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3 years ago

Which formula can represent an alkyne? *

Chemistry

1 answer:

Ghella [55]3 years ago

5 0

the answer is (3). C3H4

Explanation :

C3H4 is propyne.

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What mass of oxygen is required to completely react with 2 moles of ch4

Firlakuza [10]

The balanced reaction that describes the reaction between methane and oxygen to produce water and carbon dioxide is expressed CH4 + 2 O2 = CO2 +2H2O. Hence for 2 moles of methane used, 4 moles of oxygen are needed to react completely.

7 0

2 years ago

The net force on a vehicle that is accelerating at a rate of 1.15 m/s2

Softa [21]

Answer:

Explanation:

The mass of the vehicle can be found by using the formula

$m = \frac{f}{a} \\$

f is the force

a is the acceleration

From the question we have

$a = \frac{1800}{1.15} \\ = 1565.217...$

We have the final answer as

Hope this helps you

7 0

2 years ago

Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH

weeeeeb [17]

Answer:1)1.99 M

Explanation:

Molarity is given as = moles solute/Liter solution

The solute which is LiOH is already given in moles as 1.495 moles

Given that solution is 750 mL, we convert to liters.

Liters of the solution= mL of the solution x (1 L/1000 mL)

750 mL x (1 L/1000 mL)

0.75 L

Molarity = moles solute/Liter solution

Molarity = 1.495 moles of LiOH/0.75 L of solution

Molarity = 1.99M

The molarity of this solution is 1.99M (moles per liter).

5 0

3 years ago

The action of some commercial drain cleaners is based on the following reaction: 2 NaOH(s) + 2 Al(s) + 6 H2O(l) → 2 NaAl(OH)4(s)

Blababa [14]

Answer : The volume of $H_2$ gas formed at STP is 7.86 liters.

Explanation :

The balanced chemical reaction will be:

$2NaOH(s)+2Al(s)+6H_2O(l)\rightarrow 2AnAl(OH)_4(s)+3H_2(g)$

First we have to calculate the moles of $Al$ .

$\text{Moles of }Al=\frac{\text{Mass of }Al}{\text{Molar mass of }Al}$

Molar mass of Al = 27 g/mole

$\text{Moles of }Al=\frac{6.32g}{27g/mole}=0.234mole$

Now we have to calculate the moles of $H_2$ gas.

From the reaction we conclude that,

As, 2 mole of $Al$ react to give 3 mole of $H_2$

So, 0.234 moles of $Al$ react to give $\frac{0.234}{2}\times 3=0.351$ moles of $H_2$

Now we have to calculate the volume of $H_2$ gas formed at STP.

As, 1 mole of $H_2$ gas contains 22.4 L volume of $H_2$ gas

So, 0.351 mole of $H_2$ gas contains $0.351\times 22.4=7.86L$ volume of $H_2$ gas

Therefore, the volume of $H_2$ gas formed at STP is 7.86 liters.

6 0

2 years ago

An isotope of the element fluorine has 9 protons and 10 neutrons. What is the name of this isotope?

Dimas [21]

Answer:

fluorine atom

Explanation:

4 0

3 years ago