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erik [133]
3 years ago
14

What is the heat in joules required to convert 75.0 grams of water into steam if the ^Hvap of water is 2257j/g?

Chemistry
1 answer:
nikitadnepr [17]3 years ago
7 0

169 000 J. It takes 169 000 J to convert 75.0 g of water to steam.

<em>q</em> = <em>m</em>Δ<em>H</em>vap = 75.0 g x (2257 J/1 g) = 169 000 J

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What does it mean to say that the electric current from a wall socket is “120 V AC”?
patriot [66]
I don't know what you are asking but AC= Alternative current
V= Volt
5 0
3 years ago
HELPPPPPP 30 POINTS Scientists are currently debating if a new epoch based on modern human activity should be added to the geolo
Margarita [4]

Answer:

Anthropocene

Explanation:

Anthropocene epoch is sort of unofficial epoch that scientists have used to describe basically human made impact on geological scale.

here's more info:

https://www.earthsystems.com/the-anthropocene/

3 0
2 years ago
0.056 g/s = ? g/min
Dvinal [7]
It should be 3.36 g / min but i m not sure
3 0
3 years ago
A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an el
icang [17]

Answer:

The temperature of the air at this given elevation will be 53.32425°C

Explanation:

We can calculate the final temperature through the combined gas law. Therefore we will need to know 1 ) The initial volume, 2 ) The initial temperature, 3 ) Initial Pressure, 4 ) Final Volume, 5 ) Final Pressure.

Initial Volume = 1.2 L ; Initial Temperature = 25°C = 298.15 K ; Initial pressure = 1.0 atm  ; Final Volume = 1.8 L ; Final pressure = 0.73 atm  

We have all the information we need. Now let us substitute into the following formula, and solve for the final temperature ( T_2 ),

P_1V_1 / T_1 = P_2V_2 / T_2,

T_2 = P_2V_2T_1 / P_1V_1,

T_2 = 0.73 atm * 1.8 L * 298.15 K / 1 atm * 1.2 L = ( 0.73 * 1.8 * 298.15 / 1 * 1.2 ) K = 326.47425 K,

T_2 = 326.47425 K = 53.32425 C

7 0
3 years ago
When PCl5 solidifies it forms PCl4+ cations and PCl6– anions. According to valence bond theory, what hybrid orbitals are used by
Vlad1618 [11]

Answer:

sp³

Explanation:

Number of hybrid orbitals = ( V + S - C + A ) / 2

Where

H is the number of hybrid orbitals

V is the valence electrons of the central atom = 5

S is the number of single valency atoms = 4

C is the number of cations = 1

A is the number of anions = 0

For PCl₄⁺

Applying the values, we get:

H = ( 5+4-1+0) / 2

= 4

<u>This corresponds to sp³ hybridization.</u>

5 0
3 years ago
Read 2 more answers
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