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Alex_Xolod [135]
3 years ago
6

How does density differ from volume

Chemistry
2 answers:
dybincka [34]3 years ago
8 0

Density, however, is the mass of an object divided by its volume. ... This means that the lead has a higher density than cotton. To summarize, volume and density measure two different things. Volume measures how big the space of something is, whereas density measures the how much mass there is in this space (volume).

natta225 [31]3 years ago
6 0

Density: Degree of consistency measured by the quantity of mass per unit volume.

Volume: Amount of space something takes up.

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At a certain temperature the rate of this reaction is first order in HI with a rate constant of :0.0632s2HIg=H2g+I2g Suppose a v
olya-2409 [2.1K]

Answer:

\boxed{\text{28.0 s}}

Explanation:

Whenever a question asks you, "How long does it take to reach a certain concentration?" or something like that, you must use the appropriate integrated rate law expression.

The integrated rate law for a first-order reaction is  

\ln \left (\dfrac{[A]_{0}}{[A]} \right ) = kt

Data:

[A]₀ = 1.28 mol·L⁻¹

[A] = 0.17 [A]₀

  k = 0.0632 s⁻¹

Calculation:

\begin{array}{rcl}\ln \left (\dfrac{[A]_{0}}{0.170[A]_{0}} \right ) & = & 0.0632t\\\\\ln \left (5.882) & = & 0.0632t\\1.772 & = & 0.0632t\\\\t & = & \dfrac{1.772}{0.0632}\\\\t & = & \textbf{{28.0 s}}\\\end{array}\\\text{It will take } \boxed{\textbf{28.0 s}} \text{ for [HI] to decrease to 17.0 \% of its original value.}

8 0
3 years ago
Choose the correct total number of electron domains (bonding and nonbonding) about a central atom if the angle(s) between the el
slamgirl [31]

Answer:

The central atom has 3 electron domains.

Explanation:

According to the Valence Shell electron pair repulsion theory (VSEPR) put forward by Gillespie and Nyholm in 1957, the shape of a molecule is determined by repulsion between all the electron pairs (electron domains) present in the valence shell.

The electron pairs or electron domains are known to position themselves as far apart in space as possible in order to minimize repulsions.

Hence, when the central atom of a molecule contains three electron domains, they are positioned at an angle of 120° from each other to minimize repulsions. Hence the answer.

5 0
4 years ago
The Gibbs free energy change of a reaction can be calculated using the equation ΔG = ΔH – TΔS. A biochemical reaction that can p
scoundrel [369]

Answer:

the correct option is c

Explanation:

Biological chemical reactions that provide energy are considered spontaneous, therefore the deltaG value would be negative.

5 0
4 years ago
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horrorfan [7]

Answer:

I think it's a old river

Explanation:

4 0
3 years ago
A
Ksivusya [100]

Answer:

AYAYYA

Explanation:

YEA

4 0
3 years ago
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