Answer:
0.3 moles of H2 will be produced.
Explanation:
Balanced reaction: 2 Al + 6 HCl → 2 AlCl3 + 3 H2
Given Al mass = 5.4 g, we know Mr of Al is 27
Using the formula:
moles = mass / Mr
moles of Al = 5.4 / 27
moles of Al = 0.2 moles
Here we see that "2" molar mass before Al; so in this reaction, "1" molar mass will have [(0.2)/2] = 0.1 moles. He see "3" molar mass before H2, therefore moles of H2 is (3 * 0.1) = 0.3 moles.
Answer:
D.) store water, waste, and nutrients for the cell.
Explanation:
D is your answer because the vacuole is like a closet for the cell. It can store anything the cell may use later or it can store waste that is to be taken out of the cell at a later time as to not contaminate the rest of the organelles. In plant cells, it can also help with support since it is so big.
4.0 % in mass per volume :
4.0 g ---------- 100 mL
1.2 g ---------- ( volume )
Volume = 1.2 x 100 / 4.0
Volume = 120 / 4.0
= 30 mL
hope this helps!
Explanation:
While CO2 can be distilled from the air, that method is expensive and inefficient. Therefore, it is usually captured from other sources where it is a waste material. This could be anything from brewing beer to burning fossil fuels. However, the most efficient way of producing carbon dioxide is from ammonia.
Answer:
1. Exothermic
2.Current electricity
3. Static electricity
4. Outer ear
5. Compression
Explanation:
1. Reaction that releases heat.
Exothermic
2. Flow of electrons through a material toward a positive charge.
Current electricity
3. Build up of electrons in a material.
Static electricity
4. Part of the ear is responsible for capturing sound waves.
Outer ear
5. Part of the sound wave where the molecules are pressed closely together.
Compression