Answer: It's 18.45
Explanation:
plutonium-236 is an alpha emitter with a half-life of 2.86 years. if a sample initially contains 1.35 mg of pu-236, how long will it take for the sample to decay to 0.100 mg?
Time it will it take for the sample to decay to 0.100 mg is 23.39 years.
The time can be calculated by the formula is given as :
T = (t)^n
t = half life = 2.86 years
n = no. of the half time
no. of half lives sample
1.35 0.67
0.67 0.33
0.33 0.16
T = (t)^n
= ( 2.86 ) ^ 3
= 23.39 years
Thus, plutonium-236 is an alpha emitter with a half-life of 2.86 years. if a sample initially contains 1.35 mg of pu-236, it take for the sample to decay to 0.100 mg is 23.39 years.
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predict the organic product formed when the compound shown below undergoes a reaction with nacn.
the organic product that will result from the interaction of the below-listed chemical with NaCN.
An organic product is developed from components obtained through organic farming. Organic food is the most popular organic product, however, organic agriculture can also be used to produce apparel and personal care products.
To prevent customers from consuming dangerous items, many nations have rigorous consumer safety legislation. These organizations frequently certify agricultural products as organic. The National Organic Program of the USDA certifies products as organic in the US. Several requirements must be completed, according to the USDA, for a product to be deemed organic. Synthetic and non-synthetic compounds that may be used in the production of organic products are included on the National List of Allowed and Prohibited Substances. Operations using these organic goods must be "conserving and protecting natural resources.
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Round 0.02056 to three significant figures. O 0.0205 O 0.0206 O 0.021 O 0.020
On rounding of the number 0.02056 to three significant figures we get 0.021.
The significant figures are the digits that are used to represent the accuracy of a particular number or value.
Rounding off is a procedure in which a complex value is made simple by keeping it close to the very next number which is more convenient to deal with.
In the given number 0.02056. We have to round of this number to 3 significant figures.
We can observe that the digit 6 is greater than 5 so we can add one to the successive digit, so the number will become 0.0206.
But it has to be noted that we have to round of the number to three significant figures.
So, again rounding off the number 6. So finally after rounding of two three significant figures are number becomes 0.021.
As we can see that this number contains three digits after the decimal so it has three significant figures.
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The vapor pressure of 1-propanol is 10.0 torr at 14.7 %C. Calculate the vapor pressure at 52.8 'C_ Given: Heat of vaporization of 1-propanol = 47.2 kJlmol. (Chapter 11)
The pressure that is applied to the walls of a sealed container when a chemical inside of it evaporates is known as vapor pressure in chemistry.
Use the Clausius-Clapeyron equation to get the vapor pressure at a specific temperature:
Propanone's vapour pressure is computed and expressed in degrees Celsius. When the rate of vapor is estimated using propanone at 50°C, the end result is a 78° vapour pressure. As a result, the vapor pressure is 78°.
Calculating pressure involves dividing the force by the area. or pressure force area Text pressure equals force times area, sometimes known as , or pressure equals areaforce.
At 25 °C, the vapor pressure of water is 0.0313 atm, or 23.8 mm of mercury.
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The most common charge associated with scandium in its compounds is $3+.$ Indicate the chemical formulas you would expect for compounds formed between scandium and (a) iodine, ( b) sulfur, (c) nitrogen.
Iodine and scandium have charges of -1 and +3 respectively in their compounds, while sulfur and nitrogen have charges of -2 and -3. Hence ScI3, Sc2S3, and ScN would make up the compound's formula.
The lanthanide iodide scandium triiodide, also known as scandium iodide, is an inorganic chemical having the formula ScI3. As a semiconducting component in epitaxial metal/semiconductor superlattices, the rocksalt-structure semiconductor scandium nitride (ScN) has drawn interest for its possible use in thermoelectric energy conversion devices. With the chemical formula Sc2S3, scandium(III) sulphide is a combination of scandium and sulfur. It's a solid yellow color. Sc3+ and S2 ions from scandium make to the compound Sc2S3. An ionic compound is a thing formed of ions in an ionic connection.
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Which of the following solutions will have higher freezing point depression and why ?
0.1 m NaCl and 0.05 m Al_2(SO_4)_3
O.1M of NaCl solution will have a higher freezing point depression because it contains more particles.
What is freezing point depression?Freezing point depression is the difference in the freezing points of the solution from the pure solvent.
It can be said that for any solute added to a solvent; the freezing point of the solution will be lower than the freezing point of the pure solvent (without the solute).
The freezing point depression due to the presence of a solute is also a colligative property i.e. the amount of change in the freezing point is related to the number of particles of solute in a solution.
Therefore, 0.1M of NaCl solution will have a higher freezing point depression.
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