3 years ago

Which group has 1 valence electron?

Chemistry

1 answer:

TiliK225 [7]3 years ago

7 0

Group 1 (e.g., sodium or potassium)

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Given R=0.0821L⋅atmmol⋅K, how many moles of gas are in a 1.25 L container at 300K and 2.07 atm?(1 point)

Natalka [10]

Answer:

B, 0.105 mol

Explanation:

brainly.com/question/24865185

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2 years ago

If a tablet of acetaminophen, C8H9NO2, weighs 324 mg, how many moles are there in the tablet? If a tablet of acetaminophen, C8H9

Gnoma [55]

Answer:

$2.14*10^{-3} mol$

Explanation:

number of moles of C8H9NO2 = $\frac{mass}{molar mass}=\frac{324*10^{-3} g}{151.163g/mol}=2.14*10^{-3}mol$

The trick is to remember to convert milligrams to grams because molar mass is normally presented in grams per mole

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2 years ago

A rigid cylinder with a movable piston contains a sample of hydrogen gas. At 330. K, this sample has a pressure of 150. kPa and

Marta_Voda [28]

Answer:

V₂ = 4.34 L

Explanation:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Given data:

Initial volume = 3.50 L

Initial pressure = 150 Kpa (150/101.325 = 1.5 atm)

Initial temperature = 330 K

Final temperature = 273 K

Final volume = ?

Final pressure = 1 atm

Formula:

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂

V₂ = 1.5 atm × 3.50 L × 273 K / 330 K × 1 atm

V₂ = 1433.3 atm .L. K / 330 k.atm

V₂ = 4.34 L

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3 years ago

Megan prepares a pitcher of lemonade by adding a quarter cup of granular sugar to the mixture. Which action should she take so t

Licemer1 [7]

Can someone please help me with my chem review

3 0

2 years ago

Read 2 more answers

Is this right, I feel like its wrong

hjlf

It is correct, next time re-check your answer and don't second guess yourself. ;3

7 0

2 years ago