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weqwewe [10]
3 years ago
14

When Pb and AlCl3 react together, lead (Pb) can replace aluminum (Al) in the compound because lead is lower on the activity seri

es. T/F
Chemistry
2 answers:
Andre45 [30]3 years ago
8 0
False. Pb is lower than Al in the reactivity series. It cannot replace aluminium in AlCl3
jeka57 [31]3 years ago
3 0

<u>Answer:</u> The correct answer is False.

<u>Explanation:</u>

Single displacement reactions are defined as the reactions in which more reactive element replaces a less reactive element from its chemical reaction.

A+BC\rightarrow AC+B

A is more reactive element than reactive B.

The reactivity of metals is judged by the series known as reactivity series. Elements lying above in the series are more reactive than the elements lying below in the series.

For the reaction between lead and aluminium chloride, the reaction does not take place because lead lies below in the reactivity series than aluminium. Hence, lead cannot displace aluminium from its chemical reaction.

Pb+AlCl_3\rightarrow \text{No reaction}

Hence, the correct answer is False.

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Gaseous compound Q contains only xenon and oxygen. When a 0.100 g sample of Q is placed in a 50.0-mL steel vessel at 0 C, the pr
Paladinen [302]

The question is incomplete, here is the complete question:

Gaseous compound Q contains only xenon and oxygen. When a 0.100 g sample of Q is placed in a 50.0-mL steel vessel at 0°C, the pressure is 0.230 atm. What is the likely formula of the compound?

A. XeO

B. XeO_4

C. Xe_2O_2

D. Xe_2O_3

E. Xe_3O_2

<u>Answer:</u> The chemical formula of the compound is XeO_4

<u>Explanation:</u>

To calculate the molecular weight of the compound, we use the equation given by ideal gas equation:

PV = nRT

Or,

PV=\frac{w}{M}RT

where,

P = Pressure of the gas = 0.230 atm

V = Volume of the gas  = 50.0 mL = 0.050 L     (Conversion factor:  1 L = 1000 mL)

w = Weight of the gas = 0.100 g

M = Molar mass of gas  = ?

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = Temperature of the gas = 0^oC=273K

Putting value in above equation, we get:

0.230\times 0.050=\frac{0.100}{M}\times 0.0821\times 273\\\\M=\frac{0.100\times 0.0821\times 273}{0.230\times 0.050}=194.9g/mol\approx 195g/mol

The compound having mass as calculated is XeO_4

Hence, the chemical formula of the compound is XeO_4

5 0
4 years ago
Suppose that you add 24.3 g of an unknown molecular compound to 0.250 kg of benzene, which has a K f of 5.12 oC/m. With the adde
pochemuha

Solution :

We know that :

$\Delta T_f = k_f.m$  and   $m=\frac{w_2}{m_2 \times w_1}$

Then, $\Delta T_f = k_f.\frac{w_2}{m_2.w_1}$   ..................(1)

Where,

w_1 = amount of solvent (in kg)

w_2 = amount of solute (in kg)

m_2 = molar mass of solute (g/mole)

m = molality of solution (mole/kg)

Given :

\Delta T_f = 3.14\ ^\circ C,   k_f= 5.12\ ^\circ C/m

                              =5.12 \ ^\circ C/mole/kg

                              =5.12 \ ^\circ C \ kg/mole

w_1 = 0.250 kg,  w_2 = 24.3 g

Then putting this values in the equation is (1),

$3.14 = \frac{5.12 \times 24.3}{m_2 \times 0.250}$

$m_2 = \frac{5.12 \times 24.3}{3.14 \times 0.250}$

m_2= 158.49  g/mole

So, the molar mass of the unknown compound is 158.49 g/mole.

7 0
3 years ago
Pls help plsssssssss
kumpel [21]

Answer:

a.)

=》CH4 + 2 O2 -> CO2 + 2 H2O

b.)

=》Mg3N2 + 6 H2O -> 3 Mg(OH)2 + 2 NH3

i hope it's correct !!

" kaul "

4 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST !!!The variables for this experiment include temperature, surface area, and the time required for the react
DedPeter [7]
The independent variables, the ones that are intentionally manipulated, are

A) temperature and surface area



The dependent variable, the one that you measure the response in, is

C) reaction time .
4 0
4 years ago
Read 2 more answers
Write an explanation that describes the cause and effect relationship between waves and the media they travel through that cause
irina [24]

Answer:

In physics, refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.

Explanation:

8 0
3 years ago
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