In the modern periodic table, elements are arranged by increasing atomic number.
We know that Copper ll 's symbol is

and Nitride's is

Because both have opposite charges of +2 and -2, they both cancel out when written. When writing a chemical formula, the cation (positive ion/element) is written before the anion (negative ion). The formula name already had the correct order. Therefore, your chemical formula is just
CuNHope this helps!
The temperature of the nitrogen gas is 292.5 K.
<u>Explanation:</u>
Given that
Moles of Nitrogen, n = 5 mol
Volume, V = 30 L
Pressure, P = 4 atm
Gas Constant, R = 0.08205 L atm mol⁻¹ K⁻¹
Temperature = ? K
We have to use the ideal gas equation,
PV = nRT
by rearranging the equation, so that the equation becomes,
T = 
Plugin the above values, we will get,
T = 
= 292.5 K
So the temperature of the nitrogen gas is 292.5 K.
Answer:
1'426,000,000 years old
Explanation:
To solve this problem we should keep in mind the definition of <em>half-life</em>: it is <u>the amount of time it takes for a substance to lose half of its radioactivity</u>. For example, if a substance made of 100 radioactive atoms had a half-life of 3 years, then after 3 years there would only be 50 such atoms, then after other 3 years the value would reduce to 25 and so on.
Because in the problem there's only one quarter (1/4) of the original content in the sample, we can deduce that two half-lives have passed, in other words:
713,000,000 years * 2 = 1'426,000,000 years
Answer:
A is the answer as long as i can remember i was taught