Maci

This page lists questions and answers that were posted by visitors named Maci.

Questions

The following questions were asked by visitors named Maci.

What are the different types of seeds??(mustard,apples,etc)

what is the partial pressure of N2 in the mixture of N2 and O2 having a total pressure of 1075 torr if the partial pressure of O2 is 720 torr?

when calculating stoichiometric relationships in gas reactions using the combined gas law why is it important to convert the volumes and pressure to STP?

Consider three gases: chlorine, freon-12, and radon. According to Grahams law of diffusion which gas would you expect to diffuse the fastest through a room? Which would diffuse slowest?

Why is it necessary to correct the pressure of a gas that is collected over water?

The reaction for the burning of one type of match tip is as follows: P4S3(s) + 8 O2(g)----> P4O10(g) + 3 SO2(g) What volume in L of SO2 at STP can be produced by the burning of 1.00 g P4S3 in excess O2?

A sperm whale dives from the surface to great depths the air in its lungs progessively shinks until the lungs are completely collapsed. when the whale ascends its lungs return to their former size. use boyles law to explain this phenomenon.

If the pressure on a balloon were quadrupled what would happen to the balloons volume?

sodium metal reacts violently with water to produce aqueous sodium hydroxide and hydrogen gas. calculate the enthalpy change for this reaction.

Propane(C3H8), the major component of LP game, is often used as heating and cooking fuels in homes. When propane is burned( reacted with oxygen), CO2(g) and H2O(g) are produced. 1) Write an equation for the reaction and calculate the enthalpy change for t...

How many joules of heat are required to melt 60.5g of ice at 0 degrees C?

how many joules of heat are needed to heat 900.0g water from 18.0 C to 98.0 C?

how many joules of heat are needed to vaporize 50.0 g water at 100.0 C?

when triangle s (entropy) is positive does that mean that the disorder has increased or decreased? Explain

Arrange the following systems in order of increasing randomness or disorder(bring with the most ordered system) 1 mol liquid ammonia 1 mol gaseous ammonia 1 mol solid ammonia

Predict whether triangle s would be positive or negative for each of the following; give a reason for your answer.

what is the foundation of the president's authority and influence?

what are the three ceremonial functions of the president as chief of state?

which element do not combine readily with other elements because they already have eight electrons in their outermost shell?

what are some problems with regulatory agencies?

if Ca and F atoms are allowed to react what will be the electron configurations and lewis structures of the resultant ions?

Predict what type of bonging predominates in each of the following. a. AsCl3 b. LiBr c. CuNi d. SO2 e. XeF6 f. Fe g. MnF2 h. HCN i. Al2O3 j. KCl k. O2 l. Cr

Tell whether the bonds between the following atoms are polar covalent or pure covalent bonds. a. Si-Si b. H-O c. C-H d. C-O e. Cl-F f. Cl-Cl g. N-H h. O-O

what do we mean when we describe a molecule as being polar?

what conditions must exist for a polyatomic molecule to be nonpolar?

how are intermolecular forces different from chemical bonds?

explain the difference between hydrogen bonds and dipole dipole forces.

which intermolecular forces would exist between molecules of: a. H2S b. H2O c.O2 d. SiH4 e. HCl f. CH3Cl g. CO2 h. NH3

distinguish between aorphous and crystalline soilds and give an example of each

Differentiate between oxide, a peroxide, and a superoxide?

though both nitrogen and oxygen are diatomic gases, nitrogen is far less reactive than oxygen. Why?

what are the names of three important nitrogen fertilizers with their formulas?

give five uses of phosphorus either as the acid or as one of its salts.

describe what happens to sulphur as it is heated from room temperature to about 250 degrees c mention the various allotropes encountered.

a. describe the frasch processfor mining sulfur. b. why must the water be superheated?

give equations showing the commercial methods for preparations of the halogen (F2, Cl2, Br2, I2)

My teacher has assigned a project. I have to make a collage for Pip in Great Expectations. I have to use symbols that would represent what he loved or feared while he was in The Forge, London, The Forge again, then to Cairo. Do you know of any symbols I c...

how do varieties of informative and positive messages adapt the basic pattern?

How do I make this more positive? Dear renter: Effective march 1, the rent for your parking space will go up $10 a month. However, our parking lot is still not the most expensive in town. Many of you have asked us to provide better snow and ice removal an...

You went to lunch with your friend and the bill is $19.00 your lunch is $3.00 more than your friends. How much was your friends lunch? f + 3 = 19; $8.00 3f + 2 = 19; $8.00 2f + 3 = 19; $8.00 2f - 3 = 19; $8.00 Mark weighs 74 pounds. together he and his si...

In a school survey year 6 found that for every 4 girls there were 5 boys what is the ratio of girls to boys

Why does it matter that math materials are either open-ended or self-correcting?

What independent reading selection have on as a reader? would you recommend your selection to a friend? why or why not answer. I really just need 6th-grade reading books recommended to me!Thank you in advance.

A rectangle has an area of 3 squa·re feet and width-½ foot. What is the length of the rectangle?

Answers

The following answers were posted by visitors named Maci.

I don't know how to explain it tho.

Ok but What volume in L of SO2 at STP can be produced by the burning of 1.00 g P4S3 in excess O2?

i don't see the example you gave me.

So just any random number I can quadruple it to?

So when the whale goes farther in the water the pressure increases and the volume of his lungs decreases. When the whale ascends, the pressure decreases and the volume of his lungs increases. Does that make sense?

I still don't get how to get the answer.

is it: Na + H2O -> ???? Hf is hafnium. i don't know this stuff.

i balanced the equation: 2 Na + 2 H2O = H2 + 2 NaOH. What delta Hf value am i suppose to look up?

whatever is easier!

Thank you so much!

Thank you again!

Thanks got it now!

I'm 16 and graduating in May. But im in advanced chemistry i don't know why but i am :) Thanks again.

Lauren: yes im graduating 2 years early Bob: that's the one i used!

144 = 2 * 2 * 2 * 2 * 3 * 3 2 to the 4th power and 3 to the 2nd power.

115=x(4+19)/2 115/11.5= 11.5x/11.5 x=10 Height= 10

Ok thank you so so much Damon. :)

@Ms.Sue can you help?

Thank you @Ms.Sue and @Writeteacher! I really appreciate it!

A rectangle has area 3 squa·re feet and width-½ foot. What is the length of the rectangle?

go to all your live lessons and participate in as much as possible and try to study for 30 mins a day and use progress learning and paper. GOOD LUCK