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Agata [3.3K]
3 years ago
14

What is silicon used for?​

Chemistry
2 answers:
skelet666 [1.2K]3 years ago
6 0

Answer:

glass

Explanation:

My name is Ann [436]3 years ago
5 0

Answer:

glass

Explanation:

edge 2021

brainliest or thanks would be greatly appreciated :)

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Copper has a density of 8.96 g/cm3. If 75.0 g of copper is added to 50.0 mL of water in a graduated cylinder, to what volume rea
Tcecarenko [31]

Answer:

The answer to your question is    Final volume = 58.37 ml

Explanation:

Data

density = 8.96 g/cm³

mass = 75 g

volume of water = 50 ml

Process

1.- Calculate the volume of copper

  Density = mass / volume

Solve for volume

  Volume = mass / density

Substitution

  Volume = 75/8.96

Simplification

  Volume = 8.37cm³    or 8.37 cm³

2.- Calculate the new volume of water in the graduated cylinder

  Final volume = 50 + 8.37

  Final volume = 58.37 ml

3 0
3 years ago
1.this substance is a natural non-living material with a uniform structure throughout
vovikov84 [41]
1.Mineral
2.Igneous
3.Composition

7 0
3 years ago
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Using the balanced equation below, how many moles of water can be produced when 4 grams of Hydrogen react? 2H2(g)+O2(g) —> 2H
gavmur [86]

Answer:

4 × 10 g

Explanation:

Step 1: Write the balanced equation

2 H₂(g) + O₂(g) ⇒ 2 H₂O(I)

Step 2: Calculate the moles corresponding to 4 g of H₂

The molar mass of H₂ is 2.02 g/mol.

4 g × 1 mol/2.02 g = 2 mol

Step 3: Calculate the moles of H₂O produced from 2 moles of H₂

The molar ratio of H₂ to H₂O is 2:2. The moles of H₂O produced are 2/2 × 2 mol = 2 mol.

Step 4: Calculate the mass corresponding to 2 moles of H₂O

The molar mass of H₂O is 18.02 g/mol.

2 mol × 18.02 g/mol = 4 × 10 g

7 0
2 years ago
How many grams of CO2 are in 2.1 mol of the compound? a) 21.0g c) 66.0g
Lilit [14]
1 mole CO2 = 44.0096 grams CO2


<span>2.1 mol CO2 x (44.0096 grams CO2/1 mole CO2) = 92.4 grams CO2</span>
8 0
3 years ago
Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate
MissTica
Yes this is true good job
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3 years ago
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