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Bezzdna [24]
3 years ago
10

Isra is analyzing the properties of several samples of elements to find out which sample is a metalloid. Which set of properties

most likely belongs only to a metalloid?
forms basic compounds and is a solid
has a high luster and is very brittle
is a gas and has low electrical conductivity
is brittle and forms acidic compounds
Chemistry
2 answers:
Semenov [28]3 years ago
7 0

Answer:

ITS B GUYS

Explanation:

GOT IT RIGHT ON EDG

ZanzabumX [31]3 years ago
4 0

Answer:

B.) has a high luster and is very brittle

Explanation:

just took the test

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Yosemite Falls, in California, has a total height of 73,000cm. What is the height in meters?
Flauer [41]

Answer:

Height in meters = 73000 ÷ 100

(1m =100cm)

= 730m

Hope it helps.

5 0
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In the Haber Process, hydrogen (H2) and nitrogen (N2) react to produce
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Answer:

Mass stays the same because no matter is created or destroyed.

Explanation:

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In this specific reaction, the total mass of the reactants should be equal to the total mass of the products when the reaction is complete.

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How much heat is released when 75 g of octane is burned completely if the enthalpy of combustion is -5,500 kJ/mol CsH18? C8H18 +
aalyn [17]

Answer : The correct option is, (D) 3600 kJ

Explanation :

Mass of octane = 75 g

Molar mass of octane = 114.23 g/mole

Enthalpy of combustion = -5500 kJ/mol

First we have to calculate the moles of octane.

\text{ Moles of octane}=\frac{\text{ Mass of octane}}{\text{ Molar mass of octane}}=\frac{75g}{114.23g/mole}=0.656moles

Now we have to calculate the heat released in the reaction.

As, 1 mole of octane released heat = -5500 kJ

So, 0.656 mole of octane released heat = 0.656 × (-5500 kJ)

                                                                   = -3608 kJ

                                                                   ≈ -3600 kJ

Therefore, the heat released in the reaction is 3600 kJ

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