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Chemistry
Page 27
Questions (96,300)
Determine the concentration of iron in an aqueous solution containing 0.2810 grams of Fe(NH4)2(SO4)2 per liter of solution.
4 answers
asked by
jenine
600 views
1) Copy and complete:
Two particles can react together only if they …… and the …… has enough …… to be ……. 2) What
5 answers
asked by
fiyin
1,339 views
Carbon dioxide gas and liquid water form solid glucose (C6H12O6) and oxygen gas during photosynthesis. Chlorophyll absorbs light
3 answers
asked by
Ceamus Angelina
3,324 views
How many grams of a solid mixture containing strontium chloride would one need to make 558 mL of a 0.100 M strontium chloride
4 answers
asked by
Anonymous
2,293 views
HA and HB are two strong monobasic acids. 25cm3 of 6moldm-3 Ha is mixed with 45cm3 of 3moldm-3 HB. What is the H+ concentration
3 answers
asked by
zainab
1,390 views
Calculate the value of the solubility product (Ksp) for CdS given the following standard reduction potentials:
CdS + 2e- --> Cd +
1 answer
asked by
Andrew
1,168 views
Find the expression for the solubility product of silver oxalate Ag2C2O4).
2 answers
asked by
Anonymous
1,112 views
How many pi bonds and sigma bonds are present in ritalin?
3 answers
asked by
Ryan
1,094 views
Calculate the average C—C bond strength in cyclopropane (in kJ/mol). Its combustion and the experimental enthalpy of reaction
1 answer
asked by
JUNDY
1,071 views
How does a balanced chemical equation demonstrate the Law of Conservation of Mass?
it shows that the properties of the elements
1 answer
asked by
annoymous
68 views
A student compiled data in a table to compare pure substances and mixtures.
Pure substances: Elements and compounds cannot be
1 answer
asked anonymously
79 views
An element x has a relative atomic mass of 88. When a current of 0.5 ampere was passed through the fused chloride of x for 32
1 answer
asked anonymously
24 views
Elizabeth was studying physical and chemical properties and created the table below to help her. Which property and example does
1 answer
asked anonymously
40 views
Which gas has recently increased in the mesosphere, creating a rise in water vapor which has led to the formation of
1 answer
asked by
M
21 views
How many neutrons are in the atom shown below?
(1 point) Responses 30 30 55.845 55.845 82 82 26
1 answer
asked anonymously
23 views
5 of 145 of 14 Items
Question If the amount of carbon dioxide (CO2) in a workplace is greater than 1,000 parts per million (ppm),
1 answer
asked by
A n I m e*
30 views
Why is copper considered to be a very valuable natural resource?(1 point) Responses Copper conducts electricity well so it can
1 answer
asked anonymously
41 views
Below is a picture with 4 different flasks. Which picture shows a flask containing a homogeneous mixture.
(1 point) Responses
1 answer
asked anonymously
81 views
Using the information from the Periodic Table of Elements, identify the correct numbers of subatomic particles for one atom of
1 answer
asked anonymously
18 views
Select the diagram that correctly illustrates a mixture of oxygen, O2, and nitrogen, N2, gases.
(1 point) Responses a b c d Skip
1 answer
asked by
ANSWER CORRECTLY
101 views
Sharon combines potassium (K) and water (H2O), producing potassium hydroxide (KOH) and hydrogen(H2), as shown in the chemical
1 answer
asked by
icky^33
49 views
Katie found a sample of an unknown solid. She performed a series of experiments to determine some of its properties. Her
1 answer
asked by
dee
44 views
A person mixes two liquids together as shown in the illustration below.
Clear Yellow solid Substance X Mass 150 g Substance Y
3 answers
asked by
Cupidsvz
50 views
A person mixes two liquids together as shown in the illustration below.
The person can conclude that there was a chemical change
1 answer
asked anonymously
86 views
There are 3 unknown substances A, B, and C that need to be classified as element, mixture or compound.. Substance A can be
1 answer
asked anonymously
23 views
Sasha does an experiment that involves burning an 8 gram strip of magnesium metal in an open flame. After the experiment Sasha
1 answer
asked by
@~@
53 views
All the statements about metals are accurate except
a. metals are good conductors of heat and electricity b. metals are ductile
1 answer
asked anonymously
21 views
Use the provided figure to answer the question below.
Using the information from the Periodic Table of Elements, identify the
1 answer
asked by
hi :)
21 views
Use the periodic table of elements below to answer the following question.
A scientist has compiled the table below to show the
1 answer
asked by
hi :)
30 views
Name the product at the anode and cathode when a dilute solution of sodium chloride is electrolysed.
1 answer
asked by
Feri
10 views
Use the chemical equation to complete the activity.
2Cu+S→Cu2S Copper (Cu) reacts with sulfur (S) to form copper sulfide as
1 answer
asked by
anon
32 views
What is the solubility of x in mol dm if 25cm of it's saturated solution contains 4.og of x?(x=60g mol)
1 answer
asked by
Ayomide
218 views
10.50g of KNO3 salt saturated 5g of KNO3 salt at the same temprate in (a.) grammes per dm3 (b.)moles per dm3
1 answer
asked by
Caleb
233 views
O2 gas is slightly soluble in water: How does this affect the reported moles of KCIO3 decomposed in the mixture? Explain
a When
1 answer
asked by
Ali
219 views
If an air bubble accidentally enters the gas collecting test tube, how would this affect:
a. The reported number of moles of
1 answer
asked by
Ali
233 views
A scientist studies the bond energies of different compounds containing nitrogen (N). The scientist observes that the N–N
1 answer
asked by
no
258 views
how many mL of a .25 M HCL would be required to neutralize completely 30mL of a .2 M Ca(OH)2
1 answer
asked by
samantha
377 views
whta are the products of electrolysis of the following solutions?
potassium iodide nickel sulphate and magnesium chloride
1 answer
asked by
Anonymous
396 views
If 25cm^3 of NaOH sol containing 4.0g per litre of sol neutralised 50cm^3 of a monobasic acid,HX containing 1.8g of
1 answer
asked by
lucy
404 views
Aqueous solutions of lead nitrate (Pb(NO3)2) and sodium iodide (NaI) are mixed. Consult the solubility rules to predict the
2 answers
asked by
khanyisile Maxhalanga
120 views
Volume of acid is 20.30cm3 of hydrochloride was tertired against 25cm3 of 0.1 NaOH solution. Calculate the concentration of the
1 answer
asked by
FAHAT
81 views
helium gas, 3x10-4g, is dissolved in 200g of solution. Express this concentration in parts per million.
4 answers
asked by
Anonymous
75 views
Name two metals which will not liberate hydrogen form dilute tetraoxosulphate (vi)
1 answer
asked by
Nicola
64 views
When 1mol of a gas burns at constant pressure, it produces 2418 J of heat and does 5 kJ of work.
Part A Identify ΔE for the
1 answer
asked by
arielle
79 views
An electrochemical cell is based on these two half-reactions:
Ox: Sn(s) → Sn2+(aq, 1.74 M) + 2 e- Red: ClO2(g, 0.120 atm) + e-
4 answers
asked by
Anonymous
5,247 views
C4H4 (g) + 2 H2 (g) --> C4H8 (g)
Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon
5 answers
asked by
Jayd
12,142 views
on chemical scale, the relative mass of the isotopic mixture of x atoms (x^20,x^21,x^22) is approximately equal to:(x^20 has 99
6 answers
asked by
veer
2,416 views
Can anyone help me with this question
How much NaCl should be added to 0.35 L of a 0.15 M solution of AgNO3 so that it reacts
5 answers
asked by
William
3,070 views
Explain why solution turns blue by referring to the relative strength of oxidising agent?
5 answers
asked by
Xalati
1,686 views
Standardization of the Sodium Thiosulfate Solution
Make up a standard solution of potassium iodate by accurately “weighing by
5 answers
asked by
Sara
9,540 views
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