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2 years ago

How can speed be described?

Chemistry

2 answers:

Oxana [17]2 years ago

8 0

Answer:

The mass multiplied by the acceleration of an object.

Explanation:

Please give brainliest, It's not much, but it's honest work.

Svetach [21]2 years ago

7 0

The distance an object travels at a certain velocity

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Is zinc oxide a chemical or physical change when heated?

patriot [66]

It is a physical change. I goes from white, to yellow, back to white.

4 0

4 years ago

The Mond process produces pure nickel metal via the thermal decomposition of nickel tetracarbonyl: Ni(CO)4 (l) → Ni (s) + 4CO (g

Yuki888 [10]

Answer: The volume of CO formed is 254.43 L.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of $Ni(CO)_4$ = 444 g

Molar mass of $Ni(CO)_4$ = 170.73 g/mol

Putting values in above equation, we get:

$\text{Moles of }Ni(CO)_4=\frac{444g}{170.73g/mol}=2.60mol$

For the given chemical reaction:

$Ni(CO)_4(l)\rightarrow Ni(s)+4CO(g)$

By stoichiometry of the reaction:

1 mole of nickel tetracarbonyl produces 4 moles of carbon monoxide.

So, 2.60 moles of nickel tetracarbonyl will produce = $\frac{4}{1}\times 2.60=10.4mol$ of carbon monoxide.

Now, to calculate the volume of the gas, we use ideal gas equation, which is:

PV = nRT

where,

P = Pressure of the gas = 752 torr

V = Volume of the gas = ? L

n = Number of moles of gas = 10.4 mol

R = Gas constant = $62.364\text{ L Torr }mol^{-1}K^{-1}$

T = Temperature of the gas = $22^oC=(273+22)K=295K$

Putting values in above equation, we get:

$752torr\times V=10.4mol\times 62.364\text{ L Torr }mol^{-1}K^{-1}\times 295K\\\\V=254.43L$

Hence, the volume of CO formed is 254.43 L.

5 0

4 years ago

Can someone help me please

Aloiza [94]

A cloud collapses to form a star and disk. Planets form from this disk.

According to our current understanding, a star and its planets form out of

a collapsing cloud of dust and gas within a larger cloud called a nebula
.his dense, hot core becomes the kernel of a new star.

Hoped this helped :D

7 0

3 years ago

Mixture containing 50 grams of carbon and 75 grams of oxygen is sealed in a flask. the total mass of the system is 225 grams. th

GuDViN [60]

The mass is 225 grams

6 0

3 years ago

How much mass does 4.53 x 10^22 have

snow_tiger [21]

4.53x^10^22Simplifies to:4.53x=4.53*x=4.53x

8 0

3 years ago