Answer:
Soil is heterogeneous mixture of sand particles of different sizes, shape and of different compositions.
Explanation:
Homogeneous mixtures are defined as the mixtures in which components are evenly spread throughout the solution. The size and shape of the particles are similar in these mixtures.
For example : alloys, salt solution.
Heterogeneous mixtures are defined as the mixtures in which component are unevenly spread throughout the solution. The size and shape of the particles differ in these mixtures.
For example : sand in a water, soil etc.
Brass is an alloy homogeneous mixture of metals.
Air is a homogeneous mixture of gases.
Coffee with sugar stirred in is also homogeneous mixture.
Soil is a heterogeneous mixture of sand particles of different sizes, shape and of different compositions.
Answer:
The kinetic energy of the two stones is 320 J
Explanation:
Kinetic energy is the energy that a body possesses due to its movement. So it is the capacity or work that allows an object to go from being at rest, or still, to moving at a certain speed.
In other words, the kinetic energy of an object is that which is produced due to its motion and depends on its mass and velocity as follows:
where the kinetic energy Ec is measured in joules (J), the mass m is measured in kilograms (kg) and the velocity v in meters/second (m/s).
In this case you know that a 20 kg curling stone is sliding in a positive direction at 4 m/s. So:
Replacing you have:
Ec₁= 160 J
A second curling stone slides at the same speed but in the opposite direction. So:
Replacing you have:
Ec₂= 160 J
The kinetic energy of the two stones is calculated as:
Ec= Ec₁ + Ec₂
Ec= 160 J + 160 J
Ec= 320 J
<u><em>The kinetic energy of the two stones is 320 J</em></u>
Answer:
All are correct
Explanation:
This might be a little deceptive. The question shows H, O and N which would designate ELEMENTS.
However, all of these can also be considered compounds and molecules as well. BUT, they are H₂, O₂ and N₂ when they are molecules and compounds.
So it depends on the whether the question is being literal or not.
Answer:
1. Balanced molecular equation:
- HF(aq) + RbOH(aq) → RbF(aq) + H₂O(l)
2. Net ionic equation:
- H⁺ (aq) + OH⁻ (aq) → H₂O(l)
Explanation:
<u>1. Write the word equation</u>
This is the reaction of an acid and a base producing salt plus water.
- hydrofluoric acid + rubidium hydroxide → rubidium fluoride + water
<u>2. Balanced molecular equation</u>
- HF(aq) + RbOH(aq) → RbF(aq) + H₂O(l) ← answer
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<u>3. Write the ionic compounds in aqueous solution as ions</u>
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Overall ionic equation:
- H⁺ (aq) + F⁻ (aq) + Rb⁺ (aq) + OH⁻ (aq) → Rb⁺ (aq) + F⁻ (aq) + H₂O(l)
<u>4. Cancel the spectator ions</u>
The spectator ions are those that appear in both sides of the overall ionic equation. In this case they are F⁻ (aq) and Rb⁺ (aq).
Net ionic equation:
- H⁺ (aq) + OH⁻ (aq) → H₂O(l) ← answer
Answer: a. linear, one-way
Explanation:
With the transmission method of communication, Communication is described as a linear, one-way transfer of information from the sender to the receiver.
The sender is intentionally sending a message to the receiver in this model and the main focus is on the sender and the message that was sent by the sender. The receiver is simply viewed as the target not a responder and so the interaction is linear instead of circular.
