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tekilochka [14]
3 years ago
15

I’ll mark you brainliest

Chemistry
1 answer:
IRISSAK [1]3 years ago
4 0

Answer:

D.

Explanation:

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Given:
galina1969 [7]

Answer: 4.74 moles

Explanation:

2LiBr+Ba\rightarrow BaBr_2+2Li

Moles of Ba=\frac{\text {given mass}}{\text {molar mass}}

Moles of Ba=\frac{325g}{137g/mol}=2.37 moles

According to given balanced equation,

1 mole of Barium gives 2 moles of Li

Thus 2.37 moles of Barium gives=\frac{2}{1}\times 2.37=4.74 moles

Thus 4.74 moles of lithium will be produced by 135 g of barium.

4 0
3 years ago
Read 2 more answers
Item 3
svetoff [14.1K]

Answer:

Semiconductors are poor conductors at low temperatures, but their resistance decreases with increasing temperature.

Explanation:

A semiconductor can be defined as a crystalline solid substance that has its conductivity lying between that of a metal and an insulator, due to the effects of temperature or an addition of an impurity. Semiconductors are classified into two main categories;

1. Extrinsic semiconductor.

2. Intrinsic semiconductor.

The statement which best describes the electrical conductivity of metals and semiconductors is that semiconductors are poor conductors at low temperatures, but their resistance decreases with increasing temperature.

This ultimately implies that, semiconductors are typically an insulator (poor conductor) at low temperatures and a good conductor at high temperatures.

Additionally, conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction.

6 0
3 years ago
40 cm3 of acid were mixed with 60 cm3 of alkali in an insulated container. What name is given to this type of reaction?
Stells [14]

Answer:

neutralization reaction

6 0
2 years ago
How is the law of conservation of mass applied to<br> ecology?
zmey [24]

Answer:

The Law of Conservation of Mass tells us that matter is neither created nor destroyed during a chemical reaction. ... The Law of Conservation of Mass applies as the total mass of the products is equal to the total mass of the reactants.

Explanation:

7 0
3 years ago
Read 2 more answers
Calculate the moles of 25.2 g Na2S2O8
vekshin1

Answer:

To calculate the moles we must first find the molar mass M

M (Na2S2O8) = (23*2) + (32*2) + (16*8)

= 46 + 64 + 168

= 278g/mol

Molar mass = mass/moles

moles =mass / molar mass

= 25.2/278

= 0.0906mol

Hope this helps.

4 0
4 years ago
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