Does anyone knows the answer to this?

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

kherson [118]

The S.I unit for the given term:

Mass is expressed in kilogram (kg)

temperature is expressed in kelvin (K)

Time is expressed in seconds (s)

Current is expressed in ampere (A)

Explanation:

Current:

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)

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

Temperature: 

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.

Mass: 

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)

Time: 

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

5 0

3 years ago

How many moles of copper Il sulfide can be produced from 2.8 moles of sulfur? Cu + S --> CuS

Kamila [148]

Answer: 2.8 moles of copper (Il) sulfide $(CuS)$ will be produced from 2.8 moles of sulphur.

Explanation:

The balanced chemical reaction is:

$Cu+S\rightarrow CuS$

According to stoichiometry :

1 mole of $S$ produce = 1 mole of copper (Il) sulfide $(CuS)$

Thus 2.8 moles of $S$ will produce= $\frac{1}{1}\times 2.8=2.8moles$ of copper (Il) sulfide $(CuS)$

Thus 2.8 moles of copper (Il) sulfide $(CuS)$ will be produced from 2.8 moles of sulphur.

5 0

3 years ago

What are the physical states in which water can exist in the atmosphere? Give an example of how we can sense each state.

Sliva [168]

Liquid - rain
Solid - snow
Gas - water vapour (when it evapourates from the lithosphere)

3 0

3 years ago

Which option is a physical property of matter?

Elan Coil [88]

Answer:

boiling point is the physial property of matter

5 0

3 years ago

A sample of limestone (calcium carbonate, CaCO3) is heated at 950 K until it is completely converted to calcium oxide (CaO) and

pav-90 [236]

Answer:

Therefore, volume of CO₂ produced in the first step is 9141.404 L

Explanation:

Equations of reactions:

A: CaCO₃(s) ---> CaO(s) + CO₂(g)

B: CaO(l) + H₂O(l) ---> Ca(OH)₂(s)

Molar mass of CaCO₃ = 100 g; molar mass of CaO = 56 g; molar mass of CO₂ = 44 g molar mass of H₂P = 18 g; molar mass of Ca(OH)₂ = 74 g

From equation B, 1 mole of CaO produces 1 mole of Ca(OH)₂

This means that 56 g of CaO produces 74 g of Ca(OH)₂

mass of CaO that produces 8.47 kg or 8470 g of Ca(OH)₂ = 8470 g * 56/74 = 6409.73 g of CaO

Therefore, 6409.73 g of CaO were produced in reaction A

From reaction A, 1 mole of CaCO₃ produces 1 mole CaO and 1 mole of CO₂

Number of moles of CaO in 6409.73 g = 6409.73 g/56 g/mol = 114.46 moles

Therefore, 114.46 moles of CO₂ were produces as well.

Molar volume of gas at STP = 22.4 litres

Volume of CO₂ produced at STP = 114.46 * 22.4 L =2563.904 L

However, the above reaction took place at 950 K and 0.976 atm, therefore volume of CO₂ produced under these conditions are obtained using the general gas equation

Using P₁V₁/T₁ = P₂V₂/T₂

P₁ = 1.0 atm, V₁ = 2563.904 L, T₁ = 273 K, P₂ = 0.976 atm, T₂ = 950 K, V₂ = ?

V₂ = P₁V₁T₂/P₂T₁

V₂ = (1.0 * 2563.904 * 950)/(0.976 * 273)

V₂ = 9141.404 L

Therefore, volume of CO₂ produced in the first step is 9141.404 L

3 0

2 years ago

Does anyone knows the answer to this?​

Does anyone knows the answer to this?