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olga nikolaevna [1]
2 years ago
6

URGENT !!!! write a letter to the "city council" PLEASE HELP ILL GIVE THE BRAINIEST AND A BUNCH OF POINT !!What happens to pure

substances and mixtures we create and use in our homes and businesses? As a Material Engineer you have been hired by your city council to investigate how to safely handle waste in your community. For example, household toxic waste (batteries, paint, cleaners), sewage, pesticides. Research household carbon monoxide, lead, bleach, and paint to determine if they are a pure substance or a mixture. Choose 1 pure substance example and 1 mixture example to compare and contrast in a presentation to the City Council along with a plan for how each can be safely disposed of into the environment.
Chemistry
1 answer:
aleksley [76]2 years ago
4 0
Bleach and anytype of cleaner like window cleaner or disinfectant is very dangerous because if you mix those two together it might cause a very deadly fume and can cause lung failure and death within about 5 hours
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A solution containing 60 grams of nano3 completely dissolved in 50. Grams of water at 50°c is classified as being
Igoryamba

Answer:

<em>A solution containing 60 grams of nano3 completely dissolved in 50. Grams of water at 50°c is classified as being</em> <u>supersaturaded</u>

Explanation:

This question is about solubility.

Regarding solubility, the solutions may be classified as:

  • Unsaturated: the concentration is below the maximum concentration permited at the given temperature.

  • Saturated: the concentration is the maximum permitted at the given temperature, under normal conditions.

  • Supersaturated: the concentration has overcome the maximum permitted at the given temperature. This is possible only under special conditions and is a very unstable state.

Each substance has its own, unique solubility properties. So, in order to tell the state of the solution you need to compare with either solubility tables, or solubility curves; or run you own experiments.

  • In internet you can find the solubility curve of NaNO₃ showing the solubility for a wide range of temperatures.

  • In such curve the solubility of NaNO₃ at 50°C is about 115 g of NaNO₃ per 100 g  of water.

  • Hence, do the proportion to determine the amount of solute that can be dissolved in 50 grams of water at 50°CÑ

       115 g NaNO₃ / 100 g H₂O = x / 50 g H₂O  ⇒ x =  57.5 g NaNO₃

  • <u>Conclusion</u>: 50 grams of water can contain 57.5 g of NaNO₃ dissolved; so, <em>a solution containing 60 g of NaNO₃ completely dissolved in 50 grams of water is supersaturated.</em>

<em />

3 0
3 years ago
1. A 1500kg car is being lifted by a hydraulic jack attached to a flat plate. Underneath the plate is
AURORKA [14]

Answer:

the pressure in the pipe in the case when there is no net force on the car is  81,726 N/m^2

Explanation:

a. The computation of the pressure in the pipe in the case when there is no net force on the car is shown below

As we know that

Pressure = F ÷ area

Also

F = mg

Now

= (1500 × 9.8) ÷π (0.24)^2

= 81,726 N/m^2

Hence, the pressure in the pipe in the case when there is no net force on the car is  81,726 N/m^2

5 0
3 years ago
Assuming the substance is one of those listed in the table presented in this lesson, what is the identity of the substance?
zepelin [54]

The identity of the substance is Iron.

<h3>Properties of Iron</h3><h3>Chemical properties</h3>
  • The element iron has the atomic number 26 and the symbol Fe
  • Electronic configuration of Fe is [AR] 3d6 4s2
  • The atomic weight of Iron is 55.847
  • The element iron belong to the group VIII of the periodic table
  • It is the fourth most prevalent element in the crust of the world
  • It is a highly reactive element as it gets rusted readily in the moisture of air
<h3>Physical properties</h3>
  • It is a heavy metal in the first transition series  
  • The color of iron is silvery grey
  • High malleability and ductility
  • It has a strong electrical conductivity.  

Learn more about periodic table on

brainly.com/question/2140373

#SPJ1

8 0
1 year ago
Read 2 more answers
PLZ HELP PLZ PLZ ILL MARK AS BRAINLIESTT!!!!
LuckyWell [14K]

Q.1-

Given,

mass - 10grams

volume - 24 cm³

density = mass/volume

density = 10/24

density = 0.416 g/cm³

Q.2-

Given,

mass - 700grams

volume - 1100cm³

density = mass/volume

density = 700/1100

density = 0.6363 g/cm³

5 0
3 years ago
A chemical reaction that has the general formula of AB + CB + Als best classified as a
d1i1m1o1n [39]

Replacement  I think, hope this helps ;)

Explanation:

4 0
3 years ago
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