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creativ13 [48]
3 years ago
9

Are silver spoons tarnished and turned black, chemical or physical property?

Chemistry
1 answer:
zavuch27 [327]3 years ago
4 0
He ability to rust is a chemical property of iron. The metal silver does not rust, but eventually a darker substance called tarnish forms on its surface. The chemical properties of copper cause it to become a blue-green color when it is exposed to air
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C3H8 +502 + 3CO2 + 4H2O
astra-53 [7]

Answer:

Explanation:

first, you calculate the amount of O2 in moles:

98.0 ÷ 32 = 3.0625

second, the ratio if O2/C3H8 is 5 so you need to calculate O2 in moles with that:

3.0625 ÷ 5 = 0.6125

third, the amount of CO2 in moles also can be calculate by the ratio of C3H8/CO2 which is 3

0.6125 × 3 = 1.8375

then multiply CO2 in moles by its molar mass which is 44 g/mol

1.8375 × 44 = 80.85g

5 0
3 years ago
Which of these plants make the enviroment pleasant<br><br> a.sandalwood b.basil c.brahmi
liberstina [14]

Sandalwood

Explanation:

this is the answer please mark me as brainleist

4 0
3 years ago
The solubility of Z is 60 g/ 100 g water at 20 °C. How many grams of solution are produced when a saturated solution is prepared
V125BC [204]

Answer:

Saturated solution = 180 gram

Explanation:

Given:

Solubility of Z = 60 g / 100 g water

Given temperature =  20°C

Amount of water = 300 grams

Find:

Saturated solution

Computation:

Saturated solution = [Solubility of Z] × Amount of water

Saturated solution = [60 g / 100 g] × 300 grams

Saturated solution = [0.6] × 300 grams

Saturated solution = 180 gram

3 0
3 years ago
In an oven, 7000 kg of limestone are heated to over 900ºC to give lime and carbon dioxide. Assuming all calcium carbonate reacts
kirill [66]

Answer:

3920kg of lime(CaO)   1568m^3 of CO2

Explanation:

I attached the explanation!

also for calculating the volume I assumed Standard Temperature and Pressure(STP).

5 0
3 years ago
In a chemical reaction, the mass of the products is equal to __. 11
Deffense [45]
The answer for that is 16, math right?
7 0
3 years ago
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