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sveticcg [70]
4 years ago
9

Describe how the metal probably increases the reaction rate, identify whether this an example of homogeneous or heterogeneous ca

talysts, and explain how you know.
Chemistry
1 answer:
Ulleksa [173]4 years ago
4 0

Explanation:

The metal probably helps to speed up the reaction rate a/c to collision theory, reactant molecules must collide with a reasonable direction by either weakening bonds in reactant molecules to make them extra reactive or by attaching reactant molecules in the exact direction to react.

This is known as an example of heterogeneous catalysis because the catalyst is solid and the reactants are liquid or gases mixture. In this catalysis, the catalyst is present in a different phase compare to the reactants.

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Three isotopes of silicon have mass numbers of 28,29, and 30 with an average atomic mass of 28.086 what does this say about the
Sedbober [7]

Answer is: silicon isotope with mass number 28 has highest relative abundance, this isotope is the most common of these three isotopes.

Ar₁(Si) = 28; the average atomic mass of isotope ²⁸Si.  

Ar₂(Si) =29; the average atomic mass of isotope ²⁹Si.  

Ar₃(Si) =30; the average atomic mass of isotope ³⁰Si.  

Silicon (Si) is composed of three stable isotopes, ₂₈Si (92.23%), ₂₉Si (4.67%) and ₃₀Si (3.10%).

ω₁(Si) = 92.23%; mass percentage of isotope ²⁸Si.  

ω₂(Si) = 4.67%; mass percentage of isotope ²⁹Si.

ω₃(Si) = 3.10%; mass percentage of isotope ³⁰Si.

Ar(Si) = 28.086 amu; average atomic mass of silicon.  

Ar(Si) = Ar₁(Si) · ω₁(B) + Ar₂(Si) · ω₂(Si)  + Ar₃(Si) · ω₃(Si).  

28,086 = 28 · 0.9223 + 29 · 0.0467 + 30 · 0.031.

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3 years ago
The watt is the standard unit of measurement for? ​
Crazy boy [7]

Answer:

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Which process is used by nuclear power plants to produce low cost, long lasting
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Answer:

Nuclear fission is the one used

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An aluminum block has a mass of 82.0 g and a volume of 12.8 cm3. what is the block's density to the nearest g/cm3?
aksik [14]
Density is mass over volume. If you put it into a formula it would look like this:

D = \frac{m}{v}

Based on the problem given, you can see that the mass of the aluminum block is 82.0 g and the volume is 12.8 cm3. Just put that into your equation and solve for it:

D = \frac{m}{V}=  \frac{82.0g}{12.8cm^{3} }  = 6.4g/ cm^{3}

The answer is then letter C.


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4 years ago
What makes carcinogens so dangerous? A. They can be used to make weapons. B. They are extremely toxic to the environment. C. The
rosijanka [135]
The answer is c. they cause cancer
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3 years ago
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