1.

1.Which of the following is true about all mixtures?

pochemuha

I believe the answers are

1) D

2) B

3 0

3 years ago

Lewis plot structure of Ca

Anna [14]

Answer:

Ca:

Explanation:

A Lewis structure shows the number of valence electrons about an atom.

Ca is in Group 2 of Period 4.

Its electron configuration is [Ar]4s².

Thus, Ca has two valence electrons and its Lewis structure is Ca:

8 0

3 years ago

Arrange the metals used in this experiment (including H2 and Ag) in order of decreasing reactivity (most reactive metal first).

jarptica [38.1K]

Answer:

Na, Ca, Mg, All, Zn, Fe, Sn, Pb, H2, Cu, Ag

Explanation:

This is how metals are arranged in the electrochemical series.

Use the following to remember the order:

King Nathan Can Manage All Zone Freely Since Probably He Can Handle All Ages

Each word represent the order

K, Na, Ca, Mg, All, Zn, Fe, Sn, Pb, H2, Cu, Hg, Ag, Au

6 0

4 years ago

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. $Xe_3O_2$

Answer: The chemical formula of the compound is $XeO_4$

Explanation:

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

What is the product of the reaction of hydrobromic acid and 2-bromo-1-butene in the presence of acid and ether?

sergejj [24]

Answer: The major product of the reaction between Hydrobromic Acid and 2-bromo-1-butene in the presence of ether and acid is 2,2-dibromobutane.

Explanation:

The mechanism of the reaction is supported by the Markovnikov's rule which explains that in the addition reaction of alkenes by hydrogen-halogen compounds, the incoming halogen substituent goes to the more substituted Carbon. It can also be stated that incoming hydrogen atom goes to the Carbon with more Hydrogen atoms.

The only case when the reverse of Markovnikov's rule takes place is when Hydrogen peroxide is present and the addition reagent is HBr.

This case is not like that and it simply follows the Markovnikov's rule.

I'll add an attachment of the reaction to this now.

6 0

4 years ago

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