Answer:
35.48 uma
Explanation:
An isotope is when an element has equal numbers of protons but different mass value because it has different amount of neutrons.
To calculate the average atomic mass with the given data:
First change de percentages to fractional numbers, divide by 100.
Remember the sum of a percentage is equal to 100, but when you are adding the fractions the sum is equal to 1.
76/100 = 0.76
24/100 = 0.24
% fraction
76.00 0.76
24.00 0.24
total100.00 1.00
Now, multiply the mass with their corresponding fraction:
35(0.76) = 26.60
37(0.24) = 8.88
% fraction amu amu
76.00 0.76 35 26.60
24.00 0.24 37 8.88
total100.00 1.00 average 35.48
Now you add the calculated mass to obtain the average atomic mass of the element.
And the value you will get is 35.48 amu.
I included an excel table so you can review it, I like to organize all the given data and the calculation in tables, also I think is easier to understand.
Quantitative data can be counted, measured, and expressed using numbers. Qualitative data is descriptive and conceptual.
(3) HF because HCl is an acid and it seperates easily into water. Flourine has the highest electronegativity so im guessing because it pulls the electrons the hardest that it has the strongest bonds.
Voltmeter is the device that is used to measure the potential difference across the battery.
<h2>What are the usage of voltmeter?</h2><h3 /><h3>Usage of Voltmeter</h3>
Voltmeter is an instrument that measures voltages of both direct and alternating electric current. On a scale of voltmeter usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts).
Voltmeter is connected in parallel form. It has a high resistance so that it takes negligible current from the circuit so we can conclude that Voltmeter is the device that is used to measure the potential difference across the battery.
Answer:
The mass ratio of zinc to sulfide is 85:42.
2.5559 kg of Zn are in 3.82 kg of ZnS.
Explanation:
a) Mass of zinc sulfide = 254 g
Mass of zinc in a zinc sulfide sample = 170 g
Mass of sulfide in zinc sulfide sample = x
254 g = 170 g+ x
x = 84 g
The mass ratio of zinc to sulfide:
b) Mass of zincsulfide sample = 3.83 kg
The mass ratio of zinc to sulfide is 85:42.
Let the mass of zinc and sulfide be 85x and 42x respectively:
85 x+ 42 x=3.82 kg
x =0.03007 kg
Mass of an zinc= 85x=85 × 0.03007 kg= 2.5559 kg
