Answer:
B) Polonium and Arsenic
Explanation:
Metalloids are a small category of elements that are right between metals and non-metals, and have properties from those categories.
The most recognized are: Boron, Silicon, Germanium, Arsenic, Antimony, and Tellurium.
Some that are irregularly recognized are Polonium and Astatine.
The only option with the elements in either of the shown elements is B) Polonium and Arsenic.
Halogens I'm pretty sure. The next to last group on the right of the periodic table.
The level in the beaker will increase because the volumes of the spheres will also be added to the volume of the water. First, we must determine the volume of each sphere. For this, we will use:
density = mass / volume
We can check the density of both aluminum and iron in literature, and given the mass, we may obtain the volume.
Aluminum:
Density = 2.70 g/ml
Mass = 20.4 g
Volume = 20.4 / 2.7 = 7.56 ml
Iron:
Density = 7.87 g/ml
Mass = 49.4 g
Volume = 49.4 / 7.87 = 6.28 ml
Now, we add these volumes to the volume of water present:
75.2 + 6.28 + 7.56 = 89.04
The new level will be 89.0 ml
Answer:
? the question isn't clear
Explanation:
The given condition is STP, under this condition, gas has a rule of 22.4 L per mole. And the given equation is already balanced. The ratio of mole number is the same as the ratio of the volume and is also the same as the ratio of coefficients. So the answer is 4.0 liters.
