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Anon25 [30]
3 years ago
15

What are two things that interact that determine if there is a phase change or not HELP

Chemistry
1 answer:
serg [7]3 years ago
3 0

Answer:

phase change always has two phases in contact during the change. melting => solid & liquid; evaporation (boiling) => liquid & vapor. If only one phase is present, then phase change is not occurring. Also, when two phases are in contact, no temperature changes occur. Only the pure phase demonstrates temperature change when measured. Example, when ice is added to water, at thermal equilibrium (temp = 0°C) the water temp will not continue to change. Only when all the ice has melted will the water temperature demonstrate a measured temperature change.

Explanation:

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Are the particles in a gas farther apart or closer together than the particles in a liquid? Use your answer to explain each of t
Mademuasel [1]

farther apart just look up states of matter :)

6 0
2 years ago
hydrogen-2 is also known as deuterium as well as hydrogen-3 is known as tritium hydrogen-1 is our common hydrogen isotope a samp
UkoKoshka [18]
H-1 only has 1 proton and 1 electron, so its mass number is 1.
H-2 has one more neutron so its mass number is 2
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average atomic mass = 1 x 99% + 2 x 0.8% + 3 x 0.2%
=1.012
6 0
4 years ago
How many Hydrogen atoms are there in 5 g of NH3? (molar mass of NH3 = 17<br>g/mol)​
goldfiish [28.3K]

Answer:5.309 × 10²⁴ atoms.

Explanation:

Given that

molar mass of NH3 = 17 g/mol

Mass of NH3 = 5g

Therefore, No of moles of NH3 = Mass/ molar mass

=  5g/ 17g/mol

= 0.294 moles.

I  mole = 6.02 × 10²³ atoms

Therefore  the number of hydrogen atoms in a 0.294 moles of ammonia  gives us

0.294× 6.02 × 10²³ × 3  ( since there are 3 hydrogens in Ammonia )

= 5.309 × 10²⁴ atoms.

5 0
3 years ago
Un mol de amoniaco Tiene una masa molar de 17 g y ocupa un volumen de 22.4 l qué volumen ocupa el 50 g amoniaco en condiciones n
mr_godi [17]

Answer:

V  = 65.81 L

Explanation:

En este caso, debemos usar la expresión para los gases ideales, la cual es la siguiente:

PV = nRT  (1)

Donde:

P: Presion (atm)

V: Volumen (L)

n: moles

R: constante de gases (0.082 L atm / mol K)

T: Temperatura (K)

De ahí, despejando el volumen tenemos:

V = nRT / P   (2)

Sin embargo como estamos hablando de condiciones normales de temperatura y presión, significa que estamos trabajando a 0° C (o 273 K) y 1 atm de presión. Lo que debemos hacer primero, es calcular los moles que hay en 50 g de amoníaco, usando su masa molar de 17 g/mol:

n = 50 / 17 = 2.94 moles

Con estos moles, reemplazamos en la expresión (2) y calculamos el volumen:

V = 2.94 * 0.082 * 273 / 1

<h2>V = 65.81 L</h2>
4 0
4 years ago
A blood test shows clumps only in wells containing anti-A and anti-B antibodies. The Rhesus test was negative. Which is the corr
enyata [817]
The correct blood type is AB-
3 0
3 years ago
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