11/08/17

Are there any metals that have a lower density than 1.00?
Very random, but its kind of urgent.
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11/08/17

How many iron atoms reacted in iron (111) hydroxide
45 g sample of iron was used
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11/08/17

i am thinking of a number when i multiply it by 7 and subtract 38 i get 123. what is my answere
asafmnio.vy4hygvtoubyybouqvc9vbtn8vwrcuiocxenory8rtf98tr78n9r78oncfruopcrgf98rgv7ty
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11/08/17

A student borrows ​$6000 for tuition to be paid back at a simple interest rate of 5% in 3 months. How much does hehe pay back in 3 ​months?
A student borrows $6000 for tuition to be paid back at a simple interest rate of 5% in 3 months. How much does hehe pay back in 3 months?
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11/07/17

Changing Concentration
If 25 ml of creatinine (c4h7n3o) stock standard (conc= 1.0 g/dl) are diluted to 100ml to make an intermediate standard and then 15ml of the intermediate are diluted to 300ml to make a working... more
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11/07/17

The volume of sodium hydroxide solution used
The volume of sodium hydroxide solution used was 760.0 ml, and the concentration was 0.300 m . calculate the moles of sulfuric acid that were neutralized (assuming that the reaction goes to... more
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11/07/17

can you help me
uranium is used in nuclear reactors and is a rare element on earth. Uranium has three common isotopes. If the abundance of Uranium-234nis 0.01%, the abudndance of Uranium-235 is 0.71%, and the... more
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11/07/17

can you help me
uranium is used in nuclear reactors and is a rare element on earth. Uranium has three common isotopes. If the abundance of Uranium-234nis 0.01%, the abudndance of Uranium-235 is 0.71%, and the... more
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11/07/17

soda pop drank 3/8 of his water bottle yesterday. He drank 1/2 today. What fraction of water is left in his water bottle?
fraction question
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11/07/17

washing soda contains 43.4%sodium mass and 45.3% oxygen mass and one more element.If the molar mass of washing soda is 105.99g/mol, identify the other element .
I need help with this grade 11 chemistry question.
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11/07/17

how do non-lipid soluble hormones exert their effects?
It's hard for me to understand this question and find the answer to it. Please help!!!
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11/07/17

why do you think rust cannot form on other substances like plastic or rubber or even other metals like aluminum?
this question is about the types of atoms in chemical reaction
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11/07/17

what must steel wool be made of in order to rust?
this question is about the types of Atoms in a chemical reaction. 
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11/07/17

What is the enthalpy change for this reaction?
Ammonia, NH3 ( Hf=  –46.2 kJ), reacts with oxygen to produce water ( Hf= –241.8 kJ) and nitric oxide, NO ( Hf= 91.3 kJ), in the following reaction:
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11/07/17

5 moles of magnesium combine with excess chlorine gas to make magnesium chloride. How many moles of magnesium chloride are formed?
how would you set up and solve ? I’m still having trouble with stoichiometry! Any tips to help me later ? 
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11/07/17

isopropyl alcohol is mixed with water to produce a 37.0% (v/v) alcohol solution. how many milliliters of each component are presented in 835 mL of the solution?
assume that volumes are additive. need answer for mL alcohol and mL water
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11/07/17

it is desired to make a solution that is 3.0% by mass NaCl. if 160 g NaCl are available, what mass of solution can be prepared?
answer must be in grams
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11/06/17

CAN anybody help me with my biologiy homework
a heterozygous female with wavy hair marries a homozygous man with straight hair what will be the phenotype of their children? 
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11/06/17

a 7.35 L container holds a mixture of two gases at 55 degrees C. the particles of gas A and gas B, respectively, are 0.248 atm and 0.531 atm. *continued below
* if 0.150 mol of a third gas is added with no change in volume or temp, what will the total pressure become?
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11/06/17

Find Kc for the reaction
The following reaction was performed in a sealed vessel at 723 ∘C :H2(g)+I2(g)⇌2HI(g)Initially, only H2 and I2 were present at concentrations of [H2]=3.10M and [I2]=2.20M. The equilibrium... more
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11/06/17

how many grams of zncl2 will be produced from 22.0 g of Zn and 14.0 g of HCL
how many grams of zncl2 will be produced from 22.0 g of Zn and 14.0 g of HCL
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11/06/17

will mixing water with isopropyl alcohol give a different heat of vaporization than just isopropyl alcohol?
 will mixing water with isopropyl alcohol give a different heat of vaporization than just isopropyl alcohol's heat of vaporization?
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11/06/17

how many gallons of apple juice should you buy to serve 96 people 6 ounce servings each?
help  
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11/05/17

Calculate the change in pH when 41.0 mL of a 0.540 M solution of NaOH is added to 1.00 L of a solution that is 1.00 M in sodium acetate and 1.00 M in acetic
so I calculate the pH before adding NaOH which is 4.75 but I can't figure out the next step
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11/05/17

Can you help me with this atomic structure and periocity problem?
Calculate the longest and shortest wavelengths of light emitted by electrons in the hydrogen atom that begin in the n=6 state and then fall to states with smaller values of n.
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