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Schach [20]
3 years ago
13

What is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 j/(gk, is heated from -25°c to -15°c

?
Chemistry
1 answer:
bonufazy [111]3 years ago
7 0
8 companies i looked it up on google and thats what it said hope its helpful

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As the mass of a sample increases, the number of moles present in the sample (increases)
Alex Ar [27]

Answer:

true. m (↑) ⇒ n (↑)

Explanation:

  • mass (m) ≡ moles ( n) × moleculas weight ( Mw )

In the previous expression, we appreciate that the mass is directly proportional to the moles; therefore, if the mass of the sample increases, its number of moles will also increase, since the molecular weight is always constant.

∴ m (↑) ⇒ n (↑)

3 0
3 years ago
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A chemical bond joins atoms or electrons? together in a molecule
Schach [20]
Electrons basically ARE the chemical bond.  The atoms are joined together by the bonds.
4 0
3 years ago
for the following reaction how many grams of h20 will be produced if you react 3.7 grams of B2H6? B2h6 +3O2-2hbo2+ 2 H20
Nana76 [90]

Answer:

4.8 g H₂O

Explanation:

To find the mass of water, you need to (1) convert grams B₂H₆ to moles B₂H₆ (via molar mass from periodic table), then (2) convert moles B₂H₆ to moles H₂O (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles H₂O to grams H₂O (via molar mass from periodic table).

It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 2 sig figs because the given value (3.7 grams) has 2 sig figs.

Molar Mass (B₂H₆): 2(10.811 g/mol) + 6(1.008 g/mol)

Molar Mass (B₂H₆): 27.67 g/mol

1 B₂H₆ + 3 O₂ ---> 2 HBO₂ + 2 H₂O
^                                             ^

Molar Mass (H₂O): 15.998 g/mol + 2(1.008 g/mol)

Molar Mass (H₂O): 18.014 g/mol

3.7 g B₂H₆          1 mole            2 moles H₂O           18.014 g
----------------  x  ---------------  x  -----------------------  x  -----------------  =  4.8 g H₂O
                          27.67 g           1 mole B₂H₆              1 mole

6 0
2 years ago
Hydrazine (N2H4), a rocket fuel , reacts with oxygen to form nitrogen gas and water vapor. The reaction is represented with the
Archy [21]

i think the answer is 1.56mol H2O

8 0
3 years ago
Do all colors of light travel at the same speed
bogdanovich [222]

Answer:

No because some lights we cannot see because they move to slow or they move to fast for our eye to see. There is just a small little gap compared to what light rays we can actually see. In this picture you can see what I mean.

Explanation:

5 0
3 years ago
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