Answer:
The average atomic mass is 86.565
Explanation:
An element's average atomic mass is the sum of the products of the masses of the isotopes of the element and their percentage abundance divided by 100
The average atomic mass of the Element X is given as follows;
Isotope type 1 (85.91) ×
Isotope Abundance (%) Mass /100 Portion of average mass
Type 1 67.25 × 85.91 ÷ 100 57.774475
Type 2 32.75 × 87.91 ÷ 100 28.790525
Average atomic mass = 86.565
The average atomic mass = 86.565.
First, let's find the number of moles of ammonium nitrite.
0.5 mol/L * 1.10 L = 0.6 mol
The decomposition reaction is
NH₄NO₂ → N₂ + 2 H₂O
Let's calculate the amount of N₂ gas produced.
0.6 mol * 1 mol N₂/1 mol NH₄NO₂ = 0.6 mol N₂
Then, let's compute P through the ideal gas equation:
P = nRT/V
P = (0.6)(0.0821 L-atm/mol-K)(25+273 K)/10 L
P = 1.47 atm
Answer:
explanation and image attached
Explanation:
Our aim is to draw a structure of XeO2F2 whith the least formal charges. We must remember that the compound has 34 valence electrons.
To obtain the least formal charges then Xe must have a total of twelve electrons on its valence shell instead of eight.
The other atoms around the central Xe atom are arranged as shown in the image attached.
Image Credit: UCLA
Answer:
The correct answer is - a) red, blue and violet.
Explanation:
In the visible spectrum, the hydrogen atom emits four different wavelengths that are visible to the human eye. The four wavelengths are these lines are 656 nm, 486 nm, 434 and 410 nm. Shorter wavelengths are not visible to human eyes fall in ultravoilet lights at less than 400 nm.
The H-α line is the red color wavelength at 656 nm, the blue color has two different wavelengths that are 486 nm sometimes called cyan, and 434 nm, and violet at 410 nm.
Answer:
No pigment.
Explanation:
Pigment makes color, and hair loses color when it loses pigment.