1) 513.4 m to cm
Chemistry
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The relationship between the "absolute temperature" on the Kelvin scale and the Celsius temperature is given bv: T(K) = t(°C) + 273.15 t(°C) = T(K) + 273.15 T(K) = 5/8[4°C)] - 32 D) T(K) = 8/5[t(°C)] + 32
B. Solids are high in density and compressible.
C. Solids are low in density and incompressible.
D. Solids are high in density and incompressible.
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Answer: Option (D) is the correct answer.
Explanation:
Solids are the substances whose molecules are closely packed together due strong inter molecular forces between them. This causes the solid to have a fixed shape and volume.
Whereas density is mass divided by per unit volume.
Mathematically, Density =
Since, density is proportional to mass. So, more is the mass that is, more is the number of molecules held together by strong forces more will be its density.
Therefore, we can conclude that the statement solids are high in density and incompressible, best describes solids.
Multiple answers could be chosen, just due to the fact that a solid is nothing more than just an object that cannot change it's physical shape into an object; just as water would. a solid can have a low density; such as paper, plastics, or even just a piece of wood.
But think of a block of ice. You can break it, and crush it. It cannot be formed into any other shape. If you did break it, it only would make more ice fragments. And it's next phase is a liquid; if it were to be melted.
B. Pandemic
C. Epidemiology
D. Toxicology
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The answer is A
The bacteria that cause disease are known as pathogens. The term pathogen is used to refer to all types of disease causing microorganisms. These include bacteria, fungi, protozoa and fungi.
Bacteria. Microscopic organisms that come in many shapes and sizes. Some bacteria that cause disease in man are Salmonella typhi which causes typhoid and Streptococcus pyogens which causes sore throat.
Virus. A virus is a microscopic entity much smaller than even bacteria and can only exist inside a host such as a cell. It cannot live on its own. Some viruses that cause disease are HIV which causes AIDS and Rhino virus which causes colds.
Fungi. These are a group of unicellular or multicellular microscopic organisms that live by feeding on organic matter. A type of fungus that causes disease is Trichophyton mentagrophyte which is responsible for athlete's foot.
Protozoa. A group of one celled organisms which live in water. Entamoeba histolytica is a protozoa, an amoeba which causes amoebic dysentery in man.
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Answer:
The H2O sample has the greatest number of atoms. 1.41 moles, or (1.041 moles)*(5.023x10^23) atoms
Explanation:
We need to convert each value into moles, a count of the number of atoms/molecules.
a) 1.0 moles He
b) 0.60 moles H2
c) 20 grams K: convert to moles with the molar mass of K
(20 grams K)/(39.1 g/mole K) = 0.511 moles K
d) 8.5 mL H2O (density of H2O = 1 g/mL).
Find the mass of the H2): (8.5 ml)*(1 g/ml) = 8.5 grams H2)
Now calculate moles H2): (8.5 grams)/(18 grams/mole) = 0.473 moles H2O
e) 22.6 g KMnO4
(22.6 g KMnO4 )*(158.0 g/mole) = 0.143 moles
Now we need to take into account the number of atoms per molecule:
Molecule Atoms/Molecule Moles Atoms(moles)
He 1 1.0 1.0
H2 2 0.60 1.2
K 1 0.51 0.51
H2O 3 0.47 1.41
KMnO4 6 0.143 0.86
The H2O sample has the greatest number of atoms. 1.41 moles, or (1.041 moles)*(5.023x10^23) atoms
(2) 2 (4) 4
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Answer:
The patient requires a dose of 107.2 mg of gentamicin
Explanation:
A dosage of 1.75 mg per Kilogram body weight results in blood serum levels of 4.5 mcg/mL
This means that; 1.75 mg/ kg = 4.0 mcg/mL
Therefore, dosage of gentamicin in mg/kg that will result in 4.5 mcg/mL blood serum level = (1.75 mg/Kg * 4.5 mcg/mL) / 4.0 mcg/mL
Dosageof gentamicin = 1.97 mg/Kg
1-lb = 0.453592 Kg
Weight of 120-lb patient in Kg = 120 * 0.453592 = 54.43 Kg
Dose in mg required by patient = 1.97 mg/Kg * 54.43 Kg = 107.2 mg
Therefore, the 120-lb patient requires a dose of 107.2 mg of gentamicin to result in a blood serum level of 4.5 mcg/mL