Concept explainers
(a)
The percentage by mass of each element in salt,
NaCl
.
(a)
Answer to Problem 7E
Explanation of Solution
The percentage by mass of an element in a compound is defined as the percentage of total mass of that element present in the total mass or formula mass of the compound. Mass percent of any element B in compound AB is given as,
The formula mass of
Substitute
The percentage by mass of sodium
Substitute
The percentage by mass of chlorine
Substitute
Conclusion:
Therefore, the percentage by mass of sodium
(b)
The percentage by mass of each element in sucrose,
C 12 H 22 O 11
.
(b)
Answer to Problem 7E
Explanation of Solution
The percentage by mass of an element in a compound is defined as the percentage of total mass of that element present in the total mass or formula mass of the compound. Mass percent of any element B in compound AB is given as,
Atomic mass of carbon
Atomic mass of hydrogen
Atomic mass of oxygen
The chemical formula of sucrose is
The formula mass of sucrose,
Substitute
The total mass of carbon
Substitute
The total mass of hydrogen
Substitute
The total mass of oxygen
Substitute
The percentage by mass of carbon
Substitute
The percentage by mass of hydrogen
Substitute
The percentage by mass of oxygen
Substitute
Conclusion:
Therefore, the percentage by mass of carbon
Want to see more full solutions like this?
Chapter 12 Solutions
An Introduction to Physical Science
- Hello, I am having an issue with figuring the following: For pH 9.5 I am getting 3.16 x 10 ^-10. Is this correct? Thank you Solution X has a pH of 9.5, and solution Y has a pH of 7.6.? What is [H3O+] in Solution X? What is [H3O+] in Solution Y?arrow_forwardBased on the following equation what is the heat of formation, AHf", for H2O(1) * 2 H,(g) + O,(g) → 2 H,0(1) + 136.6 kcal -68.3 kcal +68.3 kcal -136.6 kcal +136.6 kcal The thermochemical reaction for the decomposition of nitrogen dioxide is shown below. What is the heat of formation, AHF°, of nitrogen dioxide, NO2(g) * 2 NO,(g) -IN,(g) + 2 O,(g) + 16.2 kcal -16.2 kcal O +16.2 kcal O +8.1 kcal O -8.1 kcalarrow_forwardHydrogen sulfide is an impurity in natural gas that must beremoved. One common removal method is called the Clausprocess, which relies on the reaction:8 H2S1g2 + 4 O21g2¡S81l2 + 8 H2O1g2Under optimal conditions the Claus process gives 98% yield of S8from H2S. If you started with 30.0 g of H2S and 50.0 g of O2, howmany grams of S8 would be produced, assuming 98% yield?arrow_forward
- how many grams are in 2.70 x 10^24 molecules of P^4arrow_forwardPlants grow in many different shapes and sizes. Much of their shape depends on an internal structure that is composed of carbon-containing molecules such as cellulose and lignin. Plants that have a strong internal structure can grow larger than other plants because their structure can support their size. Plants obtain the majority of the carbon necessary for building these structural molecules from - O air O microorganisms O soil O water 10 11 12 13 14 15 16 17 18 19 20 近arrow_forwardThe aquation of tris(1,10-phenanthroline)iron(II) in acid solution takes place according to the following chemical equation: Fe(phen)32++ 3 H3O++ 3 H20 → Fe(H2O)62+ + 3 phenH+ If the activation energy, Ea, is 126 kJ/mol and the rate constant at 30°C is 9.8 x 10-3 min-1, what is the rate constant at 45°C? O 1.1 x 103 min-1 O 1.1 x 10-1 min-1 9.3 x 10-4 min-1 9.6 x 100 min-1arrow_forward
- Yazid wants to make compost from leaves, sawdust, and food scraps. Leaves have 2% N, C:N 22.5, and MC 77%. Sawdust has 30% C, C:N 300, and MC 20%, whereas food scraps have 2% N, C:N 20, and 50% MC. If the amount of leaves used is 15 kg, determine how much food scraps and sawdust should be added to get a compost mixture with an ideal ratio of C:N 30:1 and moisture content 60%?arrow_forward: P Note: You may assume you have an excess of either reactant if the reaction requires more than one of those molecules to form the products. In the drawing area below, draw the skeletal ("line") structures of the missing organic products X and Y. You may draw the structures in any arrangement that you like, so long as they aren't touching. H+ H+ + -OH ☑ Y Predict the organic products that form in the reaction below: Click and drag to start drawing a structure.arrow_forwardYour friend refuses to use the coffee creamers at the local diner because they have been sitting on the table all day. Explain to your friend why these creamers are perfectly safe to use.arrow_forward
- An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage LearningModern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning