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3 years ago

I need help, someone please help me

Chemistry

2 answers:

MArishka [77]3 years ago

6 0

Answer:

c) the panda eats both plant and animal: fish and bamboo

d)it shows direction of feeding, the one below is fed on by the one above

zimovet [89]3 years ago

3 0

C) eats both plants and animals/meats
D) how everything is related

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The picture on the left represents the reactants in the equation and the picture on the right represents the products. Does this

JulijaS [17]

According to Law of conservation of matter," matter can neither be created nor destroyed but is conserved and remains constant over time'.

In above picture let suppose the Blue balls represent N₂ molecule and White balls represent H₂ molecules.

So, left picture represent reactants,

2 N₂ + 6 H₂

And , right picture represent products,

4 NH₃

So, there are 4 N atoms and 12 Hydrogen atoms in reactants and 4 N atom and 12 Hydrogen atoms in products. Means the mass of elements is conserved. The overall reactions is as follow,

2 N₂ + 6 H₂ → 4 NH₃

Result:
Yes! This reaction follow Law of conservation of Matter.

6 0

3 years ago

To what class of minerals do gold,silver & copper belong?

dolphi86 [110]

They are native elements i.e they occur in nature naturally without being combined with other elements
They are all metals and are all Transitional metals

4 0

3 years ago

How many variance electrons in Aluminium? Is it 3

ololo11 [35]

Answer:

Question #1: How many valence electrons in Aluminum? Is it 3?

------> Yes, aluminum has 3 valence electrons.

Question #2: How many valence electron in Sulfur? Is it 6?

-----> Yes, sulfur has 6 valence electrons.

Question #3: What type of bonds do these form? Is it covalent or ionic?

-----> Covalent bonds generally occur between 2 nonmetals. Ionic bonds generally occur between a metal and a nonmetal. Aluminum is a metal and sulfur is a nonmetal. Therefore, an ionic bond would form.

Question #4: How many aluminum atoms will you need? 1, 2, or 3?

-----> Atoms become ions in order to achieve a full octet of valence electrons (8 valence electrons). Since aluminum atoms have 3 valence electrons, they are likely to donate these electrons during ionization. As such, aluminum ions look like this: Al³⁺. Since sulfur atoms have 6 valence electrons, they are likely to receive 2 electrons during ionization. As such, sulfur ions look like this: S²⁻.

-----> The ionic compound formed will be Al₂S₃. There would be 2 aluminum atoms because this arrangement allows for the ionic compound to have an overall charge of 0.

Aluminum = +3

Sulfur = -2

+3 + 3 + (-2) + (-2) + (-2) = 0

Question #5: How many sulfur atoms will you need? 1, 2, or 3?

-----> As stated previously the resulting ionic compound is Al₂S₃. There would be 3 sulfur atoms to balance the charges.

6 0

2 years ago

How many grams of oxygen, O 2 , is consumed when 41.9 g of propane, C 3 H 8 , burns?

LenaWriter [7]

Answer:

152.4 g of O₂ are consumed.

Explanation:

We start from the combustion reaction:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

We convert the mass of propane to moles:

41.9 g . 1mol /44g = 0.952 moles

Ratio is 1:5. 1 mol of propane consumes 5 moles of oxygen at propane combustion

Then, 0.952 moles may consume (0.952 . 5) /1 = 4.76 moles.

We convert moles to mass → 4.76 mol . 32g/mol = 152.4 g

8 0

3 years ago

20. 6th-grade question

Yuki888 [10]

Answer:

D. visible light and the electromagnetic spectrum

have a small area of overlap.

Explanation:

you have to look careful in answering questions you could end up right or wrong, on these answers are very important to know, and I am always right with these answer's

7 0

3 years ago