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sdas [7]
3 years ago
5

What is the difference between speed and velocity?

Chemistry
1 answer:
Amanda [17]3 years ago
6 0

Answer:

(B) direction

Explanation: Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.

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Nitrogen and hydrogen combine to form ammonia in the Haber process.
Vaselesa [24]

Answer:

-105 kJ

Explanation:

The enthalpy change of a reaction is the sum of the energy of the bonds of the reactants and the products. The bonds at the reactants are being broken, so it's an endothermic reaction, so the bond energy must be positive.

The bonds at the products are being formed, so the process is exothermic, and the bond energy must be negative. There are being broken 1 N≡N bond and 3 H-H bonds, and are being formed 6 N-H bonds:

Reactants: 945 + 3*432 = 2241 kJ

Products: 6*(-391) = -2346 kJ

ΔH = 2241 - 2346

ΔH = -105 kJ

8 0
3 years ago
Calculate the volume of an object with dimensions measuring: 15cm x 6cm x 10cm
Oksanka [162]

Answer:

15 X 6 X 10 = 900 cm³

Explanation:

4 0
3 years ago
True of false metals like copper are sometimes used to fill cavities in teeth
ElenaW [278]
I'd say false because copper is what they used to drink out of in the middle ages, and it caused them to get very sick, so I doubt they would use copper in your mouth.
7 0
3 years ago
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BabaBlast [244]

Explanation:

desk I have a lot of work and I will send it in the one

7 0
3 years ago
Read the following hypothesis about why a chicken bone becomes bendy after being soaked in vinegar:
Studentka2010 [4]

Answer:

B. observing that a bone placed in a beaker of acid becomes bendy

Explanation:

The hypothesis suggests that when chicken bones are placed in vinegar, they become bendy due to the loss of calcium in their bones.

Calcium is identified as the ossifying material that strengthens the bone. When the acid that makes up the vinegar comes in contact with it, calcium is removed from the bone.

Now we know that calcium has capabilities of reacting with acids.

This suggests that if we also place the bone in an acid, they will bend due to reaction of calcium in the bones with the acid.

5 0
3 years ago
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