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Maci
Questions (58)
A rectangle has an area of 3 squa·re feet and width-½ foot. What is the length of the rectangle?
1 answer
262 views
What independent reading selection have on as a reader? would you recommend your selection to a friend? why or why not answer.
I
5 answers
747 views
Why does it matter that math materials are either open-ended or self-correcting?
2 answers
1,736 views
In a school survey year 6 found that for every 4 girls there were 5 boys what is the ratio of girls to boys
1 answer
575 views
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
6 answers
4,169 views
How do I make this more positive?
Dear renter: Effective march 1, the rent for your parking space will go up $10 a month.
1 answer
843 views
how do varieties of informative and positive messages adapt the basic pattern?
1 answer
729 views
My teacher has assigned a project. I have to make a collage for Pip in Great Expectations. I have to use symbols that would
1 answer
485 views
give equations showing the commercial methods for preparations of the halogen (F2, Cl2, Br2, I2)
1 answer
935 views
a. describe the frasch processfor mining sulfur.
b. why must the water be superheated?
1 answer
414 views
describe what happens to sulphur as it is heated from room temperature to about 250 degrees c mention the various allotropes
1 answer
705 views
give five uses of phosphorus either as the acid or as one of its salts.
2 answers
432 views
what are the names of three important nitrogen fertilizers with their formulas?
1 answer
458 views
though both nitrogen and oxygen are diatomic gases, nitrogen is far less reactive than oxygen. Why?
1 answer
731 views
Differentiate between oxide, a peroxide, and a superoxide?
7 answers
701 views
write balanced equations of hydrogen with the following:
a. potassium b. fluorine c. sulfur
2 answers
626 views
write balanced equations of hydrogen with the following:
a. potassium b. fluorine c. sulfur
0 answers
477 views
what types of close packed unit cells do most metals assume?
0 answers
424 views
distinguish between aorphous and crystalline soilds and give an example of each
1 answer
360 views
which intermolecular forces would exist between molecules of:
a. H2S b. H2O c.O2 d. SiH4 e. HCl f. CH3Cl g. CO2 h. NH3
2 answers
830 views
which intermolecular forces would exist between molecules of:
a. H2S b. H2O c.O2 d. SiH4 e. HCl f. CH3Cl g. CO2 h. NH3
1 answer
971 views
which intermolecular forces would exist between molecules of:
a. H2S b. H2O c.O2 d. SiH4 e. HCl f. CH3Cl g. CO2 h. NH3
2 answers
698 views
explain the difference between hydrogen bonds and dipole dipole forces.
1 answer
466 views
how are intermolecular forces different from chemical bonds?
1 answer
426 views
what conditions must exist for a polyatomic molecule to be nonpolar?
1 answer
1,933 views
what shape would you expect a molecule to hove that was based on an atom with only two bonding pairs of electrons? Three bonding
2 answers
606 views
what shape would you expect a molecule to hove that was based on an atom with only two bonding pairs of electrons? Three bonding
0 answers
494 views
what do we mean when we describe a molecule as being polar?
2 answers
1,066 views
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.
2 answers
1,438 views
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
2 answers
758 views
if Ca and F atoms are allowed to react what will be the electron configurations and lewis structures of the resultant ions?
1 answer
2,196 views
if Ca and F atoms are allowed to react what will be the electron configurations and lewis structures of the resultant ions?
2 answers
936 views
A force of 20 Newtons gives a brick an acceleration of 5 m/s^2. What is the mass of the brick?
0 answers
478 views
what are some problems with regulatory agencies?
1 answer
452 views
what distinguishes the irs and osha from other regulatory agencies?
0 answers
500 views
How are intermolecular forces different from the forces that bond atoms together into molecules? How are they similar?
0 answers
595 views
why is it impossible to draw a distinction between natural substances and chemical substances?
2 answers
786 views
which element do not combine readily with other elements because they already have eight electrons in their outermost shell?
1 answer
518 views
why is it impossible to draw a distinction between natural substances and chemical substances?
0 answers
541 views
what are the three ceremonial functions of the president as chief of state?
1 answer
483 views
what is the foundation of the president's authority and influence?
1 answer
500 views
explain the importance of a president's character.
0 answers
388 views
Predict whether triangle s would be positive or negative for each of the following; give a reason for your answer.
1 answer
1,080 views
Arrange the following systems in order of increasing randomness or disorder(bring with the most ordered system)
1 mol liquid
2 answers
2,157 views
when triangle s (entropy) is positive does that mean that the disorder has increased or decreased? Explain
1 answer
515 views
how many joules of heat are needed to vaporize 50.0 g water at 100.0 C?
2 answers
2,248 views
how many joules of heat are needed to heat 900.0g water from 18.0 C to 98.0 C?
1 answer
1,037 views
How many joules of heat are required to melt 60.5g of ice at 0 degrees C?
1 answer
1,418 views
Propane(C3H8), the major component of LP game, is often used as heating and cooking fuels in homes. When propane is burned(
3 answers
1,536 views
sodium metal reacts violently with water to produce aqueous sodium hydroxide and hydrogen gas. calculate the enthalpy change for
5 answers
2,991 views
If the pressure on a balloon were quadrupled what would happen to the balloons volume?
3 answers
815 views
A sperm whale dives from the surface to great depths the air in its lungs progessively shinks until the lungs are completely
5 answers
1,259 views
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
6 answers
942 views
Why is it necessary to correct the pressure of a gas that is collected over water?
1 answer
469 views
Consider three gases: chlorine, freon-12, and radon. According to Grahams law of diffusion which gas would you expect to diffuse
1 answer
883 views
when calculating stoichiometric relationships in gas reactions using the combined gas law why is it important to convert the
1 answer
671 views
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
1 answer
947 views
What are the different types of seeds??(mustard,apples,etc)
1 answer
790 views
