All categories

3 years ago

This type of fatty acid has at least one double bond in the carbon-to-carbon chain and also contains protective qualities

1 answer:

8 0

There are two general classifications of fatty acids according to their structure: saturated and unsaturated fatty acids. Unsaturated fatty acids are those that contain at least one of either a double or triple bond. Therefore, the answer to this questions is: unsaturated fatty acid. Its function is to protect the organs as a cushion, or as storage area for excess energy.

You might be interested in

In NMR if a chemical shift(δ) is 211.5 ppm from the tetramethylsilane (TMS) standard and the spectrometer frequency is 556 MHz,

Vika [28.1K]

Answer:

The answer is: 11759 Hz

Explanation:

Given: Chemical shift: δ = 211.5 ppm, Spectrometer frequency = 556 MHz = 556 × 10⁶ Hz

In NMR spectroscopy, the chemical shift (δ), expressed in ppm, of a given nucleus is given by the equation:

$\delta (ppm) = \frac{Observed\,frequency (Hz)}{Frequency\,\, of\,\,the\,Spectrometer (MHz)} \times 10^{6}$

$\therefore Observed\,frequency (Hz)= \frac{\delta (ppm)\times Frequency\,\, of\,\,the\,Spectrometer (MHz)}{10^{6}}$

$Observed\,frequency= \frac{211.5 ppm \times 556 \times 10^{6} Hz}{10^{6}} = 11759 Hz$

<u>Therefore, the signal is at 11759 Hz from the TMS.</u>

6 0

3 years ago

Which have more molecules ? 20 g of ammonia or 30 g of oxygen gas?

hodyreva [135]

I think it's oxygen gas

5 0

3 years ago

How is the density of a substance calculated?

murzikaleks [220]

Example:

sample density of gasoline, 20 g of weigth into 5 <span>mL

Answer:

D = m / V

D = 20 g / 5 mL

D = 4 g/mL</span>

3 0

3 years ago

An experiment to measure the enthalpy change for the reaction of aqueous

Komok [63]

Given that, an experiment to measure the enthalpy change for the reaction of aqueous copper(II) sulfate, CuSO4(aq) and zinc, Zn(s) was carried out in a coffee cup calorimeter; the heat of the reaction in the whole system is calculated to be 2218.34 kJ

Heat of reaction (i.e enthalpy of reaction) is the quantity of heat that is required to be added or removed when a chemical reaction is taken place in order to maintain all of the compounds present at the same temperature.

The formula used to calculate the heat of the reaction can be expressed as follows:

Q = mcΔT

where:

Q = quantity of heat transfer
m = mass
c = specific heat of water = 4.18 kJ/g °C (constant)
ΔT = change in temparature

From the information given:

The initial temperature (T₁) = 25° C
The final temperature (T₂) = 91.5° C

∴

The change in temperature i.e. ΔT = T₂ - T₁

ΔT = 91.5° C - 25° C

ΔT = 66.5° C

The number of moles of CuSO₄ = 1.00 mol/dm³ × 50.0 cm³

$\mathbf{= (1 \times \dfrac{50}{1000})\ moles}$

= 0.05 moles

Since the molar mass of CuSO₄ = 159.609 g/mol

Then;

Using the relation:

$\mathbf{number \ of \ moles = \dfrac{mass}{molar \ mass}}}$

By crossing multiplying;

mass of CuSO₄ = number of moles of CuSO₄ × molar mass of CuSO₄

mass of CuSO₄ = 0.05 moles × 159.609 g/moles

mass of CuSO₄ = 7.9805 grams

∴

Using the formula from above:

Q = mcΔT

Q = 7.9805 g × 4.18 kJ/g °C × 66.5° C

Q = 2218.34 kJ

Therefore, we can conclude that the heat of the reaction is 2218.34 kJ

Learn more about the chemical reaction here:

brainly.com/question/20250226?referrer=searchResults

8 0

2 years ago

Lab Report: Paper Chromatography

vampirchik [111]

Answer:

the answer is "I HOPE IT HELPS"

7 0

3 years ago