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andrew11 [14]
3 years ago
11

At standard pressure, how do the boiling point and the freezing point of NaCl(aq) compare to the boiling point and the freezing

point of H2O(l)?
Chemistry
1 answer:
Vanyuwa [196]3 years ago
7 0
I know that they are both lower
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The vapor pressure of ethanol is 400 mmhg at 63.5°c. its molar heat of vaporization is 39.3 kj/mol. what is vapor pressure of et
SVETLANKA909090 [29]

Answer:- The pressure of ethanol would be 109 mmHg.

Solution:- This problem is based on Clausius clapeyron equation--

ln(\frac{P_1}{P_2})=(\frac{\Delta Hvap}{R})(\frac{1}{T_2}-\frac{1}{T_1})

Given, T_1 = 63.5 + 273 = 336.5 K

T_2 = 34.9 + 273 = 307.9 K

P_1 = 400 mmHg

P_2 = ?

\Delta Hvap = 39.3 kJ/mol = 39300 J/mol

R = 8.314 J/mol.K

Let's plug in the values in the equation and do the calculations.

ln(\frac{400}{P_2})=(\frac{39300}{8.314})(\frac{1}{307.9}-\frac{1}{336.5})

ln(\frac{400}{P_2}) = 1.30

On taking anti ln to both sides...

\frac{400}{P_2} = e^1^.^3^0

\frac{400}{P_2} = 3.67

P_2 = 400/3.67

P_2 = 109 mmHg

3 0
3 years ago
if the chromosome number in the sporophyte generation of a plant is 32 what is its number in the gametophyte generation?
xz_007 [3.2K]

Chromosomes have hereditary function that are capable of self-duplication and they have thread-like structures seen inside the nucleus of plant and animal. In plants, they go through a cycle called alteration of generation that has multicellular stages. One is sporophyte that is a diploid, and the other is gametophyte with a haploid.

<span>Moreover, spores are produce through meiosis so it go through a process of chromosome reduction in order to create a haploid spores. While, gametes undergo mitosis and the structure is already a haploid, which means that the number of chromosomes will not change in order to produce haploid. In this case, the plant have both spores and gametes and the similarities is that, they are both singles celled and a haploid. Therefore, the number of the chromosome in the gametophyte generation is also 32.</span>

3 0
3 years ago
What is bedrock layer​
Nuetrik [128]
Bed rock is a layer underneath minerals
6 0
3 years ago
What type of solid consists of positive metal cations surrounded by valence electrons that
statuscvo [17]
I think your answer is C
6 0
3 years ago
Read 2 more answers
Students conducting a lab investigation are given two unknown tubes of colorless aqueous solutions. The students are told that o
iragen [17]

The students can determine which of the solutions contains salt through the conductive tester.

<h3 /><h3>What is an ionic solution?</h3>

It is a solution containing ions are atoms that have gained or lost electrons to acquire a positive (lost electron) or negative (gained electron) charge.

An ionic solution would be able to conduct electricity whereas the covalent would not so if you have a conductivity tester which is available in most labs.

The students can distinguish between the 2 solutions through the conductive tester.

Learn more about the ionic solution here:

brainly.com/question/14275722

#SPJ1

4 0
3 years ago
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