The element that contains atoms with an average mass of 1.79 x 10²² grams is Kr (Krypton).
The element that contains atoms with an average mass of 1.79 x 10²² grams is Kr (Krypton).
An element is a chemical substance in which all atoms have the same number of protons. There are around 118 known elements, which are identified by their atomic numbers, which represent the number of protons in their nuclei.
Krypton (Kr) is a chemical element with the atomic number 36. It is a noble gas with a symbol of Kr. Its boiling point is around minus 243 degrees Celsius. The density of krypton is 3.749 grams per cubic centimeter.
Krypton was found by Sir William Ramsay and Morris Travers in 1898, in the residue left over after liquid air had boiled away.
It is an odorless, tasteless, colorless, and non-toxic gas that can be obtained from liquefaction of air. Krypton is often utilized in flash bulbs used in high-speed photography and sometimes in fluorescent lights.
Therefore, the element that contains atoms with an average mass of 1.79 x 10²² grams is Kr (Krypton).
Hence, the correct answer is "Kr".
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How much is 1 ug.min/ml in 1 mg.h/L?
ug/min/ml stands for micrgram per min per millilitre.ug/min/ml is generally used in the field of pharmacokinetics.To generally measure the mean concentration of any drug. These parametres are highly quantitative thus the chances of error is really high.
The units in which pharmacokinetic concepts are represented are a characteristic of the words' definitions and have an impact on the results of numerical calculations.
Consistency in symbol usage would minimise errors that might occur when interpreting values presented for different terms. The specific meaning of a phrase or concept as defined can frequently be clarified by carefully considering the units associated with it.To convert 1 ug/min/ml to mg/h L, the following is the calculation:1 ug/min/ml = 60 ug/h/L1 ug/min/ml = 0.00006 mg/h/L.Thus, 1 ug/min/ml is equal to 0.00006 mg/h/L.
Therefore, the answer is 0.00006.
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If an object weighs 3.4526 g and has a volume of 23.12 mL, what is its density?
Select one:
a. 0.15 g/mL
b. 0.149 g/mL
c. 1.50 x 10^-1 g/mL
d. 0.1493 g/mL
If an object weighs 3.4526 g and has a volume of 23.12 mL, the density of the object will be 0.1493 g/mL.
Density calculationTo calculate the density of an object, you need to divide its mass by its volume. In this case, the mass of the object is 3.4526 g and its volume is 23.12 mL.
Density = Mass / Volume
Density = 3.4526 g / 23.12 mL
Calculating the density:
Density ≈ 0.1493 g/mL
In other words, the density of the object is 0.1493 g/mL.
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What is the wavelength of the light emitted by atomic Hydrogen according to Balmer's formula with m = 3 and n = 8? A) 389nm B)955nm C)384nm D)1950
The wavelength of the light emitted by atomic hydrogen, according to Balmer's formula with m = 3 and n = 8, is approximately 384 nm. So, the correct option is C.
According to Balmer's formula, the wavelength of the light emitted by atomic hydrogen can be calculated using the equation:
1/λ = R(1/m² - 1/n²)
Where λ is the wavelength, R is the Rydberg constant (approximately 1.097 x 10^7 m⁻¹), m is the initial energy level, and n is the final energy level.
In this case, m = 3 and n = 8. Plugging these values into the formula, we have:
1/λ = R(1/3² - 1/8²)
1/λ = R(1/9 - 1/64)
1/λ = R(55/576)
λ = 576/55 * 1/R
Substituting the value of the Rydberg constant, we get:
λ = 576/55 * 1/(1.097 x 10^7)
λ ≈ 3.839 x 10⁻⁷ meters
λ ≈ 384 nm
Therefore, the answer is option C) 384nm.
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