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Slav-nsk [51]
4 years ago
15

When magnets come within the magnetic fields of other magnets, they move toward or away from each other, depending on their pole

s. The door latch shown in the picture is one of many ways magnets can be used in everyday life. How are magnets most likely used in this latch?
A) Magnets with opposite poles are attached to the door and floor, when they come in contact, they attract one another and latch the door.
B) The magnets are extremely heavy, so when the door is open, the latch on the floor pulls on the magnet, making the door too heavy to close.
C) The door magnets are turned on and off by the switch on the floor. When the door is over the latch, the magnets turn on, latching the door in place.
D) Magnets with similar poles are placed on the floor latch and on the door, which attract one another when they are close, latching the door in place.
Chemistry
2 answers:
Afina-wow [57]4 years ago
5 0

Answer:

The answer is A

Explanation:

Solnce55 [7]4 years ago
4 0

Magnetic Cabinet Latches The doors on cabinets or other furniture doors often have magnetic catches or closures on them. Usually, these are made with an inexpensive ceramic magnet sandwiched between two steel plates, which attract to and come into contact with a steel “strike plate” on the door.

is my answer

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The number of particles in 1 mole of hydrogen gas is ________.
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Hidrogen gas is a diatomic gas, this is H2, which means that one molecule of gas has two atoms (every molecule of hydrogen gas consists in H2).

The particles in gases are the molecules, not atoms.

So, every molecule is a particle, and when you are told that you have 1 mole of hygrogen gas means that you have 1 mole of H2 molecules which is the same that 1 mole of particles.

Therefore, the answer is one mole.
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What is a solid formed from liquid reactions during a chemical reaction
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Cat urine. May sound weird, may get it wrong, but it's true. Your teacher'll freak out.
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Warning signs are sometimes placed on aerosol cans to prevent people from throwing them into a fire. What would be true about th
GarryVolchara [31]

Answer:

The correct option is volume stays constant

Explanation:

When a gas container (in this case an aerosol can) is subjected to heat (from fire), the temperature of the can and subsequently <u><em>the temperature of the gas itself increases</em></u>, an increase in the temperature of the gas cause <u><em>the pressure to also increase;</em></u> as the gas molecules will collide more and faster with each other and against the wall of the can. However, the volume of the gas will remain the same as before it was subjected to the heat - the gas particles do not get destroyed or increased as a result of the heat (law of conservation of matter explains this).

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3 years ago
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What is the difference between the atomic number and the mass number of an element?
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hope this helps :)

8 0
3 years ago
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Calculate the concentration of all ions present in each of the following solutions of strong electrolytes. a. 0.100 mole of Ca(N
pickupchik [31]

Answer:

[Ca²⁺] = 1M

[NO₃⁻] = 2M

Explanation:

Calcium nitrate dissociates in water as follows:

Ca(NO₃)₂ ⇒ Ca²⁺ + 2NO₃⁻

The moles of Ca²⁺ can be found using the molar relationship between Ca(NO₃)₂ and Ca²⁺

(0.100mol Ca(NO₃)₂) (Ca²⁺ /Ca(NO₃)₂) = 0.100 mol Ca²⁺

The concentration of Ca²⁺  is then:

[Ca²⁺] = n/V = (0.100mol)/(100.0mL) x (1000ml)/(1L) = 1M

Similarly, moles of NO₃⁻ can be found using the molar relationship between Ca(NO₃)₂ and NO₃⁻:

(0.100mol Ca(NO₃)₂) (2NO₃⁻/Ca(NO₃)₂) = 0.200 mol NO₃⁻

The concentration of NO₃⁻ is then:

[NO₃⁻] = (0.200mol)/(100.0mL) x (1000ml)/(1L) = 2M

6 0
3 years ago
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