Answer:
I Can explain in the simplified explaination
Explanation:
When adding and subtracting numbers, the rules of significant figures require that the number of places after. the decimal point in the answer is less than or equal to the number of decimal places in every term in the. sum. (Treat subtraction as adding the same number with a negative sign in front of it.)
This are the Rules
Non-zero digits are always significant.
Any zeros between two significant digits are significant.
A final zero or trailing zeros in the decimal portion ONLY are significant.
For numbers with decimal points, zeros to the right of a non zero digit are significant. Thus 6.00 has three significant figures and 0.050 has two significant figures. For this reason it is important to keep the trailing zeros to indicate the actual number of significant figures.
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The famous bite mark evidence was crucial in this case because there was practically no other evidence to work from since Bundy was meticulous in cleaning up the scene.
Answer:
8 moles
Explanation:
When we are asked to convert from grams of a substance into moles, we have to use the substance's molar mass.
Meaning that for this problem, we'll <em>use the molar mass of hydrogen peroxide</em> (H₂O₂), as follows:
There are 8 moles in 272 grams of hydrogen peroxide.
We can use the ideal gas law equation to find the number of moles;
PV = nRT
where P - pressure
V - volume - 56.2 x 10⁻³ m³
n - number of moles
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature
standard temperature is 273 K
and standard pressure - 101 325 Pa
we can rearrange the equation to find the number of moles
substituting the values in the equation
n = 2.51 mol
molar mass of Ar - 40 g/mol
mass of Ar in the sample - 2.51 mol x 40 g/mol = 100.4 g
Answer:
transitive physicsif something conducts heat or electricity, heat or electricity can move through it.
Explanation: