How many molecules are in 0.33 moles of CaCO3?

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.

Answer:

A. Oil is to heavy to mix with water

HOPE THIS HELPS

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Explanation:

Answer:

It should be C - Water can only mix with polar molecules.

Explanation:

Oil is non-polar and water is polar.

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.

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.

Answer:

yep.. I am wide awake here.

yep

ExPlAnAtIoN:

yezs and nozs

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

Answer:b

Explanation:

Answer:  waning gibbous

Explanation:

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!

Answer:

M2 = 0.95M

Explanation:

M1V1 = M2V2

(1.9)(0.5) = M2(1)

M2 = 0.95M

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

Answer: 0.040 mol/l

Explanation: Molarity c = n/V (Concentration)

c = 0.060 mol / 1,5 l = 0,040 mol/l

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

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.

Answer:

I think C...................

Answer:

A solution whose pH=1 is ten times more acidic than the solution whose pH=2.

Explanation:

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:

Answer: Radon is radioactive

Explanation: thats all i know

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.

Distance = 10 kilometers.

Time = 2 hours.

Its speed.

We know,

[tex] { \boxed{\bf{\rm \red {Speed \: = \: Distance \: × \: Time}}}} [/tex]

Speed = 10 kilometers × 2 hours

Speed = 20 km/hr

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.

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

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.

Answer: OCl2 is polar because the two O-Cl bond dipoles don't cancel each other.

Answer:

the answer is b: it shows how temperature of a substance changes when heated

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.

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

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