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matrenka [14]
2 years ago
15

What is the average atomic mass (in amu) of element m

Chemistry
1 answer:
Leona [35]2 years ago
8 0

Answer:

the mass is m ' a so yes a and m

Explanation: first off ' m

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Select the correct answer.
GREYUIT [131]

Answer:HNO3 + NaOH → H2O + NaNO3

Explanation:

8 0
3 years ago
As a "rule of thumb" there are 20 drops of a liquid in a mL. Using this estimate and a density of 1.685, how many moles are in 2
arlik [135]

Answer:

0.020 mol

Explanation:

Let's consider the following relations:

  • 20 drops of a liquid have a volume of 1 mL.
  • The density of the solution is 1.685 g/mL, that is, each milliliter of solution has a mass of 1.685 g of solution.
  • There are 85 g of phosphoric acid per 100 grams of solution (85 % by weight).
  • The molar mass of phosphoric acid is 97.99 g/mol

With these relations, we can calculate the moles of phosphoric acid in 27 drops of solution.

27drop \times \frac{1mL}{20drop} \times \frac{1.685gSolution}{1mL} \times \frac{85gH_3PO_4}{100gSolution} \times \frac{1molH_3PO_4}{97.99gH_3PO_4} = 0.020 mol

4 0
2 years ago
g Tibet (altitude above sea level is 29,028 ft) has an atmospheric pressure of 240. mm Hg. Calculate the boiling point of water
Marina CMI [18]

<u>Answer:</u> The boiling point of water in Tibet is 69.9°C

<u>Explanation:</u>

To calculate the boiling point of water in Tibet, we use the Clausius-Clayperon equation, which is:

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

where,

P_1 = initial pressure which is the pressure at normal boiling point = 1 atm = 760 mmHg      (Conversion factor:  1 atm = 760 mmHg)

P_2 = final pressure = 240. mmHg

\Delta H_{vap} = Heat of vaporization = 40.7 kJ/mol = 40700 J/mol     (Conversion factor: 1 kJ = 1000 J)

R = Gas constant = 8.314 J/mol K

T_1 = initial temperature or normal boiling point of water = 100^oC=[100+273]K=373K

T_2 = final temperature = ?

Putting values in above equation, we get:

\ln(\frac{240}{760})=\frac{40700J/mol}{8.314J/mol.K}[\frac{1}{373}-\frac{1}{T_2}]\\\\-1.153=4895.36[\frac{T_2-373}{373T_2}]\\\\T_2=342.9K

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

T(K)=T(^oC)+273

342.9=T(^oC)+273\\T(^oC)=(342.9-273)=69.9^oC

Hence, the boiling point of water in Tibet is 69.9°C

3 0
3 years ago
Could a mixture be made up of only elements and no compounds? Explain?
Delicious77 [7]
Yes cause elements never undergo a chemical interaction and stay
7 0
3 years ago
Draw the structural formula for the chlorate ion, ClO3-1 and state the type of bonds in a chlorate ion.
gregori [183]

Answer:

2 double bonds and 1 single bond

Explanation:

The structural formular of the chlorate ion is given in the attached image.

The bonds present are;

- A single bond between Cl and O

- Two double bonds between Cl and O

6 0
2 years ago
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