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g100num [7]
3 years ago
10

What is the volume of a rock that has a mass of 50 grams and a density of 5 g/ml?

Chemistry
1 answer:
Brut [27]3 years ago
3 0

Explanation:

density = mass/ volume

so,

volume = mass/ density

volume = 50 g/ 5 g/ml³

volume = 10 ml³

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A non-metallic atom(at.no. 9) forms a molecule of the same,containing a single covalent bond. give reason
bezimeni [28]
They are so may forms
4 0
3 years ago
Nitrogen gas has a density of 4.566 g/L and liquid nitrogen density is 809.0 g/L.
DedPeter [7]

Answer:

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Explanation:

IM in 7th dont ask me bro

6 0
3 years ago
Pls help I don’t understand: Which of these is a balanced chemical reaction?
nata0808 [166]

Answer:

C) 2CO + O₂ →   2CO₂

Explanation:

The equation C is correct.

2CO + O₂ →   2CO₂

This equation have four oxygen atom and two carbon atoms on both side of equation. So it is correctly balanced.

All others are incorrect:

A) CO + O₂ →   CO₂

this is incorrect because there are three oxygen atoms on left while two atoms on right.

B) CO + 2O₂ →   2CO₂

this is incorrect because there are five oxygen atoms on left while four atoms on right.

D)  2CO + 2O₂ →   2CO₂

this is incorrect because there are six oxygen atoms on left while four atoms on right.

3 0
3 years ago
The speed of sound in air at 20° C is 343 m/s. Its speed in water at 20° C is 1,483 m/s. How much longer would it take for sound
Alona [7]
<h3>Answer:</h3>

22.41 seconds longer

<h3>Explanation:</h3>
  • Sound is a longitudinal wave that requires a material medium for transmission hence called a mechanical wave.
  • Examples of medium in which sound travels in are water and air.

From the question give;

Speed of sound in air at 20°C is 343 m/s

Speed of sound in water at 20°C is 1,483 m/s

We are given a distance of 10 Km or 10,000 m

We need to finder how much longer it will take for the sound to travel in air.

Time = Distance ÷ Speed

Therefore;

Time taken in Air = Distance ÷ speed of sound in air

                             = 10000 m ÷ 343 m/s

                             = 29.15 seconds

Time taken in water = Distance ÷ speed of sound in water

                                 = 10,000 ÷ 1,483 m/s

                                 = 6.74 seconds

Difference in time = 29.15 seconds - 6.74 seconds

                              = 22.41 seconds

Therefore, it takes 22.41 seconds longer for sound to travel through air than water.

8 0
3 years ago
How many grams of aluminum in required to produce 17.5 g of hydrogen
azamat

Mass of Aluminum = 157.5 g

<h3>Further explanation</h3>

Given

17.5 g of Hydrogen

Required

Mass of Aluminum

Solution

Reaction

2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂

mol Hydrogen :

= mass : molar mass

= 17.5 g : 2 g/mol

= 8.75

From the equation, mol Al :

= 2/3 x mol H₂

= 2/3 x 8.75

= 5.83

Mass Al :

= 5.83 x 27 g/mol

= 157.5 g

6 0
3 years ago
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