It is very important that the 2.5 M HCl can be added dropwise, slowly and carefully in order to make a good mixture.
<h3>Why HCl can be added dropwise, slowly and carefully?</h3>
Hydrochloric acid can be added in the solution dropwise and slowly in order to mix with the solution very well. This acid should also be mixed with the solution carefully.
This is because hydrochloric acid is a strong acid which can damaged the skin if it is not carefully pour into the solution so we can conclude that HCl can be added dropwise, slowly and carefully is very important in order to make a good mixture.
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Answer:
iron .. titanium.. nickel....aluminum... sulfur... and calcium
Answer:
I'm pretty sure its C. limestone.
Percent yield is 23.11 % when 162.8 g of CO2 are formed from the reaction of excess amount of C8H18 and with 218.0 grams of O2.
Explanation:
Balanced equation for the chemical reaction:
2C8H18 + 25O2 → 16CO2 + 18H2O
data given:
CO2 formed (actual yield) = 162.8 grams
mass of oxygen = 218 grams
16 moles of CO2 formed when 5 moles of oxygen reacted
3.6 moles of CO2 formed when 6.8 moles of oxygen reacted.
In the reaction 16 moles of CO2 will have 44.01 x 16
theoretical yield of CO2 = 704.16 grams
percent yield = x100
putting the values in the above equation
percent yield = x 100
= 0.23 x 100
= 23.11 %
Percent yield is 23.11 %.
Example 1: FOREST FIRES
September 24, 2015 - Forest Fire in Indonesia continue to cause smog and haze (Atmosphere) across the region, with air pollutants reaching hazardous levels overnight in Singapore.
The poor air quality shift in wind direction transporting smoke and haze from land and forest (Biosphere) fires in South Sumatra, Indonesia. Their District continues to lead in the number of active fire alerts, with 423 hotspots (Lithosphere) in the last week.
The particulate matter in the air falls out, smothering plants, enriching the soil and thereby moving towards seas, rivers (Hydrosphere) and other water forms that can endangered human's health.
Example 2: DROUGHT
April 8, 2016- Swathes of corn stand withered on the parched rolling hills near the farming town in the Southern Philippines, while shallow cracks scar were once fertile rice paddies. (Biosphere)
El Nino is wreaking havoc in agriculture-rich Cotabato province.
That the villagers are in difficult situation of nothing else to eat. After a lot of incident happened, one of the villagers complained back pain and headache after the rough sleeping of several days.
Unfortunately, he died due to heat stroke of the recent changes in temperature due to Global Warming. (Atmosphere) The animals have nothing to feed the fields are dry making the soil (Geosphere / Lithosphere) less fertile for plants.
The farmers experienced scarce of water (Hydrosphere), crop failures and starving, land drying livestock as well as shortage of potable water.