help please
Assuming that the trends continue, which of the following compounds do you predict will have the GREATEST solubility at 120°C?
A.
Ce2(SO4)3
B.
K2Cr2O7
C.
Pb(NO3)2
D.
NaCl
Answers
Answer:
K2Cr2O7
Explanation:
Solubility refers to the amount of substance that dissolves in a given mass or volume of solvent. There are several units of solubility applicable in different areas.
Solubility is dependent on temperature. The solubility curve is a graphical representation of the dependence of solubility on temperature for different chemical species.
If we study the solubility curve closely, we will see that K2Cr2O7 has the highest solubility at 100°C. This means that if the trends continue, this substance will also have the highest solubility at 120°C.
Answer: c
Explanation:
Related Questions
answer truthfully:))
Answers
Answer:
b) velocity.
c) velocity, m/s²
d)change in velocity, change in direction, change in both velocity and direction.
e) increasing or decreasing
What are the protons neutrons and electrons of Vanadium-52 +3 charge
HELP
Answers
Answer:
Protons: 23
Neutrons: 28
Electrons: 23
I THINK
Explanation:
8. Shanice made a list about alkali metals.
Alkali Metals
Jose one electron
are found in
group one
include elements
Li, Na, and K
ions will have a
negative one
charge
Shanice made a mistake on her list. Which
best describes the mistake Shanice made?
A. Alkali metals do not lose one electron,
they gain one electron
B. Alkali metals are not found in group one;
they are found in group two.
C. Alkali metals do not include elements Li.
Na, and K, they include Al, Si, and P.
D. Alkali metal ions will not have a negative
one charge; they will have a positive one
charge
Answers
Answer:
D. Alkali metal ions will not have a negative one charge; they will have a positive one charge
Explanation:
Alkali metals are a found towards the left hand side of the periodic table. The comprise of Li, Na, K, Rb, Cs and Fr.
They form univalent positive ions such as Cs^+, Na^+ etc. They do not form negative ions but give out one electron to form the sort of ions stated above. Recall that metals are electropositive in nature (donate electrons).
The mistake made by Shanice is to say that group 1 elements have a negative one charge.
The first asteroid to be discovered is Ceres. It is the largest and most massive asteroid is
our solar system’s asteroid belt, having an estimated mass of 3.0 x 1021 kg and an orbital
speed of 17900 m/s. Determine the amount of kinetic energy possessed by Ceres.
Answers
Answer:
kinetic energy possessed by Ceres = 4.806 × 10^(29) J
Explanation:
We are given;
Estimated mass; m = 3 × 10^(21) kg
Orbital speed; v = 17900 m/s
Formula for kinetic energy is;
K.E = ½mv²
K.E = ½ × 3 × 10^(21) × 17900²
K.E = 4.806 × 10^(29) J
Thus;
kinetic energy possessed by Ceres = 4.806 × 10^(29) J
Matches=from Chemical energy to light energy+heat energy
Answers
Explanation:
A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.
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The unbalanced basic equation for the reaction in most airbags is NaN3 --> Na + N2.
A normal airbag needs about 67 liters of Nitrogen gas to fully inflate. (At STP: 1 mole of gas = 22.4 liters of that gas.) How many grams of reactant is needed to produce that amount of gas?
Answers
Answer:52!
Explanation:
Organisms that need nitrogen to survive are
all living organisms.
only animals.
only bacteria.
only plants.
Answers
Answer:
Correct option is
A) all living organisms
animal,plant,bacteria somehow everybody is dependent on nitrogen same as oxygen!
Which of the following preparation of salt is incorrect? *
Acid + alkali
Acid + hydrogen
Acid + carbonate
Acid + metal oxide
Answers
Answer:
acid + hydrogen
Explanation:
gives a good combination
Compare and contrast a driver of a car and truck, and list defensive driving no links
Answers
Answer:
These defensive driving skills can help you avoid the dangers caused by other ... being aware of the cars around you, checking your mirrors — the list goes on. ... It's not just teen drivers who are at fault: People who have been driving for a while ... car and a slow-moving truck in the same lane, it's a pretty sure bet the driver ...
Explanation:
Which of the following diatomic gases has the shortest bond between its two atoms?
A. HI
B. O2
C. CI2
D. N2
Answers
Which is not a critical part of collision theory?
orientation
energy
amplification
collisions
Answers
Answer:
Amplification
Explanation:
The heat absorbed or released of a reaction at a constant presser is the same as the change in enthalpy
Answers
Answer:
HAT IS THE QUESTIN? hehehe
Explanation:
lol
5. (10 Points) To calculate the heat released in the reaction you used the formula
q=cmAT. What do each of the symbols represent in the this formula?
Answers
Explanation:
To calculate the heat released in the reaction, we use the formula-
Q = m×c×Δt
Where
Q - The heat energy
m - the mass of the object/substance being heated
c - the specific heat of the object/substance being heated
Δt - the change in temperature in °C
Which compound is produced by a neutralization?
H2O(l)
HNO3(aq)
H3PO4(aq)
Ca(OH)2(s)
Answers
Explanation:
HNO3(aq) is the compound produced by a neutralization
Please help me on this!!
Answers
Answer:
OK
Explanation:
OK
How is a less-intense wave different from a more-intense wave?
Answers
Answer:
A less-intense wave will have fewer decibels than a more-intense wave.
Explanation:
sound is measured in units called decibels (dB). The higher the decibel level, the louder the noise. On the decibel scale, the level increase of 10 means that a sound is actually 10 times more intense, or powerful.
What would happen to an impulse if a neuron cannot produce chemicals at a synapse?
Answers
Answer:
Explanation: he axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. ... The binding allows the nerve impulse to travel through the receiving neuron
what do you get if oceanic plates are moving away from one another
Answers
Answer:
Explanation:
When two plates are moving away from each other, they are called a divergent plate boundary.Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere.
Helped by none other than the #Queen herself!
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Answers
Answer: Hey I am sure you will do great just try your best
Explanation:
0.75 moles of an unknown acid are dissolved in water. If 0.42 moles of H3O+ form, what was the percent dissociation of the unknown acid?
Answers
Answer:
56 %
Explanation:
The percent dissociation of a weak acid can be defined as:
Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%
We are given all the required data to calculate the percent dissociation:
0.42 mol / 0.75 mol * 100 % = 56 %
The percent dissociation is 56%.
Which of the following actions decreases the entropy of a system?
A-mixing baking soda and salt
b- freezing water
c- dissolving salt in water
d-boiling water
Answers
Answer:
b- freezing water
Explanation:
Solid<liquid<gas is the general rule for entropy increase
Freezing water would change the phase from liquid to solid which would lead to less entropy
what type of bonding is occuring in the compound below?
Answers
Answer:
D.Metallic
Explanation:
The metallic model is often characterized as a "sea of electrons". This is because the electrons delocalize from the ion's orbitals, allowing them to roam freely around the substance. This is what the model is showing.
If this helped, a brainliest would be greatly appreciated!
1. A mixture of 3 gases (A, B, and C) has a total pressure of 240kPa. If the partial pressure of
Gas A is 107 kPa and the partial pressure of Gas B is 55 kPa, what is the partial pressure of
Gas C?
Answers
Answer:
78 kPa
Explanation:
The total pressure is the sum of the partial pressures:
240 = Pa + Pb + Pc
240 = 107 + 55 + Pc
Pc = 78 kPa
Answer:
78 kPa
Explanation:
Bases and acids are _
A. Mixtures
B. Gases
C. opposites
D. The same
Answers
Answer:
opposite
Explanation:
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At equilibrium, the amount of product is equal to amount of reactant
True o False
Answers
Write and balance the following reaction: Hydrogen gas reacts with oxygen gas to form water.
Answers
Answer:
[tex]2H_2 + O_2 -> 2 H_2 O[/tex]
The process of an element breaking down over time, allowing geologists to get the absolute age is called _________.
Answers
Answer:
radioactive decay
Explanation:
Which two compounds of oxygen are small molecules?
Explain why metals conduct electricity. Refer to structure and bonding in your answer
Answers
Answer:
They are electrical conductors because their delocalised electrons carry electrical charge through the metal.
Explanation:
for the second ques
not sure...
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3. Which side of the chain should you count from when naming organic compounds?
A) Center
B) Right side
C) Side that will give you the longest Carbon chain
D) Left side
4. What is the pH of a solution with a pOH of 10?
A) 6
B) 14
C) 4
D) 10
Answers
Answer:
3. Which side of the chain should you count from when naming organic compounds?
C) Side that will give you the longest Carbon chain
4. What is the pH of a solution with a pOH of 10?
C) 4
pH + pOH = 14
pH + 10 = 14
pH = 14 - 10
pH = 4
-TheUnknownScientist
what are 5 reason masks are important for the virus
Answers
They prevent asymptomatic spread. ...
You're protecting others from illness. ...
They're mandated by law in some states. ...
They're good hygiene in general.
Answer:
they reduce viral transmission
They prevent asymptomatic spread
You're protecting others from illness.
They're mandated by law in some states
They're good hygiene in general