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Juliette [100K]
3 years ago
10

The EPA sets national air-quality standards for common air pollutants. The

Chemistry
1 answer:
Troyanec [42]3 years ago
7 0

Answer:

A

Explanation:

Just took the quiz

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What 3 sub types of covergent plate boundaries?
Virty [35]
(1) Ocean to Continent
(2)Continent to Continent
(3)Ocean to Ocean
are the three sub types of convergent plate boundaries.
5 0
3 years ago
!PLEASE HELP ME!
andrey2020 [161]

Answer:

1.4 g/cm³  

Step-by-step explanation:

1. Calculate the <em>volume of the block</em>

V = lwh

<em>Data: </em>

l   = 150     cm

w =     0.20  m

h  =     6.0 mm

(a) Convert all units to a <em>common base </em>

w  = 0.20 m × (100 cm/1 m)

w  = 20 cm

h   =    6.0 mm × (1 cm/10 mm)

h   =    0.6 cm

<em>Calculation: </em>

V = lwh

V = 150 × 20 × 0.60

V = 1800 cm³

2. Calculate the <em>density </em>

Density = mass/volume

<em>Data: </em>

m = 2.5 kg

<em>Calculation: </em>

m = 2.5 kg     Convert to grams

m = 2.5 kg × (1000 g/1 kg)

m = 2500 g

Density = 2500 g/1800 cm³

Density = 1.4 g/cm³

3 0
3 years ago
How many moles of N₂O₅ are produced when 3.00g of O₂ react completely in the following equation? 2N₂ + 5O₂ → 2N₂O₅ A. 0.0375 B.
a_sh-v [17]

Answer: A. 0.0375

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} O_2=\frac{3.00g}{32g/mol}=0.094moles

2N_2+5O_2(g)\rightarrow 2N_2O_5

According to stoichiometry :

As 5 moles of O_2 give = 2 moles of N_2O_5

Thus 0.094 moles of O_2 give =\frac{2}{5}\times 0.094=0.0375moles  of N_2O_5

Thus 0.0375 moles of N_2O_5 will be produced when 3.00g of O₂ react completely

4 0
4 years ago
Name (3) ways an animal can use energy from food?
fgiga [73]

Answer:

The food chain begins with the sun: plants get their energy by photosynthesizing sunlight into energy, and then herbivores eat those plants to get their energy. Carnivores who then eat the herbivores are getting that sunlight passed along from sun to plant to herbivore to carnivore.

3 0
3 years ago
The seeds of a dandelion are wispy and very light. A single dandelion produces many seeds. How does the structure of the seeds r
solmaris [256]

Answer:

the answer will be number...D

8 0
4 years ago
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