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Karolina [17]
3 years ago
11

What is the most important characteristic in determining an element’s properties?

Chemistry
1 answer:
lozanna [386]3 years ago
4 0
The number of electrons. The valence (outer) shell is particularly important.
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HOW CAN I DO AN EXPERIMENT WITH THIS THINGGGG I-
Vladimir79 [104]

Answer:

omg i love grass hopperszszszs

Explanation:

you should give it a mate

6 0
3 years ago
While performing the Acid-catalyzed Hydrolysis of Epoxides experiment you used a solution containing 1.84 mL of cyclohexene oxid
Elenna [48]

Answer:

The moles of starting material is 1.8212 \times 10^{-2} mole

Explanation:

Given:

Cyclohexene oxide material is used

Density = 0.97\frac{g}{mL}

Volume = 1.84  mL

Formula of Cyclohexene oxide = C_{6} H_{10} O

Molar mass is given by,

C = 6 \times 12 = 72

H = 10 \times 1 = 10

O = 1 \times 16 = 16

⇒ m' = 96\frac{g}{mol}

Mass m = 0.97 \times 1.84 = 1.7848 g

Moles is given by,

  n = \frac{m}{m'}

  n = \frac{1.7848}{98}

  n = 1.8212 \times 10^{-2} mol

Therefore, the moles of starting material is 1.8212 \times 10^{-2} mole

3 0
3 years ago
Many pollutants from coal-fired power plants are properly managed today. Which of the following is currently considered to be th
sammy [17]

Answer:

Sulfur dioxide

Explanation:

Sulfur dioxide (SO₂) is a colorless gas, which comes from burning fossil fuels like burning coal, oil and diesel from vehicles. This gas is also released into the environment through volcanic eruptions.

Sulfur dioxide is considered one of the worst air pollutants, mainly because it accumulates in droplets in the air and also because it reacts with other compounds in the atmosphere, forming particulate materials.

This gas is a major contributor to the warming of the planet. Its presence in acid rain (which makes it return from the atmosphere to the earth) is dangerous for plants and animals, in addition to corroding some materials and affecting monuments, buildings, statues.

Acid rain generated by SO₂ and other compounds can lower the pH of lakes and reduce fish populations. In plants, vegetables and flowers, it compromises production and growth.

In humans, sulfur dioxide can cause acute and chronic health effects, especially on the respiratory system, in addition to aggravating cardiovascular problems due to the simultaneous presence of SO₂ and particles in the atmosphere.

5 0
3 years ago
As the temperature of one of the four liquids increases, the vapor pressure will
s2008m [1.1K]

Answer:

a) increase exponentially.

Explanation:

The vapor pressure is depend only on temperature.

The vapor pressure of liquid does not depend upon amount of liquid. For example whether the liquid is 50 g or 30 g its vapor pressure will remain same according to the temperature.

The temperature and vapor pressure have exponential relationship. As the temperature of liquid increases its vapor pressure also goes to increase. When the temperature of liquid goes to decrease its vapor pressure also decreases.

The change in vapor pressure of substance when temperature changes is given as,

ln P₂/P₁ = ΔH(va)/R (1/T₁ - 1/T₂)

7 0
3 years ago
How much energy is required to melt 35.4 g of gold?
kap26 [50]

Answer:

To determine the amount of heat the gold has absorbed to melt, we simply multiply the mass of the block of ice to the heat of fusion of water which is given above. We calculate as follows:

Heat = 20.0 g (35.4 g)

Heat = 1290 J

4 0
4 years ago
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