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3 years ago

12

Name two other than chlorine (CI) that are likely to react with sodium (Na)

1 answer:

agasfer [191]3 years ago

4 0

F and O
because they are more reactive than Cl

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Explain the reason according to bohr atomic model why atomic emission spectra

damaskus [11]

<span> contain only certain frequencies of light. Each s sublevel is related to a spherical s orbital. ... </span>Bohr model<span>: the electron is a particle; they hydrogen </span>atom<span>has only certain allowable energy states. hope this helps

</span>

6 0

3 years ago

Una disolución contiene 50 gramos de KOH en 0.25 L de Determine la Molaridad de la disolución

snow_tiger [21]

Answer:

1. 3.56 M.

2. 0.99 M.

Explanation:

¡Hola!

1. En este caso, dado que la molaridad de una solution es calculada por medio de la siguiente ecuación:

$M=\frac{n}{V}$

Es posible calcular la molaridad de 50 gramos de hidróxido de potasio primero calculando las moles en dicha masa por medio de la masa molar:

$n=50.0gKOH*\frac{1molKOH}{56.11gKOH}=0.891molKOH$

Luego, dado el volumen de la solución, podemos calcular la molaridad:

$M=\frac{0.891mol}{0.25L}=3.56M$

2. En este segundo ejercicio, procedemos de la misma manera, pues primero calculamos las moles de nitrato de potasio:

$n=75gKNO_3\frac{1molKNO_3}{101.1gKNO_3}=0.742mol$

Luego, calculamos la molaridad justo como se hizo anteriormente:

$M=\frac{0.742mol}{0.35L} \\\\M=0.99M$

Best regards!

3 0

3 years ago

Consider a sample of 11.2 g of ice initially at 0.0 C. How much energy in kilojoules is required to melt the ice and warm it to

oksian1 [2.3K]

Answer:

1034.88J

Explanation:

Given that:

mass (m) = 11.2 g, initial temperature = 0°C, final temperature = 22°C, the specific heat capacity of water (C) = 4.2 J/g°C

Temperature difference (ΔT) = final temperature - initial temperature = 22 - 0 = 22°C

The quantity of heat (Q) required to melt the ice can be calculated from the equation:

Q = mCΔT

Q = 11.2 g × 4.2 J/g°C × 22°C

Q = 1034.88J

5 0

3 years ago

A laboratory bottle of helium gas occupies a volume of 2.0 L at 760 mm Hg. Calculate the new pressure if the

Fantom [35]

Answer:

<h2>844.4 mmHg</h2>

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

$P_1V_1 = P_2V_2$

Since we are finding the new pressure

$P_2 = \frac{P_1V_1}{V_2} \\$

From the question we have

$P_2 = \frac{2 \times 760}{1.8} = \frac{1520}{1.8} \\ = 844.4444...$

We have the final answer as

<h3>844.4 mmHg</h3>

Hope this helps you

8 0

3 years ago

Why is hydrogen placed in group one of the<br> periodic table?

Mice21 [21]

Answer:

Hydrogen has only 1 valence electron in its outermost shell.

Explanation:

6 0

4 years ago