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crimeas [40]
3 years ago
5

A solid turning to a liquid is called..?

Chemistry
2 answers:
Vika [28.1K]3 years ago
8 0
The answer is physical change
sergey [27]3 years ago
5 0

Answer:

A physical change.

Explanation:

Have a wonderful day!

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Given the reaction: 2H₂ + O₂ → 2H₂O The total number of grams of O₂ needed to produce 54 grams of water is _________.
Vedmedyk [2.9K]

Answer : The mass of O_2 needed are, 48 grams.

Explanation :

First we have to calculate the moles of H_2O

\text{Moles of }H_2O=\frac{\text{Given mass }H_2O}{\text{Molar mass }H_2O}=\frac{54g}{18g/mol}=3mol

Now we have to calculate the moles of O_2

The given balanced chemical reaction is:

2H_2+O_2\rightarrow 2H_2O

From the reaction, we conclude that

As, 2 mole of H_2O produces from 1 mole of O_2

So, 3 mole of H_2O produces from \frac{3}{2}=1.5 mole of O_2

Now we have to calculate the mass of O_2

\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2

Molar mass of O_2 = 32 g/mole

\text{ Mass of }O_2=(1.5moles)\times (32g/mole)=48g

Therefore, the mass of O_2 needed are, 48 grams.

4 0
3 years ago
Do the ch3f molecules appear to attract each other much? briefly describe their interaction.
suter [353]

Neither attract much nor allows it be free.

How the molecules behave in such way?

Because fluorine has a higher electronegativity than carbon and hydrogen, CH3F possesses a non-zero dipole moment. As a result, fluorine draws a partial negative charge whereas other atoms (such as carbon or hydrogen) draw a partial positive charge, leading to a non-zero dipole moment in CH3F. Lewis' structure, CH3F, is made up of one carbon atom, three hydrogen atoms, and one fluorine atom. Carbon is the key atom in the CH3F lewis structure because it is the least electronegative. The CH3F lewis dot structure consists of 3 lone pairs and a total of 4 bound pairs.

Properties of CH3F

  • It molar mass is 34.03 g/mol.
  • The density of CH3F is 1.4397 g/L and 0.557 g/cm³ at saturated pressure and temperature.
  • The melting point of CH3F is -137.8ºC and the Boiling point is -78.4ºC.
  • Its vapor pressure is 3.3 MPa.
  • Its IUPAC name is Fluoromethane.

Know more about carbon here:

brainly.com/question/3049557

#SPJ4

7 0
2 years ago
PLEASE HELP
kotykmax [81]

Answer:

I think it's 5. But I'm not sure what you mean by right-hand side...

Explanation:

I really hope this helps you!

5 0
2 years ago
Please helpppp!!!!!!!!!!!
AVprozaik [17]

Answer:

If a substance can be dissolved it is called soluble.

if a substance cannot be dissolved it is called insoluble

8 0
3 years ago
Which household items would be considered a base?
Vadim26 [7]

Answer:

<h2>Household bases. Some household items that contain acids include: yogurt, vinegar,lemon juice, citric acid, apples, jelly, pineapples, cranberry sauce, milk, and batteries. Other items around the house that contain bases consist of Ammonia, drain cleaner, baking soda, chalk, toothpaste, Windex, bleach, laundry detergent, shampoo, and egg whites.</h2>

4 0
3 years ago
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