The correct option is C.
Isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. Isotopes have different relative atomic mass but share the same chemical properties.
Pressure and volume are inversely proportional.
When one increases the other decreases and vice versa.
If you think about it, what have you done by squeezing the balloon to a smaller volume? you have brought all the atoms closer, thus they are more likely to collide and have less space to move around.
What is pressure? well, pressure is just the force that atoms apply on the walls of the container(in this example , the container is the balloon)
So by decreasing the volume, you have increased the pressure.
By halving the volume, you double the pressure.
OPTION D
Answer:
Livermorium is a radioactive, artificially produced element about which little is known. It is expected to be a solid and classified as a metal. It is a member of the chalcogen group. Livermorium has four isotopes with known half-lives, all of which decay through alpha decay
Answer:
54.075KJ
Explanation:
Since methane is the limiting reactant.
From the reaction equation,
16 g of methane absorbs 206 KJ of energy
4.20 g of methane will absorb 4.20 × 206/16 = 54.075KJ of energy was absorbed.
From the equation, the value of the enthalpy of reaction is positive, this means that energy is absorbed in the reaction of methane and water. Hence the answer.
The ability of sodium sulfate to act as an antidote to barium chloride poisoning is because displaces barium in barium chloride to form sodium chloride and insoluble harmless barium sulfate.
<h3>Why is a solution of sodium sulfate used as an antidote?</h3>
The ability of sodium sulfate to act as an antidote to barium chloride poisoning is because of the reactivity of sodium.
Sodium is a more reactive metal than barium, so it displaces barium in barium chloride to form sodium chloride and insoluble harmless barium sulfate.
The equation of the reaction is given below:
- BaCl2 + Na2SO4 ----> BaSO4 + NaCl
Therefore, the ability of sodium sulfate to act as an antidote to barium chloride poisoning is because displaces barium in barium chloride to form sodium chloride and insoluble harmless barium sulfate.
Learn more about about reactivity of metals at: brainly.com/question/24866635