached to it in brackets. As a metal, cobalt forms positively-charged ion. The one here thu has charge of +2.
Chloride ions have charges -1. Charges cancel out to produce neutral compounds. Each cobalt cation in this salt would thus pair with two chloride anions. Hence the empirical formula:
.
The prefix "hexa-" in the name cobalt (II) chloride hexahydrate indicates that every formula unit of this salt contains six units of water. The hydrated salt thus has an empirical formula of
.
Given the relative atomic mass for each of the elements, as seen on a modern periodic table of the elements:
Cobalt- 58.93Thus the formula mass of each compound
Cobalt (II) chlorideCobalt (II) chloride hexahydrate
decomposes under heat to produce cobalt (II) hexahydrate and water. Hence the equation:
Therefore
Molar ratio:The mass ratio
indicates that 262.12 grams of cobalt (II) chloride hexahydrate decomposes to produce 129.83 grams of its corresponding anhydrous salt. Accordingly, heating 5.00 grams of the hexahydrate would produce 2.48 grams of its anhydrate.
Ответ:
the sun is made of gas.
Explanation: The Sun is a huge, glowing sphere of hot gas. Most of this gas is hydrogen and helium.
Spymore