17. Chemistry is concerned about a. the properties and interactions of matter C. and energy the properties of the subtances composing the matter b. a. 1.34 b. 1.62 18. Ethyl alcohol has a chemical formula of C₂H5OH. How many moles are there in 125g of ethyl alcohol. C. 2.45 d. 2.71 19. Which statement is true? a. b. Atoms and elements are the same concept Some matter consists of atoms a. 1,1,1 b. 2,1,2 a. b. 21. Which element is a metalloid? d. 20. Determine the coefficients (x,y,z) that balance/s the equation. cobalt boron the earth's physical structure and substance Both a and b C. Oxygen atoms combine to form a compound d. Both a and c (x)O₂+(y) PCl3→(z) POCl3 1,2,2 Answer is not among the choices C. d. C. d. selenium Both b abd c

17. Chemistry is concerned about a. the properties and interactions of matter C. and energy the properties of the subtances composing the matter b. a. 1.34 b. 1.62 18. Ethyl alcohol has a chemical formula of C₂H5OH. How many moles are there in 125g of ethyl alcohol. C. 2.45 d. 2.71 19. Which statement is true? a. b. Atoms and elements are the same concept Some matter consists of atoms a. 1,1,1 b. 2,1,2 a. b. 21. Which element is a metalloid? d. 20. Determine the coefficients (x,y,z) that balance/s the equation. cobalt boron the earth's physical structure and substance Both a and b C. Oxygen atoms combine to form a compound d. Both a and c (x)O₂+(y) PCl3→(z) POCl3 1,2,2 Answer is not among the choices C. d. C. d. selenium Both b abd c

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A nutrition table lists apples with a potassium content of 4600 mg/pound. Assume an average apple is 75.0 g, the minimum daily intake for potassium for a healthy adult is 3500. mg per day. Calculate the number of apples per day to meet this requirement for a healthy adult. Assume 454 g = 1 pound. O 7.96 apples per day O 0.126 apples per day O 0.217 apples per day O 4.61 apples per day
Which of the following statements best describes the elements in Group 8A (18) of the periodic table? a. They are all liquids under normal conditions. b. They exist naturally as single atoms. c. They form ions of variable charge. d. They exist as diatomic molecules.
16. Your dad gifted you his old rock collection. If 50.4% of the rocks have a mass of 15 g, 13% are 12 g, and the rest are 16 g. What is the average rock mass?
1. Determine the number of atoms in 0.475 g of palladium (Pd). atoms 2. Determine the mass of 139 protons of palladium.
Drawing A Drawing B b. Imagine that the atom in Drawing B had been removed by physical separation from one of the substances in Model 1. What substances could have been the source of the atom in Drawing B? Classification of Matter
The following data were collected for several compounds of iron and oxygen: Mass of iron that combines with 1 g of oxygen Compound A 3.49 g Compound B 2.33 g Compound C 2.62 g Which calculations should be performed to illustrate the law of multiple proportions? Group of answer choices a. determine the ratio of the mass of iron combining for one compound by that for another compound b. determine the mass of iron combining with 1 g oxygen for each compound c. determine the ratio of iron and oxygen atoms for each compound d. convert the ratio into a whole number fraction
QUESTION 31 A substance composed of two or more elements in a fixed, definite proportion is O A. a homogeneous mixture B. a heterogeneous mixture O C. a compound O D. a solution QUESTION 32 Bonds are made by sharing or transferring by the atoms. O A. protons O B. electrons OC. neutrons O D. photons QUESTION 33 Potassium (K) is a/an O A. noble gas OB. transition metal O C. alkali metal O D. alkaline earth metal
a. A fictitious element X has an average atomic mass of 122.264 u.122.264 u. Element X has two naturally occuring isotopes. The most abundant isotope has an isotopic mass of 121.752 u121.752 u and a relative abundance of 63.97%.63.97%. Calculate the isotopic mass of the least abundant isotope. b.Suppose that fictional element X has an average atomic mass of 75.531 u.75.531 u. Element X has two isotopes. One isotope has a mass of 72.203 u72.203 u and a percent abundance of 17.26%.17.26%. Calculate the mass of the second isotope. c. A 1.7878 g1.7878 g sample of sodium containing a mixture of Na23Na23 and Na22Na22 has an apparent "atomic mass" of 22.9743 u22.9743 u. Find the mass of Na22Na22 contained in this sample.
The element argon has three isotopes and an average atomic mass of 39.948 u. Idenitfy the most abundant isotope of element argon. argon-38 cannot determine from the information given argon-36 argon-40 3:39 PM ch S.W 2020 79°F 9/8/2021 AV 10 DII delete f9 12 144 & L. backspace home 4. 8 pg up T. Y 心) %24 林
Which of the following is not one of the four postulates of the atomic theory? Group of answer choices A. Atoms are divisible. B. Atoms of the same element have the same properties. C. Chemical compounds are composed of atoms of different elements D. Chemical reactions are merely rearrangements of the atoms