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chemistry
Page 4
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How could you describe the changes that happen when carbon changes form from graphite diamond
3 answers
asked by
Jamia
772 views
How do I solve this problem? What steps do I need to do to solve this question? It asked on paper, "You place a piece of paper
2 answers
asked by
ashley
201 views
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 25.2 g of carbon were burned in the presence of
1 answer
asked by
Alyssa
343 views
How many pounds does 22.1 in3 of gold weigh? (The density of gold is 19.3 g/cm3, 2.54 cm = 1 in, and 454 g = 1 lb.)
1 answer
asked by
phiby
277 views
Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)
The reaction mixture initially contains 22.55 g Fe2O3 and 14.78 g CO. Determine the limiting
2 answers
asked by
sara
577 views
determine the density g/mL for a plastic material weighs 2.68 lb and has a volume of 3.5 L
3 answers
asked by
Anonymous
768 views
determine the density g/ml for a 10.00-ml sample of oxygen gas has a mass of 0.01kg
1 answer
asked by
Anonymous
179 views
convert the total energy needed to convert 20g of ice at -100c to 60c
1 answer
asked by
chrisann brown
378 views
The half-life for the first order reaction of a substance A is 50.5 s. How much time is needed for the concentration of A to be
1 answer
asked by
Anonymous
241 views
Calculate the mass, in grams, of O2 that would be produced following the reaction of 72.36 grams of potassium chlorate (KClO3).
2
4 answers
asked by
valerie
280 views
Calculate the number of moles of O2 that would be needed to react with 38.9 moles of C8H18 .
2 C8H18(s) + 25 O2(g) → 16 CO2(g)
7 answers
asked by
valerie
228 views
3.00*10^8 M/S divided by 8.537*10^-7 M
1 answer
asked by
jack h nixon
123 views
which conclusion can be made about isotopes?
isotopes with more neutrons than protons are always unstable. isotopes that are
1 answer
asked by
anon
322 views
Calculate the mass, in grams, of oxygen in 1.619 moles of C12H22O11.
1 answer
asked by
lauren
232 views
The most common base is the
hydrogen ion; hydronium ion; hydroxide ion; ammonium ion.
1 answer
asked by
mohamed
177 views
Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in humans. The value of
1 answer
asked by
selvia
233 views
Calcium carbonate is heated in a test tube and it decomposes to produce CO2 that is collected over water in the following setup.
4 answers
asked by
anon
410 views
Can someone provide assistance for these chemistry homework problems?
1. Balance the following half-reaction: Fe(s) → Fe3+(aq)
1 answer
asked by
Dylan
341 views
You are studying the boiling points of liquids with some fellow students. You have two liquids of different molecular weights,
10 answers
asked by
Arizonaaaa
1,952 views
I am confused with these 2 questions can someone help me solve them?
1. If a current of 18.62 A flows for 18.15 hr, then how many
2 answers
asked by
Dylan
205 views
A mickey mouse balloon has a maximum volume of 10.0 liters. A little boy purchased a MM balloon at Disneyland. It has a pressure
1 answer
asked by
Alex
225 views
when 15 L of a 2 M solution is diluted to 25 L, what is the final concentration?
1 answer
asked by
slen
268 views
How many ton of chlorine and propene is consumed to produce one ton of Allyl chloride ?
2 answers
asked by
SHAHAB
221 views
A student is studying the boiling points of six different liquids and finds results with consistently higher boiling points than
4 answers
asked by
Anonymous
915 views
What are the answers to these three questions?
1. Consider the following half-reaction. 4H+(aq) + O2(g) + 4e- → 2H2O(l) Eo =
1 answer
asked by
Dylan
290 views
How do you do this?
Calculate the increase in the boiling point, ΔT, for a 0.53 m solution of sucrose (dissolves as a molecule)
1 answer
asked by
Dylan
281 views
Solid zinc sulfate and aqueous calcium acetate yield solid zinc acetate and aqueous calcium sulfate.
1 answer
asked by
Anonymous
218 views
MnO4^- and Cl
1 answer
asked by
olami
191 views
Consider the reaction: CO2(g) + H2(g) ↔ CO(g) + H2O(g), for which Kc = 0.64 at 900 K. If the initial CO2 and of H2 are each
3 answers
asked by
Areli
659 views
For a particular redox reaction, ClO−2 is oxidized to ClO−4 and Cu2+ is reduced to Cu+ . Complete and balance the equation
3 answers
asked by
JuEun
1,168 views
how many liters of hydrogen gas at STP are produced from the reaction of 50.0g of magnesium and 75g of hydrochloric acid?
1 answer
asked by
cayden
426 views
Nitrogen reacts with hydrogen to produce ammonia according to the following equation: N2(g)+3H2(g)→2NH3(g); ΔH=-92 kJ mol-1
3 answers
asked by
Beck
1,392 views
25cm3 of 3g hydrated trioxocarbonate (iv) solution (Na2Co3. xH20) per 250cm3 was neutralised by 13.20cm3 of 0.16M Hcl solution.
4 answers
asked by
Daniel
344 views
How many gold atoms are there in a pure gold ring containing 0.099 mol Au?
3 answers
asked by
Nada
323 views
Calculate the number of moles of sulfur in 57.1 g of sulfur. Note that molar mass of sulfur is 32.06 g/mol
3 answers
asked by
Nada
387 views
If a buffer solution is 0.100 M in a weak acid ( 𝐾a=4.9×10−5) and 0.440 M in its conjugate base, what is the pH?
4 answers
asked by
Drew
196 views
balance water iron(iii) chloride reacts with sodium hydroxide producing solid iron(III) hydroxide and sodium chloride
1 answer
asked by
salma
386 views
what causes corrosion and oxidation rust?
1 answer
asked by
Daniel
158 views
what are alloys and pure metals
2 answers
asked by
Daniel
221 views
Looking at the following claims properties of alloys are superior to the properties of pure metals.
I need to come up with a
1 answer
asked by
Daniel
306 views
How many moles of Sodium Nitrate are produced from 78.0 grams of Sodium Sulfide?
1 answer
asked by
sophia
179 views
A solid is decomposed in HCl, producing a gas. The product gas took 2.31 times as long to effuse as the same amount of CO2 under
1 answer
asked by
Emma
248 views
How is the flame test used to identify cations?
1 answer
asked by
Nada
178 views
Claim: Properties of alloys are superior to the properties of pure metals.
Using the claim i need to come up with scientific
1 answer
asked by
Jerry
222 views
What is the structure of C4H602
1 answer
asked by
wakfwen B daniel
174 views
Calculate the mass of NaCl present in 251 g of a 12.8 % NaCl solution
2 answers
asked by
pia
175 views
How many moles of magnesium are required to react 2.0 mol of hydrochloric acid in a single replacement reaction?
1 answer
asked by
Anush Patel
248 views
A student claims that the reaction of hydrogen and oxygen to form
water is evidence supporting the claim that mass is conserved
2 answers
asked by
Pleasehelpme
513 views
How many grams of HCl are needed to produce 100g of H2O
1 answer
asked by
Grecia Carlos-Oliveros
207 views
At standard conditions, how many grams of magnesium nitride is needed to make 100 liters of ammonia gas?
1 answer
asked by
Anonymous
238 views
What would happen if the concentration of O2 was decreased in the following reaction: 2H2 (g) + O2 (g) <--> 2H2O (l)
1 answer
asked by
Anonymous
224 views
What would happen if the concentration of O2 was decreased in the following reaction: 2H2 (g) + O2 (g) <--> 2H2O (l)
1 answer
asked by
Anonymous
146 views
according to your calculation, a reaction should yield 5.67 g of O2. What do you expect the volume to be at 24.0°C and 980 atm?
1 answer
asked by
baileigj
164 views
2AX+BY2–> BX2+2AY. if 2.2 moles of AX React with unlimited BY2 how many moles of BX2 are formed
1 answer
asked by
on the verge of tears
212 views
2Na + Cl2 - ?NaCI
In the reaction, sodium and chlorine combine to produce sodium chloride. In an instance when eight sodium
3 answers
asked by
.
358 views
You’re pushing an 84 kg shopping cart around the store. You’re in a hurry and pushing the cart at 9.3 m/s. How much kinetic
1 answer
asked by
heather
174 views
a sample of magnesium carbonate weighing 1 gram was made with the volume of 50 milliliters of nitric acid 0.2 n and needed to
1 answer
asked by
dante
198 views
The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 ppm
p p m by mass.
1 answer
asked by
Anonymous
125 views
Give the formula and charge of the oxyanion in each of the following compounds:
(a) Potassium sulfite (b) Sodium perchlorate (c)
3 answers
asked by
hetvi
313 views
Which solution will contain the higher concentration of hydroxide ions?
0.5 mol/L sodium hydroxide or 0.25 mol/L barium hydroxide
3 answers
asked by
celeste
179 views
Calculate the pH of a solution made by 1 L buffered solution of 0.635 M NH3 with the addition of 0.10 mol HCl (Kb for NH3 =1.8
1 answer
asked by
Hermione Granger
110 views
what is the PH of a buffer solution prepared using 0.010M HCOOH and 0.010M HCOONa? HCOOH = 1.7722 x 10-4
1 answer
asked by
derek
132 views
A solution is prepared by dissolving 5.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH). The freezing point of the
1 answer
asked by
asa
138 views
when aeraction the sign ∆H changed
N2+3H2=2NH3 ∆H =92.2
1 answer
asked by
meme
57 views
How is the mass number of an atom calculated?
0 protons plus neutrons 0 total number of electrons 0total number of protons 0
1 answer
asked by
bob the burger
127 views
Physical vs. Chemical change quick check
3 answers
asked by
alexis
164 views
what volume of 0.1mol/dm3 hydrochloric acid would be required to react completely with 1.50g of calciumtrioxocarbonate (4) salt.
1 answer
asked by
princess
86 views
What is the best definition of a bulk property?
A. A property that makes the amount of substance larger. B. A property of matter
1 answer
asked by
help pls
113 views
A side of a cube measures 2.00 cm. Its density is 7.86 g/mL. Calculate the mass of the cube.
1 answer
asked by
TuffTodd
85 views
Several compounds containing sulfur and fluorine are known.
Three of them have the following compositions: 1.188 g of F for every
1 answer
asked by
leva
131 views
SO2
1 answer
asked by
RAY
66 views
NA?
1 answer
asked by
wajeeha
66 views
Calculate the percent composition by mass of each element in NaClO3.
%Na= %Cl= %O=
1 answer
asked by
jr
81 views
which element on the periodic table are the least reactive
1 answer
asked by
nicole
52 views
Vinegar has a density of 1.0056 g/mL. What is the mass of 333 milliliters of vinegar?
1 answer
asked by
Anonymous
93 views
what does each unit measure
1 answer
asked by
Joey rossi
79 views
The half-life of oxygen-15 is 124 s. If a sample of oxygen-15 has an activity of 4000. Bq, how many minutes will elapse before
1 answer
asked by
cassie
65 views
List the total number of each type of atoms in the following reactants.
A) 2HCL + Ca(OH)2 B) 2Na3PO3 + 3Ca(NO3)2 This one is a
1 answer
asked by
d
116 views
how many kg of chlorine are in 23 kg of CF2Cl2
1 answer
asked by
jordan
111 views
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to
1 answer
asked by
brianna
101 views
Calculate the average atomic mass of a sample of a mixture of argon (Ar). The mixture is 90% argon-36 and 10% argon-38. Argon-36
1 answer
asked by
Reggie
154 views
what is not true about all forces?
1 answer
asked by
Fox
73 views
What is NOT TRUE about all forces?
A. They can be unbalanced B. They ALWAYS cancel each-other out C. They can cause objects to
1 answer
asked by
Fox
67 views
A random sample of carbon contains two isotopes: C-12 and C-13 with masses of 12.00 amu (5.00 %) and 12.99 amu (95.00 %)
1 answer
asked by
Fox
84 views
When 496.5 grams of Pb(NO3)2 reacts completely with KBr, how much will the
total mass of the products be? Explain your answer.
2 answers
asked by
Fox
128 views
The molar mass of hydrogen gas (H2) is 2 g/mol. The molar mass of oxygen gas
(O2) is 32 g/mol. When the reaction starts with 32
1 answer
asked by
Fox
103 views
When 496 5 grams of Pb(NO3)2 reacts completely with KBr, how much will the
total mass of the products be? Explain your answer
1 answer
asked by
Fox
162 views
When 496 5 grams of Pb(NO3)2 reacts completely with KBr, how much will the
total mass of the products be? Explain your answer
1 answer
asked by
Fox
80 views
What is the molar mass of phenol (C₂H5OH)? The atomic masses of C, H and O
are 12.0, 1.01 and 16.00 amu respectively. O 94.1
1 answer
asked by
Fox
130 views
Please Help!
What is the molar mass of phenol (C₂H5OH)? The atomic masses of C, H and O are 12.0, 1.01 and 16.00 amu
1 answer
asked by
Fox
80 views
What is the mass in 3.00 x 10 23 units of calcium chloride, CaCl₂? *
O 1.05 g O 79.5 g O 54.8 g O100 g
3 answers
asked by
Fox
109 views
What is the mass in 3.00 x 10 23 units of calcium chloride, CaCl₂? *
1 answer
asked by
Fox
175 views
How many atoms of sulfur are in a 2.500 mole sample of pure sulfur? *
O 1.505 x 10 24 O 5.69 x 10-24 O 110. O 1.20 x 1024
1 answer
asked by
Fox
115 views
How many atoms of sulfur are in a 2.500 mole sample of pure sulfur? *
3 answers
asked by
Fox
105 views
When the following equation is balanced, what is the coefficient in front of the
HCI? HCI + CaCOS → CaCl₂ + CO₂ + H₂O o 1
1 answer
asked by
Fox
79 views
When the following equation is balanced, what is the coefficient in front of the
HCI? HCI + CaCOS → CaCl₂ + CO₂ + H₂O
1 answer
asked by
Fox
73 views
In the image below, there are eight samples of different ELEMENTS. Each sample
is exactly 1 mol. Why are the masses of each
1 answer
asked by
Fox
80 views
The molar mass of hydrogen gas (H2) is 2 g/mol. The molar mass of oxygen gas
(O2) is 32 g/mol. When the reaction starts with 32
1 answer
asked by
Fox
111 views
Assume a reaction takes place in a basic solution to form the given products:
MnO4–(aq) + Cl–(aq) MnO2(s) + Cl2(g)
1 answer
asked by
alani marrujo
107 views
calculate the mass of calcium chloride (ca12)that can be obtained from 25g of lime stone (caco3)in the presence of excess
1 answer
asked anonymously
91 views
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