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3 years ago

Is Fe a element or a compound?

2 answers:

8 0

Fe is an element
Aluminum is an element
HCl is a compound
Hydrogen Peroxide is a compound
I think H2 is an element
NaOH is a compound

allochka39001 [22]3 years ago

5 0

Answer:

element

compound

Explanation:

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Which element has the greatest ionization energy?

suter [353]

Florine has the highest ionization energy due to the trend on the periodic table, going up and right the ionization energy will increase, francium being the lowest and helium the highest.

5 0

3 years ago

For the following Chemical Reaction : 2HBr(aq)+BaOH2(aq)-->2H2O(l)BaBr2(aq) .. write the ionice equation, including phases.

victus00 [196]

Step 1)
write out all aqueous compounds as ions
2H+ (aq) + 2Br- (aq) + Ba2+ (aq) + 2OH- (aq) --> 2H2O (l) + Ba2+ (aq) + 2Br- (aq)

Step 2)
Cross out the spectator ions (ions that appear on both sides of the reaction) 2H+ (aq) + 2OH- (aq) --> 2H2O (l)
what you have left is the net ionic equation.
I hope this helped.

8 0

3 years ago

The atomic mass for Mg is O 55 O 54 O 60

Ivenika [448]

The answer is 60 (C)

3 0

4 years ago

Anyone , help with these chemistry questions

postnew [5]

2) 1
3) 1
4) 2
5) 3 or 2, I’m not sure
6) 1
7) 2
8) 1
9) 4
10) 2
11) 3
12) 1
I hope this helps, good luck.

4 0

3 years ago

Suppose two 200.0-L tanks are to be filled separately with the gases helium and hydrogen. What mass of each gas is needed to pro

Aneli [31]

Answer:

Mass of helium = 4426.9524 g

Mass of hydrogen gas = 2213.4762 g

Explanation:

Pressure = 135 atm

Temperature = 24 °C

Volume = 200 L

Number of moles = ?

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T₁ = (24 + 273.15) K = 297.15 K

Using ideal gas equation as:

PV=nRT

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

135 atm × 200 L = n × 0.0821 L.atm/K.mol × 297.15 K

⇒n = 1106.7381 moles

For helium gas:

Molar mass = 4 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$1106.7381= \frac{Mass}{4}$

$Mass= 4426.9524\ g$

For hydrogen gas:

Molar mass = 2 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$1106.7381= \frac{Mass}{2}$

$Mass= 2213.4762\ g$

4 0

3 years ago