How many molecules are in 0.33 moles of CaCO3?
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Related Questions
are the bonds of OCl2 polar?
Answers
Answer: OCl2 is polar because the two O-Cl bond dipoles don't cancel each other.
Hello everyone, I got stumped by this question:
Do you agree or disagree with the claim, A change to any gas in the atmosphere affects energy absorbed by the surface in the same way.
a
agree
b
disagree
Could you help me figure this out?
Answers
Answer:b
Explanation:
Calculate the molarity of 0.060 moles of sodium bicarbonate (NaHCO3) in 1500. mL of solution.
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Answer: 0.040 mol/l
Explanation: Molarity c = n/V (Concentration)
c = 0.060 mol / 1,5 l = 0,040 mol/l
Which of the following could be the hypothesis supported by an investigation that demonstrates the law of conservation of mass in relation to chemical reactions?
A. If the reaction obeys the law of conservation of mass, then mass will be the same before and after the reaction.
B. If the reaction obeys the law of conservation of mass, then mass will increase after the reaction.
C. If the reaction obeys the law of conservation of mass, then mass will be different before and after the reaction.
D. If the reaction obeys the law of conservation of mass, then mass will decrease after the reaction.
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According to the law of conservation of mass, mass is neither created nor destroyed in a chemical reaction. If the reaction obeys the law of conservation of mass, the mass before and after the reaction will be the same.
What does the law of conservation of mass?Any element's mass at the start of a reaction will equal its mass at the end of the reaction. Accounting for all reactants and products in a chemical reaction results in the same total mass at any point in time in any closed system.
When coal, for example, is burned, the carbon atom transforms into carbon dioxide. The carbon atom undergoes transformation from solid to gas, but its mass remains constant.
According to the law of conservation of mass, the amount of mass that enters a chemical reaction in the form of reactants must equal the amount of mass that exits the reaction process in the form of products. This is only possible in a closed system. For example, if 2g of reactant A reacts with 32g of reactant B, the mass of the product AB formed is 34g.
To learn more about Law of conservation of mass, refer to:
brainly.com/question/24783543
#SPJ2
How would the graph differ if you were to draw a graph to compare temperature with
time taken for the reaction to take place?
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Select the correct answer.
Which of the following is true for a heating curve?
Ο Α.
It shows how the pressure of a substance changes when heated.
OB.
It shows how the temperature of a substance changes when heated.
OC.
It shows how the volume of a substance changes when heated.
It shows how the mass of a substance changes when heated.
OD
Reset
Next
Answers
Answer:
the answer is b: it shows how temperature of a substance changes when heated
What is the freezing point of a solution that has 5.0 moles of Nal in 1250 g of water? (K = 1.86°C/m; molar
mass of water = 18.0 g)
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Para saber si se lleva a cabo una reacción donde un metal desplaza a otro metal de su sal u otro compuesto, es preciso:
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Answer:
Explanation:
¡Hola!
En este caso, dado que las reacciones de desplazamiento simple se llevan a cabo cuando un metal desplaza a otro metal de su sal u otro compuesto, es preciso tener en cuenta la serie de reactividad de los metales que se muestra en el archivo adjunto.
Así, es mandatorio que el metal con el que la sal original reacciona, sea más reactivo que el catión de la misma, de modo contrario, la reacción tendría lugar. Por ejemplo, si el sodio reacciona con cloruro de zinc, al este primero estar más arriba en la serie, quiere decir que es capaz de desplazar el zinc en el cloruro original y así se formaría zinc metálico y cloruro de sodio.
¡Saludos!
How many kilojoules of heat must be transferred to a 480-g aluminum pizza pan to raise its temperature from 22°C to 234°C? The specific heat of aluminum in this temperature range is 0.96 J/g.°С. Show your work.
Answers
Answer:
97.7 kJ
Explanation:
We'll use the formula for specifc heat: Q=mcΔT
Q= heat/energy (Joules), m= mass (grams), c= specific heat (different for each substance and is usually given)
ΔT= final temperature - initial temperature
Let's check our given units and see if they're the correct, here they all are. Let's plug in what we know.
Q=mcΔT
Q=(480)(0.96)(234 - 22)
Q=(480)(0.96)(212)
Q= 97,690 J
Before we submit an answer, let's check out units. We have our answer in Joules, but we want it it kilojoules, so we'll convert it knowing that:
1000 Joules = 1 kilojoule
97,690J x [tex]\frac{1 kJ}{1000J}[/tex] = 97.7kJ
Explanation:
the answer and the working out is shown above.
An ambulance took 2 hours to cover a distance of 10 kilometers. Find its speed.
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Answer:
5km/hour
Explanation:
2hours = 10km
/2 /2
1 hour = 5km
An ambulance took 2 hours to cover a distance of 10 kilometers. Find its speed.
Answer:-Given:-Distance = 10 kilometers.
Time = 2 hours.
To Find:-Its speed.
Solution:-We know,
[tex] { \boxed{\bf{\rm \red {Speed \: = \: Distance \: × \: Time}}}} [/tex]
Speed = 10 kilometers × 2 hours
Speed = 20 km/hr
Its speed is 20 km/hr. [Answer]anybody still woke ???
Answers
Answer:
yep.. I am wide awake here.
yep
ExPlAnAtIoN:
yezs and nozs
10. Aqua means "water" or "a light blue color." Marine refers to the sea. Use this information
to determine what the gemstone aquamarine might look like.
Determine what the gemstone aquamarine might look like?
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Answer:
[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt ♡ AQUAMARINE ♡ }} \mid}}[/tex]
=> The colour of this stone is usually a pale greenish blue, owing to the presence of iron impurities. Stones that are treated with heat look more blue than green. On the Mohs scale of hardness, aquamarine ranges between 7.5 and 8 making it a relatively hard gemstone.
=> The best way to identify a real aquamarine stone is by looking at its colour. In its natural form, they have a pale blue colour, which is similar to seawater. They may have a slight green or yellow tint as well. Naturally occurring gems have excellent clarity and transparency.
=> The hardness of the stone is another feature you can use to identify the stone. Aquamarine stones are hard and they don’t get scratches easily. However, they can easily scratch glass and other such surfaces. So, if you find visible scratches on the stone, rethink your decision to buy it.
=> Most faceted aquamarine stones are clean to the eye and clear of any inclusions. However, translucent and opaque aquamarine is also available. These are usually fashioned into cabochons or beads. In some cases, inclusions may appear as parallel tubes. Such stones can be crafted to show a cat’s eye. Stones with cat’s eye and star effect are rare and highly priced.
name any two
chemical fertilizers rich in potassium
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Explanation:
Fertilizers are chemically synthesized plant nutrients.
Nitrogen (N), Phosphorus (P) and Potassium (K) are macronutrients and are required in large amounts by plants. So, farmers use fertilizers in order to supply these nutrients. NPK 15:15:15 , NPK 20:20:20, NPK 15:30:15 are examples of fertilizers used to supply N, P, K to crops.
Explanation:
1.Potassium Nitrate(KNO3)
2.Potassium Sulphate(K2SO4)
They provide potassium to plants for making their roots and shoots healthy.
Which lunar phase is 21 days after the first quarter?
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Answer: waning gibbous
Explanation:
I need help with this Asap. Best answer gets brainiest, also how is your day.
Answers
justin noticed several cracks in the sidewalk. Weeds are growing through them, cause the crack to expand. What process is this?
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Answer:
Explanation:
Weeds and Small Plant Roots Exploit Existing Concrete Cracks
Instead, the plant's roots take advantage of existing microscopic cracks. New cell growth takes place at the tips of plant roots. ... Eventually, molecule by molecule, the plant's growth can force its way into the slab and create a surface crack.
PLS HELP FAST!!!! Determine the new concentration if you dilute 500mL of a 1.9M solution of NaCl to 1L.
Answers
Answer:
M2 = 0.95M
Explanation:
M1V1 = M2V2
(1.9)(0.5) = M2(1)
M2 = 0.95M
Explain why the difference between the wet bulb temperature and the dry bulb temperature is always 0C when the relative humidity is 100%??
HELPPP!
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Answer:
The dry bulb temperature is the ambient air temperature that is measured by regular thermometers, while the wet bulb temperature is measured by thermometers that are wrapped in wicks. The greater the wet bulb depression, the greater the felt effect is on the discharge air temperature.
Explanation:
What is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days?
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Answer: A- 1 day
Explanation: I really hope that helped. BYE!!
1 day is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days
What are some facts about Radon something that is unique and relatively unknown by the general population???? Helpppppp helpppppp
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Answer: Radon is radioactive
Explanation: thats all i know
What equation is used to calculate atomic mass?
WARNING!!!! NO LINKS OR YOU WILL BE REPORTED!!!!
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Answer:
Average atomic mass = f1M1 + f2M2 +… + fnMn where f is the fraction representing the natural abundance of the isotope and M is the mass number (weight) of the isotope. The average atomic mass of an element can be found on the periodic table, typically under the elemental symbol.
What did you know for sure after one Test? Two tests? Three tests?
Answers
Answer:
I knew that I learned something and passed that test. And that is all I want to do.
Explanation:
Answer:
vaiana and I have been working with our team since we been through
What is the volume of 16.0 g of SO2 (g) at STP?
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Answer:
Explanation:
At STP 1 mole of an ideal gas = 22.4 L.
Assuming SO2 (sulfur dioxide) acts as an ideal as, we have 16 g SO2 x 1 mol/64 g = 0.25 moles SO2
0.25 moles x 22.4 L/mole = 5.6 liters
An _______________________ (device that converts electrical energy into kinetic energy) runs by using the magnetic field formed by a ______________________________ formed into a loop.
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Answer:
A motor (device that converts electrical energy into kinetic energy) runs by using the magnetic field formed by a flowing current formed into a loop.
Can someone help me with this??
Answers
Answer:
A. Oil is to heavy to mix with water
HOPE THIS HELPS
-Todo <3
Explanation:
Answer:
It should be C - Water can only mix with polar molecules.
Explanation:
Oil is non-polar and water is polar.
how much more acidic is a solution with a pH of 1 than a solution with a pH of 3
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Answer:
A solution whose pH=1 is ten times more acidic than the solution whose pH=2.
Explanation:
DOS MOVILES PARTEN A LAS 12:00 AL MISMO TIEMPO HACIA EL NORTE DEL PAIS .¿ QUE DISTANCIA LOS SEPARA A LAS 13 HORAS SUPONIENDO QUE SUS VELOCIDADES SON 20 M/S Y 50 K/H ?
Answers
Answer:
22km
Explanation:
Las velocidades de los móviles nos van a definir cuánta distancia recorren por unidad de tiempo. Para resolver este problema debemos hallar la distancia recorrida en una hora por cada vehículo (Porque de las 12 horas a las 13 solo hay una hora)
Un móvil está recorriendo 50km/h. En una hora recorrerá: 50km
El otro móvil recorre 20m/s. En km/h:
20m/s * (3600s / h) = 72000m/h * (1km / 1000m) = 72km/h. El móvil recorrerá, en una hora, 72km
1h = 3600s; 1km = 1000m
La distancia que los separa es de:
72km - 50km =
22km
Four 22.4 samples of nitrogen are bottled at STP and placed into environments with varying temperature. Which environment yield a sample the the greatest kinetic energy?
A)100k
B) 303k
C)273 k
D)200k
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WILL GIVE BRAINLIEST PLEASE HELPP!!!
Answers
Answer:
I think C...................
UNA ONDA SE MUEVE CON UNA FRECUENCIA DE 2 (HZ), Y SU RAPIDEZ DE PROPAGACIÓN ES DE 20 (m/s). ¿Cuál ES LA LONGITUD DE ONDA.