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Mashutka [201]
3 years ago
13

Name some gaseous element in unpolluted air ?

Chemistry
2 answers:
Veronika [31]3 years ago
8 0
Oxygen because trees release oxygen. Carbon dioxide because we release it when wr breathe out. Nitrogen because the atmosphere contains a certain amount of it.
Temka [501]3 years ago
5 0
Nitrogen oxygen and argon
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___∆ 1. Erosion is / is not caused by water, ice, wind, chemicals, and sand. (pick one)
svlad2 [7]

Answer:

1. Chemicals

2. Erosion

3. Solids

4. Expands

5. Chemical

6. Arch

7. Sand

8. Surface

Explanation:

7 0
3 years ago
Our good friend and pseudo scientist, homer simpson, attempts to analyze 300 mg of an unknown compound containing only c and h b
iragen [17]
C_{x}H_{y} + O_{2} --\ \textgreater \  x CO_{2} + \frac{y}{2} H{2}O

540mg H_{2}O* \frac{1 mmol H_{2}O}{18 mg H_{2}O} =30 mmol H_{2}O

\\ \\30 mmolH_{2}O   -have  -  60 mmol H
\\  \\ 60 mmol H* \frac{1mg H}{1 mmol H}    =60 mg H
\\ \\300mg C_{x}H_{y} - 60 mg H= 240 mg C
\\ \\ 240 mgC* \frac{1mmol}{12mg} =20 mmol C

20 mmol C: 60 mmol H=1 mol C : 3 mol H


7 0
4 years ago
A box is pushed across the floor for a distance of 5 metters with a force of 50N in 5 seconds. a. how much work is done? b. what
Reptile [31]

Answer:

50W

Explanation:

The formula and is

W = F × s

(force x distance)

W= 50 N× 5 m =250 N m=250 J

Done in 5 seconds the power is

p

=

W

t

where

t

=time

p

=

250

J

5

=

50 J

/s

=50 W

6 0
2 years ago
Read 2 more answers
Why is there a discrepancy between a heat of reaction ob-tained from calorimetry and one obtained from bond energies?
Eva8 [605]

While bond energies and bond enthalpies can be used to estimate the heat of reaction (enthalpy change of a reaction), H, the heat of neutralization is the heat released when 1 mole of water is generated by the reaction of an acid and a base (reaction).

For the same type of bond, bond enthalpies differ from compound to compound. For instance, the C-H bond enthalpy in methane is nearly identical to that of ethane, butane, etc. When we look up the bond enthalpy for a C-H bond in a table of bond enthalpies, the average number that results may only be accurate to two or three significant figures.

Each compound's enthalpies of production are listed, and those numbers take into account any minor variations in the enthalpies of each bond. Therefore, the result will be more accurate if you utilize formation enthalpies rather than average bond enthalpies to compute a given reaction's enthalpy change.

Learn more about Bond enthalpy here-

brainly.com/question/9998007

#SPJ4

7 0
1 year ago
How was the work of Newlands similar to that of Mendeleev on the periodic table?
kiruha [24]
It was similar because  they both arranged the elements in order of increasing atomic mass.
8 0
3 years ago
Read 2 more answers
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