Chemistry

Chemistry, 09.07.2019 19:00, crjjk01

Which of the following metals may tarnish to a greenish-blue color called verdigris a- silver b- chromium c- gold d- copper

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History, 17.07.2019 12:30, sierram298

Which metals were the first to be used during the neolithic age? a) bronze and silver because they could be heated and poured into molds b)silver and gold because they could be found in river beds c)gold and copper because they were soft enough to be hammered d)iron and copper because they were more plentiful than other metals

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Mathematics, 22.07.2019 19:20, versaceblooper

Gold used to make jewerly is often a blend of gold, silver, and copper. consider three alloys of these metals. the first alloy is 75% gold, 5% silver, and 20% copper. the second alloy is 75% gold, 12.5% silver, and 12.5% copper. the third alloy is 37.5% gold and 62.5% silver. if 100 g of the first alloy costs $2500.40, 100 g of the second alloy costsnbsp $ 2537.75, and 100 g of the third alloy costs $ 1550.00, how much does each metal cost?

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Chemistry, 03.09.2019 23:30, iibabycarrotsii

To save time you can approximate the initial volume of water to ±1 ml and the initial mass of the solid to ±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? *20.2 g gold placed in 21.6 ml of water and 12.0 g copper placed in 21.6 ml of water. *20.2 g silver placed in 21.6 ml of water and 12.0 g silver placed in 21.6 ml of water. *15.2 g copper placed in 21.6 ml of water and 50.0 g copper placed in 23.4 ml of water. *15.4 g gold placed in 20.0 ml of water and 15.7 g silver placed in 20.0 ml of water. *20.2 g silver placed in 21.6 ml of water and 20.2 g copper placed in 21.6 ml of water. *11.2 g gold placed in 21.6 ml of water and 14.9 g gold placed in 23.4 ml of water.

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Chemistry, 12.09.2019 20:30, tinalmath

To save time you can approximate the initial volume of water to ±1 ml and the initial mass of the solid to ±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? (a) 20.2 g gold placed in 21.6 ml of water and 12.0 g copper placed in 21.6 ml of water. (b) 20.2 g silver placed in 21.6 ml of water and 12.0 g silver placed in 21.6 ml of water. (c)15.2 g copper placed in 21.6 ml of water and 50.0 g copper placed in 23.4 ml of water. (d) 15.4 g gold placed in 20.0 ml of water and 15.7 g silver placed in 20.0 ml of water. (e) 20.2 g silver placed in 21.6 ml of water and 20.2 g copper placed in 21.6 ml of water. (f) 11.2 g gold placed in 21.6 ml of water and 14.9 g gold placed in 23.4 ml of water.

Answers: 3

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Which of the following metals may tarnish to a greenish-blue color called verdigris a- silver b- chr...

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