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valentina_108 [34]
3 years ago
11

When a 500. gram sample of water at 19.0°C absorbs 8400 Joules of heat, the temperature of the water

Chemistry
1 answer:
Westkost [7]3 years ago
7 0

Answer: 23.0ºC

Explanation:

Just trust me

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What is the linkage that binds one monosaccharide to another?
ra1l [238]

Answer:

hope this helps

Explanation:

glycosidic bond

A covalent bond formed between a carbohydrate molecule and another molecule (in this case, between two monosaccharides) is known as a glycosidic bond (Figure 4). Glycosidic bonds (also called glycosidic linkages) can be of the alpha or the beta type.

4 0
3 years ago
Read 2 more answers
A solution is prepared by diluting 43.5 mL of 6.5×10?2M Ba(OH)2 to a volume of 270.5 mL .
salantis [7]

Answer:

The pH of the solution is 12.31 .

Explanation:

Initial molarity of barium hydroxide =M_1=6.5\times 10^{-2}M

Initial volume of barium hydroxide =V_1=43.5 mL

Final molarity of barium hydroxide =M_2

Final volume of barium hydroxide =V_2=270.5 mL

M_1V_1=M_2V_2

M_2=\frac{6.5\times 10^{-2}M\times 43.5 mL}{270.5 mL}

M_2=0.0104 M

Ba(OH)_2\rightarrow Ba^{2+}+2OH^-

1 mol of barium gives 2 mol of hydroxide ions.

Then 0.0104 M of barium hydroxide will give:

2\times 0.0104 M=0.0208 M of hydroxide ions

[OH^-]=0.0208 M

pH=14-pOH=14-(-\log[OH^-])

pH=14-(-\log[0.0208 M])=12.31

The pH of the solution is 12.31 .

4 0
3 years ago
How many black men were studied in the Tuskegee experiment?
anygoal [31]

Answer:

600 black men

Explanation:

309 with syphilis and 201 did not have the disease

4 0
3 years ago
C28H36O18 would be classified as what? How do you know this? M
sveta [45]

Answer:

It is an saturated compound since there are no c-c double or tripple bonds.

Explanation:

If we had such double or tripple bonds the remaining o &H atoms cannot be accommodated to the carbon chain.

the carbon skeleton has (26×2)+6=58 valence electrons

O occupies 2 for each

18×2= 36

,58-36=22

only 22H can be directly bonded to the carbon skeleton.

remaining H= 14

therefore 7carbonyl carbon atoms will have to turn into carbinol carbon atoms .

so no space for c-c double bonds

3 0
4 years ago
Ethyl alcohol is prepared industrially by the reaction of ethylene, C2H4, with water. What is the percent yield of the reaction
vovikov84 [41]

Answer:

% yield = 62.21 %

Explanation:

  • C2H4(g) + H2O(l) → C2H6O(l)

∴ mass C2H4(g) = 4.6 g

∴ mass C2H6O(l) = 4.7 g

  • % yield = ((real yield)/(theoretical yield))×100

theretical yield:

∴ molar mass C2H4(g) = 28.05 g/mol

⇒ mol C2H4(g) = (4.6 g)*(mol/28.05 g) = 0.164 mol

⇒ mol C2H6O(l) = (0.164 mol C2H4)*(mol C2H6O(l)/molC2H4(g))

⇒ mol C2H6O(l) = 0.164 mol

∴ molar mass C2H6O(l) = 46.07 g/mol

⇒ mass C2H6O(l) = (0.164 mol)*(46.07 g/mol) = 7.55 g

⇒ theoretical yield = 7.55 g

⇒ % yield = (4.7 g)/(7.55 g))*100

⇒ % yield = 62.21 %

8 0
3 years ago
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