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Ulleksa [173]
3 years ago
12

Water has a density 1.0 g/cm3. What is the mass of 10.0 cm3 of water?

Chemistry
1 answer:
Drupady [299]3 years ago
4 0

1.0g/cm3 means that the mass of one cm3 is 1.0gThe easiest method to use is the rule of three, and let x be the mass of 10.0 cm3 of water1g -- > 1.0 cm3x --> 10.0 cm3x= (10*1)/1x=10.0 gSo the mass of 10.0 cm3 of water is 10.0g


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How is the amount of available sunlight most likely to affect the makeup of an ecosystem
Debora [2.8K]

Answer:

C. it will have more photosynthesis if it gets more sunlight

Explanation:

The amount of sunlight is crucial for what kind of an ecosystem will develop. This is because the sunlight is what enables the development of the producer communities. The producers use the sunlight in order to perform photosynthesis, so the more sunlight there is, the more photosynthesis they will perform. If there is lot of sunlight, then there will be an abundance of producers in the ecosystem, and since they are the basis of any ecosystem, there will be lot of consumers as well, thus the ecosystem will have an abundance of species from every trophic level.

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Carbon Dioxide in a 34 L container at a pressure of 387 mm Hg is transferred to a container with a pressure of 274 mm Hg. What i
AVprozaik [17]

Answer:

V2= 0.0796m3

Explanation:

We have that for a real gas the following relation is fulfilled:

PV / T = constant

To use this formula I need to pass the pressure of mmHg to KPa and the volume of L to m3, knowing that

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So i can say

P1V1/T1 =P2V2/T2

So

V2= P1V1T2/P2T1

V2= 51.60KPa*0.034m3*350k/36.53KPa*211k

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A solution containing HCl and the weak acid HClO2 has a pH of 2.4. Enough KOH (aq) is added to the solution to increase the pH t
astraxan [27]

Answer:

\boxed{\rm \text{[ClO$_{2}^{-}$] increases}}

Explanation:

At the beginning, you have two reactions happening:

\rm HCl + H$_{2}$O$ $\, \longrightarrow \,$ H$_{3}$O$^{+}$ + Cl$^{-}$\\\rm HClO$_{2}$ + H$_{2}$O$ $\, \rightleftharpoons \,$ H$_{3}$O$^{+}$ + ClO$_{2}^{-}$

As you add KOH(aq), it does two things:

  1. It increases the volume of the solution.
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A) The HCl is completely ionized. The Cl⁻ does not react, but it is diluted when the volume of the solution increases. [Cl⁻] decreases.

B) The KOH reacts with the H⁺ and removes it from the solution. [H⁺] decreases.

C) When all the H⁺ from the HCl has been neutralized, the KOH starts neutralizing the H⁺ from the HClO₂. According to Le Châtelier's Principle, more HClO₂ will dissociate to replace the decreased H⁺. [HClO₂] decreases.

D) As HClO₂ reacts, it forms ClO₂⁻. \boxed{\rm \textbf{[ClO$_{2}^{-}$] increases}}

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