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3 years ago

Define saturated and unsaturated fats

Chemistry

1 answer:

REY [17]3 years ago

5 0

Answer:

unsaturated fats, which are liquid at room temperature,are different from saturated fat because they contain one or more double bonds and fewer hydrogen atoms on their carbon chain.

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A compound consists of 81.8% C and 18.2% H by mass. What is its empirical formula?

nataly862011 [7]

Answer:

Empirical formula of 81.8 carbon and 18.2 hydrogen

Steps

Find the empirical formula of a compound that has 81.8% of Carbon (C), 18.2% of Hydrogen (H).
Divide by fractional component of each mole value: C=1.5354936431103, H=4.0709872862205Round to closest whole numbers: C=2, H=4

<h3> Combine to get the empirical formula: C2H4</h3>

5 0

3 years ago

Calculate the volume (in cm³) of 38.5 grams of platinum if the density of platinum is 21.5 g/cm³. Give your answer to 2 decimal

Gennadij [26K]

Answer:

$\boxed {\boxed {\sf v\approx 1.79 \ cm^3}}$

Explanation:

The formula of density is:

$d=\frac{m}{v}$

If the formula is rearranged for volume, it becomes:

$v=\frac{m}{d}$

The mass of the platinum is 38.5 grams.

The density is 21.5 grams per cubic centimeter.

$m=38.5 \ g \\d= 21.5 \ g/cm^3$

Substitute the values into the formula.

$v=\frac{38.5 \ g}{ 21.5 \ g/cm^3}$

Divide. Note that the grams (g) will cancel each other out.

$v=1.79069767 \ cm^3$

Round to 2 decimal places (hundredth place). The 0 in the thousandth place tells us to leave the 9 in the hundredth place.

$v\approx 1.79 \ cm^3$

The volume is about <u>1.79 cubic centimeters.</u>

6 0

3 years ago

Read 2 more answers

If the gas inside the flask is cooled so that its pressure is reduced from 797.3 torr to a value of 715.7 torr what will be the

nadezda [96]

The differential pressure is
797.9 - 715.7 = 82.2 torr = 138815.25 Pa
The height of the mercury in the open-end arm is calculated using
ΔP = ρgh
The density of mercury is 13560 kg/m3
The height of the mercury is
138815.25 Pa = 13560 kg/m3 (9.81 m/s2) h
h = 1.04 m

4 0

3 years ago

Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The o

liberstina [14]

Answer: Molar concentration of the tree sap have to be 0.783 M

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iCRT$

where,

$\pi$ = osmotic pressure of the solution = 19.6 atm

i = Van't hoff factor = 1 (for non-electrolytes)

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $32^oC=[273+32]=305K$

Putting values in above equation, we get:

$19.6atm=1\times C\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 305K$

$C=0.783M$

Thus the molar concentration of the tree sap have to be 0.783 M to achieve this pressure on a day when the temperature is 32°C

4 0

3 years ago

The reaction

scZoUnD [109]

Answer:

The correct answer is option A.

Explanation:

$POCl_3 (g)\rightleftharpoons POCl (g) + Cl_2 (g)$

Reducing the partial pressure of chlorine gas means that removal of chlorine gas from the equilibrium will shift the equilibrium in the direction according to Le Chatelier's principle.

On a removal of product from the equilibrium shifts the reaction in the forward reaction for reestablishment.So, when the partial pressure of chlorine is reduced by 50% the equilibrium will shift in forward direction in which $POCL_3$ will be consumed to form more chlorine gas.

Hence, A is correct .

8 0

4 years ago

Define saturated and unsaturated fats​

Define saturated and unsaturated fats