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Iteru [2.4K]
3 years ago
10

Please help with Chemistry! Very urgent! I’ll give you 40 points

Chemistry
1 answer:
kvv77 [185]3 years ago
5 0

Answer: 3. No displacement, zinc is most reactive.

4. Calcium Chloride, Calcium is most reactive.

5. No displacement, Copper is most reactive

6. No displacement, Calcium is most reactive

7. Hydrogen Oxide, Hydrogen is most reactive

8. Carbon oxide, Carbon is most reactive

9. No displacement, Aluminum is most reactive

10. Potassium Kryptide + Lead, no displacement, Potassium is most reactive.

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The Earth is always _______ as it revolves around the sun.
EastWind [94]

Answer

Rotating

Explanation:

The Earth is always being pulled towards the Sun by gravity.

The Earth is not moving fast enough to "escape" the Sun's gravity and leave the solar system, but it is going too fast to be pulled into the Sun. Therefore, it keeps going around and around( roating)- orbiting the Sun.

5 0
3 years ago
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What is the name of the the following formula Cd(HOOCCOO)2
Andreyy89

Answer:

I think that is called oxalic acid

Explanation:

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3 years ago
HELP !!!!!! An object moving forward at 10 m/s suddenly begins moving backward at 5 m/s. What is the most accurate explanation f
Nana76 [90]
It moves backwards 5m/s slower that forward
8 0
3 years ago
Why methyl orange in basic medium is yellow and why it is red in acidic medium?​
Sholpan [36]
Methyl orange shows red color in acidic medium and yellow color in basic medium. Because it changes color at the pKa of a mid strength acid, it is usually used in titration for acids. Unlike a universal indicator, methyl orange does not have a full spectrum of color change, but it has a sharp end point.
7 0
3 years ago
Two unknown molecular compounds were being studied. A solution containing 5.00 g of compound A in 100. g of water froze at a low
LenaWriter [7]

Answer:

Compound B has greater molar mass.

Explanation:

The depression in freezing point is given by ;

\Delta T_f=i\times k_f\times m..[1]

m=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent in kg}}

Where:

i = van't Hoff factor

k_f = Molal depression constant

m = molality of the solution

According to question , solution with 5.00 g of A in 100.0 grams of water froze at at lower temperature than solution with 5.00 g of B in 100.0 grams of water.

The depression in freezing point of solution with A solute: \Delta T_{f,A}

Molar mass of A = M_A

The depression in freezing point of solution with B solute: \Delta T_{f,B}

Molar mass of B = M_B

\Delta T_{f,A}>\Delta T_{f,B}

As we can see in [1] , that depression in freezing point is inversely related to molar mass of the solute.

\Delta T_f\propto \frac{1}{\text{Molar mass of solute}}

M_A

This means compound B has greater molar mass than compound A,

4 0
3 years ago
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