i. Write the dissolution reaction of BaF2, including all states. (0.5 points)
BaF2←>Ba2+(aq)+2F-(aq)
ii. Write the expression for Ksp for BaF2. (0.5 points)
iii. Write the Ksp expression as an algebraic equation, using the variable x to represent concentrations. (1 point)
iv. Find the solubility of BaF2 by solving the equation you wrote in part iii. (0.5 points)
Answer:
See Explanation
Explanation:
i) The equation of the dissolution of BF2 is;
BaF2(s)⇄Ba2+(aq)+2F-(aq)
ii) Ksp =[Ba2+] [2F-]^2
iii) Let the concentration/solubility of [Ba2+] and [2F-] be x
Ksp = [x] [2x]^2
Ksp = 4x^3
iv) x =∛Ksp/4
calcium phosphate consists of two ions chemically bonded together. What are charges of each ion?
Answer: Ca^2+ and P^3-
Explanation:
How many atoms are needed to react with 50 grams of O2 gas
Answer:
3 moles
Explanation:
3 moles atoms are needed to react with 50 grams of O2 gas.
Explain the difference between mass and weight and
how they are measured.
MERE
Answer:
The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body. Mass is denoted using m or M.
Explanation:
the different between mass and weight is that the weight is the measure of the force of gravity on an object and the mass of an object will never change ,but the weight of an iteam can change based on its location
Which organelles appear to be associated with the nucleus of the animal cell
Answer:
The nucleus is surrounded by the endoplasmic reticulum, which is covered in spots by ribosomes.
Explanation:
When the animal cell divides, the nucleus breaks up, and the nuclear envelope falls apart.
In this chemical equation which of the following identifies the reactant(s)?
Answer:
2na+o2
Pls mark as brainliest
Answer:
A
Explanation:
2NA + 02
These are your reactants, which are always on the left side of the chemical equation.
hope this helped mark brainliest pls xx
What is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 J/(g·K), is heated from 25°C to 15°C?
A. 21 J
B. 0.21 J
C. 210 J
D. It is impossible to calculate without knowing the mass of the iceberg
Answer:
A. 21 J
Explanation:
Your temperature change is 10 degrees Celsius, or 10 Kelvin, it makes no difference either way.
Cp = 2.06 J/g•K
Multiply by the temperature change to just get J/g
2.06 J/g•K • 10 K = 20.6 J/g ≈ 21 J/g
21 J is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 J/(g·K) which is heated from 25°C to 15°C. So, the correct option is A.
What is Heat?Heat is defined as the energy that is transferred from one body to another as a result of a difference in temperature, when two bodies at different temperatures are brought together, the energy transferred is that of the hotter body which flows towards the colder body.
In this case, according to the equation for the calculation of the heat during a heating process
[tex]Q= mC (T_f- T_i)[/tex]
It is possible to calculate mass per gram of ice by dividing both sides by removing m from the equation, we plug in the given specific heat and final and initial temperatures to get:
[tex]Q= 2.06 \frac{J}{g degree C} [-15 Degree C- (-25 Degree C][/tex]
[tex]Q= 20.6\frac{J}{g}[/tex] which is equals to 21° C
21 J is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 J/(g·K) which is heated from 25°C to 15°C.
Therefore, the correct option is A.
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The half-life of 3H (H-3) is 12 years. About how long does it take for 127/128 of a sample of that radionuclide to decay? (Hint: this means only 1/128 are left)
A: 7 years
B:11.9 years
C:84 years
D:12.1 years
Answer:
i do believe its 7
Explanation:
Answer:84
Explanation:
Which is the formula for a binary ionic compound composed of
iodine and sodium?
a Ina
b Either INa or Nal is acceptable.
С
lodine and sodium do not form a binary ionic
compound.
d Nal
Answer:
D. Nal
Explanation:
Took a K12 test and it was correct! :3 Hope this helps!
type of ions do acids give off? hydroniumm hydrogen heliumhy dronium and hydrogen
Answer:
Substances that give H + 1 ion when dissolved in water are called acids
Explanation:
What is the empirical formula of a compound with a percent composition of 22.5% Phosphorous and 77.5% Chlorine?
Answer:
[tex]\boxed {\boxed {\sf PCl_3}}[/tex]
Explanation:
We are given the percent composition: 22.5% phosphorus and 77.5% chlorine.
We can assume there are 100 grams of this compound. We choose 100 because we can simply use the percentages as the masses.
22.5 g P 77.5 g ClNext, convert these masses to moles, using the molar masses found on the Periodic Table.
P: 30.974 g/mol Cl: 35.45 g/molUse the molar masses as ratios and multiply by the number of grams. [tex]22.5 \ g \ P * \frac {1 \ mol \ P }{30.974 \ g \ P}= \frac {22.5 \ mol \ P }{ 30.974} = 0.7264157035 \ mol \ P[/tex]
[tex]77.5 \ g \ Cl * \frac {1 \ mol \ Cl }{35.45 \ g \ Cl}= \frac {77.5 \ mol \ Cl }{ 35.45} \ =2.186177715 \ mol \ Cl[/tex]
Divide both of the moles by the smallest number of moles to find the mole ratio.
[tex]\frac {0.7264157035} {0.7264157035} = 1[/tex]
[tex]\frac {2.186177715}{0.7264157035}=3.009540824 \approx 3[/tex]
The mole ratio is about 1 P: 3 Cl, so the empirical formula is written as: PCl₃
A sample of gas has a volume of 12.0 L and a pressure of 2.00 ATM. If the pressure of gas is increased to6.00 ATM, what is the new volume of the gas
Answer:
4L
Explanation:
5. CFA 1.1 Explain how a rock and motor oil compare in their ability to be compressed.
Answer:h
Explanation:
G
If the sun output of solar radiation increased by 20% how would this impact the temperature of earth's mantle
Answer:
The temperature will not be affected directly
Explanation:
The solar radiation has a direct effect on the outer surface and inner part of the earth but an increase by 20% of the solar radiation will not cause the temperature of the Earth's mantle to increase because the factors that heat up the Earth's mantle are : Friction between core materials that sink into the center of the planet and Heat from decay of radioactive materials
Which statement describes how echolocation and ultrasound imaging are the same? They both use the absorption of sound waves. They both use the diffraction of sound waves. They both use the reflection of sound waves. They both use the transmission of sound waves.
Answer:
C.) They both use the reflection of sound waves.
Explanation:
Right on Edge
Answer:
C.) They both use the reflection of sound waves.
Explanation:
stay safe 2021
Because the triple beam balance is zeroed before it is put into use, it measures
A.
volume
B.
weight
C.
the effects of gravity
D.
mass
Which of the following statements is not true about the object moving with constant speed?
A. The object is not accelerating
B. The speed of the object is equal to zero
C. The distance travelled by the object increase uniformly
D. The speed of the object remains the same all throughout the travel.
Answer: B The speed of the object is equal to zero
Explanation:
HELPP asap I’ll mark you as brainlister!!!!!!
Heyy,
I hope that you're doing well today! :)
Can you help me please with my chemistry homework?
How are these two formulas called?
Thank youu
These are structural formulas of constitutional isomers of hexene, an alkene.
Both are acyclic, six-carbon chains, and they differ only in the position of the double bond. As constitutional isomers, both structures have the same molecular formula.
The first structure is of hex-1-ene (or 1-hexene).
The second structure is of (3E)-hex-3-ene [or (3E)-3-hexene].
Both structures have the molecular formula C₆H₁₂.
I hope I answered your question. Please feel free to let me know otherwise.
Science, please help and thank you!!
21. The formation of an ionic bond involves the a transfer of electrons. b. transfer of neutrons. c. transfer of protons. d. sharing of electrons.
Answer:
I think its C but if its not try A then
Explanation:
is an example of a solution that contains a dissolved substance
Answer:
An aqueous solution is water that contains one or more dissolved substances. The dissolved substances in an aqueous solution may be solids, gases, or other liquids.
What is the mass in grams of 4.8 moles of Calcium Hydroxide?
Answer:
355.2 grams
Explanation:
m = M×n= (40 + 2(16+1))×4.8= 355.2 (g)
What is the net ionic equation for the following reaction?
Rb2CrO4(aq) + 2AgClO(aq) --> 2RbClO(aq) + Ag2CrO4(s)
Group of answer choices
Rb+(aq) + ClO-(aq) --> RbClO (s)
2Rb+(aq) + CrO42+(aq) --> Rb2CrO4 (s)
Ag+(aq) + ClO-(aq) --> AgClO (s)
2Ag+(aq) + CrO42+(aq) --> Ag2CrO4 (s)
Calculate the calories of heat required to melt 35.0 g of ice.
Answer:
35.0g of ice at 0 degrees
Explanation:
Which of the following setups will correctly convert 36.45 grams of sodium to moles of sodium?
Answer:
D.
Explanation:
To convert from grams of a substance to moles of a substance, you use molar mass as a conversion factor. Sodium's molar mass is 22.99 grams per mole. To cancel out grams, you need to place grams on the bottom and moles on the top.
The urinary bladder is a muscular organ of the excretory system that collects urine excreted by the kidney. How does the nervous system help the urinary system in excretion?
Explanation:
it helps in when the kidney has used the needful nutrients been taken then the unwanted waste product it sends it to the nervous system then the nervous system passes the waste product to the bladder in form of urine
is Tungsten carbide an elementary substance
or compound?
Answer:
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms.
Answer:compound
Explanation:
When the equation
Na +
H2O → __H, +
NaOH
is correctly balanced using the smallest whole-number coefficients, what is the coefficient for H2O?
The balanced equation is 2Na + 2H[tex]_2[/tex]O [tex]\rightarrow[/tex] 2NaOH + H[tex]_2[/tex] and the coefficient of H[tex]_2[/tex]O is 2. Stoichiometry represents the number of coefficients.
What is balanced equation?An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, each sides of both the reaction have an equal balance of mass and charge.
It is typical that balancing chemical formulas for both charge and mass in aqueous solutions. Equal numbers and types of atoms are produced on both aspects of the equation when balancing for mass. When the charge is balanced, there is no net charge on either side of the equation.
The balanced equation can be written as
2Na + 2H[tex]_2[/tex]O = 2NaOH + H[tex]_2[/tex]
The coefficient of H[tex]_2[/tex]O is 2.
Therefore, the balanced equation is 2Na + 2H[tex]_2[/tex]O [tex]\rightarrow[/tex] 2NaOH + H[tex]_2[/tex] and the coefficient of H[tex]_2[/tex]O is 2.
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Can you build a fire on the moon? Why or why not?
Answer:
No.
Explanation:
We can't build a fire on the moon, because moon's atmosphere lacks oxygen.
[tex] \huge \pink{answer}[/tex]
No lightning of a fire on the surface of the moon is impossible..
[tex] \huge \green {reasons - }[/tex]
surface of the moon lacks oxygen which is important for the formation of fire.Surface of the moon doesn't have wind which disables the fire to burn rapidly.