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GuDViN [60]
3 years ago
11

I need help ): soo.. help me ! please (:

Chemistry
2 answers:
Natasha_Volkova [10]3 years ago
6 0
23 Sandwiches

Slices of cheese

6 slices of bread

0 slices of cheese

I think this is right.
Hope this helps :)
Step2247 [10]3 years ago
5 0

Answer:

23 Sandwiches

6 slices of bread

0 slices of cheese

Explanation:

brainliest pls:)

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When we combine two simpler substances into a more complex one, it is known as a reaction.
Nata [24]

Answer:

It would be known as a chemical reaction or a chemical compound.

3 0
3 years ago
What is the mass percent of oxygen (0) in SO2?
vazorg [7]

Answer:

D. (16.0 g + 16.0 g) × 100% / (32.1 g + 16.0 g + 16.0 g) = 49.9%

Explanation:

Step 1: Detemine the mass of O in SO₂

There are 2 atoms of O in 1 molecule of SO₂. Then,

m(O) = 2 × 16.0 g = 16.0 g + 16.0 g = 32.0 g

Step 2: Determine the mass of SO₂

m(SO₂) = 1 × mS + 2 × mO = 1 × 32.1 g + 2 × 16.0 g = 32.1 g + 16.0 g + 16.0 g = 64.1 g

Step 3: Detemine the mass percent of oxygen in SO₂

We will use the following expression.

m(O)/m(SO₂) × 100%

(16.0 g + 16.0 g) × 100% / (32.1 g + 16.0 g + 16.0 g) = 49.9%

5 0
3 years ago
Why is ozone an important form of oxygen?
Anton [14]
Ozone is made up of 3 atoms of Oxygen and present in stratosphere of our atmosphere. It prevents us from "Ultraviolet rays" of Sunlight so it is an important form of oxygen or us

Hope this helps!
4 0
3 years ago
Determine whether each statement is a description of a physical property or a chemical property. Please check the box that appli
sdas [7]
All except option two
5 0
4 years ago
Read 2 more answers
If one body is positively charged and another one is negatively charged free electrons tend to ?
lord [1]

Answer is: Move from the negatively charged body to the positively charged body.

The electron (symbol: e⁻) is a subatomic particle whose electric charge is negative one elementary charge.

The proton (p⁺) is subatomic particle with a positive electric charge of +1e elementary charge.

Opposite charges (positive and negative) attract one another.  

The negatively charged body has extra electrons, more electrons than protons.

The positively charged body has less electrons than protons.

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4 years ago
Read 2 more answers
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