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vampirchik [111]
3 years ago
6

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:

<h2>1565.2 kg</h2>

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

<h3>1565.2 kg</h3>

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
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