How much does 3 moles of silica weigh
84.2565
Because
1 silica is equal to 28.0855,
times 3 is 84.2565
Why is KOH considered to be a base? A. It has a high concentration of OH+ ions in solution. B. It has a high concentration of H+ ions in solution. C. It has a high concentration of H- ions in solution. D. It has a high concentration of OH- ions in solution.
Answer:
D. It has a high concentration of OH- ions in solution.
How much energy is required to raise the temperature of 74 g of water from 19 °C to 47 °C.
Answer:
The energy required is 8660.96 J.
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change). This heat is given by the expression:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
C= 4.18 [tex]\frac{J}{g*C}[/tex]m= 74 gΔT= Tfinal - Tinitial= 47 C - 19 C= 28 CReplacing:
Q= 4.18 [tex]\frac{J}{g*C}[/tex] *74 g* 28 C
Solving:
Q= 8660.96 J
The energy required is 8660.96 J.
Describe your observations of how the waves are behaving in the photograph.
Answer:
The waves are behaving this way due to the simultaneous water drops landing in the water.
Explanation:
because ima smart baddie (≧▽≦)
(I found this meme on Pinterest)
So what if when we get reincarnated on our tomb stone should we really write R.I.P or B.R.B?
lol don't report me my I asked my TEACHER this and she is wondering the same thing so this does effect me academically.
How many liters (L) of water need to be added to prepare 4800mL of 0.5M NaCl from a 3M NaCl stock solution? (Use the formula M1V1=M2V2)
Answer: There is 0.8 liters (L) of water required to be added to prepare 4800mL of 0.5M NaCl from a 3M NaCl stock solution.
Explanation:
Given: [tex]M_{1}[/tex] = 0.5 M
[tex]V_{1}[/tex] = 4800 mL
Convert mL into L as follows.
[tex]1 mL = 0.001 L\\4800 mL = 4800 mL \times \frac{0.001 L}{1 mL}\\= 4.8 L[/tex]
[tex]M_{2}[/tex] = 3 M
Formula used to calculate the volume of water required as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula.
[tex]M_{1}V_{1} = M_{2}V_{2}\\0.5 M \times 4.8 L = 3 M \times V_{2}\\V_{2} = \frac{0.5 M \times 4.8 L}{3 M}\\= 0.8 L[/tex]
Thus, we can conclude that 0.8 liters (L) of water need to be added to prepare 4800mL of 0.5M NaCl from a 3M NaCl stock solution.
How many grams are in 1.52 moles of PC13? (molar mass: 137.33 g/mol)
Bobby has a toy car that is sitting at rest on the floor. He decides to play with his toy car and pushes it with 3 newtons to the right. Bobby's friend Sam also decides to play with the toy car and pushes it with 6 newtons to the left at the exact same time. Which of the following best describes the resulting motion of the toy car? A It travels to the right at an increasing speed. B It travels to the right at a constant speed. C It travels to the left at an increasing speed. D It travels to the left at a constant speed.
Answer: D
Explanation:
The car will move to the left because Sam is implying a grater force (3 N < 6 N) but it is traveling at a constant speed because there is still a force being acted upon it. <3
The result of applying forces to a toy car is required.
Option D is correct.
Force applied by Bobby is 3 N to the right
Force applied by Sam is 6 N to the left
Right is taken as positive and left is taken as negative.
m = Mass of toy
a = Acceleration
Net force applied to the toy
[tex]F=3-6\\\Rightarrow F=-3\ \text{N}\\\Rightarrow ma=-3\\\Rightarrow a=\dfrac{-3}{m}[/tex]
So, the toy will move left with a constant acceleration.
Constant acceleration means its speed will be increasing.
So, option D is correct.
Learn more:
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PLZ HELP. Write and balance the following chemical equations:
nitrogen and oxygen combine to form dinitrogen pentoxide
Answer:
No they form nitrogen oxide which can be poisonous to some species but depending on the amount of nitrogen it can be harmful to everything living. Such as if you put it with a plant that had low nitrogen levels then there would be no carbon dioxide to filter.
Explanation:
What do electrochemical cells use to generate electricity?
Answer:
flow of electrons
Explanation:
took the quiz
Which group of coefficients balances the following chemical equation? 2KCIO3 → _KCI + _O2 a 1, 3 b 2,2 C 2,3 d 2.1 e 1, 1
Answer:
2KClO3 = 2KCl + 3O2
I hope it's helps you
It was suggested that, because of the jump in numbers, from chlorine to potassium, there was an element missing between them. Which element was discovered between these elements?
Answer:
Argon
Explanation:
Argon because chlorine is atomic number 17 and potassium is atomic number 19
Argon is between them thank you
Traits are passed from parents to offspring. These traits are determined by
Answer: Gene Characteristic. (They are usually made up of more than one gene).
What is the conjugate base of the following acids?
a) HClO4 b) NH4 + c) H2O
d) HCO3 –
3. What is the conjugate acid of the following bases?
a) CN- b) SO4 2- c) H2O
d) HSO4-
Answer:
A
Explanation:
HOPE THIS HELPS
Which term identifies a type of intermolecular force?
A.
covalent bonding
B.
hydrogen bonding
C.
ionic bonding
D.
metallic bonding
Answer: B. Hydrogen Bonding
Explanation: I got it right on castle learning lol
There are different kinds of forces. The term that identifies a type of intermolecular force is hydrogen bonding.
The three known to be types of intermolecular interactions. They are
Dipole–dipole interactions London dispersion forces hydrogen bonds.
Hydrogen bonding is known to be an intermolecular force that takes place between two molecules. That molecule is known to have a hydrogen atom be bonded to a nitrogen, oxygen, or fluorine atom.
Learn more about Bond from
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Trihydrogen monophosphide is a covalent molecule that can also act as an acid. What is the correct acid name for trihydrogen monophosphide ?
Answer:
H₃P phosphidic acid
Explanation:
The Trihydrogen monophosphide, as stated in the exercise, can act as an acid. This is pretty similar to the case of hydrogen chloride, which is a gas but it can also be an acid, in this case, chloridic acid.
In the case of trihydrogen phosphide, we can write it molecular formula which is:
H₃P
Now, this is a binary compound because its composed of only two elements, in this case, hydrogen and phosphide. To name binary acid, we need to name the non metal with the sufije idic, and then, the word acid.
Following this simple rule, the trihydrogen phosphide would be, as acid:
H₃P: phosphidic acid
Hope this helps
The volume of a gas at 4.50 atm is 1.90 L, if the pressure of the gas is increased to 6.70 atm, what is the new
volume? In this problem, V2 =
tje new preasure is 10.7l
What is a precipitation
reaction?
Answer:
A precipitation reaction is one in which substances in solution are mixed and an insoluble product is made. The insoluble product is called a precipitate and can be seen as a solid forming in the reaction mixture.
Explain why using standard chemical names for compounds would be important when working in a laboratory.
Answer:
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Explanation:
Sample A has a mass of 40g and a volume of 10cm^3. Sample B has a volume of 15cm^3 and a mass of 45g. Which sample has a greater density? Show your work.
The Answer Is Sample A
Density -
[tex]density = \frac{mass}{volume} [/tex]
Input The Formula For Both Equations To Find Density.
Sample A -
[tex]d = \frac{40}{10} [/tex]
[tex]d = 4[/tex]
Sample B -
[tex]d = \frac{45}{15} [/tex]
[tex]d = 3[/tex]
On the luminosity chart, temperature increases as you read it to the right. True or False?
Answer:
Explanation:
True
Which feature causes a gap in the geologic record?
extrusion
fault
o intrusion
erosion
Answer:
Hi, there the answer is
A)extrusion
Explanation:
The feature that causes a gap in the geologic record is called extrusion.
What is extrusion in geologic record?Sometimes magma can force itself through a crack or fault in the rock at the Earth's surface. It pours out over the Earth's surface in a volcanic eruption. This process is called extrusion. The rocks that form from extruded magma are called extrusive igneous rocks.
Direct Extrusion, Indirect Extrusion, Hydrostatic Extrusion and Lateral or Vertical Extrusion are some types of extrusion.
Lava that hardens on the surface is called an extrusion. The rock layers below an extrusion are always older than the extrusion. Beneath the surface, magma may push into bodies of rock. There, the magma cools and hardens into a mass of igneous rock called an intrusion.
Therefore, The feature that causes a gap in the geologic record is called extrusion.
Learn more about extrusion, here:
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100 pointts pls answer quick and no link :In the reaction, Hydrogen + Iodine --> Hydrogen Iodide at equilibrium, some Iodine is is added. What happens to the equilibrium?
Answer:
the concentration of hydrogen iodide will be higher than it was in the original equilibrium conditions.
Calculate the percent ionization of a 0.381 M solution of hydrocyanic acid.
Answer:
.00402 %
Explanation:
hydrocyanic acid (HCN) is a weak acid with a Ka of 6.17*10^-10 so you need to do a RICE table
initial concentration of HCN is .381 and initial H+ and CN- concentration is 0.
that means the equillibrium concentration of HCN will be (.381-x) and H+ and CN- will be x
put that into the formula for Ka, so it'll be Ka = x^2/(.381-x) and then use quadratic equation to solve. You'll end up getting x = 1.5 * 10^-5.
Then to find percent ionization you solve (concentration of formed ions / initial HCN)
Which will be (1.5 * 10^-5 / .381) * 100 = .00402 % making it a very weak acid <3
BRAINLIEST NO LINK OR REPORTED A beach ball has a volume of 2.5 L of gas while at a temperature of 500 K. If the volume decreases to 2 L, what is the new temperature?
a. .25 K
b. 250 K
c. 400 K
d. 4k
Answer:
250k
I Really This Helps A Little Bit.
identify the reaction of S8+F2-->SF8
The given reaction is a combination / synthesis reaction, since two reactants combine to form a single product
Sodium oxide reacts with water to make sodium hydroxide.
1. Write and balance the equation.
2. List all the mole ratios.
3. How many moles of water are needed to react with 18.4 moles of sodium oxide?
4. How many grams of sodium hydroxide are formed when 4.5 moles of sodium oxide react with excess water?
5. How many grams of water are needed to make 5.65 moles of sodium hydroxide?
6. How many grams of sodium hydroxide are formed when 23.7 g of sodium oxide react with excess water?
7. How many liters of water are required to form 93.4 g of sodium hydroxide?
Answer:
So the total mass is 50 plus 150 grams the heat capacity 4.18 joules per gram per degree C. And the temperature change is 36 minus 25 and so we can calculate Delta H for the reaction that takes place.
Explanation:
calculate the mass of 0.5 moles of caco3 in grams with procedure
Answer:
50g
Explanation:
moalr mass of CaCO3= 40g/mol+ 12g/mol+(16g/mol*3)
=52g/mol+48g/mol
=100g/mol
1 mol= 100g
0.5mol=x
by cross multiplication,
0.5*100gmol=x mol
x=50g
Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, total is 1 atm if PN₂ = 593.4 mm Hg, PCO₂ = 3.0 mm Hg, and Pothers = 7.1 mm Hg? *
0.3 atm
0.2 atm
0.4 atm
0.8 atm
Answer:
The pressure of O₂ is 0.8 atm.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case:
PT=Pnitrogen + Pcarbon dioxide + Pother gases
Being:
Pnitrogen: 593.4 mmHg Pcarbon dioxide: 3 mmHgPother gases: 7.1 mmHgand replacing:
PT= 593.4 mmHg + 3 mmHg + 7.1 mmHg
you get:
PT= 603.5 mmHg
Being 760 mmHg= 1 atm, you get:
PT= 603.5 mmHg= 0.8 atm
The pressure of O₂ is 0.8 atm.
The Volume of a gas is measured to be 675.6 mL at 61.8 C. If the volume of the gas were changed to 410.9 mL, what would the final temperature be?
Answer:
203.63 K
Explanation:
Using Charles law equation,
V1/T1 = V2/T2
Where;
V1 = initial volume (mL)
V2 = final volume (mL)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information in this question,
V1 = 675.6 mL
V2 = 410.9 mL
T1 = 61.8°C = 61.8 + 273 = 334.8K
T2 = ?
Using V1/T1 = V2/T2
675.6/334.8 = 410.9/T2
Cross multiply
675.6 × T2 = 334.8 × 410.9
675.6T2 = 137569.32
T2 = 137569.32 ÷ 675.6
T2 = 203.63 K