1. An archeology student found a coin at a dig. She determined that the mass of the coin is 4.51 g and its volume is 0.49 cm?. Using the table below, what metal is the coin most likely made of? Name of Metal Density (g/cm) Aluminum 2.7 Zinc 7.1 Copper 9.0 Silver 10.5 Lead 11.4 Gold 19.3 A. Zinc B. Copper C. Silver D. Aluminum 2. Fireworks that contain metallic salts can generate bright colors. A technician investigates what colors are produced by the metallic salts by performing flame tests. Each metallic salt emits a characteristic colored light in the flame. Table 1: Flame Test for Different Metallic Salts Metallic Salt Flame Color Sodium Chloride Yellow Lithium Chloride Red Cesium Chloride Lilac Barium Nitrate Green Sodium Nitrate Yellow Lithium Nitrate Red If the technician tests an unknown metallic salt and sees a red color in the flame, what conclusion could be made? A. The unknown substance must contain nitrate. B. The unknown substance must contain chloride. C. The unknown substance must contain lithium. D. The unknown substance cannot be identified.

How much would a 138g piece of iron occupy?

M Apple Google Disney ESPN Yahoo! Biomedical Careers Program ☆ For the reaction Fe(s) +2HCl(aq)→→→→→FeCl₂(s) + H₂(g) AH° = -7.4 kJ and AS° = 107.9 J/K B Submit Answer Apple ☆ prod03-cnow-owl.cengagenow.com iCloud Yahoo Images Bing Google Wikipedia Facebook Twitter LinkedIn G b COWLv2... b D2L D2L D2L [Review Topics] [References] Use the References to access important values if needed for this question. D2L The maximum amount of work that could be done when 2.08 moles of Fe(s) react at 286 K, 1 atm is Assume that AH° and AS° are independent of temperature. Retry Entire Group 4 more group attempts remaining The Weather Channel C D2L Yelp TripAdvisor M kJ. +

Not chemical but forms! such as button, images What are some of the basic form elements you encounter every day? What form elements do you prefer working with?

A _____ change involves atoms being rearranged into new combinations, resulting in new compounds.     Chemical     Physical     Hypothesis     Mixture