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stiks02 [169]
3 years ago
11

HURRY PLEASE (MULTI CHOICE)

Chemistry
2 answers:
Mama L [17]3 years ago
6 0
The magnets in a maglev train system help move, or propel, the train
Lera25 [3.4K]3 years ago
5 0

Answer:

maglev

Explanation:

<em>In</em><em> </em><em>a</em><em> </em><em>train</em><em> </em><em>system</em><em> </em><em>two</em><em> </em><em>magnets</em><em> </em><em>are</em><em> </em><em>present</em><em>:</em><em>one</em><em> </em><em>set</em><em> </em><em>to</em><em> </em><em>repel</em><em> </em><em>and</em><em> </em><em>push</em><em> </em><em>the</em><em> </em><em>train</em><em> </em><em>up</em><em> </em><em>off</em><em> </em><em>the</em><em> </em><em>track</em><em>,</em><em>and</em><em> </em><em>another</em><em> </em><em>set</em><em> </em><em>the</em><em> </em><em>elevated</em><em> </em><em>train</em><em> </em><em>ahead</em><em>,</em><em>taking</em><em> </em><em>advantage</em><em> </em><em>of</em><em> </em><em> </em><em>the</em><em> </em><em>lack</em><em> </em><em>of</em><em> </em><em>friction</em><em>.</em>

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Choose all the answers that apply MORE THAN ONE ANSWER. Salt is an ionic compound. It _____.
Anuta_ua [19.1K]

dissolves easily in water

has a high boiling point

has a high melting point

conducts electricity when melted

Explanation:

Salts are ionic compounds. Ionic compounds are formed when two atoms exchange their valence electrons. One atom gains and the other atom loses.

Generally, ionic compounds have the following properties:

  1. They are usually hard solids with high melting points or liquids with high boiling points.
  2. They are soluble in water and insoluble in non-polar solvents. This is conforms with the solubility rule that like dissolve like.
  3. In aqueous solution or molten form, ionic compounds conducts electricity.
  4. They take part in very fast chemical reactions.

Learn more:

Ionic compounds brainly.com/question/6071838

#learnwithBrainly

7 0
3 years ago
Read 2 more answers
In equation δhsoln=δh1+δh2+δh3 which of the energy terms for dissolving an ionic solid would correspond to the lattice energy?
LekaFEV [45]
The dissolution of a solute in a solvent to form a solution usually occur in three steps, which are delta H1, delta H2 and delta H3. 
For dissolving an ionic solid, the lattice energy, which is the energy that is holding the ionic particles in place correspond to DELTA H2 and it is the energy that must be conquered. The higher the charge in the ionic solid, the higher the lattice energy. The lattice energy must be overcome in order for the solid to dissolve.
4 0
3 years ago
Why nucleus of an atom is negatively charged?​
Igoryamba

Answer:

An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. ... The nucleus of an atom contains protons and neutrons

Explanation:

5 0
3 years ago
How does a barometer predict the weather?
Lunna [17]

Answer:

<em>Barometers measure this pressure. ... Changes in the atmosphere, including changes in air pressure, affect the weather. Meteorologists use barometers to predict short-term changes in the weather. A rapid drop in atmospheric pressure means that a low-pressure system is arriving.</em>

Explanation:

<h3><em>I </em><em>hope</em><em> this</em><em> helps</em><em>!</em></h3>
6 0
3 years ago
ASAP
sammy [17]

The answer is C.

The vast difference in electronegativity of the oxygen and hydrogen in water, the O-H bond is polar.

8 0
3 years ago
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