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Free_Kalibri [48]
4 years ago
7

Can someone answer this question

Chemistry
1 answer:
maksim [4K]4 years ago
5 0
I will try to answer ok?
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I NEED HELP FAST!!!!! Can you tell me about the difference between the arrangement of particles in each state of matter??? I hav
Natasha2012 [34]
Gas are well separated with no regular arrangement<span>. liquid are close together and solid are right on-top of each other packed tightly</span>
4 0
3 years ago
A 10.00 g sample of a compound containing only carbon, hydrogen, and oxygen forms 23.98 g CO2 and 4.91 g H2O upon complete combu
yanalaym [24]
We can determine the empirical formula by first converting each of the grams to moles. remember to do this, first, we need the molar mass of the molecules which can be calculated by adding the mass of the atoms from the periodic table. 

molar mass of CO2= 44.0 g/mol
molar mass of H2O= 18.02 g/mol

now, lets determine the grams of each atom

Carbon: 23.98 g x (12.011 g / 44.01 g) = 6.54 g C

Hydrogen: 4.91 g x (2.0158 g / 18.02 g) = 0.55 g H

Oxygen: 10.0 - (6.54 + 0.55) = 2.91 g O

Now let's convert each mass to moles.

C: 6.54 g / 12.01 g / mol = 0.54 mol
H: 0.55 g / 1.01 g/mol = 0.54 mol
O: 2.91 g / 16.00 g/mol = 0.18 mol

now that we have the moles of each atom, we need to divide them by the smallest value to find the ration. If you do not get the whole number, you need to multiply until to get a whole number.

C:  0.54 mol / 0.18 mol = 3
H:  0.54 mol / 0.18 mol = 3
O: 0.18 mol / 0.18 mol = 1

empirical formula--> C₃H₃O



4 0
4 years ago
What information does DNA provide to all of the cell's organelles
mr_godi [17]

It gives each organelle in the cell its own specific function

4 0
3 years ago
Read 2 more answers
A sunscreen preparation contains 2.50% benzyl salicylate by mass. If a tube contains 4.0 oz
antoniya [11.8K]

About 0.92 kg of benzyl salicylate would be needed in order to manufacture 325 tubes of sunscreen.

A tube contains 4.0 oz of the sunscreen and each one 2.5% benzyl salicylate.

         2.5% of 4.0 oz = 0.1 oz

Thus, each tube would need 0.1 oz of benzyl salicylate.

325 tubes of the sunscreen is needed and each one requires 0.1 oz of benzyl salicylate. Hence, total amount of benzyl salicylate needed would be:

    325 x 0.1 oz = 32.5 oz

From conversion:

16 oz = 1 lb

Hence,

32.5 oz = 32.5/16

                        = 2.03 lb

Also:

2.205 lb = 1 kg

2.03 lb = 2.03/2.205

             = 0.92 kg

More on dimensional analysis can be found here: brainly.com/question/22015862

6 0
3 years ago
The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2CrO3(s) + 3Si(s)----&gt; 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
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