All categories

3 years ago

How much 6.0M HNO(small 3) is needed to neutralize 39mL of 2 M KOH

Chemistry

1 answer:

Digiron [165]3 years ago

8 0

Equation of reaction
KOH+HNO3--->KNO3+H2O 
CA=6.0M, CB=2.0M, VA=?, VB=39ml, na=1, nb=1 
CAVA/CBVB=na/nb 
6*VA/2*39=1/1 
6VA/78=1 
6VA=78 
VA=78/6. VA=13ml. 
VA=13ml.
Hope this helped!!!!! Don't forget Brainliest!!!!! You can always PM me if you don't want to waste any points!!!!!

You might be interested in

In the digestive system, food that has been completely processed is found __________.

Dafna11 [192]

In the large intestines.

7 0

3 years ago

The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2CrO3(s) + 3Si(s)----> 4Cr(l) + 3SiO2

nalin [4]

Answer: 51.45 grams of excess reagent is left after the completion of reaction.

Explanation: For the calculation of moles, we use the formula:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$ ....(1)

For Si

Given mass = 92 grams

Molar mass = 28g/mol

Putting values in equation 1, we get:

$Moles=\frac{92g}{28g/mol}=3.285moles$

For $Cr_2O_3$

Given mass = 112 grams

Molar mass = 116g/mol

Putting values in equation 1, we get:

$Moles=\frac{112g}{116g/mol}=0.965moles$

The reaction follows:

$2Cr_2O_3(s)+3Si(s)\rightarrow 4Cr(l)+3SiO_2(s)$

By Stoichiometry,

2 moles of $Cr_2O_3$ reacts with 3 moles of silicon

So, 0.965 moles of $Cr_2O_3$ reacts with = $\frac{3}{2}\times 0.965$ = 1.4475 moles of Silicon.

As, the moles of silicon is more than the required amount and is present in excess.

So, the excess reagent for the reaction is Silicon.

Moles of silicon remained after reaction = 3.285 - 1.4475 = 1.8375 moles

To calculate the amount of Silicon left in excess is calculated by using equation 1:

$1.8375=\frac{\text{Given mass}}{28}$

Amount of Silicon in excess will be 51.45 grams.

5 0

4 years ago

Describe the relationship between the atomic number, mass number, number of protons, number of neutrons.

Charra [1.4K]

Explanation:

Atomic number (Z) = Number of the protons

It means that if the atomic number of C is 6, it implies that the number of protons in carbon is 6 too.

Mass number (M) = Number of the protons + Number of the neutrons

It means that if the atomic mass of C is 12, it implies that the number of protons and the neutrons in carbon is 12.

8 0

3 years ago

Given the following equation, how many grams of PbCO3 will dissolve when exactly 1.0 L of 1.00 M H+ is added to 6.00 g of PbCO3?

9966 [12]

Calculating for the moles of H+
1.0 L x (1.00 mole / 1 L ) = 1 mole H+

From the given balanced equation, we can use the stoichiometric ratio to solve for the moles of PbCO3:
1 mole H+ x (1 mole PbCO3 / 2 moles H+) = 0.5 moles PbCO3

Converting the moles of PbCO3 to grams using the molecular weight of PbCO3
0.5 moles PbCO3 x (267 g PbCO3 / 1 mole PbCO3) = 84.5 g PbCO3

4 0

3 years ago

Read 2 more answers

Which of the following most likely happens when the temperature of gas increases

Zigmanuir [339]

Answer:

The answer is b. The number of collisions of gas particles increases

5 0

2 years ago

Read 2 more answers