The rate of effusion of gas B is 728.32 m/s
<u>Explanation:</u>
Given:
Mass of A, m₁ = 46 g/mol
Rate of effusion of A, R₁ = 515 m/s
Mass of B, m₂ = 92 g/mol
Rate of effusion of B, R₂ = ?
We know:
Substituting the value we get:
Therefore, the rate of effusion of gas B is 728.32 m/s
The correct match is as follows:
Pressure and heat - Metamorphic rock
Cooling magma - The Intrusive igneous rock
Cooling lava - The Extrusive igneous rock
Erosion and Deposition - Sedimentary rock
This is because Metamorphic rocks are formed as a result of past existing rocks changing form. If the igneous and sedimentary rocks are exposed to high temperature and pressure, they then become metamorphic rocks.
Intrusive igneous rocks form when magma cools slowly. This process soon results in the formation of large-crystal like structures. Whereas, when exposed to the atmosphere lava cools rather quickly. This faster cooling process forms extrusive igneous rocks. The fast cooling lava creates smaller crystals and a smoother surface.
The sediments that are formed as a result of weathered rocks are usually deposited on the surface of Earth, or at the bottom of rivers and oceans. Over time, sediments collect and form layers over the most recent layer. This leads to the formation of sedimentary rocks.
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i’m pretty sure the answer is C
Answer:
1. Animal cells are eukaryotic
2. All live things are made up of cells (I think)
3. Cells are the basic unit of all living things
Explanation:
Number 2 is probably wrong because I can't see the diagram but, all living things ARE actually made up of cells
a) m(H₂C₂O₄) = 15.5 g.
n(H₂C₂O₄) = m(H₂C₂O₄) ÷ M(H₂C₂O₄).
n(H₂C₂O₄) = 15.5 g ÷ 90 g/mol.
n(H₂C₂O₄) = 0.172 mol; amount of substance.
N(H₂C₂O₄) = n(H₂C₂O₄) · Na (Avogadro constant).
N(H₂C₂O₄) = 0.172 mol · 6.022·10²³ 1/mol.
N(H₂C₂O₄) = 1.037·10²³; number of molecules.
b) In one molecule of oxalic acid there are two atoms of carbon:
N(C) = 2 · N(H₂C₂O₄).
N(C) = 2 · 1.037·10²³.
N(C) = 2.074·10²³; number of carbon atoms.