(b) What is the solubility of lead chromate in moles per dmcube ksp
for PbC10,=2.8x10*-13 mole/dmº
The solubility of lead chromate : s= 5.29 x 10⁻⁷ mol/L
Further explanationGiven
Ksp for PbCl,=2.8x10*-13 mole/dmº
PbCrO4
Required
The solubility
Solution
P b C r O ₄ ( s ) ⇌ P b²⁺( a q) +C r O ₄ ⁻²( a q )
s s s
s= solubility
Ksp P b C r O ₄ = s²
K s p = [ P b ²⁺] [C r O ₄ ⁻² ]= 2.8x10⁻¹³
s = √2.8x10⁻¹³
s= 5.29 x 10⁻⁷ mol/L
How do sound waves travel? PLEASE HELP IF YOU WANT BRAINLEIST AND ME TO LIKE URE COMMENT!!
A. Sound causes the air near it to vibrate inwards.
B. waves radiate outward from a central point.
C. Sound moves randomly in different directions.
D. Sound transforms waves into different frequencies.
The answer is A. The vibration caused by the waves through the air eventually weaken, which is why sound diminishes easily over distance.
How are food webs and food chains related? HELP IF YOU WANT BRAINLEIST!!
Food webs only contain consumers.
Food webs consist of only one food chain.
Food webs are made of many food chains.
Food webs only contain producers.
Answer: Food webs are made of many food chains is the answer.
Explanation:
Food web consists many food chains.
Which two statements are true about all generators?
They convert motion energy to electric energy.
They have a fixed pair of magnets and a rotating metal coil.
They’re powered by fossil fuels.
They convert electric energy to motion energy.
They use the relative motion of a magnet and a coil of wire.
Answer:
they have a fixed pair of magnets and a rolling coil they convert motion into electric energy they are powered by fosile fuels they use reletive motion of a magnet and coil of a wire
Explanation:
Answer:
They convert motion energy to electric energy.
They use the relative motion of a magnet and a coil of wire.
Explanation:
This is the correct answer.
The atomic number tells the number of
Using the two cell reduction potentials shown for their corresponding reaction, calculate the cell potential for a voltaic cell made from these two systems.
Question 17 options:
A)
1.68 V
B)
–0.78 V
C)
0.78 V
D)
–1.68 V
Answer:
Theory- 1 to 7
Explanation:
Exercise- 8 to 25
ect
The right alternative is Option D (0.78 V).
According to the question,
By putting the values, we get
Cu+2 + 2e → Cu E = 0.52 V
Ag+1 + 1e Ag E° = 0.78 V
= 1.23 - 0.45
= 0.78.
Is cell potential negative or positive?negative
The standard cell potential is quite negative, so the reaction will not occur spontaneously as written.
Missing parts of the question.
Using the two cell reduction potentials shown for their corresponding reaction, calculate the cell potential for a voltaic cell made from these two systems: 0.78.
Cu+2 + 2e → Cu E = 0.52 V
Ag+1 + 1e Ag E° = 0.80 V
options:
A)
0.28 V
B)
–1.32 V
C)
1.32 V
D)
–0.28 V
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help please thank you
1
Give two reasons that show sugar is a compound
2
What is the difference between carbon (charcoal and suga? Compra ad 1
What happens at the anode in an electrolytic cell?
A. Turning an ion into an uncharged atom
B. Melting
C. Reduction
D. Oxidation
Answer:
D. Oxidation
Explanation:
In an electrolytic cell, oxidation (the loss of electrons) takes place at the anode. At the cathode reduction takes place.
A mnemonic technique that could be used is that the process that starts with a vowel (Oxidation) takes place at the place that also starts with a vowel (Anode).
A 275 g sample of a metal requires 10.75 kJ to change its temperature from 21.2 oC to its melting temperature, 327.5 oC. What is the specific heat of this metal
Answer:
[tex]c=0.127\ J/g^{\circ} C[/tex]
Explanation:
Given that,
Mass of the sample, m = 275 g
It required 10.75 kJ of heat to change its temperature from 21.2 °C to its melting temperature, 327.5 °C.
We need to find the specific heat of the metal. The heat required by a metal sample is given by :
[tex]Q=mc\Delta T[/tex]
c is specific heat of the metal
[tex]c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{10.75\times 10^3\ J}{275\times (327.5 -21.2)}\\\\=0.127\ J/g^{\circ} C[/tex]
So, the specific heat of metal is [tex]0.127\ J/g^{\circ} C[/tex].
Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid
Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid. a. This solid is ductile and conducts electricity.b. This solid is not conductive and has a low melting point.
Answer:
See explanation
Explanation:
A is a Metallic Solid
Let us look again at the physical properties of metals;
Metals are
DuctileMalleableSonorousHigh melting pointConducts electricityWe can now see that both ductility and electrical conductivity are metallic properties.
B is a Molecular solid
Molecules are formed when atoms share electrons. In molecules, there are no free electrons hence molecules do not conduct electricity.
Secondly, molecules are held together in the solid state by weak dispersion forces hence molecular solids have a low melting point.
Which term related to electromagnetism applies only to magnetic force
c5h12 compound name
QUESTION 4
How many significant figures are in the number 0.000020?
O A. 1
OB.2
O C.3
OD.4
Answer:
B) 2
Explanation:
There are two significant figures in given measurement,
2, 0
Significant figures:
1= The given measurement have four significant figures 1534.
2= All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
3= Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
4= Zero between the non zero digits are consider significant like 107 consist of three significant figures.
5= The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.
9. Which of these is not a mixture? *
Solution
Alloy
Amalgam
They are all mixtures.
Answer:
They are all mixture
Explanation:
last option
Is burning physical or chemical change?
Answer:
a chemical change
Explanation:
lighting a match is a chemical change. chemical reactions cause chemical change. in a chemical reaction two or more substances, called the reactants, form different substances called products. hope this helped :)
Write down the possible types of atomic
Orbitals of n=4
Answer:
2
Explanation:
because first shell ( k shell ) needs only 2 electron to complete its octet .
hope it helps
Will give brainliest
Find the molar mass of C3H60
Answer:
The molar mass and molecular weight of C3H6O is 58.0791.
Explanation:
Which is one piece of information that "9” gives about an atom of fluorine?
The atomic mass is different than the atomic number, and the number of neutrons is the difference between the atomic mass and the atomic number.
the atomic number
the atomic mass
the mass of protons
the number of neutrons
Answer:
The Atomic Number
Explanation:
GIVING OUT BRAINLIEST!!!!!!!!!
Which substance has the lowest specific heat?
O Beach sand
O
Beach water
O Ice
Pool water
A Gold ring is a what?
Element
Compound
Colloid
Alloy
Answer: Alloy
Explanation: gold is an alloy, or mixture of metals
Which is the weakest type of intramolecular force/bond?
a. Polar covalent b. Ionic c. Metallic d. Nonpolar covalent
Answer:
Non polar covlant
Explanation:
radiation is a measure of average kinetic energy of particles in an object true or false
Answer:false
Explanation:
A root is an example of a/an-
A: tissue
B: cell type
C:organ
D:organism
Answer: D an organism
Explanation:
Question 4
Being Left Handed is a recessive trait so it would be represented by two lowercase letters like (hh)
Your answer:
O
True
False
Answer:
True
Explanation:
What is the standard reduction potential, E, for the half-reaction Al(aq) +
3e→ Al(s)?
OA. -0.76 V
OB. -1.68 V
Oc. 2.37 V
OD. 2.71 V
SUBMIT
The standard reduction potential for the given question is-1.68 V, under the condition that the given half-reaction is Al(aq) +3e→ Al(s), then the required answer to the given question is Option B.
The standard reduction potential refers to the potential difference comparing the standard hydrogen electrode (SHE) and the half-reaction. The (SHE) possess a standard reduction potential of 0 V at all temperatures.
Hence, the standard reduction potential for the half-reaction Al(aq) + 3e→ Al(s) can be evaluated as follows
E°(Al₃⁺(aq) + 3e⁻ → Al(s)) - E°(H⁺(aq) + e⁻ → 1/2H₂(g))
= -1.66 V - 0 V
= -1.66 V
≈ -1.68 V
A half-reaction can occur for either the oxidation or reduction reaction component of a redox reaction. It projects the change in oxidation states of the substances involved. Half-reactions are applied to describe the processes in an electrochemical cell, in which one metal is oxidized at the anode and another metal is reduced at the cathode.
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Answer:
B
Explanation:
-1.68 V
(I will give a Brainliest)
How would you describe the change in the arrangement of particles as heat energy and
temperature increase?
(I will give a brainliest) State the relationship between phase changes and temperature
Answer:
The relationship is the "variation of vapour pressure with temperature" or " the effect of vapour pressure on the melting and boiling points in a phase"
A 4.0g Glass was heated from 5°C to 45°C after absorbing 32 J of heat. What is the specific heat of the glass? 
Answer:
[tex]c=0.2\ J/g^{\circ} C[/tex]
Explanation:
Given that,
Mass of a glass, m = 4 g
Initial temperature, [tex]T_i=5^{\circ} C[/tex]
Final temperature, [tex]T_f=45^{\circ} C[/tex]
Heat absorbed, Q = 32 J
We need to find the specific heat of the glass. The formula for the heat absorbed is given by :
[tex]Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{32\ J}{4\ g\times (45-5)^{\circ} C}\\\\=0.2\ J/g^{\circ} C[/tex]
So, the required specific heat of the glass is [tex]0.2\ J/g^{\circ} C[/tex].
