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Step2247 [10]
3 years ago
8

Compare the properties of metals and nonmetals.

Chemistry
1 answer:
Serga [27]3 years ago
5 0

<em><u>Metals </u></em>

- have lustre: they appear shiny

- can conduct heat and electricity

- have a very high melting point

- are malleable(this means they can be hammered without bending)

- have a high density

- can be ductile

- mostly opaque

- make sounds when hit

- corrode easily

<em>Non- metals</em>

- look dull

- don't conduct heat and electricity well

- aren't ductile

- can be at any state at room temperature(solid, liquid, gas)

- mostly transparent


Hope it helps :)

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A 0.1149-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter cont
Andreas93 [3]

Answer:

The heat given off by the burning Mg is 30.5 kJ/grams or 745.5 kJ/mol

Explanation:

<u>Step 1: </u>Data given

Mass of magnesium sample = 0.1149 grams

Molar mass of magnesium = 24.3 g/mol

bomb calorimeter that has a heat capacity of 1769 J/°C

Mass of water = 321 grams

Temperature change = 1.126 °C

Step 2: Calculated heat released

Q = (1769 J/°C * 1.126 °C) + (321 grams * 4.184 J/g°C * 1.126 °C)

Q = 3504.18 J =3.504 kJ

<u>Step 3:</u> Calculate the heat given off by the burning Mg, in kJ/g

3.504 kJ / 0.1149 grams = 30.5 kJ/grams

<u>Step 4:</u> Calculate moles of Magnesium

Moles of magnesium = mass magnesium / Molar mass magnesium

Moles magnesium = 0.1149 grams / 24.3 g/mol

Moles magnesium = 0.0047 moles

<u>Step 5:</u> Calculate the heat given off by the burning Mg, in kJ/mol

3.504 kJ / 0.0047 moles = 745.5 kJ/mol

The heat given off by the burning Mg is 30.5 kJ/grams or 745.5 kJ/mol

8 0
3 years ago
What is the proper measurement of the vol-ume represented?1. 2.0 ml 2. 2.500 ml 3. 2.5 ml 4. 2.50 ml?
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From the given choices above, the volume that is well represented is the fourth choice, 2.50 mL. This is because there is enough number of significant figures after the decimal point to ensure that there is accuracy in the given values. 
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Answer:

I believe that it would be copper because copper is all of those things.

Explanation:

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The math is set up like

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The correct answer is C.) metallic bonds

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3 0
2 years ago
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