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garri49 [273]
3 years ago
5

(02.02 MC)

Chemistry
1 answer:
vova2212 [387]3 years ago
8 0

Answer:

Mechanical weathering will cause wearing down of rocks.

Explanation:

All the other choices aren't suitable for a dry climate where sand storms occur.

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What did timbuktu contributed to mali's important as a kingdom
Alex73 [517]
Timbuktu was considered a MASSIVE trade center in Mali. That is how all of the foreign goods came into the kingdom. It also had education centers which was very important in Mali.
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3 years ago
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Absorption of a light wave causes atoms and molecules to vibrate. These vibrations create ________ energy.
dedylja [7]
To create kenetic energy
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3 years ago
The vapor pressure of the liquid NH3 is measured at different temperatures. The following vapor pressure data are obtained.
S_A_V [24]

Answer:

\Delta \:H_{vap}=23.3054\ kJ/mol

Explanation:

The expression for Clausius-Clapeyron Equation is shown below as:

\ln P = \dfrac{-\Delta{H_{vap}}}{RT} + c

Where,  

P is the vapor pressure

ΔHvap  is the Enthalpy of Vaporization

R is the gas constant (8.314×10⁻³ kJ /mol K)

c is the constant.

For two situations and phases, the equation becomes:

\ln \left( \dfrac{P_1}{P_2} \right) = \dfrac{\Delta H_{vap}}{R} \left( \dfrac{1}{T_2}- \dfrac{1}{T_1} \right)

Given:

P_1 = 234.2 mmHg

P_2 = 522.6 mmHg

T_1 = 217.9 K

T_2 = 232.4 K

So,  

\ln \:\left(\:\frac{234.2\ mmHg}{522.6\ mmHg}\right)\:=\:\frac{\Delta \:H_{vap}}{8.314\times 10^{-3}\ kJ /mol K}\:\left(\:\frac{1}{232.4\ K}-\:\frac{1}{217.9\ K}\:\right)

\Delta \:H_{vap}=\frac{\left\{\ln \left(\:\frac{234.2}{522.6}\right)\:\times \:8.314\times 10^{-3}\right\}}{\left(\:\frac{1}{232.4}-\:\frac{1}{217.9}\:\right)}\ kJ/mol

\Delta \:H_{vap}=-\frac{10^{-3}\times \:8.314\ln \left(\frac{234.2}{522.6}\right)}{\frac{14.5}{50639.96}}\ kJ/mol

\Delta \:H_{vap}=-\frac{421020.62744\ln \left(\frac{234.2}{522.6}\right)}{14500}\ kJ/mol

\Delta \:H_{vap}=23.3054\ kJ/mol

7 0
3 years ago
When drying fruit you dip the fruit in a syrup solution, you are putting the fruit cells in what type of solution?
tamaranim1 [39]

Answer:

The correct answer is A: Hypertonic solution

Explanation:

Syrup is a solution with a <u>high concentration of sugar</u>. When you put the fruit in this solution, the syrup concentration is higher than the sugar concentration inside the fruit, this is called an <u>hypertonic solution</u>. Consequently, there is a gradient of concentration between the interior of fruit cells and the exterior. The water will go out from the cells towards the exterior, in favor of the concentration gradient. In this way, you are removing water from inside the fruit (drying).

7 0
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Write a complete step-by-step plan for dealing with broken glassware on the floor or lab table. Write your plan in list form in
zzz [600]
1 tell the person in charge or the teacher
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4 get broom or brush weep area and get small pieces depose in same place
5 take a wet wipe and cover area to pick up anything that as missed!

3 0
4 years ago
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