Answer:
Ca3(PO4)2
Explanation:
Ca3(PO4)2 or calcium phosphate is insoluble in water.
How many atoms are in 0.256 mol Fe?
For this one, you can use the formula:
# of atoms = # of moles * Avogadro's number
# of atoms = (0.256 mol) * (6.02 * 10^23)
# of atoms = 1.54 * 10^23 atoms
Hope It helped you!
Atoms are the smallest unit of molecules. In 0.256 mol of iron, there are 1.54 × 10²³ atoms.
What are atoms?Atoms are small entities of the compound or the molecule that can be measured by Avogadro's number. The number of atoms can be given as the product of the moles and the Avogadro's number.
If 1 mole of iron = 6.02 × 10²³
Then, 0.256 moles = 0.256 × 6.02 × 10²³
Therefore, 1.54 × 10²³ atoms of iron are present in 0.256 moles.
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Why is boiling water a physical change
Answer:
it is cleaning the water and heating it
Answer:
When boiling the water, the water will begin to evaporate and thats the physical change.
What is a coefficient?
Answer:
in math it's " a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4x y)."
In physics " a multiplier or factor that measures some property."
Explanation:
hope this is helpful!
Answer:
A coefficient is the number before a variable
Explanation:
A numerical or constant quantity placed before and multiplying the variable in an algebraic expression
When the moon is in between the earth and the sun it is a
lunar eclipe is the answer
Answer:
solar eclipse
Explanation:
When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon.
h-h+cl+cl____2h-cl... calculate the energy needed to break the bond
The temperature is -20C. If the temperature rises by 15 oC, what is the new temperature?
Answer:k c;kz;dvk
fs;fksef ;;
Explanation:
;kk;dkf;vkd; kk
The molar mass of a sulfur molecule (S8) is
Explanation:
The molar mass of a sulfur molecule (S8)= 256g
Answer:
The Sulfur molecule has eight sulfur atoms thus the molar mass will be eight times the mass of one sulfur atom.
The atomic mass of S: 32.065
Molar mass= 8*32
= 256u
An insecticide kills many insects, but a few survive. Because of natural selection, which of the following is most likely to happen
1- Eventually the survivors will become resistant to insecticide
2- the survivors will reproduce, and the offspring will be resistant to the insecticide
3- the survivors will reproduce, but the offspring will be killed by another application of the insecticide
4- the survivors will continue to survive for many years beyond their normal lifespan
Answer:
2
Explanation:
the ones that survived are the ones that had the favorable trait, so they'll be able to reproduce and their offsprings are likely to receive that trait as well.
Of the animals in the bottom row, which one is most likely to be a keystone species?
nuthatch
deer
frog
butterfly
Answer:
Deer
Explanatio
The deer is most likely to be a keystone species.
What is a Keystone species?This is defined as the organism which has a strong impact and defines the ecosystem.
The deer is a keystone species as many organisms depend on it as a source of food in the ecosystem.
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What is the correct IUPAC name for Al(IO₃)₃?
Answer:
Aluminum Iodate
The IUPAC name of Al(IO3)3 is diiodyloxyalumanyl iodate.
What is IUPAC name ?The systematic method of nomenclature of the organic or inorganic compound on the basis of International Union of Pure and Applied Chemistry.
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what is full from of PCO
Answer:
Chemistry- Phosphaethynolate
Communication- Public Call Office
Hope this helped! Mark as the brainliest, please!!!
The graph below shows distance over time. Which of these situations
could be represented by this graph?
Pls answer quick
Answer:
the second option
Explanation:
look at the distance where the meet up at the house and the go to school
As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 M acetic acid for technical reasons having to do with its production. You have determined that the solubility product Ksp of Herbigon is 9.00×10−6.
Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 1.50×10−3 M ? The pKa of acetic acid is 4.76.
i hope i helped for this problem
What is true about sunlight?
A.It is the source of all energy for plants and animals.
B.It is the source of most of the energy for plants and animals.
C.It is the source of very little energy for plants and animals.
D.It is the source of very little energy for plants and animals.
DONT USE UP THE POINTS I WILL REPORT YOU!
Tell me if your from connexus.
I believe your answer will be D. I say this because only some animals need sun, and only some plants need sun to grow.
A buffer solution contains 0.345 M acetic acid and 0.377 M sodium acetate . If 0.0613 moles of potassium hydroxide are added to 250 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume does not change upon adding potassium hydroxide. )
Answer:
pH = 5.54
Explanation:
The pH of a buffer solution is given by the Henderson-Hasselbach (H-H) equation:
pH = pKa + log[tex]\frac{[CH_3COO^-]}{[CH_3COOH]}[/tex]For acetic acid, pKa = 4.75.
We calculate the original number of moles for acetic acid and acetate, using the given concentrations and volume:
CH₃COO⁻ ⇒ 0.377 M * 0.250 L = 0.0942 mol CH₃COO⁻ CH₃COOH ⇒ 0.345 M * 0.250 L = 0.0862 mol CH₃COOHThe number of CH₃COO⁻ moles will increase with the added moles of KOH while the number of CH₃COOH moles will decrease by the same amount.
Now we use the H-H equation to calculate the new pH, by using the new concentrations:
pH = 4.75 + log[tex]\frac{(0.0942+0.0613)mol/0.250L}{(0.0862-0.0613)mol/0.250L}[/tex] = 5.54how is the water cycle the driving process behind weathering erosion and deposition
The number 875000 written in scientific notation would be
Answer:
8.75 x 10^5
Explanation:
hope this helps
0.24 moles of a gaseous product from a reaction is collected in a 25.0-L container at a pressure of 300.0 kPa. Determine the temperature (in °C) at which the gas was collected.
Answer:
3428.58 °C
Explanation:
We'll begin by converting 300 KPa to atm. This can be obtained as follow:
101.325 KPa = 1 atm
Therefore,
300 KPa = 300 KPa × 1 atm / 101.325 KPa
300 KPa = 2.96 atm
Next, we shall determine the temperature. This can be obtained as follow:
Number of mole (n) = 0.24 mole
Volume (V) = 25 L
Pressure (P) = 2.96 atm
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
PV = nRT
2.96 × 25 = 0.24 × 0.0821 × T
74 = 0.24 × 0.0821 × T
Divide both side by 0.25 × 0.0821
T = 74 / (0.24 × 0.0821)
T = 3755.58 K
Finally, we shall convert 3755.58 K to °C. This can be obtained as followb:
T(°C) = T(K) – 273
T(K) = 3755.58 K
T(°C) = 3755.58 – 273
T(°C) = 3428.58 °C
Thus, the temperature at which the gas was collected is 3428.58 °C
is an oak tree a decomposer consumer or a producer?
Answer: producer
Explanation:
what is past form of be
Answer:
was or were
Explanation:
self explainitory
Part A
Consider the following balanced reaction: N2(g) + 3 H2(9) - 2 NH3(9) How many moles of NH3 could be produced from 0.500 mol of H2?
Answer:
0.33 mole of NH₃
Explanation:
The balanced equation for the reaction is given below:
N₂ + 3H₂ —> 2NH₃
From the balanced equation above,
3 moles of H₂ reacted to produce 2 moles of NH₃
Finally, we shall determine the number of mole of NH₃ that will be produced by the reaction of 0.5 moles of H₂. This can be obtained as follow:
From the balanced equation above,
3 moles of H₂ reacted to produce 2 moles of NH₃
Therefore, 0.5 moles of H₂ will react to produce = (0.5 × 2)/3 = 0.33 mole of NH₃.
Thus, 0.33 mole of NH₃ was obtained from the reaction
2.
C₂H6
+
O2
H20
+
CO2
Answer:
[tex]C_{2}H_{6} +O_{2} -> H_{2}O+CO_2[/tex] is a combustion reaction
Explanation:
The reaction is a combustion since you have a hydrocarbon reacting with oxygen to form water and carbon dioxide.
The balanced equation is: [tex]2C_{2}H_{6} +7O_{2} ->4H_{2}O+6CO_2[/tex]
If this helped, a brainliest answer would be greatly appreciated!
Angus, Hereford, and Holstein are common types of ___
breeds.
NEED HELP NOW
Answer:Cattle
Explanation:Cattle
If two angles add up to 90 degrees, then the two angles form a right angle
Answer:
A complementary angle is an angle that adds up to 90 degrees. supplementary angles add up to 180 degrees. So a supplementary angle lies on a single, straight line, and a complementary angle is a right angle.
Answer:
Explanation:
A complementary angle is an angle that adds up to 90 degrees. supplementary angles add up to 180 degrees. So a supplementary angle lies on a single, straight line, and a complementary angle is a right angle.
The periodic table has columns that group Elements according to their
A. Name
B. Properties
C. Atomic number
D. Mass
Marking brainlist
Explanation:
atomic number.............
4. Ms. Desabille bought pork meat for P205.00 per kilo , about how much did she pay for 7.5 kilos?
A. P 1500.00 B. P1600,00
C. P 1400.00
DP 1300.00
5. If gasoline costs P49.65 per liter and your tank holds 50.35 liters , then about how much will you pay to full
your tank?
A P 2 500.00 B. P2 400.00
C. P2 300.00
D. P 1 500.00
6. Mr. Bernard travels 5.12 km per hour on his bike. How far can he travel in 3.25 hours?
A 1.664 km B. 166.4 km
C. 16.64 km
D. 1664
7. Mrs. Allysa purchased 48 pencils at P 4.50 each. How much did she pay for all the pencils?
A P 261.00 B. P 162.00
B. P 216.00
D. 612.00
8. The Villaroel family bought a 125.65 square meter lot at P 4500.00 per square meter. How much did they
pay?
A. P556 425 B. P 565 425
C. P 556 452
D. P 655 425
9. What is 2.7 - 10?
A 2.70
B. 0.027
C. 0.27
D. 27
10. What is 98.75 + 4?
A. 24. 6877 B. 24.6885
C. 24.6865
D. 24.6875
11. A store owner has 63 kilograms of candy. If she puts the candy into 21 jars, how much candy will each ja
contain?
A. 4 kg
B. 3 kg
C. 0.4 kg
D. 0.3 kg
12. It is the quantitative relation between two amounts showing the number of times one value contains or is
contained within the other.
A. proportion B. ratio
C. number
D. quantity
math ito
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If the pressure on a gas decreases from 1480 mm Hg at 478 K to 555 mm Hg, what is the final temperature?
V1 = _____ P1 = _____ T1 = _____
V2 = _____
Law:
P2 = _____
T2 = _____
Answer:
179 K
Explanation:
From the question given above, the following data were:
Initial pressure (P₁) = 1480 mm Hg
Initial temperature (T₁) = 478 K
Final pressure (P₂) = 555 mm Hg
Final temperature (T₂) =?
The final temperature of the gas can be obtained as follow:
P₁/T₁ = P₂/T₂
1480 / 478 = 555 / T₂
Cross multiply
1480 × T₂ = 478 × 555
1480 × T₂ = 265290
Divide both side by 1480
T₂ = 265290 / 1480
T₂ ≈ 179 K
Therefore, the final temperature of the gas is 179 K
What is the molality of a solution of naphthalene dissolved in chloroform if the solution has a boiling point of 63.2 °C?
Answer:
3.6
Explanation:that is right
Make a song give me some bars
Answer:
Make me a song give me some bars wait am i rappin to hard livin life high crazy right touch on her shhh f in th mhm aint waistin no time lets get into it tonight
Explanation:
What visible changes, in addition to precipitate formation, show that cations and anions have rearranged to form new products?
Answer:
Precipitation reactions
Explanation: