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3 years ago

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How many grams of oxygen are in 5.3 moles of lactose? (Using percent composition)

1 answer:

Misha Larkins [42]3 years ago

8 0

Hey Umm here you can search it honey bun

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A 5-gal, cylindrical open container with a bottom area of 120 square inches is filled with glycerin and rests on the floor of an

aleksandrvk [35]

Answer:

a) 68.9 b/ ft²

b) 57.416

Explanation:

Volume of the cylindrical open container V = 5 gal

= (5)(231)

= 11155 in³

different diagrammatic expression has been shown in the attached file below for clear understanding.

Area A = 120 in²

V = hA

= $\frac{1155}{120}$

= 9.625 in

Upward acceleration , $a_z= 3ft/s^2$

$\frac{dp}{dz} = \rho (g + a_z)$

$dp= -\rho (g + a_z)dz$

$\int\limits^P}_0 \,dp= -\rho (g + a_z) \int\limits^0_h \, dz$

$P_b =$ $-\rho (g + a_z) h$

$= (2.4)*(32.2+3) (\frac{9.625}{12})$

= 68.9 b/ ft²

b) The flowchart for the resultant force is shown in the diagram below:

with that:

$F_f = P_bA$

$F_f =\frac{(68.9)(120)}{(144)}$

$F_f =57.416$

Thus, the resultant force that the container exert on the floor of the elevator during this acceleration = 57.416

5 0

3 years ago

Which of the following best describes elements?

sukhopar [10]

Explanation:

Elements are distinct substances that cannot be split-up into simpler substances. Such substances are made up of only one kind of atom.

Elements are classified as pure substances.
They are homogeneous in all parts.
They have a definite composition.
They cannot be split or broken into simpler substances by physical means.
There are over a hundred known elements.
Elements are usually symbolized by a capital letter or capital letter followed by a smaller letter derived from the English or Latin or Greek name of the element concerned.

learn more:

Element brainly.com/question/2572495

#learnwithBrainly

6 0

4 years ago

In the process of making soap, I poured some of the cooked mixture through some muslin fabric, in order to separate the solid pa

GenaCL600 [577]

Answer:

Filtering

Explanation:

Filtration is the separation of substances from liquids

5 0

3 years ago

Which property of trinitrotoluene (tnt) is most likely a chemical property? Which property of trinitrotoluene (tnt) is most like

DIA [1.3K]

The melting point of any substance is its physical property.

colour of any substance is also its physical property.

However TNT is a chemical property. It is explosive as it dissociates into nitrogen gas , water, Carbon monoxide and carbon.

the reaction can be given as

2 C7H5N3O6 ---> 3 N2 + 5 H2O + 7 CO + 7 C

Due to carbon it gives as sooty flames

3 0

3 years ago

How many grams of KCl (s) has been produced from the thermal decomposition of KClO3 (s) that produced 50.0 mL of O2 (g) at 25 de

geniusboy [140]

Answer:

The mass is $m_{KCl} = 0.102 \ g$

Explanation:

From the question we are told that

The volume of oxygen produced is $V_o = 50mL = 50 *10^{-3} L$

The temperature is $T = 25 ^oC = 25* 273 = 298 K$

The pressure is $P = 1.0\ atm$

From the ideal gas law we have that

$PV = nRT$

Where R is the gas constant with the value

$R = 0.08206 \ atm \cdot L /mol K$

n is the number of moles making it the subject of the formula

$n = \frac{PV}{RT}$

Substituting values

$n = \frac{1 * (50 *10^{-3}) }{0.08206 * 298}$

$n = 2.045 *10^{-3} \ mol$

From the chemical equation

one mole of $KClO_3$ produces one mole of kCl and $\frac{3}{2}$ of oxygen

x mole of $KClO_3$ produces x mole of kCl and $2.045 *10^{-3} \ mol$ of oxygen

So $x = \frac{2.045 *10^{-3}}{\frac{3}{2} }$

$x = \frac{2}{3} * 2.045 *10^{-3}$

$x = 1.363 *10^{-3} \ mol$

Now the molar mass of KCl is a constant with a value

$M_{KCl} = 74.55 g/mol$

Now the mass of KCl is mathematically evaluated as

$m_{KCl} = x * M_{KCl}$

Substituting values

$m_{KCl} = 1.363 *10^{-3} * 74.55$

$m_{KCl} = 0.102 \ g$

6 0

3 years ago