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nikitadnepr [17]
4 years ago
13

Which unit of pressure expresses standard atmospheric pressure as 1?

Chemistry
1 answer:
eduard4 years ago
8 0
One atmosphere or atm is STP.
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How much heat is required to melt 42.0 grams of water at 0*C?<br> Hurry...
Mnenie [13.5K]

Answer:

Heat required to melt 42 g if ice is 13,860 J

Explanation:

The amount of heat required to melt  grams of water at 0°C is given as follows;

The mass of the ice (water), m = 42 g

The latent heat of fusion of ice ΔH_f= 330 J/g

Therefore, heat required to melt 42 grams is given as follows;

Heat required to melt ice = Mass of the ice, m × The specific latent heat of fusion of the ice, ΔH_f

Heat required to melt 42 g if ice = m × ΔH_f = 42 g × 330 J/g = 13,860 J

Heat required to melt 42 g if ice = 13,860 J.

3 0
3 years ago
How can an atom that has five valence electrons achieve a full set of valence electrons?
kogti [31]
It can bond with another atom to gain 3 more valence electrons (-3)
8 0
3 years ago
A molecule in which the central atom forms three single bonds and has one lone pair is said to have a ________ shape.
nignag [31]

Answer : The correct option is, (c) pyramidal

Explanation :

As we are given that a molecule in which the central atom forms three single bonds and has one lone pair that means the central metal atom has 3 bond pairs and 1 lone pair of electrons.

There are total 4 electron pairs. So, the hybridization will be sp^3 and the electronic geometry of the molecule will be tetrahedral.

But as there are three atoms or bonds around the central atom and the fourth position occupied by lone pair of electrons. The repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be pyramidal.

Hence, correct option is, (c) pyramidal

5 0
3 years ago
Place the elements below in order of decreasing ionization energy. Aluminum(Al) Chlorine(Cl) Magnesium (Mg) Sulfur(S)
arlik [135]
Chlorine
Magnesium
Aluminum
Sulfur
7 0
3 years ago
Question 1
lisov135 [29]

Answer:

24+74+61+29+38+27+68+54= 375

then divide by the number of numbers in this case 8 so;

375/8= 46.875

<h2>that's the median 46.875</h2>

Explanation:

8 0
2 years ago
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