Which of the following is not true?

What is the molar mass of 1-butene if 5.38 × 1016 molecules of 1-butene weigh 5.00 μg?

xenn [34]

<h3>Answer:</h3>

Molar Mass = 56 g.mol⁻¹

<h3>Explanation:</h3>

Data Given:

Mass = 5.00 μg = 5.0 × 10⁻⁶ g

Number of Molecules = 5.38 × 10¹⁶ Molecules

Step 1: Calculate Moles of 1-Butene:

As we know one mole of any substance contains 6.022 × 10²³ particles (atoms, ions, molecules or formula units). This number is also called as Avogadro's Number.

The relation between Moles, Number of Particles and Avogadro's Number is given as,

Number of Moles = Number of Particles ÷ 6.022 × 10²³

Putting values,

Number of Moles = 5.38 × 10¹⁶ Molecules ÷ 6.022 × 10²³

Number of Moles = 8.93 × 10⁻⁸ Moles

Step 2: Calculate Molar Mass of 1-Butene:

As,

Mole = Mass ÷ M.Mass

Solving for M.Mass,

M.Mass = Mass ÷ Mole

Putting values,

M.Mass = 5.0 × 10⁻⁶ g ÷ 8.93 × 10⁻⁸ mol

M.Mass = 55.99 g.mol⁻¹ ≈ 56 g.mol⁻¹

4 0

3 years ago

What are the pros and cons of modern medicine? (I'm rewarding 25 points)

Sergio [31]

Pros: The rate at which modern medicine is advancing is astonishing. You can sit on your couch and watch TV and see commercials for new medications at an alarming pace — and these new medications have reduced our death rates for stroke, heart disease, and cancer. In fact, due to modern medicine, the death rate from heart disease has decreased by 60% since 1970! The death rate for HIV/AIDS has dropped more than 75% since 1995, when its was at its peak.

Cons: However, critics of modern medicine are quick to point out that there is a pill for everything . Yes we are quick to create more drugs, and yes, we are living longer due to said drugs but are we living better?
Medicine has evolved, and we now have surgeons who are able to perform surgeries robotically. But critics point out that medicine has evolved to the point that we are treating disease instead of preventing it .

8 0

3 years ago

How many moles are there in a 2.00 kg bottle of water?

Nostrana [21]

2000/18 =111.111111
111.1 moles

5 0

3 years ago

Cryolite (Na3AlF6) is used in the production of aluminum from its ores. It is made by the reaction 6 NaOH 1 Al2O3 1 12 HF 8n 2 N

kap26 [50]

<u>Answer:</u> The mass of cryolite produced in the reaction is 1181.8 g

<u>Explanation:</u>

To calculate the number of moles, we use the equation: