It should be 24 electrons
1: What is the smallest part of a compound called?
mixture
element
atom
molecule
2: One molecule is made of two or more _____ bonded together.
nuclei
mixtures
atoms
compounds
3: Which of the following is a pure substance that can't be separated by physical means, and can't be decomposed into other substances by chemical means?
compound
molecule
mixture
element
4: A substance that cannot be separated physically is called a substance
heterogenous mixture
homogenous mixture
pure substance
mixed substance
5: Which term below represents a pure substance that can be separated chemically, but cannot be separated physically, that is made up of two or more different atoms?
mixture
element
molecule
chemical bond
6: Water is formed when two hydrogen atoms bond to an oxygen atom.
True
The hydrogen and the oxygen in this example are different __True_____________.
Find moles of MgCl first by dividing by the molar mass.
21.9 g / 95.211 g/mol = 0.230 mol MgCl
Then divide by L of water to get the molarity.
0.230 mol / 0.750 L = 0.307 M MgCl
Answer:
Carbon dioxide is moving out of the living things.
Explanation:
The food materials eaten by living things contain carbon in the form of complex organic matter. When living things feed, they ingest this complex organic material into their bodies.
During the process of digestion, this complex organic material is broken down to give glucose. Glucose is the energy molecule in living things. Excess glucose in the body is stored as glycogen.
During cellular respiration, glucose is broken down to release carbon dioxide. Hence, at night when the giraffe has stopped eating, cellular respiration continues to occur and carbon dioxide is released, that is, carbon dioxide continues to move out of living things at night.
Answer:
The concentration of the acid is 117.92 ± 0.03 mM.
Explanation:
In this problem, the concentration of NaOH and the volume used is given. The volume pipetted from the acid is also given. The concentration of the acid is given by:
CNaOH * VNaOH = Cacid * Vacid
158.32 * (18.76-0.14) = C acid * 25
C acid = 117.92 mM
The propagation of error for this problem, which is a multiplication is the concentration of the acid multiplied by the error divided by its respective value as shown in the equation below
error = 117.92 * 
The answer is 0.03 mM of uncertainty.
