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2 years ago

How many atoms of hydrogen are in 0.56 mol of (NH4)2SO4

Chemistry

1 answer:

matrenka [14]2 years ago

3 0

You would have 6 hydrogen atoms four in brackets and then add the two outside the brackets

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Suppose a system of two particles, represented by circles, have the possibility of occupying energy states with 0, 10, or 20 J.

MrMuchimi

Answer:

Explanation:

The possible energy states for the particles are 0, 10 and 20 J.

The constraint in the system is that the total energy of the particles must be 20 J.

One given configuration where the total energy is 20 J is if both the particles occupy the 10 J state.

Hence, (10;10) is the given configuration.

Another possibility is if one of the particle is in 0 J state and another is in 20 J state. Hence, the system has a total energy of 0+20 = 20 J.

Hence, the possible configuration can be written as (0;20) or (20;0) which are energetically equivalent to the given configuration. Note that if the circles are indistinguishable, then the configuration (0,20) and (20,0) is the same thing.

4 0

2 years ago

At 1173 K, Keq = 0.0108 for the following reaction: CaCO3(s) ⇄ CaO(s) + CO2(g) The reaction takes place in a 10.0 L vessel at 11

maxonik [38]

Answer:

The amount of calcium carbonate will increase.

Explanation:

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

K>Q , reaction will move forward by making more product.
K<Q , reaction will move backward by making more reactant.

$CaCO_3(s)\rightleftharpoons CaO(s) + CO_2(g)$

Equilibrium constant of the reaction = $K_{eq}=0.0108$

Concentration of $CaO=\frac{15.0 g}{56 g/mol\times 10.0L}=0.027 M$

Concentration of $CO_2=\frac{4.25 g}{44 g/mol\times 10.0L}=0.0096 M$

Concentration of $CaCO_3=\frac{15.0 g}{100 g/mol\times 10.0L}=0.015 M$

$Q=\frac{[CaO][CO_2]}{[CaCO_3]}$

$=\frac{0.027 mol/L\times 0.0096 mol/L}{0.015 mol/L}=0.0174$

$K_{eq}$

This means that equilibrium will move in backward direction by which amount of calcium carbonate will increase.

4 0

3 years ago

For the chemical reaction 2 HBr ( aq ) + Ba ( OH ) 2 ( aq ) ⟶ 2 H 2 O ( l ) + BaBr 2 ( aq ) 2HBr(aq)+Ba(OH)2(aq)⟶2H2O(l)+BaBr2(a

Katen [24]

Answer:

2H+ (aq) + 2OH-(aq)→ 2H2O (l)

Explanation:

Step 1: the balanced equation

2HBr(aq) + Ba(OH)2(aq) ⟶ 2H2O(l)+BaBr2(aq)

Step 2: The net ionic equation

The net ionic equation, for which spectator ions are omitted - remember that spectator ions are those ions located on both sides of the equation - will , after canceling those spectator ions in both side (Ba^2+ and Br-), look like this:

2H+ (aq) + 2OH-(aq)→ 2H2O (l)

7 0

2 years ago

Calculate the number of grams of Cl2 formed when 0.115 mol HCl react with O2-

WINSTONCH [101]

The number of grams of Cl2 formed when 0.115 moles of HCl react with O2 is calculated as follows

write the chemical equation

4HCl + O2 -----> 2H2O + 2Cl2

if 0.115 moles of HCl reacted and from the equation above the reacting ratio between HCl and Cl2 is 4:2 therefore the moles of Cl2= 0.115 x2/4=0.0575moles

mass of Cl2= moles x molar mass of Cl2(35.5 x2=71g/mol)

=0.0575 moles x71g/mol = 4.0825 grams

4 0

3 years ago

"Calculate the amount of energy it will take to change 20.0 Grams of Water from -3 C to changing it all to vapor at sea level. S

ArbitrLikvidat [17]

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7 0

2 years ago