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4 years ago

When might a plot of ln[a] vs time not yield a straight line?

1 answer:

6 0

Considering a reaction:
A → B
The rate equation may be described as:
r = -k[A]ⁿ
Taking the natural log,
ln(r) = -nln([A]) + ln(k)
Therefore, the only time the graph of ln[A] vs time will be a straight line is when the order of the reaction is 0, meaning the reaction is independent of reactant concentration.

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Mercury has a density of 13.55 g/mL .What would be the volume of a 122 g sample?

Salsk061 [2.6K]

Answer:

V = 9.0037

Explanation:

V = M/D

V = 122/13.55

V = 9.0037

4 0

3 years ago

Which of the following is true about the melting temperature of potassium chloride? The melting temperature is relatively high.

allochka39001 [22]

Answer:f

First option: the melting temperature is relatively high.

Explanation:

You can look at the melting temperature at any table that summarizes the main properties of this compound, potassium chloride.

Such melting point is 770 °C, which is relatively high.

Why is this?

Potassium chloride is a ionic compound formed by the cations of potassium, K⁺, and the chloride anions, Cl⁻. Its unit formula is KCl.

The ionic bond between K and Cl is possible because each K atom is able to yield its valence electron to one Cl atom which has 7 valence electrons.

Then, the K atoms become positive ions (cations) K⁺, while Cl atoms become negative ions (Cl⁻).

These two ions with opposite charge are bonded by the force of electrostatic attraction. This is a ionic bond.

Melting point, so as boiling point along with other physical properties, depends on the attraction force between the atoms.

Hence, since the attrative forces between the ions are relatively strong, the melting point of the ionic compounds, such as potassium chloride, are relatively high.

8 0

3 years ago

Dustin is mixing concrete. A formula for concrete calls for 3/8 gal of water. Dustin wants to make 7/9 more concrete than the fo

slava [35]

We can use a ratio to solve this question. Lets refer to the amount formed by the formula as a serving
1 serving needs 3/8 gal
We want to create 7/9 servings extra, so
1 + 7/9 = 16/7
1 : 3/8
16/7 : x
1/(3/8) = (16/7) / x
8 / 3 = 16x / 7
x = 7/6
He needs to use 7/6 gallons of water.

5 0

3 years ago

Imagine you are on a roller coaster. Imagine that you are riding a skateboard or running across a ball field. What are some clue

Alex787 [66]

✯Hello✯

↪ You can see the setting changing around you

↪ You can feel a higher pressure/wind on your face

↪ There is adrenaline going through you

↪ (if this isnt the context you are looking for just comment)

❤Gianna❤

4 0

4 years ago

What is one source of organic matter in soil ?

stealth61 [152]

The original source of the soil organic matter is plant tissue. In the forest, organic matter is added in the soil mainly in the form of fallen leaves. Under natural conditions, the tops and roots of trees, shrubs, grasses and other native plants annually supply large quantities of organic residues.

3 0

3 years ago