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3 years ago

2. A substance that is solid, has a shiny orange color, conducts electricity well, and melts

Chemistry

1 answer:

geniusboy [140]3 years ago

4 0

Answer: Aluminium

Explanation:

The metals are solid substances, they have shiny luster, they conduct electricity and have high melting point. The aluminium is a kind of metal that have a solid surface, it has a shiny luster, the surface of metal appears to be polished. It conducts electricity and can be used in electrical cords, connections, and devices. It has a high melting point.

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a chemical company makes pure silver by reacting silver nitrate with Zinc. the company needs to make 800 grams of pure silver fo

shutvik [7]

The reaction between zinc and silver nitrate is

$Zn + 2 AgNO3 \rightarrow Zn(NO3)2 + 2 Ag$

Moles of Zn = m /M = 599 /65 = 9.2 mol

Moles of AgNO3 = m /M = 1500 /169 = 8.87 mol

Silver nitrate is reacting completely to give silver

Thus, moles of Silver nitrate is equivalent to silver = 8.87

For mass of silver produced

m /M = 8.87 = m /107

m = 949.24 g

Hence, the given quantity of reactants are sufficient to produce 800 g of silver as the amount of silver produced is 949.24 g

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4 years ago

I wonder what avocado is made of

Alex17521 [72]

Answer:

The avocado consists of around 73% water, 15% fat, 8.5% carbohydrates — mostly fibers — and 2% protein. Half an avocado, at around 100 grams (g) contains 160 calories ( 1 ).

7 0

3 years ago

When naming a transition metal ion that can have more than one common ionic charge, the numberical value of the charge can be in

Ivenika [448]

Answer: C) Roman numeral following the name.

Explanation: If we want to name an ionic compound like NaCl then we can easily write its name. Na is sodium and Cl is chlorine. First we write the name of the metal ion and then the name of the anion it has. Here we have mono atomic ion and for these we use the suffix -ide. So, the name will be sodium chloride.

Now, if we have something like $FeCl_3$ and we write the name as Iron chloride, then it will not be correct since Fe is a transition metal and it shows +2 and +3 oxidation states. So, to overcome this difficulty, a roman numeral is used for the oxidation state of the metal ion. The name of above compound will be Iron(III)chloride. Similarly, if we have $FeCl_2$ then its name will be written as Iron(II)chloride.

In both the above names, the roman numerals (III) and (II) are indicating numerical value of the charge of the metal ion. So, the correct choice is C) Roman numerals following the name.

when naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge can be indicated by a Roman numeral following the name.

8 0

4 years ago

Which of the following statements is/are CORRECT?1. For a chemical system, if the reaction quotient (Q) is greater than K, react

tankabanditka [31]

Explanation:

A chemical equilibrium is defined as the state of reaction in which the rate of forward reaction is equal to the rate of backward reaction.

When Q > $K_{eq}$ , then it means that the reaction is proceeding in the backward reaction. Whereas if Q < $K_{eq}$ , then it means that the reaction is proceeding in the forward direction. Hence, formation of products will be favored.

On the other hand, if Q = $K_{eq}$ , then it means reaction is at equilibrium.

At equilibrium, it is not necessary that the concentrations of products divided by the concentrations of reactants equals one.

Thus, we can conclude that the statement for a chemical system at equilibrium, the forward and reverse rates of reaction are equal, is correct.

8 0

3 years ago

The competition between the U.S. and the Soviet Union to get satellites and humans into space was known as the:

Alex787 [66]

Answer: It was known as the SPACE RACE.

Explanation: The space race was a cold war between the Soviet Union (USSR) and the United States (US), to get satellites and humans into space. The competition began in earnest on August 2, 1955, when the Soviet Union responded to the US announcement. On April 12, 1961, the USSR surprised the world again by launching Yuri Gagarin into a single orbit around the Earth in a craft they called Vostok 1.

7 0

3 years ago