If I understand this right, the two elements are Nickel and Copper, elements 28 and 28, respectively. A nickel is worth 5 cents, and a penny, originally comprised of copper, is worth one - the total being six cents.

7 0

3 years ago

A sample was collected and analyzed. If there are only three gasses present, the total pressure of the sample is 194.66 kPa, the

dmitriy555 [2]

I dont get the question

6 0

3 years ago

An unknown gas has a volume of 20L at 140K. What is its volume at STP? Be sure to show the setup and the final

kramer

Answer:

v₂ = 39L

Explanation:

Given parameters:

Initial volume of gas = 20L

Initial temperature = 140K

Unknown:

Final volume = ?

Solution:

Since the standard temperature of any gas is 273K, the final temperature is this 273K;

Applying Charles's law:

$\frac{v_{1} }{T_{1} }$ = $\frac{v_{2} }{T_{2} }$

v and T are volume and Temperature

$\frac{20}{140}$ = $\frac{v_{2} }{273}$

v₂ x 140 = 20 x 273

v₂ = 39L

6 0

3 years ago

Which of the following is an example of a defined contribution plan?'

Roman55 [17]

Hello
It's both a and b

7 0

4 years ago