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Chemistry
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Questions (96,964)
How many atoms are present in one formula unit of calcium hydrogen carbonate Ca(HCO3)2?
Could someone explain to me why the
5 answers
asked by
Cheezel
6,910 views
Propane (C3H8) burns in oxygen to produce carbon dioxide and water vapor. The balance equation for this reaction is C3H8 + 5O2
4 answers
asked by
Katie
7,747 views
Ionic bonds bond ions together(1 point)
because they share electrons with each other, pulling them together. because they connect
11 answers
asked by
Sans
229 views
Calculate the mass of strontium hydroxide required to make a 450-mL solution with a pOH of 4.00.
Step 1: Find pOH. I found that
4 answers
asked by
Anonymous
1,078 views
H3AsO4 reacts with water as follows:
H3aso4+h20<=>h2aso4- + h30+ The conjugate base of h3aso4 in this reaction is
4 answers
asked by
Anonymous
2,786 views
An atom in its ground state contains 18 electrons. How many of these electrons are in orbital with l = 0 values?
7 answers
asked by
sabelo
2,828 views
1. You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving
3 answers
asked by
David
1,617 views
A new element has been discovered and you are on the task force to determine where this new element will be placed on the
16 answers
asked by
Sarah PLEASE HELP MEEEEE
18,429 views
Which of the following statements about the pH scale is not true?
A. In a pH expression, the hydronium ions, H3O+, can be
4 answers
asked by
jessie
4,126 views
A 230.0mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning the solution is 1.50M. What
7 answers
asked by
Kim
11,764 views
a 20% solution of H2SO4 has a density of 1.14 g/mL. calculate the molarity, normality and molality of the solution.
5 answers
asked by
Anonymous
5,639 views
How do you calculate the PH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of 1.0 M sodium
5 answers
asked by
nicki
5,769 views
Determine the final volume of the solution if 0.783 grams of Na2CO3 is used to make a 0 348 M solution
Show all calculations
2 answers
asked by
Bonia
99 views
Which of the following solutions should be used when titrating a 25.00mL sample of CH3COOH that is approximately 0.1 M?
a.) 0.150
4 answers
asked by
jj re
1,671 views
Match the following states of matter with their descriptions of the particle motion
Column A 1. Gas: Gas 2. Liquid: Liquid 3.
1 answer
asked by
kali
219 views
Consider the following balanced equation.
2 H2 + O2 ---> 2 H2O Which of the following statements is false? a) One molecule of O2
5 answers
asked by
Sarah
4,278 views
36 g of HCl and 40 g of NaOH combine to form 58 g of NaCl. What is the amount of water produced in this process?
5 answers
asked by
Hii
1,238 views
The problem is: Calculate the standard free-energy change for the following reaction at 25 degrees Celsius.
2Au^+3(aq) + 3Cr(s)->
6 answers
asked by
Tiffany
14,218 views
A 0.456 gram sample of an unknown mono-
protic acid (let’s call it HZ) was dissolved in some water (you pick the amount). Then
4 answers
asked by
cheri
2,221 views
a 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp)
5 answers
asked by
Shanice
4,146 views
Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.
6 answers
asked by
Kelli
2,808 views
A gas-forming reaction produces 1.35 m3 of gas against a constant pressure of 143.0 kPa. Calculate the work done by the gas in
4 answers
asked by
christie
6,110 views
A 0.345g sample of anhydrous BeC2O4, which contains an inert impurity, was dissolved in a sufficient water to produce 100ml of
6 answers
asked by
michelle
6,894 views
what is the theoretical mole ratio- NaCl to NaHCO3
How do you determine the percentage error of an experimental mole ratio It
5 answers
asked by
CHEMISTRY HELP
7,164 views
C6H14 + Cl2 in UV light
Below are 5 products, say which one cannot be a product, prove this by showing how each of the other
4 answers
asked by
Ava
1,602 views
Write the balanced net ionic equation for the following chemical reaction: A solution of sodium dichromate, Na2Cr2O7, is added
5 answers
asked by
Sophia
5,271 views
What is the concentration of H+
in a solution of 0.2 M NaOH? i got [H+] = 5x10^-14, is this correct? all i did was [H+][OH-] = Kw
4 answers
asked by
Maria
1,688 views
For each of the following water-soluble compounds, indicate the ions present in an aqueous solution:
NaI K2SO4 NaCN Ba(OH)2
4 answers
asked by
Jacob
9,181 views
can anyone help with Unit 5 Sample Work Assignment Chemical Reaction Systems pls (:
5 answers
asked by
david
850 views
The Ksp of mercury II hydroxide is 3.60 x 10^-26. Calculte the solubility of this compound in g/L
9 answers
asked by
Anonymous
6,581 views
How many grams of solute are contained in 64.3 mL of 0.0238M KOH?
Do I convert 64.3ml to L=.0643L Multiiply .0643L and .0238M
5 answers
asked by
Suzanne
3,654 views
If 6.5g of zinc reacts with 5.0g of HCL,according to the reaction.Zn + 2HCL:zncl2+h2 Which substance is the limiting reaction?
15 answers
asked by
Ettefa Tirfessa
5,183 views
Use oxidation states to identify the element that is being oxidized in the following redox reaction:
Cu(s)+2 H 2 S O 4 (aq) →
4 answers
asked by
ivy
4,219 views
Consider the following reaction.
CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this
5 answers
asked by
Olivia
7,076 views
if molar enthalpy of vaporization of enthanol is 38.6 kJ/mol, how many moles of ethanol are vaporize when required heat is
5 answers
asked by
Paris
2,652 views
A dilute solution of sulfuric acid is added to 15g of copper and iron mixture. a) write the balanced equation for the occuring
10 answers
asked by
Maha
5,636 views
24 g of carbon and 32 g of oxygen combine to form carbon monoxide. What is the mass of the carbon monoxide formed?
5 answers
asked by
Hii
1,003 views
To 0.350L of 0.150M NH3 is added 0.150L of 0.100M MgCl2. How many grams of (NH4)2So4 should be present to prevent precipitation
7 answers
asked by
Angel
2,303 views
why don't water and benzophenone hydrogen bond? benzophenone has a C=O and water forms H bonds too.
3 answers
asked by
Chelsea
1,079 views
Due to the screening effect, the 3s electrons of magnesium (Mg) feel an effective nuclear charge (Zeff) of:
1. +1 2. +2 3. −2
5 answers
asked by
Bill
6,496 views
what is the freezing point depression when 153g of bromine is added to 1000g of benzene?
4 answers
asked by
melanie
915 views
Determine the pH of each of the following solutions.
0.21 M KCHO2 0.19 M CH3NH3I 0.19 M KI I'm not sure how i should set up the
4 answers
asked by
Kyle
11,136 views
Which of
I) HCl II) HF III) LiOH IV) HClO2 V) HNO3 are strong acids or strong bases in water?
6 answers
asked by
cheri
2,264 views
Which statements are correct for an endothermic reaction?
I. The system absorbs heat. II. The enthalpy change is positive. III.
5 answers
asked by
chirikamo
3,596 views
Which of the following contains the greatest number of particles?
A) 4g of helium gas B) 4g of oxygen gas C) 4g of hydrogen gas
5 answers
asked by
Cheezel Lim
3,146 views
How does the structure of atoms in a substance determine the substance’s conductivity?(1 point)
Responses If an atom’s outer
4 answers
asked by
meli
546 views
If 20 mL of 0.01 M aqueous HCl is required to neutralize 30 mL of an aqueous solution of NaOH, determine the molarity of the
5 answers
asked by
Emily
2,310 views
If the bunsen burner does not light after the gas outlet is opened, what might be wrong?
3 answers
asked by
anana
1,981 views
A solution of LiCl in water has XLiCl = 0.0800. What is the molality?
5 answers
asked by
jamiya
9,110 views
In a fission reaction, uranium-235 bombarded with a neutron produces strontium-94, another small nucleus, and 3 neutrons. Write
4 answers
asked by
Holly
7,192 views
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