The answer is (4), (3) is merely a change in composition, thus not chemical but physical.
Answer: (4). Option 4 seems to be the one undergoing a chemical change because there is a formation gas from the bubbling that occurs. Chemical change is the change that results to the formation of a new substance. The other options given are examples of physical change.
Answer:
Metals are good conductors of electricity. silver is found in in pure form from the earth. so In the given options all are metals. Among them silver is the best conductor of electricity after second best conductor of electricity is gold.
Explanation:
Answer:
there are 12 neutrons in one atom of magnesium.
Answer:
Ionic or Electrovalent Bond.
Explanation:
its ionic bond because the Halogen atom (F) is getting bigger with electrons. This increases the size of the dipoles which cause van der waals dispersion forces. Hence resulting to increase in the strenght of the bond.
Answer:
4046atm
Explanation:
For this question you can use the ideal gas law,
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Where P is pressure, V is volume, n is moles of substance, R is the constant, and T is the temperature.
Because of the units given, R will equal .08026
<h3>Rearrange the equation to solve for pressure:</h3>
Then, plug in the values (I'll be excluding units for simplicity, but they all cancel out for pressure in atm):
This will give you:
