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4 years ago

What is the formula for single replacement reaction

1 answer:

6 0

A single-displacement reaction, also known as asingle-replacement reaction, is a type of chemical reactionwhere an element reacts with a compound and takes the place of another element in that compound.

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Combustion reactions are a notable source of carbon dioxide in the environment. Using the following balanced equation, how many

iris [78.8K]

Answer:

Explanation:

Number of moles of propane:

=Mass in grams ÷ Relative molecular Mass

= 100/((12*3) + (1*8))

= 100 ÷ 44

= 2.2727

Mole ratio propane:carbon (IV) oxide = 1:3(from the equation)

Number of moles of CO2 = 3*2.2727 = 6.8181

Mass in grams = Relative molecular Mass * Number of moles

= 44 * 6.8181

= 299.9964 grams

8 0

4 years ago

I need answers for all of this questions pleaseee it's due tomorrow

svet-max [94.6K]

1. 8
2. It's a Noble gas
3. No because it doesn't need any more electrons
4. Physical - odorless yellow inflammable and conductive when it's a plasma
Chemical - unstable

Pick me as brainliest pl0x XD

6 0

3 years ago

Hello, please can you solve my question:

weqwewe [10]

Mass number is sum of protons and neutrons so 22+26
The sum would be 48
Mass number is 48

7 0

3 years ago

8. What is the heat of reaction when hydrogen and oxygen combine to form water?

valina [46]

Answer:

The heat of reaction when hydrogen and oxygen combine to form water is :

Explanation:

Enthalpy Change = The enthalpy change for the formation of 1 mole of the substance from their standard state is called the enthalpy of formation.

This is intensive quantity as it is fixed for 1 mole .

Intensive properties = Those properties which are independent on the amount of the substance are intensive properties.

The value of these quantities does not get halve if you divide the substance into two equal parts. example , density, refractive index.

However , the enthalpy of reaction is extensive. Because on increasing the amount the value of the enthalpy also get doubles

Hence for this reaction :

$2H_{2}(g)+O_{2}\rightarrow 2H_{2}(l)$

Its value is -285.8 kJ for 1 mole

And here two moles are present . so the value of molar enthalpy is:

-285.8 x 2 = -571.6 kJ

8 0

4 years ago

A radio station transmits a signal with a wavelength of 3.11 meters. At what frequency is

Leni [432]

Answer:

$\large \boxed{\text{2. 96.4 MHz}}$

Explanation:

The formula relating the frequency (f) and wavelength (λ) is

fλ = c

$\begin{array}{rcl}f \times \text{3.11 m}& =& 2.998 \times 10^{8} \text{ m$\cdot$s$^{-1}$}\\f & = & \dfrac{2.998 \times 10^{8} \text{ s$^{-1}$}}{3.11}\\\\& = &9.64 \times 10^{7}\text{ s}^{-1}\\& = &\text{96.4 $\times 10^{6}$ Hz}\\& = &\textbf{96.4 MHz}\\\end{array}\\\text{The radio station is broadcasting at a frequency of $\large \boxed{\textbf{96.4 MHz}}$}$

8 0

3 years ago