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Lana71 [14]
3 years ago
5

Which of these is the best definition of a fuel cell?

Chemistry
2 answers:
nikitadnepr [17]3 years ago
7 0

C !

A voltaic cell that uses the oxidation of a fuel to produce electricity

Colt1911 [192]3 years ago
3 0

Answer:

D)

Explanation:

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What type of allele masks the expression of the recessive allele?
aniked [119]
The Dominant trait or allele masks the recessive because it is dominant. an easy way to remember this is how the lead wolf (dominant alleles) shows it's dominance over the rest of the pack (the recessive alleles)
8 0
3 years ago
__CH4+O2-->__CO2+__H2O
Temka [501]

CH4 + 2O2 --> CO2 + 2H2O

On the reactant side you start with 1 carbon, 4 hydrogen, and 2 oxygen. On the product side you start with 1 carbon, 2 hydrogen, and 3 oxygen. In order to get them equal, you need to put 2 in front of the H2O which equals out the number of Hydrogen on both sides. But Now we must balance the Oxygens. Because of the H2O we now have 4 Oxygens on the product side and only 2 on the reactant. In order to balance this, we put a 2 in front of the O2 giving us 4 hydrogen on both sides, Balancing the equation

7 0
3 years ago
Plz someone help with this
Fiesta28 [93]

Answer:

4 I believe is false and 5 is D I think

7 0
3 years ago
Read 2 more answers
Calculate the ph of a 0.25M solution of monochloroacetic acid at 25 c
Phoenix [80]
<h3>Answer: <em>pH=2.25 </em></h3>

Explanation:

monochloroacetic acid  also means: chloroacetic acid

pKa of monochloroacetic acid= 1.4 x 10^-3  (I believe this should have been given in the problem or perhaps in the textbook)

Formula: pH= pKa + log ( some number in M)

pH= -log (1.4 x 10^-3) + log (0.25M)= 2.85 + -0.602= 2.25

pH= 2.25  

8 0
3 years ago
Rank the following compounds in order of increasing solubility in water. Items (4 items) (Drag and drop into the appropriate are
charle [14.2K]

Answer:

CaO < BaO < KCl <KI

Explanation:

Let us remember that the solubility of an ionic substance in water depends on the magnitude of the lattice energy and the hydration energy.  If the hydration energy is equal to or is greater than the lattice energy, the substance dissolves in water.

However, the lattice energy depends on the size of the ions. The smaller the ions in the ionic compound, the higher the lattice energy and the lesser the solubility of the ionic compound.

KI has the least lattice energy and the highest solubility in water while CaO has the highest lattice energy and the least solubility in water.

6 0
3 years ago
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