Under what circumstances may a health insurer charge a higher premium to a woman with a genetic disposition to breast cancer? a) Her mother has breast cancer but she doesn't. b) She has breast cancer. c) Her sister has breast cancer but she doesn't. d) Health insurers can never discriminate based on genetic information in this way.
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Which of the following forces causes comets to regularly return to the inner solar system after being gone for many years?A. frictionB. magnetismC. electromagnetic forceD. gravity
In a constantvolume bomb calorimeter, the combustion of 0.6654 gof an organiccompound with a molecular mass of 46.07 amu causesthe temperaturein the calorimeter to rise from 25.000oC to 30.589oC. The total heat capacity ofthe calorimeter and allits contents is 3576 JoC-1. What isthe energy of combustion ofthe organic compound,DU/ kJmol-1?
If a large marshmallow has a volume of 2.75 in3 and density of 0.242 g/cm3, how much would it weigh in grams? 1 in3=16.39 cm3.
The diameter of an atom is approximately 1 * 10 ^ - 10 * m . What is the diameter in decimeters?
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Answer:
1. The empirical formula is C₄H₅N₂O
2. The molecular formula is C₈H₁₀N₄O₂
Explanation:
The following data were obtained from the question:
Mass of compound = 200 g
Carbon (C) = 98.061 g
Hydrogen (H) = 10.381 g
Oxygen (O) = 32.956 g
Empirical formula =?
Molecular formula =?
Next, we shall determine the mass of nitrogen in the compound. This can be obtained as follow:
Nitrogen (N) = 200 – (98.061 + 10.381 + 32.956)
Nitrogen (N) = 200 – 141.398
Nitrogen (N) = 58.602 g
1. Determination of the empirical formula of the compound.
C = 98.061 g
H = 10.381 g
O = 32.956 g
N = 58.602 g
Divide by their molar masses
C = 98.061 /12 = 8.172
H = 10.381 /1 = 10.381
O = 32.956 /16 = 2.060
N = 58.602 /14 = 4.186
Divide by the smallest
C = 8.172 /2.060 = 4
H = 10.381 / 2.060 = 5
O = 2.060 / 2.060 = 1
N = 4.186 / 2.060 = 2
Thus, the empirical formula of the compound is C₄H₅N₂O
2. Determination of the molecular formula of the compound.
Empirical formula of the compound => C₄H₅N₂O
Molar mass of compound = 194.101 g/mol
Molecular formula =.?
[C₄H₅N₂O]n = 194.101
[(12×4) + (1×5) + (14×2) + 16]n = 194.101
[48 + 5 + 28 + 16]n = 194.101
97n = 194.101
Divide both side by 97
n = 194.101 /97
n = 2
Molecular formula => [C₄H₅N₂O]n
=> [C₄H₅N₂O]2
=> C₈H₁₀N₄O₂
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Answer:
0.1775 M
Explanation:
The reaction that takes place is:
- HA + NaOH → NaA + H₂O
Where HA is the unknown weak acid.
At the equivalence point all HA moles are converted by NaOH. First we calculate how many NaOH moles reacted, using the given concentration and volume:
- 0.0500 M NaOH * 14.2 mL = 0.71 mmol NaOH
That means that in 4.00 mL of the weak acid solution, there were 0.71 weak acid mmoles. With that in mind we can now calculate the concentration:
- 0.71 mmol HA / 4.00 mL = 0.1775 M
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Injecting or smoking cocaine produces a quicker strong high than snorting it.
Cocaine is a powerfully addictive stimulant drug crafted from the leaves of the coca plant local to South the us. despite the fact that healthcare companies can use it for legitimate medical functions, including neighborhood anesthesia for a few surgical procedures, leisure cocaine use is unlawful. As a street drug, cocaine looks as if a best, white, crystal powder. road sellers regularly blend it with things like cornstarch, talcum powder, or flour to growth earnings. they will also blend it with other tablets including the stimulant amphetamine, or synthetic opioids, along with fentanyl. adding synthetic opioids to cocaine is specifically risky whilst humans using cocaine don’t recognize it carries this dangerous additive. increasing numbers of overdose deaths among cocaine users might be related to this tampered cocaine.
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Answer: The daughter nuclei is
Explanation:
Electron capture is defined as the process in which an electron is drawn to the nucleus where it combines with a proton to form a neutron and a neutrino particle.
The chemical equation for the reaction of electron capture of Zinc-63 nucleus follows:
The parent nuclei in the above reaction is Zinc-63 and the daughter nuclei produced in the above reaction is copper-63 nucleus.
Hence, the daughter nuclei is
Final answer:
When Zinc-63 undergoes electron capture, it results in the creation of a Copper-63 daughter nucleus. This is due to the atomic number decreasing by one (from 30 to 29) during electron capture, but the mass number remaining unchanged.
Explanation:
Electron capture is a process where a proton-rich nucleus absorbs an inner shell electron, which results in a conversion of a proton into a neutron, and the emission of an electron neutrino. In doing so, the atomic number decreases by one, while the mass number stays the same. Therefore, in the case of 63 Zn (zinc-63), the atomic number is 30 prior to electron capture. After electron capture, the atomic number will decrease by one to become 29, leading to the production of 63 Cu (copper-63).
Remember that the atomic number (bottom number), also known as the proton number, determines the element. Therefore, in our example, Zn changes to Cu. The fact that the mass number (top number) remains the same is due to the total number of protons and neutrons (nucleons) being conserved.
Learn more about Electron Capture here:
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Explanation:
Colloidal solutions, or colloidal suspensions, are nothing but a mixture in which the substances are regularly suspended in a fluid. ... Colloidal systems can occur in any of the three key states of matter gas, liquid or solid. However, a colloidal solution usually refers to a liquid concoction.
Answer:
Colloidal solutions, or colloidal suspensions, are nothing but a mixture in which the substances are regularly suspended in a fluid.