How many moles of water are produced when 2 moles of NH4 react with excess Oxygen gas?
The moles of water are produced when 2 moles of NH4 react with excess Oxygen gas is 4 mole of H2O.
Moles are defined as a common unit used in science to measure vast numbers of extremely small things, such atoms, molecules, or other specific particles.
It can also be defined as a metric in chemistry that is used to describe a very high quantity of molecules, atoms, or particles.
Since we only have two moles of NH4, we switch out four for two.
2 NH4 + 3O2 --> 2NO + 4 H2O
As per the reaction, in order to produce 2 moles of NO2 and 4 moles of H2O, 2 moles of NH4 must react with 3 moles of oxygen gas.
Thus, the moles of water are produced when 2 moles of NH4 react with excess Oxygen gas is 4 mole of H2O.
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2.) Al^3+, O^2-
3.) Ca^2, ClO3-
4.) NH4+, P^3-
5.) Cu+, NO3-
Answer:
1.) NiSO₄; 2.) Al₂O₃; 3.) Ca(ClO₃)₂; 4.) (NH₄)₃P; 5.) CuNO₃
Step-by-step explanation:
We can use the criss-cross method to work out the formulas. The steps are
If we use this method, the formula for the compound formed from Na⁺, SO₃²⁻ becomes Na₂SO₃.
1.) Ni²⁺ + SO₄²⁻ ⟶ Ni₂(SO₄)₂ ⟶ NiSO₄
2.) Al³⁺ + O²⁻ ⟶ Al₂O₃
3.) Ca²⁺ + ClO₃⁻ ⟶ Ca(ClO₃)₂
4.) NH₄⁺ + P³⁻ ⟶ (NH₄)₃P
5.) Cu⁺ + NO₃⁻ ⟶ CuNO₃
Which of the following is not related to the First Law of Motion?
An object in motion stays in motion unless acted on by an outside force.
An object at rest will stay at rest.
An object must overcome inertia to begin moving.
Having a heavier mass may increase the force of a moving object.
29
Which of the following is not an example of friction?
Pouring water off a bridge and watching it turn to small drops by the time it hits the ground.
A wrecking ball swinging towards its target.
A piece of ice dropping into a glass of water that sinks more slowly than it fell through the air.
Smoothing an ice rink with a Zamboni.
30
What three quantities are involved with the Second Law of Motion?
acceleration, gravity, inertia
acceleration, inertia, force
mass, gravity, acceleration
acceleration, force, mass
31
Why do phytoplanktons have projections and form long chains?
To catch more food
To respire oxygen more efficiently
To keep from sinking and capture more light
To evade predators
32
If an object's acceleration is zero, which of these could be true?
it is slowing down
it is stopped
it is not changing its speed
Both B and C could be true
Answer:
solute, solvent, solution
solute dissolve in a solvent and the end product is called solution
Answer:
D. The melting of ice
Explanation:
An endothermic reaction ABSORBS heat from its surroundings, it does NOT give heat off into its surroundings.
so...
When a match burns, it gives of heat. So A is incorrect.
When water goes from a vapor into a liquid, the water molecules loose kinetic energy, they do not gain it. And since temperature is the measure of the average kinetic energy in a substance, the water vapor looses heat. If the process was endothermic, it would be gaining heat. So B is incorrect.
When propane gas combusts, the explosion lets off heat into its surroundings, it does not absorb heat. So C is incorrect.
Here's what happens when something melts: the molecules inside the substance receive more and more kinetic energy, until the substance's molecules have enough kinetic energy to vibrate and wiggle past each other, breaking their structure. When ice melts it is receiving kinetic energy from its surroundings, and again, since temperature is the measure of the average kinetic energy in a substance, the process is absorbing heat. Q.E.D.,
D is the correct answer.