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pentagon [3]
4 years ago
15

Do all substances have melting points ? why or why not ? give two examples from the text

Biology
1 answer:
Pachacha [2.7K]4 years ago
4 0

Explanation:

The melting point is the temperature at which solid substance turns to a liquid phase. However, not all substances observe this change in phase. Some sublimate- which is the turning from solid to gas without transiting the liquid phase. Such substances are; dry ice (solid CO2), arsenic, naphthalene, and iodine.

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Which best describes the direction of heat?
Andrei [34K]

Answer: Heat ---from a warmer substance to a cooler substance

Explanation: Heat can be transferred from a hotter substance to a cooler substance. This can be done through three methods;

Conduction, Convention, Radiation

Conduction- When substance is been heated movement of particles increases causing collision between hotter particles and cooler particles. This continue until the temperature is in equilibrium. Metal is a good conductor of heat.

Convention- It is often associated with liquid and gases. hotter area of liquid moves and meet with cooler liquid. The cooler liquid then takes place of the hotter liquid until equilibrium is attain. This occurs while boiling water

Radiation - It doesn't need a means of transmission. It is gotten from infared emission. Infared emission increases when temperature increases .

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4 years ago
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Which feature do both roundworms and segmented worms have?
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<span>They have a one-way digestive system. Hope this helps!</span>
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3 years ago
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When is phosphate is removed from a molecule
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During a proccess called <span>hydrolysis. Hope this helps.</span>
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3 years ago
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Which coefficients balance this equation? _CH4 + _O2 -&gt; _CO2 + _H2O A. 1, 1, 1, 1 B. 1, 1, 2, 1 C. 1, 2, 1, 2 D. 2, 1, 2, 1
ICE Princess25 [194]
C. 1,2,1,2 
 
1 CH4+ 2 O2= 1 CO2+ 2 H20.

when balancing, you need to make sure that each side has the same number of each atom. The reason for this is to abide by the law of conservation of mass; essentially you can't have more or less than you put in the equation. 

When you put the coefficients of C. into the equation you have a total of 2 carbon atoms on each side, 4 hydrogen atoms, and 4 oxygen atoms.


4 0
3 years ago
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Your employer let’s you know that the safety data sheets are located on an computer in his office. Does this comply with employe
oksian1 [2.3K]

Answer:

The answer to the enunciated: your employer lets you know that the safety data sheets are located on a computer in his office. Does this comply with employer responsibilities? is:- This act doesn't comply with the responsibilities of the employer.

Explanation:

The responsibilities of the employer are to guide the employed about the things in the company, of the sentence you can deduct two sceneries:

- The employed is in training in the company, the reason why the employer is saying to him where are the safety data sheets, but the correct would be to show the sheets and how function them.

- The safety data sheets are reserved for people with a high rank in the company, the reason why the employer must not say it to the employed.

8 0
3 years ago
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