The answer is compound. This a substance shaped when chemical elements (two or more) are chemically joined together. The kind of bonds holding elements in a compound can differ: there are two common kinds namely covalent bonds and ionic bonds. The elements in at all compound are continuously existing in fixed ratios.
The conservation of mass states that the total mass of reactants present before the reaction occurs is equal to the total mass of products after the reaction. From the choices, the second choice deems fit for the description of the law.
Amino acids join end to end to form proteins since they are monomers.
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The answer is: C. A failed constitutional amendment.
The Equal Rights Amendment (ERA) is a proposed amendment to the United States Constitution.
This amedment is designed to guarantee equal legal rights for all American citizens regardless of sex.
Hawaii was the first state to ratify ERA, followed by approximately 30 other states.
During the mid-1970s, a conservative women in opposition eroded support for the Equal Rights Amendment and amadment failed to achieve ratification.
Answer: The correct option is (c). The total pressure doubles.
Solution:
Initially, only 4 moles of oxygen gas were present in the flask.
(
) ( according to Dalton's law of partial pressure)
....(1)
= Total pressure when only oxygen gas was present.
Final total pressure when 4 moles of helium gas were added:
partial pressure of oxygen in the mixture :
Since, the number of moles of oxygen remains the same, the partial pressure of oxygen will also remain the same in the mixture.
= Total pressure of the mixture.
from (1)
On rearranging, we get:
The new total pressure will be twice of initial total pressure.
