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IgorC [24]
4 years ago
12

Is the volume of a coffee cup closer to 300 cm cubed or 300 dm cubed

Chemistry
1 answer:
riadik2000 [5.3K]4 years ago
8 0

Answer:

It is closer to 300 cm cubed

Explanation:

The volume of a coffee cup is closer to 300 cm cubed because their american volumes are around 10 ounces, and 10 ounces equals about 300 cm cubed. Hope it helps!

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5. Two reactants combine to form a product in the reaction A + B -> C. The rate of the reaction depends on the concentrations
Rina8888 [55]

Answer:

C. 2.

Explanation:

The total reaction order of this reaction is second order (2). For a second order reaction ,the rate  depends on two variable concentration terms which may or may not be same.

Given that:

Two reactants combine to form a product in the reaction  A + B → C

The above reaction is bimolecular as two molecules are involved in the reaction.

If C_A and C_B are the concentrations of A and B respectively at any time t, then assuming  that the reaction is of first order with respect to both A and B , the overall order is second and the reaction rate is given by:

\mathbf{\dfrac{-dC_A}{dt}=\dfrac{-dC_B}{dt}=k_2C__AC_B}

where;

\mathbf{k_2} = specific rate constant for a second order reaction and becomes the rate of the reaction when both C_A and C_B are unity.

4 0
3 years ago
A change in odor can also be a clue that a chemical change has occurred. Describe at least one situation in which you might be l
Anna71 [15]

Answer:

When you bake a cake the smell changes after it has been baked and it counts as a chemical change

Explanation:

4 0
3 years ago
Percent Composition of KOH
Alika [10]
Hydrogen H 1.797%
Oxygen O 28.517%
Potassium K 69.687%
7 0
3 years ago
I need help can someone help me
Arisa [49]

Answer:

Option D. The number of oxygen atom is the same before and after the reaction.

Explanation:

From the question given above, the following were obtained:

Robin's equation:

H₂ + O₂ —> H₂O

Alex's equation

2H₂ + O₂ —> 2H₂O

To know which equation better represents the reaction, we shall determine which of the equation is balanced.

For Robin:

H₂ + O₂ —> H₂O

Element >>> Reactant >>> Product

H >>>>>>>>> 2 >>>>>>>>>> 2

O >>>>>>>>> 2 >>>>>>>>>> 1

Robin's equation is not balanced because the number of atoms of each element in the reactant and product are not equal.

For Alex:

2H₂ + O₂ —> 2H₂O

Element >>> Reactant >>> Product

H >>>>>>>>> 4 >>>>>>>>>> 4

O >>>>>>>>> 2 >>>>>>>>>> 2

Alex' equation is balanced because the number of atoms of each element in the reactant and product are equal.

Thus, option D gives the right answer to the question.

6 0
3 years ago
How do how do you know the number of valence electrons in an atom from the periodic table? User: How do you know the number of v
Pachacha [2.7K]
The valence electrons is last outer shell of an atom. So it is the last number of the electron configuration on the periodic table.
4 0
3 years ago
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