What happens when an atom gains an electron

How many molecules of HCI would react with 1 mol of MgO?

olganol [36]

Answer:

C.

Explanation:

MoleculesHcl = (1 molMgO/1)(2molHCL/1molMGO)(6.02x10^23/1molHCL) = 1.204x10^24

4 0

3 years ago

Explain why compressional waves are unable to move through vacuum

AnnyKZ [126]

Can travel through most media including a vacuum. The electromagnetic ...Transverse waves are unable to pass through liquids or gases.

4 0

4 years ago

Read 2 more answers

The rate constants of some reactions double with every 10-degree rise in temperature. Assume that a reaction takes place at 295

LUCKY_DIMON [66]

Answer : The activation energy for the reaction is, 51.9 kJ

Explanation :

According to the Arrhenius equation,

$K=A\times e^{\frac{-Ea}{RT}}$

or,

$\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

$K_1$ = rate constant at 295 K

$K_2$ = rate constant at 305 K = $2K_1$

Ea = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = 295 K

$T_2$ = final temperature = 305 K

Now put all the given values in this formula, we get:

$\log (\frac{2K_1}{K_1})=\frac{Ea}{2.303\times 8.314J/mole.K}[\frac{1}{295K}-\frac{1}{305K}]$

$Ea=51879.96J=51.9kJ$

Therefore, the activation energy for the reaction is, 51.9 kJ

8 0

4 years ago

Why are the trends and exceptions to the trends in ionization energy observed? Check all that apply. -Ionization energy tends to

Annette [7]

Answer:

Trends across a Period ... properties to structure, the chemical changes, the trends and patterns in the Periodic ... Strong emphasis will be placed on chemical energy changes to finally ... charged particles (ions) or groups of atoms (molecules). ... As the magnetic field is gradually increased, the separated ions are detected ...

Explanation:

Trends across a Period ... properties to structure, the chemical changes, the trends and patterns in the Periodic ... Strong emphasis will be placed on chemical energy changes to finally ... charged particles (ions) or groups of atoms (molecules). ... As the magnetic field is gradually increased, the separated ions are detected ...

3 0

3 years ago

Why is water considered the universal solvent?

viva [34]

Answer:

C.

Explanation:

Because of waters chemical composition and physical attributes water is able to dissolve more things than any other liquid that we know of.

4 0

3 years ago