Ask question

Ask question

All categories

4 years ago

12

Use dimensional analysis to find the number of cm/min in 5.8 m/hr. Show your work on the white board. Be sure to calculate the a

nswer in the correct number of significant figure

1 answer:

Murrr4er [49]4 years ago

8 0

The answer is attached in the photo

You might be interested in

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

Yuki888 [10]

<u>Answer:</u> The volume of CO formed is 254.43 L.

<u>Explanation:</u>

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

Which tool should Darla and Rob use to measure the force that pulls a car down the map

svetoff [14.1K]

Answer:

C. A Spring Scale

Explanation:

Using process of elimination, we can quickly decide that a stopwatch and a ruler will not be useful in measuring the force. This leaves us with either the spring scale or a balance scale. A balance scale is used to compare two weights, so this is eliminated. That leaves us with a spring scale. This is because we can attached the spring scale to the car and when we let it go, we can record the force. I hope this helps!

5 0

2 years ago

How many Joules of heat will be given off by 55.0g of water as it cools from 87.3°C to 25.0°C?

PSYCHO15rus [73]

Answer:

Q = -14322.77 J

Explanation:

Given data:

Mass of water = 55.0 g

Initial temperature = 87.3°C

Final temperature = 25.0 °C

Heat given off = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water is 4.18 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 25.0 °C - 87.3°C

ΔT = - 62.3 °C

Q = 55.0 g×4.18 J/g.°C × - 62.3 °C

Q = -14322.77 J

5 0

3 years ago

The element with highest second ionization energy is<br> (1) He (2) Li (3) Be (4) B

marusya05 [52]

Get your free Steam Gift Card Codes at http://steamkeygiveaway.com/ It really works!

4 0

3 years ago

Elabora un texto escrito en el que explica las funciones principales del sistema nervioso y como responde a los estímulos extern

Alina [70]

Answer:

Recibir y analizar la información y producir respuestas.

Explicación:

Las principales funciones del sistema nervioso es recibir información del entorno externo y produce respuestas a la información recibida. El sistema nervioso comprende el cerebro y la médula espinal que controla todo el cuerpo. hay células sensoriales presentes en la piel que reciben estímulos externos y a través de las neuronas la información se transfiere al sistema nervioso. después de procesar la información, la respuesta se envía a los músculos para que actúen frente a los estímulos externos.

8 0

4 years ago