All categories

4 years ago

Burning alcohol for fuel is a very efficient process. Please select the best answer from the choices provided

Chemistry

2 answers:

Len [333]4 years ago

7 0

Explanation:

Burning of alcohol produces different products as it depends on the type and nature of alcohol which is being burnt.

Some alcohols upon burning produce toxic gases or products whereas some alcohols on burning does not produce any toxic substances.

For example, when ethanol is burnt then it reacts with oxygen and results in the formation of water and carbon dioxide.

Thus, we can conclude that the statement burning alcohol for fuel is a very efficient process is a false statement.

Vedmedyk [2.9K]4 years ago

6 0

Burning alcohol for fuel has been used throughout history. There are some alcohols that are the best ones to use as fuels because of their nature and can be synthesized chemicaly or biologicaly. Except, some of those alcohol also has a bad effect when burned for fuel as it would cause serious negative chemical effects when exposed to the human body such as blindness or death. Therefore, the best answer would be False.

You might be interested in

What was the key characteristic by which Dmitri Mendeleev arranged his periodic table? A. increasing atomic number B. electron c

valentina_108 [34]

I think the correct answer from the choices listed above is option A. The key characteristic by which Dmitri Mendeleev arranged his periodic table was that the elements are arranged in increasing atomic number. Hope this answers the question.

4 0

3 years ago

Read 2 more answers

How many kilojoules of heat are required to melt a 10-g popsicle is 0°C ? Assume the particle has the same molar mass and heat o

Fantom [35]

<h3><u>Answer;</u></h3>

3.4 kJ

<h3><u>Explanation</u>;</h3>

Taking the mass of water as 10.0 g

Moles of water = Mass /molar mass

Moles of water in 10.0 g;

= 10g H2O x 1mol/18g

=0.56mol

But, 1 mole of water = 6.01 kJ

Hence;

6.01kJ/1mol H2O= x kJ/.56mol,

x = <u>3.4kJ</u>

4 0

4 years ago

LOSPICNOMEWTROS SON INSTRUMENTOS EMPLEADOS PARA CALCULAR DENSIDADES DE SUSTANCIAS LIQUIDAS. SE REALIZO UN EXPERIMENTO PARA DETER

Natasha_Volkova [10]

Answer:

0.66g/mL

Explanation:

La densidad es una propiedad de la materia definida como la masa de una sustancia en un determinado volumen.

En este problema, podemos hallar la densidad sabiendo que la diferencia de masas del pic vacío y el pic lleno es la masa de la solución y que el volumen que ocupa es de 25mL:

<em>Masa solución:</em>

25g - 8.5g = 16.5g

Así, la densidad será:

16.5g / 25mL =

3 0

3 years ago

For each of the following, indicate if the number of half-lives elapsed is:

Hunter-Best [27]

Answer:

<u>a. one half-life</u>

<u>b. three half-lives</u>

<u>c. two half-lives</u>

Explanation:

The number of half-lives elapsed, n, is calculated dividing the time by the half-life time:

n = time / half-life time

<u>a. A sample of Ce-141 with a half-life of 32.5 days after 32.5 days</u>

n = 32.5 days / 32.5 days = 1 half-life

<u />

<u>b. A sample of F-18 with a half-life of 110 min after 330 min</u>

n = 330 min / 110 min = 3 half-lives

<u />

<u>c. A sample of Au-198 with a half-life of 2.7 days after 5.4 days</u>

n = 5.4 days / 2.7 days = 2 half-lives

4 0

3 years ago

In the unit cell of galena, six square faces of equal size each form 90 degree angles with every adjacent face. What type of cry

lbvjy [14]

Answer : The correct option is, Cubic.

Explanation :

As there are seven types of crystal systems which are cubic, tetragonal, orthorhombic, monoclinic, triclinic, rhombohedral and hexagonal.

A unit cell is characterized by the axial length (a, b and c) and axial angle $(\alpha ,\beta ,\gamma )$ parameters which decide the size and shape of the unit cell.

In tetragonal crystal system, $a=b\neq c$ and $\alpha=\beta=\gamma=90^o$

In hexagonal crystal system, $a=b\neq c$ and $\alpha=\beta=90^o,\gamma=120^o$

In triclinic crystal system, $a\neq b\neq c$ and $\alpha\neq \beta\neq \gamma=90^o$

In cubic crystal system, $a=b=c$ and $\alpha=\beta=\gamma=90^o$

Hence, the correct option is, Cubic.

7 0

3 years ago