1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Airida [17]
3 years ago
9

What has caused air quality in United States to improve/get better since the 1950s?

Chemistry
2 answers:
weeeeeb [17]3 years ago
8 0

Answer:

better mileage on cars, took lead out of paint, smaller packaging like for delivery and store products, EPA laws updating

stealth61 [152]3 years ago
8 0

Answer:

Reducing pollution from transportation sources has led to healthier air for Americans. In cities, smog has been visibly reduced.

Explanation:

i hope this helped

You might be interested in
An order is given to administer methylprednisolone, an anti-inflammatory drug, by IV at a rate of 39 mg every 30 min. The IV bag
Korvikt [17]

Answer:

The Flow rate = 0.0208 mL/min

Explanation:

Data provided:

Rate of dose = 39 mg every 30 min = (39/30) mg/min  = 1.3 mg/min

also,

125mg of methylprednisolone is present in every 2 mL

thus,

concentration = (125/2) mg/mL = 62.5 mg/mL

Now,

The flow rate is given as:

Flow rate = Rate / Concentration

on substituting the respective values, we get

Flow rate = (1.3 mg/min) / (62.5mg/mL)

or

The Flow rate = 0.0208 mL/min

3 0
3 years ago
lanets formed from ____ left over from the formation of the Sun at the center of the cloud. a. gravel c. solar wind b. gas, ice,
vodka [1.7K]
Might be solar but I may be wrong
4 0
3 years ago
Read 2 more answers
A chemistry student was asked to calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron
Delicious77 [7]

Answer:Write and balance the equation

4Fe + 3O2 -> 2Fe2O3

0.32 mol Fe x 2 mol Fe2O3 / 4 mol Fe =

0.16 mol of Fe2O3

Explanation:

8 0
3 years ago
If a substance has a temperature of 273 kelvins, what is its temperature in degrees celsius?
kipiarov [429]
It is at 0 degrees Celsius
5 0
3 years ago
0.0045 x 0.000789 sig fig
lesantik [10]

Answer:

The answer IS 0.0000035505. Hope it helps!

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • (scientific investigations) help please.
    12·1 answer
  • Certain compound contains 7.3% carbon, 4.5% hydrogen, 36.4% oxygen, and 31.8% nitrogen. It’s reality molecular mass is 176.0. Fi
    11·1 answer
  • What happens to your mass when your on top of a mountain?<br>​
    7·1 answer
  • Which of the following describes the bond between nitrogen atoms in an N, molecule? (1) 2 electrons are shared (2) 4 electrons a
    9·1 answer
  • What is the wavelength of electromagnetic radiation with a frequency of 5.00 x 10^12 Hz? S
    6·1 answer
  • Which model of the solar system is shown here?
    5·2 answers
  • What is photolytic decomposition reaction ???​
    9·2 answers
  • Which description accurately represents a water molecule? (1 point)
    8·2 answers
  • Plz help ASAP <br> Dhdhdg
    7·1 answer
  • A bicycle tire is filled with air to a pressure of 100. psi at a temperature of 19C. Riding the bike on asphalt on a hot day inc
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!