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miss Akunina [59]
3 years ago
7

Question 17 (Multiple Choice Worth 1 points)

Chemistry
1 answer:
Vesnalui [34]3 years ago
6 0
17. not sure
18. not sure
19. movement of rock from one place to another
20. deposition
21. Urbanization
22. sedimentary
23. ease of traffic movement
24. absolute dating
25. fracture
26. increased farm land producing food for people
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A newly discovered element, Z, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267
blsea [12.9K]
atomic mass=percentage of isotope a * mass of  isotope a + percentage of isotope b * mass of  isotope b+...+percentage of isotope n * mass of isotope n.

Data:
mass of isotope₁=267.8 u
percentage of isotope₁=90.3%

mass of isotope₂=270.9 u
percentage of isotope₂=9.7%

Therefore:

atomic mass=(0.903)(267.8 u)+(0.097)(270.9 u)=
=241.8234 u + 26.2773 u≈268.1 u

Answer: the mass atomic of this element would be 268.1 u
7 0
3 years ago
To cook in a dry heat is.<br> 1-Baking<br> 2-Broiling<br> 3-Boiling<br> 4-Sauteing
Degger [83]

Answer:

Baking

Explanation:

4 0
3 years ago
If 11.0 g of ccl3f is enclosed in a 1.1 −l container, will any liquid be present?if so, what mass of liquid?
Anastasy [175]
Considering that CCL3F gas behave like an ideal gas then we can use the Ideal Gas Law 
<span>PV = nRT, however is an approximation and not the only way to resolve this problem with the given data..So,at the end of the solution I am posting some sources for further understanding and a expanded point of view. </span>

<span>Data: P= 856torr, T = 300K, V= 1.1L, R = 62.36 L Torr / KMol </span>

<span>Solving and substituting in the Gas equation for n = PV / RT = (856)(1.1L) /( 62.36)(300) = 0.05 Mol. This RESULT is of any gas. To tie it up to our gas we need to look for its molecular weight:MW of CCL3F = 137.7 gm/mol.  </span>

<span>Then : 0.05x 137.5 = 6.88gm of vapor </span>

<span>If we sustract the vapor weight from the TOTAL weight of liquid we have: 11.5gm - 6.88gm = 4.62 gm of liquid.d</span>
8 0
3 years ago
A scientist places a large beaker containing 325 g of 50degree Celsius water into a microwave. He has to run the microwave for 3
Bingel [31]

The amount of energy absorbed by the 325g of water is 57,057J. Details about calorimetry can be found below.

<h3>How to calculate energy?</h3>

The energy absorbed by a mass of substance can be calculated using the following formula;

Q = mc∆T

Where;

  • Q = quantity of heat absorbed
  • m = mass of substance
  • c = specific heat capacity
  • ∆T = change in temperature

Q = 325g × 4.18 × (92 - 50)

Q = 57,057J

Therefore, the amount of energy absorbed by the 325g of water is 57,057J.

Learn more about energy at: brainly.com/question/3609481

#SPJ1

6 0
2 years ago
What is chemical formula for: Iron (III) fluoride
True [87]

Answer:

FeF3

Explanation:

You have to break this problems down and know the naming rules.

- symbol for iron - Fe

- symbol for fluoride - F

- Add together - FeF

- Now, add the 3

- FeF3

- Hope that helps! Please let me know if you need further explanation.

6 0
3 years ago
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