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3 years ago

Is tantalum radioactive?

1 answer:

7 0

There are certain processes in nature that produce many of these radioactiveisotopes. For instance, some radioactive nitrogen is produced in the atmosphere when high energy cosmic radiation from the sun hits the earth. Other radioactiveisotopes are only available by artificial production. good luck

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A 20.0 L gas cylinder has been filled with 4.00 moles of gas. You measure the pressure to be 4.20 atm . What is the temperature

Over [174]

Answer:

256 K

Explanation:

Given data

Volume (V): 20.0 L

Moles (n): 4.00 mol

Pressure (P): 4.20 atm

Ideal gas constant (R): 0.0821 atm.L/mol.K

Temperature (T): ?

We can determine the temperature of the gas using the ideal gas equation.

P × V = n × R × T

T = P × V / n × R

T = 4.20 atm × 20.0 L / 4.00 mol × 0.0821 atm.L/mol.K

T = 256 K

4 0

3 years ago

What particles are used for artificial transmutations?

Doss [256]

Answer:

Explanation:

6 0

4 years ago

Read 2 more answers

What is the mass of silver (107.87 g/mol) produced by the reaction of 3.00 moles of copper with 3.00 moles of silver nitrate?Cu

vladimir2022 [97]

Answer: 323.61 g of $Ag$ will be produced

Explanation:

The given balanced chemical reaction is :

$Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag$

According to stoichiometry :

2 moles of $AgNO_3$ require 1 mole of $Cu$

Thus 3.00 moles of $AgNO_3$ will require= $\frac{1}{2}\times 3.00=1.50moles$ of $Cu$

Thus $AgNO_3$ is the limiting reagent as it limits the formation of product.

As 2 moles of $AgNO_3$ give = 2 moles of $Ag$

Thus 3.00 moles of $AgNO_3$ give = $\frac{2}{2}\times 3.00=3.00moles$ of $Ag$

Mass of $Ag=moles\times {\text {Molar mass}}=3.00moles\times 107.87g/mol=323.61g$

Thus 323.61 g of $Ag$ will be produced from the given moles of both reactants.

3 0

3 years ago

Which of the following is made from a material that is an electric conductor? Answer 5

aliya0001 [1]

A. An aluminum can because its metal.

5 0

3 years ago

Read 2 more answers

A solution contains 5.25 g of urea, CO(NH2)2 (a nonvolatile solute) and 0.100 kg of water. If the vapor pressure of pure water a

babymother [125]

Answer:

The vapor pressure of the solution is 23.3 torr

Explanation:

Step 1: Data given

Mass of urea = 5.25 grams

Mass of water = 0.100 kg = 100 grams

Temperature = 25.0 °C

Vapor pressure of water = 23.7 torr

Step 2: Calculate moles of water

Moles H2O = mass H2O / molar mass H2O

Moles H2O = 100 grams / 18.02 g/mol

Moles H2O = 5.55 moles

Step 3: Calculate moles of urea

Moles urea = 5.25 grams / 60.06 g/mol

Moles urea = 0.0874 moles

Step 4: Calculate mol fraction H2O

Mol fraction H2O = 5.55 moles / (5.55 + 0.0874)moles

Mol fraction H2O = 0.984

Step 5: calculate the vapor pressure of the solution

This means that you can use the mole fraction of water and the vapor pressure of pure water at 25° C to determine the vapor pressure of the solution.

Psol =Xwater * Pwater

⇒Psol = the vapor pressure of the solution

⇒Xwater =the mol fraction of water

⇒Pwater = the vapor pressure of pure water

Psol = 0.984 * 23.7 torr

Psol = 23.3 torr

The vapor pressure of the solution is 23.3 torr

3 0

3 years ago