All categories

3 years ago

Pleassseeeee i’ll give brainiest!!!!!!!!

Chemistry

1 answer:

schepotkina [342]3 years ago

8 0

Answer:

The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want.

change 25 grams of potassium chlorate to moles.

calculate the gram molecular mass of potassium chlorate.

Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron.

1 K x 39 grams/mole

+1 Cl x 35.4 grams/ mole

+3 O x 16 grams/ mole

= 122.4 grams / mole Potassium Chlorate

122.4

= moles.

2.05 moles of Potassium Chlorate.

There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride.

2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride.

Find the gram molecular mass of Potassium Chloride.

1 K x 39 = 39

+1 Cl x 35.4 = 35.4

= 74.4 grams / mole.

2.05 moles x 74.4 grams/ mole = 15.2 grams

Explanation:

hope this helped :)

You might be interested in

Determine the empirical formula for a compound that contains 48.6%C, 8.2% H, and 43.2% S by mass.

vagabundo [1.1K]

The empirical formula for a compound that contains 48.6%C, 8.2% H, and 43.2% S by mass is $C_3H_6S$ .

<h3>What is the empirical formula?</h3>

An empirical formula tells us the relative ratios of different atoms in a compound.

We need to calculate the number of moles

Number of a mole of carbon =

48.6 g X ( $\frac{1 mole }{ 12.0107 g}$ ) =4.05 mole

Number of a mole of hydrogen =

8.2g X ( $\frac{1 mole}{.00784g}$ ) =8.14 mole

Number of moles of sulphur =

43.2g X ( $\frac{ mole}{32.065g}$ ) = 1.35 mole

Dividing each mole using the smallest number that is divided by 1.35 moles.

Carbon= $\frac{4.05 mole }{1.35 mole}$ =3

Oxygen= $\frac{8.14 mole}{1.35 mole}$ =6

Sulfur= $\frac{1.35 mole}{1.35 mole}$ =1

Empirical formula is $C_3H_6S$

Learn more about empirical formula here:

brainly.com/question/14044066

#SPJ1

4 0

2 years ago

Question 5 of 5

Romashka [77]

Answer:

Explanation:

l took the test

8 0

3 years ago

Lee is in customer service. How can she best support her internal customer, Dan? O al Prioritize other tasks and customers O b)

Thepotemich [5.8K]

Answer:

do i care lol LOOK AT THIS

VVVVVVVVVVVVVVVVVVV

7 0

3 years ago

If a red blood cell is 100% saturated, how many molecules of O2 are bound to it?1 billion molecules of O24 molecules of O2250 mi

kondor19780726 [428]

Answer:

1 billion molecules O₂

Explanation:

From my research, a human red blood cell contains approximately 270 million hemoglobin molecules.

A hemoglobin molecule contains four heme groups, <em>each of which has an iron ion forming a coordination complex that carries every dioxygen molecule. </em>Therefore for each hemoglobin molecule, we will have 4 dioxygen molecules. The heme groups are responsible for the transport of every dioxygen and other diatomic gases.

Hence, the number of O₂ molecules in a red blood cell saturated with 100% will be:

$\frac{270 \cdot10^{6} hemoglobine molecules}{1 red blood cell} \cdot \frac{4 heme group}{1 hemoglobine molecule} \cdot \frac{1 O_{2} molecules}{1 heme group} = 1 \cdot 10^{9} O_{2} \frac{molecules}{red blood cell}$

So, the correct answer is 1 billion of O₂ molecules.

Have a nice day!

8 0

3 years ago

Luke and Sian want to plant a vegetable garden in their yard. A soil testing kit measures the soil pH at 5.0, but the lettuce th

dexar [7]

Answer:

So, Luke and Sian has to increase the pH of the soil by adding base to it.

Explanation:

The pH is defined as the negative logarithm of the hydrogen ion concentration in their aqueous solution.

$pH=-\log[H^+]$

With increase in hydrogen ion concentration the pH value decreases.
With decrease in hydrogen ion concentration the pH value increases.

The pH of the soil after testing it on a kit comes out be 5.0, but they both need pH of the soil to 6.5.

Comparison of pH of soil:

= 5.0 < 6.5

= High hydrogen ion concentration > High hydrogen ion concentration

So, Luke and Sian has to increase the pH of the soil by adding base .Doing so will decrease the hydrogen ion concentration in the soil (where as addition of acid lower the pH of soil).

4 0

3 years ago