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alukav5142 [94]
3 years ago
14

Whats the noble gas notation for copper

Chemistry
1 answer:
sergey [27]3 years ago
5 0
Copper has an electron configuration of [Ar] 3d10 4s1. Now sometimes the noble state is written as [Ar] 3d10 4s1 or as [Ar] 4s2 3d9.
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What is OSHA's mission
amid [387]

Answer:

"To ensure safe and healthful working conditions for working men and women by setting and enforcing standards and by providing training, outreach, education and assistance."

Explanation:

Hello,

The OSHA -Occupational Safety and Health Administration- is an agency of the United States Department of Labo signed into law on December 29, 1970. It was created to prevent workers from being killed or seriously harmed at work. The law requires that employers provide their employees with working conditions that are free of known dangers.

The mission is "to ensure safe and healthful working conditions for working men and women by setting and enforcing standards and by providing training, outreach, education and assistance."

Best regards.

7 0
3 years ago
1‑propanol ( nn ‑propanol) and 2‑propanol (isopropanol) form ideal solutions in all proportions. Calculate the partial pressure
likoan [24]

Answer:

Piso = 32.17 Torr

Pprop = 5.079 Torr

yprop = 0.1364

yiso = 0.8636

Explanation:

From the question; we can opine that :

  • The mole fraction of isopropanol in a mixture of isopropanol and propanol will be 1.
  • The partial pressure of isopropanol will be its mole fraction multiplied by vapor pressure of isopropanol
  • The partial pressure of propanol will be its mole fraction multiplied by vapor pressure of propanol
  • In the vapor, the mole fraction of propanol will be its partial pressure divided by the sum of the two partial pressures      

NOW;

When xprop = 0.243; xisopropanol will be 1- 0.243 = 0.757

P°iso = 45.2 Torr at 25 °C so

Piso will be 45.2 × 0.757 = 32.17 Torr

Pprop will be 20.9 × 0.243 = 5.079 Torr

yprop = 5.079/(5.079 +32.17) = 0.1364

yiso = 1-0.1364 = 0.8636

5 0
3 years ago
which of the following represents a compound? a. cl2 b. n2 c. co2 d. h2 user: which of the following represents an element? a.co
babunello [35]
C. CO2 is the compound (carbon dioxide) while N2 is the element (nitrogen)
6 0
3 years ago
How many grams of CaF2 would be needed to produce 1.12 moles of F2?
zlopas [31]

Step 1 : Write balanced chemical equation.

CaF₂ can be converted to F₂ in 2 steps. The reactions are mentioned below.

I] CaF_{2} + H_{2} SO_{4} -------> 2HF + CaSO_{4}

II] 2HF -------> H_{2} + F_{2}

The final balanced equation for this reaction can be written as

CaF_{2} + H_{2} SO_{4} --------->  CaSO_{4} + H_{2} + F_{2}

Step 2: Find moles of CaF₂ Using balanced equation

We have 1.12 mol F₂

The mole ratio of CaF₂ and F₂ is 1:1

1.12mol F_{2} *  \frac{1molCaF_{2}}{1molF_{2}}    = 1.12molCaF_{2}

Step 3 : Calculate molar mass of CaF2.

Molar mass of CaF₂ can be calculated by adding atomic masses of Ca and F

Molar mass of CaF₂ = Ca + 2 (F)

Molar mass of CaF₂ = 40.08 + 18.998 = 78.08 g

Step 4 : Find grams of CaF₂

Grams of CaF₂ = 1.12molCaF_{2} *\frac{78.08gCaF_{2}}{1mol CaF_{2}}

Grams of CaF₂ = 87.45 g

87.45 grams of CaF2 would be needed to produce 1.12 moles of F2.

4 0
3 years ago
Read 2 more answers
I need help with this question please
elena-s [515]
The answer is B.

This is because the temperature can affect the rate of reaction. The higher the temperature, the more the molecules move and collide with one another. If the temperature is decreased, the molecules will move slower and not collide as much.

5 0
3 years ago
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