All categories

3 years ago

245 -

Chemistry

1 answer:

Amanda [17]3 years ago

7 0

Answer: A nuclear accident

Explanation:

The Chernobyl nuclear accident is level 7 (according to the International Nuclear Event Scale), due to the high impact that caused serious consequences on the environment and living beings.

It should be noted that what happened in Chernobyl is considered one of the largest nuclear disasters in human history, because after the accident a large cloud with radioactive particles was found at a high altitude, scattering radiation all over the planet.

Furthermore, it is important to note that although the survival of wildlife in the Chernobyl region has currently been observed and some people still visit the site and others live there, the presence of humans in the place is prohibited.

You might be interested in

40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been ad

kirill115 [55]

Answer:

0.5 M

Explanation:

We have to start with the reaction between NaOH and CH3COOH:

$CH_3COOH~+~NaOH->CH_3COONa~+~H_2O$

We will have a 1:1 ratio between the acid and the base. The next step then would be the calculation of the moles of NaOH and his convertion to moles of CH3COOH.

$20~mL~\frac{1~L}{1000~mL} ~=~0.02~L$

$mol~=~0.1~M*0.02~L=0.02~mol~NaOH$

$0.02~mol~NaOH~\frac{1~mol~CH_3COOH}{1~mol~NaOH}=~0.02~mol~CH_3COOH$

The final step is the calculation of the concentration of the acid.

$M=\frac{0.02~mol~CH_3COOH}{0.04~L}=~0.5~M$

Due to the Ka value we can use the acetic acid as a strong acid.

6 0

2 years ago

Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displac

lara [203]

Answer:

Precipitation

Explanation:

Let's consider the balanced chemical equation between barium acetate and sodium carbonate to form barium carbonate and sodium acetate.

Ba(C₂H₃O₂)₂(aq) + Na₂CO₃(aq) → BaCO₃(s) + 2 NaC₂H₃O₂(aq)

Both products and reactants are salts. But, among the products, barium carbonate is solid. This allows us to classify it as a precipitation reaction.

4 0

2 years ago

0.03 mol of potassium nitrate, KNO3 dissolved in 1.2 dm3 distilled water. What is the solubility of potassium nitrate, KNO3 ?

Rufina [12.5K]

Answer:

$solubility=0.25mol/dm^3$

Explanation:

number of moles of solute=0.03mol

volume of solution in dm³=1.2dm³

solubility=?

as we know that

$solubility=\frac{number of moles of solute}{volume of solution indm}$

$solubility=\frac{0.03mol}{1.2dm^3}$

$solubility=0.25mol/dm^3$

i hope this will help you :)

3 0

3 years ago

Which equation is balanced?

Alenkinab [10]

Answer:

Zn + 2HCl → ZnCl2 + H2

Explanation:

Left

Zn=1

H=2

Cl=2

Right

Zn=1

H=2

Cl=2

5 0

3 years ago

The water lattice: a. is formed from hydrophobic bonds. b. causes ice to be denser than water. c. causes water to have a relativ

Alexus [3.1K]

Answer: Option (d) is the correct answer.

Explanation:

It is known that water loving bonds are called hydrophilic bonds and water hating bonds are called hydrophobic bonds. Since, water is a polar solvent and it is only able to dissolve polar molecules and not non-polar molecules.

Lattice of water and hydrogen bonding are responsible for the various properties of water like cohesion, adhesion, heat of vaporization etc.

Thus, we can conclude that water lattice excludes non-polar substances.

7 0

2 years ago