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Marianna [84]
3 years ago
13

Pls help I will give brainpower to who ever. Helps

Chemistry
2 answers:
Tju [1.3M]3 years ago
7 0

Answer: im pretty sure it is A but i might be wrong

Explanation:

trasher [3.6K]3 years ago
4 0

Answer:

Their identity changes in both Reaction A and Reaction B.

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Why is the water cycle called a cycle and not a system?
alexira [117]
It is called a cycle because it is repetitive, therefore making it a cycle (or almost never ending)
5 0
4 years ago
How to tell if a compound is ionic or molecular?
zhenek [66]
<span>When naming compounds, the first thing you need to do is decide if the compound is ionic or molecular. *Ionic compounds will contain both metals and non-metals, or at least one polyatomic ion. *Acids will always include the (aq) symbol beside the formula, and the name will include the word acid.</span>
5 0
4 years ago
Which are examples of contact forces?
lesantik [10]

Answer:

Contact force is a force that requires a contact between two bodies and is ubiquitous in nature

Explanation:

The force is distributed in two categories i.e

  • Contact force
  • Non-Contact force

Contact Forces  are the forces which is requires a contact between two bodies to occur.

The Types of contact forces are given below:

  • Frictional Force
  • Tension Force
  • Normal Force
  • Air Resistance Force
  • Applied Force
  •  Spring Force

Some common daily examples of the contact force are

  1. Frictional force between the tyres of a moving vehicle and the road.
  2. Air flowing in opposite direction of a moving object.
  3. Pushing a table with hand and the friction between its base and floor.
  4. Stretching a rubber band with hands etc.

Also non-contact forces are Gravitational force, Electrical force and Magnetic force.

8 0
3 years ago
Write the dissociation equation for NH4OH.​
iVinArrow [24]

Explanation:

NH4OH(aq) ---> NH4+(aq) + OH-(aq)

7 0
3 years ago
If 1,000 J of energy is added to a steam engine, and 400 J of work is done by the engine, how much thermal energy ends up being
dsp73

Answer:

0.4

The efficiency is defined as the work done divided by the heat provided at Th. ε = W/Qh = 400 J/1000 J = 0.4 The Carnot efficiency is given in terms of the high and low temperatures.

Hope this helps, please let me know if it is wrong.

7 0
2 years ago
Read 2 more answers
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