01/10/18

How do bacteria in your instestines produce gas
how does bacteria in your intestines produce gas
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01/10/18

How do I solve this AP Chemistry problem?
A certain metal fluoride crystallized in such  a way that the fluoride ions occupy simple cubic Latrice sites, while the metal ions occupy the body centers of the half cubes. What is the formula of... more
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01/10/18

Helpppppppppp
Nicotine is a compound that contains C,H,N If a sample 2.50 g is burned in oxygen, 6.78 g CO2, 1.94 g H2O and 0.432 g N2 are the products of combustion. What is the percent coumpound of nicotine?
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01/10/18

Chemical Formulas and Naming Compounds
My teacher has assigned a worksheet in which I am given a substance's name, and I have to determine if the bond is ionic or covalent, but I don't know how to know. For example, I am given the... more
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01/09/18

Explain the answer in few lines
Can i tirate a solution of unknown concentration with other solution of unknown concentration and still get a meaningful answer
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01/09/18

warm air is less dense and rises above cold air
i need to learn cause i want to pass 6th grade a be an excellent student
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01/09/18

Dr. Scientist wants to decompose acetic acid (CH3COOH) into its component elements in order to produce 42 g of hydrogen. What mass of acetic acid should he star
Dr. Scientist wants to decompose acetic acid(CH3COOH) into its component elements inorder to produce 42 g of hydrogen. Whatmass of acetic acid should he start with?1. 6.3 × 102g2. Not enough... more
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01/09/18

Are People with anxiety disorders considered crazy?
if yes or no why
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01/09/18

the magnetic mineral iron oxide is called
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01/09/18

If I take 25 ml of milk of magnesia (80 mg/ml of Mg(OH)2) and to this I slowly add 25 ml of 0.1 N HCl what will be the final pH?
Milk of Magnesia has a documented pH of about 10.5 and indeed this is the pH I achieved experimentally when measuring with a pH meter. I have an excess of base 0.0171 moles vs 0.0025 moles of acid.... more
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01/09/18

Given the following equation, determine the amount of HCl (in grams) that is produced with 90.0 g FeCl3. 2 FeCl3 + 3 H2S → 6 HCl + Fe2S3
show all work
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01/09/18

In the thermite reaction, iron (III) oxide (Fe2O3) reacts with aluminum metal (Al) to form aluminum oxide (Al2O3) and iron metal (Fe). Find the ratio of iron (I
show the steps 
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01/09/18

What kinds of substances may form mixtures? What two properties Do all mixtures have?
It is about mixtures and solutions 
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01/08/18

If I dissolve a Rolaids tablet (550 mg CaCO3 and 110 mg Mg(OH)2) in 25 ml of water and then add 25 ml of 0.1M HCl, what will be the final pH?
Am doing an experiment on antacids and need to know pH of Rolaids tablet in water, followed by pH of mixture after HCl is added. 
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01/08/18

If I dissolve a Tums tablet(1000 mg of CaCO3) in 25 ml of water and then add 25 ml of a 0.1N HCl, what Is the pH of the mixture?
I know that CaCO3 isn’t very soluble in water. I crushed the tablet and added water to create a suspension. I then measured the pH and found it to be on average about 9. If I then add 25 ml of 0.1... more
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01/08/18

Calculate the average atomic mass of chlorine
Science 
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01/08/18

everything radioactive is dangerous
is it true or false  
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01/08/18

what is the average of 48 and 97
what is the average to 48 to 97
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01/08/18

What is the diff. Of hypertonic, hypotonic and an isotonic cell
I know abt. Isotonic etc. Types of solutions   But i searched over the books and the internet about it and i cant find a single info
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01/07/18

hypothesis testing
The following data are the oxygen uptakes (milliliters) during incubation of a random sample of 15 cell suspensions.14.014.114.513.211.214.014.112.211.113.713.216.012.814.412.9Do these data provide... more
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01/07/18

what is relation between free energy and eqllibrium constant
in equillibrium wha
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01/06/18

Choose from: Br2, H2, BeCl2, CCl4, CH4, H2O, CO2, PH3
a) which have AT LEAST one polar covalent bond b) that have only nonpolar bonds   Answers i have that might not be right:   a) H2O, CO2, BeCl2, CCl4 -i dont understand why should it be CO2,... more
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01/06/18

How many components are in the mixture of NaCl (aq) and NaCl (s)?
are there three when we count also the water or 2
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01/05/18

a smaller cell has grater surface area to volume ratio than a larger cell
im having trouble with the true and false maybe you can help me pleassssssssssssssssssssssssssssssssssssssssssssss  
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01/05/18

if Na is the avagadro number then the number of valence electrons in 4.2g of nitride ion is
Na
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