16 The best example of an element is –F oilG iceH waterJ oxygen17 Which of the following chemical symbols best represents an element?A HeB LiFс ноD NaCI18 Which of these data tables correctly classifies the given substances?FSubstance ClassificationHSubstance ClassificationNaCIcompoundNacIelementSielementSielementH,OcompoundH,OcompoundGSubstanceClassificationSubstance ClassificationNaCIelementNaCIcompoundSielementSicompoundH,Oelementcompound

Element : The element is made up of only one type of atoms . The element Can't be broken into any…

Answered: 16 The best example of an element is –…

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...

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Since 1965, dimes are composed of copper with 25% nickel on the outside. A Roosevelt Type dime (1946 to 1964), designed by John R Sinnockis, is composed of 90.0% silver and 10.0% copper. The composition changed when the dime cost more in silver than it was worth. A 1963 dime is weighed on ten different balances, and the mass is recorded. Balance Number 1 2 3 4 5 6 7 8 9 10 Mass (g) = Xm 2.495 g 2.509 g 2.507 g 2.511 g 2.508 g 2.538 g 2.512 g 2.501 g 2.510 g 2.490 g a) Solve for the average value, x: d=Xm-X b) Fill in the chart for all the d and d² values. d²
A student poured two liquids (ethylene glycol and mercury) into a tall graduated cylinder to perform an experiment. Which of the following observations is false? Iron Density of various substances Substance Ethylene glycol Chloroform Mercury Gold Density (g/cm³) 7.8 1.09 1.49 13.5 19.32 O Chloroform floats on top of ethylene glycol. O Iron floats on top of mercury. O Iron sinks in chloroform. O Gold sinks in mercury. O Ethylene glycol is on the topmost layer.
57.0 µL drops of two different liquids are put on the same surface: Liquid X Liquid Y Note for advanced students: you may assume neither liquid interacts strongly with the surface. What's different about liquids X and Y? Your answer should be the one- or two-word name of a physical property. ?
1. A student weighs an empty special round bottom flask and stopper. He finds the mass to be 56.972 g. He then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 100°C. He allows all the liquid to vaporized and then removes the flask from the bath, stoppers it, and lets it cool. Upon cooling, he briefly removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 57.917 g. The volume of the flask is known to be 240.2 mL. The barometric pressure in the laboratory that day is 743 mm Hg. What was the pressure of the vapor in the flask in atm? O 0.9776 atm 0.98 atm 0.978 atm 0.977 atm
Pure vs Mixture Observation Cart Classification Table Mixture 12 Record your classifications below. Substance Heterogeneous Homogeneous Compound Element analgesic (Anacin or equivalent) baking soda epsom salt foll Matter salad dressing Pure Classification
At room temperature, nitrogen does not have a definite shape or volume. Which state is it In? water gas O solid liquid There are three main states of matter: solid liguid and gas All have different physical nroperties Which state NC TEST DELL & 4. 7 S C %# 3
The Scientific Method Group of answer choices isn't used much in modern chemistry. is a strict set of rules and procedures that lead to inarguable fact is based on continued observation and experiment is just a theory
A 355 g sample of water goes 85 degrees C to 42 degrees C. Calculate the amount of heat energy (in calories) involved in this process. Report the answer in significant figures.
1. Suppose some measurements are made on two different homogeneous stones to find out if they are made of the same kind of rock. The mass and volume measurements are listed below. Are the two stones the same type of rock? Why or why not? Show all calculations. Mass Volume 58.0 grams 50.1 grams 20.0 cm3 15.0 cm3 Stone 1 Stone 2
S S In France the price of gasoline averages around $ 1.04 per liter. Using unit analysis, calculate the cost of gasoline in France in dollars per gallon. Use one of the following to set up the conversion factor. 454 g = 1 lb = 16 oz 1 m = 39.4 in = 3.28 feet Visited $ 1.04 1 L 2.54 cm = 1 in 1 km = 0.621 miles 1 L=1.06 qt 3.79 L 1 gal (number) (number) Submit Answer (unit) (unit) Try Another Version 11 $ /gallon 1 item attempt remaining
Suppose some measurements are made on two different homogeneous stones to find out if they are made of the same kind of rock. The mass and volume measurements are listed below. Are the two stones the same type of rock? Why or why not? Show all calculations. Mass Volume Calculations Stone 1 58.0 g 20.0 cm Stone 2 50.1 g 15.0 cm3 21/common/assets/pdfjs/1.0.0.30/web/viewer.ht...ndered-pdf&fullscreen=Dd21-fileviewer-rendered-pdf-dialog&height=746#0
Determine whether each molecular diagram represents a pure substance or a mixture. If it represents a pure substance, classify the substance as an element or a compound. If it represents a mixture, classify the mixture as homogeneous or heterogeneous.

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