All categories

2 years ago

_k+_F2=_KF mass of reactants/products

Chemistry

1 answer:

ELEN [110]2 years ago

6 0

Explanation:

K + F₂ → KF

This equation is not balanced according to the law of conservation of mass.

To balance the equation;

Put coefficients a, b and c behind the compounds

aK + bF₂ → cKF

Conservation of mass:

for K ; a = c

F; 2b = c

let a = 1

c = 1

b= $\frac{1}{2}$

Multiply the coefficients by 2 to reduce to simplest terms;

a = 2 , b = 1 and c = 2

2K + F₂ → 2KF

Learn more:

Balancing of chemical equation brainly.com/question/2612756

#learnwithBrainly

You might be interested in

Keiko needs 100mL of a 5% acid solution for a science experiment. She has available a 1% solution and a 6% solution. How many mi

4vir4ik [10]

Answer:

Keiko should mix 20 mL 1% solution and 80 mL 6% solution for to make 100 mL 5% solution

Explanation:

There are 2 unknown values X= mL 6% solution and Y=1% solution. So, we need 2 equations:

1. Equation acid concentration. X mL 6% + Y mL 1% = 100 mL 5%

2. Equation solvent concentration X mL 94% + Y mL 99% = 100 mL 95%

When clearing X and Y :

(X mL 6% + Y mL 1% = 100 mL 5%) (-15,7)

X mL 94% + Y mL 99% = 100 mL 95%

_______________________________

- Y 0.83 = 16.5

Y = 19.9 mL 1% solution

Replace Y in anyone equation and X = 80 mL 6% solution

I hope to see been helpful

7 0

2 years ago

Read 2 more answers

Suppose you wanted to make a buffer of exactly ph 7.00 using kh2po4 and na2hpo4. if the final solution was 0.10 m in kh2po4, wha

OleMash [197]

Answer:- 0.138 M

Solution:- The buffer pH is calculated using Handerson equation:

$pH=pKa+log(\frac{base}{acid})$

$KH_2PO_4$ acts as a weak acid and $Na_2HPO_4$ as a base which is pretty conjugate base of the weak acid we have.

The acid hase two protons(hydrogen) where as the base has only one proton. So, we could write the equation as:

$H_2PO_4^-\rightleftharpoons H^++HPO_4^-^2$

Phosphoric acid gives protons in three steps. So, the above equation is the second step as the acid has only two protons and the base has one proton.

So, we will use the second pKa value. The acid concentration is given as 0.10 M and we are asked to calculate the concentration of the base to make a buffer of exactly pH 7.00.

Let's plug in the values in the equation:

$7.00=6.86+log(\frac{base}{0.10})$

$7.00-6.86=log(\frac{base}{0.10})$

$0.14=log(\frac{base}{0.10})$

Taking antilog:

$10^0^.^1^4=\frac{base}{0.10}$

$1.38=\frac{base}{0.10}$

On cross multiply:

[base] = 1.38(0.10)

[base] = 0.138

So, the concentration of the base that is $Na_2HPO_4$ required to make the buffer is 0.138M.

5 0

2 years ago

Which contain covalent bonds?

Ilia_Sergeevich [38]

The only compound that contains covalent bonds would be A. BCl4-.

3 0

2 years ago

A medical class is hearing a lecture on vision. The doctor asks them what happens when the eye produces too much fluid, causing

Charra [1.4K]

Answer:

The doctor is discussing an Ocular Hypertension disease.

Explanation:

If we have a small space with a defined volume like in this case an eye, when we fill this space with a liquid, the liquid will occupy the whole volume available, and when it is much liquid or fluid, and the volume of the eye can not expand it will start to generate an internal pressure. This higher pressure is called Hypertension.

3 0

2 years ago

Which is an example of ionization? C + O2 mc004-1.jpg CO2 H2CO3 mc004-2.jpg H2O + CO2 SO2 + H2O mc004-3.jpg HSO3– + H+ Mg(OH)2 m

MrMuchimi

Your answer is SO2 + H2O ---> HSOS- + 2OH-

3 0

2 years ago

Read 2 more answers

_k+_F2=_KF mass of reactants/products​

_k+_F2=_KF mass of reactants/products