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3 years ago

Sort each phrase into the appropriate category. Local or Global winds

Chemistry

2 answers:

Firlakuza [10]3 years ago

4 0

Answer:

I hope this helped. :)

Explanation:

The first and the second are in warm land breeze.

And the third and forth are in cool ocean breezes.

They are all in the second one.

Lina20 [59]3 years ago

4 0

It’s the second one. I’m gonna make you not have to read their sentence.

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Determine the mass of oxygen that is needed to react with 33 grams of phosphorus.

Kipish [7]

Answer:

D = Mass = 42.6 g

Explanation:

Given data:

Mass of phosphorus react = 33 g

Mass of oxygen needed = ?

Solution:

Chemical equation:

4P + 5O₂ → 2P₂O₅

Number of moles of phosphorus:

Number of moles = mass/molar mass

Number of moles = 33 g/ 30.97 g/mol

Number of moles = 1.065 mol

now we will compare the moles of phosphorus and oxygen.

P : O₂

4 : 5

1.065 : 5/4×1.065 = 1.33mol

Mass of oxygen needed:

Mass = number of moles × molar mass

Mass = 1.33 mol × 32 g/mol

Mass = 42.6 g

Thus, 43.6 g of oxygen needed to react with 33 g of phosphorus.

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3 years ago

The molecular mass of CO2 is 44.01 u. What is the mass of 2.0 mol of CO2?

Vesnalui [34]

Answer:

The mass of 2.0 mol of C02 is 44 grams

Explanation:

The weight of CO2 is 44 grams per mole (1 x 12 grams/mole for the carbon and 2 x 16 grams/mole for the oxygen atoms)

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3 years ago

Read the list of elements given below.

enyata [817]

<span>All of them are highly reactive nonmetals.</span>

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3 years ago

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If 29.4 mL of ethanol is dissolved in water to make 359 mL of solution, what is the concentration expressed in volume/volume % o

Sveta_85 [38]

Answer: $8.2\%$

Explanation:- Volume percentage is the ratio of volume of solute to the volume of solution defined in terms of percentage.

${\text {volume percentage}}=\frac{\text {volume of solute}}{\text {volume of solution}}\times 100\%$

Given: volume of solute = 29.4 ml

Volume of solution= 359 ml

${\text {volume percentage}=\frac{29.4}{359}\times 100\%=8.2\%$

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4 years ago

Write an equation for the reaction of the Tollens reagent<br> withheptanal?

dangina [55]

Answer:

$CH_3 CH_2 CH_2 CH_2 CH_2 CH_2 CHO + 2[Ag(NH_3)_2]+ 3 H_2 O$ = $CH_3 CH_2 CH_2 CH_2 CH_2 CH_2 COOH +2Ag + 4NH_3$

Explanation:

Tollens test is carried out to perceive difference between aldehydes and ketones on the basis of their capability to oxidized easily.

when Tollens react with aldehyde (heptanal) , a silver mirror is form on inner side of container.

The reaction between tollens and heptanal is given as

$CH_3 CH_2 CH_2 CH_2 CH_2 CH_2 CHO + 2[Ag(NH_3)_2]+ 3 H_2 O$ = $CH_3 CH_2 CH_2 CH_2 CH_2 CH_2 COOH +2Ag + 4NH_3$

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4 years ago