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Vera_Pavlovna [14]
3 years ago
12

For a science experiment, a student rubs a mineral against a porcelain plate. The students has just performed

Chemistry
2 answers:
Gemiola [76]3 years ago
6 0
The correct answer is letter B: A streak test.
frosja888 [35]3 years ago
4 0

B.Streak Test.Hope this helps! :)

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6. A student is using colored beads to make a model of aluminum sulfate, Al2(SO4)3. Aluminum atoms are represented by blue beads
avanturin [10]

Answer:

H. 2 blue, 3 yellow, and 12 green

Explanation:

Aluminium atoms (Al) = Blue Beads

Oxygen Atoms (O) = Green Beads

Sulfur (S) = Yellow beads

From the compound Al2(SO4)3, the number of atoms present are;

Al = 2

S = 3

O = 12

This means the model would contain;

2 Blue beads

12 Green beads

3 Yellow beads

The correct option is; H. 2 blue, 3 yellow, and 12 green

7 0
3 years ago
Why is melting ice cream a physical?
worty [1.4K]

Melting ice cream is a physical change because it is a phase change, the water in the ice cream gains thermal energy and the inter-molecular forces are overcome and the molecules move further apart forming a liquid. It is not a chemical change because no chemical reactions occurred.  

3 0
3 years ago
Read 2 more answers
Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
Phoenix [80]

Answer: Option (B) is the correct answer.

Explanation:

It is known that for writing a chemical reaction equation, reactants are written on left hand side whereas products are written on right hand side.

And in between reactants and products a forward arrow is placed pointing towards the products.

Therefore, the reaction for carbon burns in the presence of oxygen to give carbon dioxide will be written as follows.

          Carbon + Oxygen \rightarrow Carbon dioxide

Here, carbon and oxygen atoms are the reactants whereas carbon dioxide is the product.

6 0
3 years ago
How many moles of iron can be produced from 4.20 moles of iron (III) oxide?
Kay [80]
Hope this helps, have a nice day ahead!

6 0
3 years ago
Which of the following statements is true?
photoshop1234 [79]

Answer:Electrons are atoms that are magnetic

Explanation:All atoms have electrons

7 0
3 years ago
Read 2 more answers
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