1. (6.6 A) Students were given four substances and asked to observe their 7 points characteristics. Their observations are shown in the table below. Which of
the unknown substances is MOST likely a METAL?
Observation of Unknown substances
Unknown
Observation
Appearance
Conduct electricity
NA
Black and gritty
Snaps easily into small
pieces
Yes
Shiny
Bends easily
NO
Blue
Bends and snaps back
into original shape
Yes
Gear
Shatter easily
0 1
O2
3
4
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Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Calcium chloride +gold(1) oxide—>

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2