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sweet [91]
3 years ago
7

Oil is a fossil fuel used to run cars, heat up homes, and produce electricity. Oil can be removed from the bottom of the ocean t

hrough drilling. Drilling machines dig deep down into the Earth. When oil is found, pipes carry it to the surface. Sometimes, accidents happen that cause the oil to spill into the oceans. The oil can not only kill marine organisms, but when it reaches the surface of the water, some chemicals evaporate, become part of the atmosphere, and pollute the air.
Based on the passage, which resources and organisms are affected by oil spills? Select three options.
air
land
water
birds in the air
trees on land
organisms in water HELP
Chemistry
2 answers:
Crazy boy [7]3 years ago
8 0
The answers would be organisms in water, water, and air.
KonstantinChe [14]3 years ago
7 0

Answer:

air, water and organisms in water

Explanation:

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Calculate the mass of NaCl required to prepare 0.5 liters of a 2.5 molar solution of NaCl.
MArishka [77]
The answer is C. Here is the work:

<span>Moles=molarity * volume
2.5 * 0.5 = 1.25mols of NaCI
Mm of NaCI= 58.442468/mol
Multiply the moles by the Mm and you get the grams
1.25 * 58.442468 =73.1g


</span>
8 0
3 years ago
What determines how the atoms are organized on the periodic table of elements?
tresset_1 [31]
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
4 0
2 years ago
The term “ sea of electrons “ refers to
andrey2020 [161]

Answer:

Explanation:

Basically in metallic bonds, valence electrons are not localied which means they can freely move from one atom to another. Thus, they move in "sea of electrons" because in a sea water or waves are freely moving without any localization.

Hope that helps.

8 0
3 years ago
At − 12.0 ∘ C , a common temperature for household freezers, what is the maximum mass of sorbitol (C6H14O6) you can add to 2.00
allochka39001 [22]

Answer:

2,347.8 grams

Explanation:

The freezing point depression Kf of water = 1.86° C / molal.

 

To still freeze at -12° C, then the molality of the solution 12/ 1.86 = 6.45 moles

 

The molecular weight of sorbitol (C6H14O6)is:

 

6 C = 6 ×12 = 72

14 H = 14 × 1 = 14

6 O = 6 × 16 = 96

...giving a total of 182

 So one mole of sorbitol has a mass of 182 grams.

 

Since there are 2 kg of water,  2 × 6.45 moles = 12.9 moles can be added to the water to get the 12° C freezing point depression. 

Therefore

grams = moles × molar mass

12.9 moles × 182 grams / mole = 2,347.8 grams of sorbitol can be added and still freeze

7 0
3 years ago
The structure of melatonin incorporates two nitrogen atoms. What are the hybridization state and geometry of each nitrogen atom?
nydimaria [60]

Let us see the structure of given compound melatonin


The two nitrogen atoms appear to be sp3 hybridized but the actual hybridization of both the nitrogens in the structure is sp2 as they have to gain planar geometry so that they can participate in the resonance making the compound more stable

so answer is

sp2 hybridized

trigonal planar geometry

4 0
3 years ago
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