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finlep [7]
4 years ago
14

galium has a weighted average atomic mass of 69.7 and two naturally occurring isotopes: Gallium-69 and Gallium-71. Gallium-69 ha

s a relative abundance of 60.1% and a mass of 68.9. The relative abundance of gallium-71 is 39.9%. Based on the information, what is the mass of gallium-71?
Chemistry
1 answer:
dimulka [17.4K]4 years ago
6 0
Figure it out yet????
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What is the object called that burns as it enters the atmosphere and causes an shooting star?
nataly862011 [7]

Answer:

A meteor is an asteroid or other object that burns and vaporizes upon entry into the Earth's atmosphere; meteors are commonly known as "shooting stars." If a meteor survives the plunge through the atmosphere and lands on the surface, it's known as a meteorite.

Explanation:

7 0
3 years ago
How many grams of NaCl are required to make 150.0mL of a 5.000 m solution
Yanka [14]

The  number of  grams of NaCl  required  to make 150.0 ml of a 5.000m solution  is  43.875  grams


<u><em>calculation</em></u>

Step 1:  calculate  moles of NaCl

moles=  molarity x  volume in liters

volume in liters =  150.0  ml/1000= 0.15  l

moles is=  5.000mol/l  x0.15  l  =0.75  moles


Step2 :  find  mass

mass=  moles  x molar  mass

molar mass  of NaCl= 23 +35.5 = 58.5  g/mol

mass= 0.75  moles x58.5 g/mol = 43.875 grams

6 0
4 years ago
I need help with this
lys-0071 [83]

Answer:

Fossils are the some traces or portions of the animals or plants, buried and preserved from past in rocks, sediments or ice.

Explanation:

                                  Correct match  is as follows-

  1. Mold and cast fossils-  An organism is buried in sediment after it dies.The hard part of organism leave behind a empty space imprinted in the rock. Later sediments and minerals fill the space and harden to make the original copy of the organisms.
  2. Carbon film fossils- An organism buried in sediments gets squeezed and heated inside the earth , leaving behind a thin carbon outline of the organism on a rock.
  3. Amber fossil-  An organism covered in tree resin or tree sap , which then hardens with the body of the organisms preserved inside.
  4. Ice fossil- An organism dies in a cold place on earth , its body becomes frozen and covered in layers of ice . The hard and soft part of the body may be preserved.

3 0
3 years ago
When a stable diatomic molecule spontaneously forms from its atoms, what are the signs of δh°, δs°, and δg°?
tino4ka555 [31]
I think it’s stable to the point of the molecule but not sure
6 0
3 years ago
Efforts to restore wetlands and forests along the coast will most likely _______.
Nataly [62]

The question is incomplete, the complete question is;

Efforts to restore wetlands and forests along the coast will most likely _______. a. benefit the economy by providing jobs b. improve wildlife populations c. reduce soil erosion and flooding in coastal areas d. all of the above

Answer:

ALL OF THE ABOVE.

Explanation:

If wetlands and forests are restored, timber workers will be in business and farmers who cultivate crops on wetlands will have jobs. Thus restoring forests and wetlands could create new jobs.

Also, with the restoration of forests, wild life population will improve because their habitat has been restored. Similarly, the forest trees will contribute to curbing menaces caused by erosion and flooding in coastal areas since trees naturally reduces the speed of surface runoff and wind.

7 0
3 years ago
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