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crimeas [40]
3 years ago
8

What information does the activity series of metals give?

Chemistry
1 answer:
Advocard [28]3 years ago
3 0

Answer:

The answer is A. It predicts if one metal will replace another metal in a compound

Explanation:

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I need help, I don't understand the question
rjkz [21]
The awnser is probably B
7 0
3 years ago
Which of the following is true of the electrons in the Bohr model of an atom?
NARA [144]

Answer:

They exist at specific energy levels

Explanation:

6 0
3 years ago
Severe or sudden changes in Earth's atmosphere can cause entire species of animals to die. When all of the members of species di
Oduvanchick [21]

Answer: Extinction

Animals on the verge of extinction are considered endangered species. Some could argue that the phrasing "threatened" is synonymous to "endangered". Some classify extinction based on if the species is completely wiped out in the wild, or if the species is completely gone (both in the wild and in zoos for instance). Extinction events are not solely due to the changes in atmosphere, but also due to lack of food or habitat, among other possible factors.

7 0
3 years ago
.War nickels, produced from 1942-1945 are composed of 56% copper, 35% silver and 9% manganese. How many moles of each element ar
AnnZ [28]
The moles  of each element  found in a 5.00 g nickel coin is calculated as below

moles =mass/molar mass

calculate the mass of each element  =% composition of element/100 x total mass of  nickel

Mn = 9/100 x5 = 0.45g
Cu=56/100 x5= 2.8 g
Ag= 35/100x5=  1.75 g
moles of each element is therefore=
Mn = 0.45g/54.94 =  8.19 x10^-3 moles

Ag=1.75g/107.87 g/mol = 0.0162 moles

Cu = 2.8 g/63.5 g/mol=0.0441  moles





3 0
3 years ago
Consider an ice cube with a volume of 0.50 cup. (1 cup = 240.0 mL, density of ice = 0.9167 g/mL). How many water molecules (mola
stealth61 [152]

Answer:

3.86x10^24 molecules

Explanation:

From the question given, the following data were obtained:

Volume of ice = 0.5cup

1 cup = 240mL

0.5cup = 0.5 x 240 = 120mL

Density of ice = 0.9167 g/mL

molar mass of water = 18.015g/mol

First let us calculate the mass of ice. This is illustrated below:

Density = Mass /volume

Mass = Density x volume

Mass = 0.9167 x 120

Mass of ice = 110.004g = Mass of water

From Avogadro's hypothesis, we understood that 1mole of any substance contains 6.02x10^23 molecules. This means that 1mole of water will also contain 6.02x10^23 molecules.

1mole of water = 18.015g

If 1 mole (18.015g) contains 6.02x10^23 molecules,

Therefore, 110.004g of water will contain = (110.004x6.02x10^23)/18.015 = 3.86x10^24 molecules

3 0
3 years ago
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