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3 years ago

A Substance has a mass of 10g and a volume of 5cm3 Calculate density:

Chemistry

1 answer:

jenyasd209 [6]3 years ago

5 0

Answer:

2 g/cm3

Explanation:

Density:

we know that density of an object can be measured by dividing its mass to its volume.

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Given data:

mass= 10 g

volume= 5 cm3

density= ?

Now we will put the values in the formula,

d= 10 g/ 5 cm3

d= 2 g/cm3

The density of object is 2 g/cm3.

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Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air.

lesya692 [45]

Answer:

The first three options given out of the five options are correct.

It collects chemical data. 
It records real-time sampling data. 
It processes and stores chemical data.

Explanation:

An electronic air sampler is a device that is used by people to check apprehension of contamination having individuals with the help of certain volume of air sampling.

The Device is used for recording the chemical data of contamination and the real-time data is sampled and recorded and the data is processed and stored. The air sampling is done in two ways.

3 0

3 years ago

Grignard reagents are air-and moisture-sensitive. List at least threereactants, solvents, and/or techniques that were utilized i

Evgesh-ka [11]

<h2>Diethylether (DTH) andTetrahydrofuran (THF).</h2>

Explanation:

Grignard reactions reacts with water forming alkanes.
The water present causes the reagent to decompose rapidly.

So, the solvents which are utilized in the experimental procedure to minimize exposure of the grignard reagents to air and/ormoisture are solvents such as anhydrous diethyl ether or tetrahydrofuran(THF), poly(tetramethylene ether) glycol (PTMG).

The reason for the use of these solvents is the oxygen present in these solvents stabilizes the magnesium reagent.

THF (Tetrahydrofuran) is a stable compound.

4 0

4 years ago

The quartz in granite begins to melt at 650°C, so if we find a migmatite where quartz has melted in a granitic rock and we know

Elanso [62]

Answer:

d. 26.0 km

Explanation:

If the temperature in the region increases with depth by about 25 °C /km, then at a depth of 2 km the temperature would be 50 °C higher, at a depth of 3 km the temperature would be 75 °C higher and so on.

The only way for finding melted quartz would be if the temperature is at least 650 °C.

Temperature = 25 °C /km * Depth

We put the data given by the problem and solve for Depth:

650 °C = 25 °C /km * Depth

Depth = 26.0 km

6 0

4 years ago

What is the mass of 5.7 x 1022 atoms Mn?

Svet_ta [14]

The mass of 5.2 x 10^22 manganese atoms in grams would be 635.784 grams.

What is Avogadro's constant?
Avogadro's number tells us how many particles are in one mole (or mol) of a substance. Electrons, molecules, or atoms could be among these particles. Avogadro's number has a value of approximately 6.022140857×10²³ mol⁻¹. Avogadro's number tells us how many particles are in one mole (or mol) of a substance. Electrons, molecules, or atoms could be among these particles. Avogadro's number has a value of approximately 6.022140857×10²³.

Computation of mass
Avogadro calculated that every material had 6.022 x 10^23 atoms per mole.

5.2 x 10^22 atoms of Mn would contain how many moles?
= 6.022 x 10^23 /1 x 5.2 x10^22
=11.58 moles

Mn mass equals 11.58 moles multiplied by 54.9
= 635.784 grams

You may learn more about Avogadro's constant here: brainly.com/question/15989275
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6 0

1 year ago

How much money will it cost to drive a school bus 94.00 miles if it gets 6.500 miles per gallon and gas costs $2.459/gallon?

bagirrra123 [75]

Answer:

It will cost $35.5602

Explanation:

$2.459 /6.5 (mpg) = 0.3783 (cents per mile)

$0.3783 (cost per mile) * 94 (total miles) = $35.5602 total

6 0

2 years ago