Homework Answers
The major four elements that comprise 96% of the living matter include carbon, hydrogen, oxygen and nitrogen. Then comes phosphorus and sulfur. These six elements are the major constituents of all living matter. Other elements like calcium, potassium, silicon etc. are also present are referred as micro-constituents.
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Four elements comprise ninety-six percent of all living matter. These elements are carbon, hydrogen, ___ and...
There are four elements that are all in amino acids. Two of these are carbon and...
There are four elements that are all in amino acids. Two of these are carbon and hydrogen. The other two are? 1) sulfur and nitrogen 2) phosphorus and nitrogen 3) oxygen and nitrogen 4) oxygen and phosphorus 5) sulfur and oxygen
The percentage of naturally occurring elements making up the human body (Carbon, hydrogen, oxygen, and nitrogen...
The percentage of naturally occurring elements making up the human body (Carbon, hydrogen, oxygen, and nitrogen make up 96% of living matter. Most of the remaining 4% consists of calcium, phosphorus, potassium, and sulfurntages of these elements found in other organisms) are similar to the percentages of these elements found in other organisms. How could you account for this similarity among organisms
Question 12 • Which of the followings are the most abundant elements in organisms? carbon, oxygen,...
Question 12 • Which of the followings are the most abundant elements in organisms? carbon, oxygen, nitrogen, calcium carbon, hydrogen, nitrogen, oxygen carbon, sodium, hydrogen, nitrogen carbon, oxygen, phosphorus, hydrogen oxygen, hydrogen, calcium, nitrogen Question 13 Why is each element unique and different from other elements in chemical prope
Write a balanced chemical equation for each of the following reactions: 1. Hydrogen + chlorine hydrogen...
Write a balanced chemical equation for each of the following reactions: 1. Hydrogen + chlorine hydrogen chloride 2. Hydrogen + nitrogen — ammonia 3. Carbon + steam → carbon monoxide + hydrogen 4. Calcium oxide + water calcium hydroxide 5. Phosphorus + oxygen → diphosphorus pentoxide 6. Aluminum sulfate + calcium hydroxide → aluminum hydroxide + calcium sulfate 7. Aluminum + oxygen aluminum oxide 8. Sodium peroxide + water sodium hydroxide + oxygen 9. Copper + concentrated sulfuric acid →...
Hydrogen 1H 2- Atomic number He Helium - He Mass number First shell Element symbol- Electron-...
Hydrogen 1H 2- Atomic number He Helium - He Mass number First shell Element symbol- Electron- distribution diagram Lithium Beryllium Carbon Boron 3B Oxygen Nitrogen en N Fluorine انار Neon Be 10 Ne Second shell Sodium 11 Na Aluminum AI Sulfur Magnesium 12Mg Chlorine Phosphorus Silicon 1 Si Argon Ar Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon Selected Answer: C. Phosphorus Answers:...
O MATTER Using the Periodic Table to identify similar elements Andre Decide which element probably forms...
O MATTER Using the Periodic Table to identify similar elements Andre Decide which element probably forms a compound with hydrogen that has a chemical formula most and least similar to the chemical formula of the compound formed by hydrogen and nitrogen. Comparing chemical formula of compound formed with hydrogen: oxygen 0 most similar to nitrogen least similar to nitrogen magnesium 0 0 sulfur 0 0 phosphorus 0 0 1 x 5 ?
Hydrogen - Atomic number Helium - He He 4.00 First Mass number Element symbol shell Electron-...
Hydrogen - Atomic number Helium - He He 4.00 First Mass number Element symbol shell Electron- distribution diagram Lithium Beryllium Be Boron Carbon Fluorine 6C Nitrogen N Neon 10 Ne Second shell Silicon Sodium 11 Na Aluminum Phosphorus Magnesium 12 Mg Chlorine 17C1 Argon 18Ar 14Si 1SP Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon? A. Nitrogen OB. Silicon C. Phosphorus D. Boron
8. Why does carbon contain only 4 valence electrons when it has 6 total electrons? 9.True...
8. Why does carbon contain only 4 valence electrons when it has
6 total electrons?
9.True or False. Oxygen and sulfur have the same number of
valence electrons.
10. True or False. Beryllium and magnesium have the same number
of valence electrons.
11. True or False. Sodium and magnesium have the same number of
valence electrons.
12. What is the relationship between the number of valence
electrons and the column on the periodic table?
13. How is the number of...
You have an unknown substance that contains three elements: carbon, hydrogen, nitrogen. Your burn 7.114 grams...
You have an unknown substance that contains three elements: carbon, hydrogen, nitrogen. Your burn 7.114 grams of the unknown formula in excess oxygen gas to get 10.03 g of CO2 and 10.26 g of H20. What is the empirical formula of the unknown? what is the molecular formula if the molar mass of the unknown is 248.04 g/mol?
Caffeine has the following percent composition: carbon 49.48%, hydrogen 5.19%, oxygen 16.48% and nitrogen 28.85%. Its...
Caffeine has the following percent composition: carbon 49.48%, hydrogen 5.19%, oxygen 16.48% and nitrogen 28.85%. Its molecular weight is 194.19 g/mol. Find both the empirical formula and the molecular formula. Fill in the blanks for the subscripts in the formulas below. Fill in for all of the subscripts if the subscript is 1. empirical formula = C H N O molecular formula = C H N O
Question 12 • Which of the followings are the most abundant elements in organisms? carbon, oxygen, nitrogen, calcium carbon, hydrogen, nitrogen, oxygen carbon, sodium, hydrogen, nitrogen carbon, oxygen, phosphorus, hydrogen oxygen, hydrogen, calcium, nitrogen Question 13 Why is each element unique and different from other elements in chemical prope
Write a balanced chemical equation for each of the following reactions: 1. Hydrogen + chlorine hydrogen chloride 2. Hydrogen + nitrogen — ammonia 3. Carbon + steam → carbon monoxide + hydrogen 4. Calcium oxide + water calcium hydroxide 5. Phosphorus + oxygen → diphosphorus pentoxide 6. Aluminum sulfate + calcium hydroxide → aluminum hydroxide + calcium sulfate 7. Aluminum + oxygen aluminum oxide 8. Sodium peroxide + water sodium hydroxide + oxygen 9. Copper + concentrated sulfuric acid →...
Hydrogen 1H 2- Atomic number He Helium - He Mass number First shell Element symbol- Electron- distribution diagram Lithium Beryllium Carbon Boron 3B Oxygen Nitrogen en N Fluorine انار Neon Be 10 Ne Second shell Sodium 11 Na Aluminum AI Sulfur Magnesium 12Mg Chlorine Phosphorus Silicon 1 Si Argon Ar Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon Selected Answer: C. Phosphorus Answers:...
O MATTER Using the Periodic Table to identify similar elements Andre Decide which element probably forms a compound with hydrogen that has a chemical formula most and least similar to the chemical formula of the compound formed by hydrogen and nitrogen. Comparing chemical formula of compound formed with hydrogen: oxygen 0 most similar to nitrogen least similar to nitrogen magnesium 0 0 sulfur 0 0 phosphorus 0 0 1 x 5 ?
Hydrogen - Atomic number Helium - He He 4.00 First Mass number Element symbol shell Electron- distribution diagram Lithium Beryllium Be Boron Carbon Fluorine 6C Nitrogen N Neon 10 Ne Second shell Silicon Sodium 11 Na Aluminum Phosphorus Magnesium 12 Mg Chlorine 17C1 Argon 18Ar 14Si 1SP Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon? A. Nitrogen OB. Silicon C. Phosphorus D. Boron
8. Why does carbon contain only 4 valence electrons when it has
6 total electrons?
9.True or False. Oxygen and sulfur have the same number of
valence electrons.
10. True or False. Beryllium and magnesium have the same number
of valence electrons.
11. True or False. Sodium and magnesium have the same number of
valence electrons.
12. What is the relationship between the number of valence
electrons and the column on the periodic table?
13. How is the number of...
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