a.NH4+
b. CuSO4
c. CH4
d. NH3
NH4+
Radicals are molecules or atoms which contain unpaired electrons. the exponent +4 represents 4 electrons in the outer shell which are unpaired
(2) calcium (4) magnesium
Lithium is an element that has chemical properties most similar to sodium.
Out of the given options, lithium is the element that has chemical properties most similar to sodium.
Sodium and lithium are both in Group 1 of the periodic table, also known as the alkali metals. Alkali metals have similar properties because they all have one valence electron, which makes them highly reactive.
For example, like sodium, lithium reacts vigorously with water to produce hydrogen gas and a hydroxide:
2Li(s) + 2H2O(l) → 2LiOH(aq) + H2(g)
#SPJ3
Degrees in Kelvin are always 273 higher than the corresponding celcius degree. Therefore, we just need to add 273 to the celcius degree to find the degree in Kelvin.
-14 + 273 = 259 K
K is the unit of degrees in Kelvin. The answer is 259K.
259 K. took the test
When a gas is confined in a container, it exerts pressure due to the collision of its particles with the walls of the container. This is explained by the kinetic theory of gases, which states that gas particles are in constant random motion. Temperature also plays a role in gas pressure.
When a gas is confined in a container, it exerts pressure due to the collision of its particles with the walls of the container. This is explained by the kinetic theory of gases, which states that gas particles are in constant random motion. The more collisions occur per unit time, the higher the pressure of the gas.
For example, if you squeeze a balloon, the gas inside it gets compressed, and the particles collide with the surface of the balloon more frequently, resulting in an increase in pressure.
Another factor that influences gas pressure is the temperature. According to Charles's Law, when the temperature of a gas increases, its particles move faster, leading to more frequent and energetic collisions with the container walls, thereby increasing the pressure.
#SPJ6
0 100
15 50
30 25
45 12.5
Based on the observations, which of these is most likely David's inference?
A.The half life period of radioactive sodium is 15 hours.
B.The half life period of radioactive sodium is 50 hours.
C.The amount of sodium left in the container after 60 hours will be 10.5 grams.
D.The amount of sodium left in the container after 60 hours will be 1.5 grams.
Answer: A. The half life period of radioactive sodium is 15 hours.
Explanation:
Half life is the time taken by a reactant to reduce to its original concentration. It is designated by the symbol .
Given:
At 0 hours the amount of sodium in container is 100 grams
After 15 hours , the amount of sodium in container is 50 grams which is half of the original amount of 100 grams.
It will take 15 hours for half of a 100 g sample to decay to half of the amount i.e. 50 grams.