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.
Answer:
6.02×10^23 atoms
Explanation:
Avogadros constant is a number that states the amount of atoms in one mole of a substance which is 6.02×10^23 to 3 significant figures.
For this problem, let us first determine the total amount of the accumulation of the collection of coins and the total number of coins. Each penny values to 1. A dime is to 10, and a quarter would be 25. There are 15 pennies, 12 dimes, and 7 quarters. So the equation would be:
15 (1) + 12 (10) + 7 (25) = total amount
Let's solve.
15 + 120 + 175 = total amount
135 + 173 = total amount
308 = total amount
For the total number of coins, it goes like this:
15 + 12 + 7 = total number of coins
Solve
27 + 7 = total number of coins
34 = total number of coins
Since 100 pennies or 10 dimes or 4 quarters would equal to 1 dollar, the total amount would be 3 dollars and 8 cents or simply $3.08 with the total number of coins as 34.
To get percentage, simply divide 15 with the total number of coins which is 34 and multiply it by a 100. It will look like this:
(15/34) x 100 = percentage
solve
00.4411764 x 100 = percentage
44.11764% = percentage
let us round it off to the nearest hundredths
44.12% = percentage
The percentage of pennies in the collection would be 44.12%
Answer:
carbon-14
Explanation:
becouse protons and neutrons are nagetivly charged