01/28/21

What kind of reaction is this? Synthesis, Decomposition, Single Displacement, Double Displacement, etc.

What type of reaction is Beryllium and Hydrochloric Acid?
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01/28/21

If a 24mL solution containing 2.0M HCl is mixed with a 40mL solution containing 0.25M Ca(OH)2. What is the pH of the resulting mixture? (pH = -log[H+]) Show ALL steps ON PAPER
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01/28/21

What would the scientific notation with proper significant figures be for this calculation?
I've tried a variety of ways and somehow keep getting the significant figures incorrectly.(34.123 + 6.90)divided by(98.7654 - 5.126)I initially thought it would be 4.38 x 10 (exponent -1) - unsure... more
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01/28/21

Predict and balance the equation WITH THE STATES: FeSO4 (aq) +KCl (aq) = ?. Then give the complete ionic equation along with the net ionic equation. Then give the spectator ions.

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01/28/21

120.0 g of sulfuric acid are added to 230.0 g of barium peroxide. Which reactant is in excess and by how much? How much barium sulfate is precipitated in this reaction?

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01/28/21

Calculate the heat change in joules for freezing 295 g of water at 0c
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01/27/21

Need help!!! A solution is made from 1.4×10−3 M in Zn(NO3)2 and 0.180 M in NH3.
After the solution reaches equilibrium, what concentration of Zn2+(aq) remains?Kf = [Zn(NH3)4]2+)=2.8×109.
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01/27/21

Finding moles of ions vs. how many ions in a compound
How many ions are in 6.0 moles of Fe(NO3)2? There are only 3 ions in this molecules?6.0 mol Fe(NO3)2 x 6.02x10^23 molecule Fe(NO3)2 / 1 mol Fe(NO3)2 x 3 ions / 1 molecules Fe(NO3)2ans: 1.1 x... more
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01/27/21

For the reaction below, Kc = 1.10 × 10⁻⁴. What is the equilibrium concentration of C if the reaction begins with 0.200 M A and 0.150 M B? 2 A (aq) + B (aq) ⇌ C (aq)
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01/27/21

For the reaction: 2 A (g) + B (s) ⇌ 2 C (s) + D (g) At 298 K in a 10.0 L vessel, the equilibrium values are as follows: 0.721 atm of A, 4.18 mol of B, 6.25 mol of C, and 8.75 atm of D.

What is the value of the equilibrium constant?
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01/27/21

If Kc = 0.0028 for the reaction below at 298 K, then what is the value of Kp? 3 A (g) + B (g) ⇌ C (g) + D (g)
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01/27/21

Calculate the heat energy released when 22.6 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point.
Constants for mercury at 1 atmheat capacity of Hg(l) 28.0 J/(mol⋅K)melting point 234.32 K enthalpy of fusion2.29 kJ/mol
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01/27/21

Two 20.0 g ice cubes at −11.0 ∘C are placed into 265 g of water at 25.0 ∘C.

Assuming no energy is transferred to or from the surroundings, calculate the final temperature, 𝑇f, of the water after all the ice melts.
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01/27/21

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 283.0 Torr at 45.0 ∘C. Calculate the value of Δ𝐻∘vap for this liquid.
Calculate the normal boiling point of this liquid.
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01/27/21

Convert the following into correct scientific notation:
I got the numbers right, but not the correct powers.a) 445.5 X 104 I got 4.455 X 10 to the? It is not 4 and it is not 2b) 7804.7 X 10-6 I got 7.8047 X 10 to the? It is not -6 and it is not 3c)... more
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01/27/21

Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction NH4HS(s)⇌NH3(g)+H2S(g) This reaction has a Kp value of 0.120 at 25 ∘C.

An empty 5.00-L flask is charged with 0.350 g of pure H2S(g), at 25 ∘C.What is the initial pressure of H2S(g) in the flask?
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01/27/21

Determine the value of the equilibrium constant, Kgoal, for the reaction:
N2(g)+O2(g)+H2(g)⇌1/2 N2H4(g)+NO2(g) N2(g)+O2(g)⇌2NO(g), K1 = 4.10×10^−31 N2(g)+2H2(g)⇌N2H4(g), K2 = 7.40×10^−26 2NO(g)+O2(g)⇌2NO2(g) , K3 = 6.00×10−13 i know its (K1 * K2... more
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01/27/21

Calculate the formation constant for the formation of [Cu(NH3)2(H2O)4]2+ from [Cu(H2O)6]2+, given that ΔG∘ is −44.7kJ⋅mol−1 at 298 K.
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01/27/21

Help Please: CHE
Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00 g sample of each compound. One sample contains 0.27 g of X and the other contains 0.36 g of X.Identify... more
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01/27/21

The following equilibria were obtained at 609 K:
The following equilibria were obtained at 609 K:CoO(s) + H2(g) ↔ Co(s) + H2O(g)   Kc = 77CoO(s) + CO(g) ↔ Co(s) + CO2(g)   Kc = 227Based on these equilibria, calculate the equilibrium constant... more
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01/27/21

A mixture of 0.119 mol of NO, 0.192 mol of H2, and 0.186 mol of H2O is placed in a 1.0 L reaction vessel at 300 K. The following equilibrium is established:
A mixture of 0.119 mol of NO, 0.192 mol of H2, and 0.186 mol of H2O is placed in a 1.0 L reaction vessel at 300 K. The following equilibrium is established:2NO(g) + 2H2(g) ↔ N2(g) + 2H2O(g)At... more
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01/27/21

chemistry partial pressure
In an experiment, 28.6mL of hydrogen gas were collected over water at a total pressure of 762 torr at a temperature of 15 C. If the vapor pressure of water at 15 C is 13 torr, what mass of hydrogen... more
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01/27/21

chemistry partial Pressure
a gas mixture used as an atmosphere for growing anaerobic bacteria contains 3.0% by mass of hydrogen and 97.0% by mass carbon dioxide, if the total pressure is 1.00 atm, what is the partial... more
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01/27/21

Chemistry partial pressure
if we place 2.00g of oxygen and 4.00g of methane gas in a 1.00L container at 50C, what would be the total pressure?
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01/27/21

What volume (in ml) of 0.8 M barium hydroxide would neutralize 50 ml of 2.709 M hydrobromic acid? Enter to 1 decimal place.
What volume (in ml) of 0.8 M barium hydroxide would neutralize 50 ml of 2.709 M hydrobromic acid?  Enter to 1 decimal place.
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