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nika2105 [10]
3 years ago
12

Match each SI unit to the quantity it measures mass temperature time electric current

Chemistry
1 answer:
kherson [118]3 years ago
5 0

<u>The S.I unit for the given term:</u>

Mass is expressed in kilogram (kg)

temperature is expressed in kelvin (K)

Time is expressed in seconds (s)

Current is expressed in ampere (A)

<u>Explanation:</u>

<u>Current: </u>

The current can be defined as the electric charge flow in the surface (means ratio of charge per unit time). It is measured in ampere (A)

             Current\ I=\frac{\text { charge }}{\text { time }}

<u>Temperature: </u>

Kelvin (K), the general temperature unit in the international standard units system. The Kelvin scale is an absolute thermodynamic temperature scale that uses absolute zero, a temperature at which all thermal movements end with a classic description of thermodynamics.

<u>Mass: </u>

Mass is both a feature of the objects weight and its resistance measurement to accelerate under the influence of pure force. The mass of the object also determines the gravitational force. The basic unit of mass is kilogram (kg)

<u>Time: </u>

Time is the measurement of how much distance the objects takes to travel from one to another (speed). It is expressed in seconds (s).

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If 0.905 mol Al2O3 is produced in the reaction, what mass of Fe in product's
Marrrta [24]

<u>Answer:</u> Amount of iron produced is 101.36 grams.

<u>Explanation:</u>

For the reaction of aluminium and iron oxide, the equation follows:

2Al+Fe_2O_3\rightarrow Al_2O_3+2Fe

By Stoichiometry of the reaction,

When 1 mole of aluminium oxide is produced, then 2 moles of iron is also produced.

So, when 0.905 moles of aluminium oxide is produced, then \frac{ 2}{1}\times 0.905mol=1.81moles of iron is also produced.

Now, to calculate the amount of iron produced, we use the equation:

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

Molar mass of iron = 56 g/mol

Moles of iron = 1.81 moles

Putting values in above equation, we get:

1.81mol=\frac{\text{Mass of iron}}{56g/mol}\\\\\text{Mass of iron produced}=101.36g

Hence, amount of iron produced is 101.36 grams.

3 0
3 years ago
Calculate the specific heat of a metallic element if 50.0 g of the metal need 314 joules of heat energy to raise
Brrunno [24]

Answer:

c = 0.25 j/g.°C

Explanation:

Specific heat capacity:

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

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

Given data:

Mass of metal = 50.0 g

Heat needed = 314 j

Initial temperature = 25°C

Final temperature = 50 °C

Specific heat = ?

Solution:

ΔT  = 50 °C - 25°C = 25°C

Q = m.c. ΔT

c = Q / m. ΔT

c = 314 j /  50.0 g . 25°C

c = 314 j / 1250 g. °C

c = 0.25 j/g.°C

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3 years ago
If you need to measure the volume of liquid in a bottle of eye drops, what unit would be the most practical?
aniked [119]
The volume of eye drop fluid in a bottle is specified in milliliter, because in medical 1 drop=12ml
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3 years ago
N2 + 3H2, -&gt; 2NH3<br> If I have 50.6 L of N2 and excess H2, how many liters of NH3 can I produce?
Anastaziya [24]

Answer:

C. 101.2 L

Explanation:

N2 + H2= NH3

Balancing it,

N2 + 3 H2 = 2.NH3

(1 mol) (3 mol) (2 mol)

which means

1 molecule of nitrogen reacts with 3 molecule of hydrogen to form ammonia.

Likewise,

50.6 l of nitrogen reacts with 50.6 × 3= 151.8 l of hydrogrn to form 50.6 × 2= 101.2 l of ammonia.

3 0
3 years ago
What is the price of 1 gallon of gasoline in U.S. dollars in France?
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The price of 1 gallon of gasoline in U.S. dollars in France is $4.87
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