Chemistry, 11.01.2021 04:30, lbshel08

10. How many moles of Ne are in a 0.50L tube at 200kPa and 50 °C? 11,60

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answered: Braxtonw875

0.04 mol Ne

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Gas Laws

Combined Gas Law: PV = nRT

P is pressure (in kPa)V is volume (in liters)n is amount of molesR is gas constant - $\displaystyle 8.314 \frac{kPa \cdot L}{mol \cdot K}$ T is temperature (in Kelvins)

Explanation:

Step 1: Define

P = 200 kPa

V = 0.50 L

T = 50°C

Step 2: Identify Conversions

Temperature Conversion: K = °C + 273.15

Step 3: Convert

Substitute T [TC]: K = 50°C = 273.15Add: K = 323.15

Step 4: Find Moles

Substitute [CBL]: $\displaystyle (200 \ kPa)(0.50 \ L) = n(8.314 \frac{kPa \cdot L}{mol \cdot K} )(323.15 \ K)$ Multiply: $\displaystyle 100 \ kPa \cdot L = n(2686.67 \frac{kPa \cdot L}{mol})$ Isolate n: $\displaystyle 0.037221 \ mol = n_{Ne}$ Rewrite: $\displaystyle n_{Ne} = 0.037221 \ mol$

Step 5: Check

Follow sig fig rules and round. We are given 1 sig figs as our lowest.

0.037221 mol Ne ≈ 0.04 mol Ne

answered: Guest

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally

answered: Guest

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

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10. How many moles of Ne are in a 0.50L tube at 200kPa and 50 °C? 11,60...