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Minchanka [31]
2 years ago
15

Defenses such as your skin respiratory system, digestive and circulatory system

Chemistry
2 answers:
Mama L [17]2 years ago
4 0

Answer:

T cell

Explanation:

loris [4]2 years ago
4 0
3. T cell
Is the answer.
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What is the relationship between gravity and water
Leni [432]
Water Is A Liquid And Gravity Pulls Objects Up
7 0
3 years ago
What is the molality of a solution made by dissolving 15.20 g of i2 in 1.33 mol of diethyl ether, (ch3ch2)2o?
Paraphin [41]
The  molarity   of solution  made  by  dissolving  15.20g  of i2  in 1.33 mol  of diethyl ether (CH3CH2)2O  is    =0.6M

   calculation

molarity  =moles of solute/  Kg of the  solvent

mole  of the solute  (i2)  =  mass /molar mass
the molar mass of i2 = 126.9 x2 = 253.8 g/mol

moles is therefore=  15.2 g/253.8 g/mol  =  0.06  moles


calculate the Kg of solvent  (CH3CH2)2O
mass =  moles  x  molar mass
molar mass  of  (CH3CH2)2O= 74 g/mol

mass  is therefore = 1.33 moles  x  74 g/mol =  98.42 grams
in Kg = 98.42 /1000 =0.09842  Kg

molarity  is therefore = 0.06/0.09842 = 0.6 M

3 0
3 years ago
-3 × 4=? ....................​
blagie [28]

Answer:

-12

Explanation:

a negative times a positive is negative

8 0
3 years ago
Read 2 more answers
If 500g of copper melts at 1085°C, at what temperature would 250g of<br> copper melt?
Alex787 [66]

Answer:

the copper would melt at the same temperature no matter how much quantity there is so 1085

Explanation:

6 0
2 years ago
An alkyne with the molecular formula C5H8 was reduced with H2 and Lindlar's catalyst. Hydroboration-oxidation of the resulting a
irinina [24]

Since the addition of the H2O in the last step of hydroboration is anti-Markovnikov, the starting material is 1-pentyne.

The addition of H2 to C5H8 yields an alkene when a Lindlar catalyst is used. Recall that the Lindlar catalysts poisons the process so that the addition do not go on to produce an alkane.

When hydroboration is carried out on the alkene, we are told that a primary alcohol was obtained. We must note that in the last step of hydroboration, water is added in an anti- Markovnikov manner to yield the primary alcohol. Hence, the starting material must be 1-pentyne as shown in the image attached.

Learn more: brainly.com/question/2510654

6 0
2 years ago
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