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Alex17521 [72]
3 years ago
9

I NEED HELP AS SOON AS POSSIBLE PLEEAAASSE ITS NOT AS BAD AS IT LOOKS I PROMISE ITS PHYSICAL AND CHEMICAL CHANGE

Chemistry
1 answer:
madam [21]3 years ago
8 0

The original change is chemical, affecting the main colorant because of temperature. Paint, is a surface change, not changing anything about the leaf itself, but showing a different color to your eye.

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Free brainiest! the first person who makes me blush or makes me want to kiss you.
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Answer:

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3 years ago
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The compound zinc fluoride is a strong electrolyte. write the transformation that occurs when solid zinc fluoride dissolves in w
Svetach [21]
Strong electrolytes by definition are those compounds that completely dissociates into their component ions when dissolved in water. The chemical formula for the zinc fluoride is,
               ZnF2
This means that each formula unit is composed of one atom of zinc and 2 atoms of fluoride. The ions comprising the unit are Zn²⁺ and F⁻. The dissociation is as shown below,
              ZnF₂ -->  Zn²⁺  + 2F⁻
When dissolved in water it is expected that the compound dissociates into three different ions, one Zn²⁺ and two F⁻. 
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3 years ago
Which statement about endothermic reactions is true?
Y_Kistochka [10]

Answer: The definition of an endothermic reaction is that the products have higher energy than the reactants, resulting in a positive enthalpy of reaction.

Explanation:

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Is granite a liquid gas or solid at room temperature
Katen [24]
Granite is a rock, so it would be a solid

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3 years ago
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Part B
dezoksy [38]

Answer:

5.83g C4H10 x (1 mol C4H10/58.05 g (molar mass of C4H10) x (10 mol H2O/ 2 mol C4H10) x (18.002 g H2O (molar mass of H2O)/ 1 mol H2O=

Answer: 9.04 g of H2O

Explanation:

First set up equation: C4H10 (g)+ O2(g) -> CO2(g) + H2O(g)

Next balance it: 2C4H10 (g)+ 13O2(g) -> 8CO2(g) + 10H2O (g)

Use equation to get moles and plug given

5.83g C4H10 x (1 mol C4H10/58.05 g (molar mass of C4H10) x (10 mol H2O/ 2 mol C4H10) x (18.002 g H2O (molar mass of H2O)/ 1 mol H2O

3 0
2 years ago
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