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3 years ago

True or false the molecular formula for ibuprofen is the same as the empirical formula

1 answer:

7 0

I believe the above statement is true.
The empirical formula for ibuprofen is C₁₃H₁₈O₂, which is also its molecular formula. The empirical formula of a compound represents the lowest whole number ratio of the elements in it. The molecular formula on the other hand indicates the exact number of atoms in a molecule. Ibuprofen is a drug that is used to manage mild to moderate pain, fever, inflammation, menstrual cramps, and types of arthritis.

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In a sine curve, like a water wave, the high points are the crests and the low points are the (blank)

LenaWriter [7]

Answer:

The low points are called troughs

4 0

3 years ago

A boat is subject to hydrodynamic drag forces of F = 40v 2 [N] where v is the magnitude of velocity in [m/s]. The boat’s mass is

stepladder [879]

Answer:

It has moved a distance, S = 25.9 m

Explanation:

F = 40 v²........(1)

$F = mv\frac{dv}{dS}$ .........(2)

Equating (1) and (2)

$-mv\frac{dv}{dS} = 40 v^2\\\\v\frac{dv}{dS} = \frac{-40 v^2}{m} \\\\m = 450 kg\\v\frac{dv}{dS} = \frac{-40 v^2}{450}\\\\ \frac{dv}{v} = \frac{40}{450} dS\\$

Integrate both sides:

$v_1 = 1, v_2 = 10$

$\int\limits^{10}_1 {\frac{1}{v} } \, dv = \frac{-40}{450} \int\limits^S_0 \, dS \\\\ln\frac{1}{10} = \frac{-40}{450} (S-0)\\\\S = \frac{-40}{450} ln(0.1)\\\\S = 25.9 m$ .

6 0

3 years ago

What is the fraction of the hydrogen atom's mass (11h) that is in the nucleus? the mass of proton is 1.007276 u, and the mass of

Alex_Xolod [135]

The mass fraction of the hydrogen atom is 0.9995 u.

<h3>Calculation:</h3>

We know that mass fraction can be determines as,

Mass fraction = Mass of proton/mass of H atom

Given,

Mass of proton = 1.007276 u

Mass of H atom = 1.007825 u

Put the values in the formula,

Mass fraction = Mass of proton/mass of H atom

Mass fraction = 1.007276/1.007825

= 0.9995 u

Hence, the mass fraction of the hydrogen atom is 0.9995 u.

Learn more about mass fraction here:

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3 0

2 years ago

A hot metal washer is placed in a jar of cool water.

ipn [44]

The answer is Conduction: the process of heat is directly transmitted through a substance when there is a difference in temperature.

8 0

3 years ago

a car accelerates at a constant rate from 15 m/s to 25 m/s while it travels a distance of 125 m. How long does it take to achiev

atroni [7]

T=Vf-Vi/s
25m/s -15m/s/ 125m
10m/s /125m
=0.08s
I hope it’s correct !

6 0

3 years ago