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3 years ago

(08.04 MC)

Chemistry

1 answer:

Veronika [31]3 years ago

5 0

Answer:

Both have a pH greater than 7, but NH₃ has a lower pH than KOH.

Explanation:

Both of NH₃ and KOH are bases (can produce OH⁻), so both have a pH greater than 7.

NH₃ is considered as a weak base (not completely ionized), while KOH is a strong base (completely ionized).

If both NH₃ an KOH has the same concentration, KOH produces OH⁻ higher than that of NH₃.

So, NH₃ has a lower pH than KOH.

Thus the right choice is:

Both have a pH greater than 7, but NH₃ has a lower pH than KOH.

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What is c4??????? will give brainliest if right

Lena [83]

C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C, which uses RDX as its explosive agent. C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical.

The explosive material in C-4 is cyclotrimethylene-trinitramine (C3H6N6O6), commonly called RDX (which stands for "royal demolition explosive" or "research development explosive").

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4 years ago

What is the concentration of a solution with 2.00 moles of solute in 4.00 l of solution?

jarptica [38.1K]

Explanation:

Molarity is defined as the the number of moles present in a solution divided by volume in liters.

Mathematically, Molarity = $\frac{/text{no. of moles}}{volume in liter}$

As it is given that number of moles present into the solution are 2.00 moles and volume is 4 liter. Therefore, calculate the molarity of solution as follows.

Molarity = $\frac{/text{no. of moles}}{volume in liter}$

= $\frac{2.00 moles}{4.00 L}$

= 0.5 M

Thus, we can conclude that the concentration of given solution is 0.5 M.

6 0

3 years ago

When a nonmetal bonds with a nonmetal it is a _ bond

Karolina [17]

It is a covalent bond

3 0

4 years ago

What is the effect of decreasing the volume of the reaction mixture? What is the effect of decreasing the volume of the reaction

fgiga [73]

Answer:

By decreasing the volume, the equilibrium will shift to the side with the smallest amount of particles

Explanation:

Step 1: Data given

The principle of Le Chatelier says:

When the volume is decreased, the equilibrium will shift to the side of the smallest number of particles.

2NOBr(g) ⇌ 2NO(g)+Br2(g)

In the following example, we have 2 moles of NOBr (on the left side) and 3 moles of gas on the right side. This means the left side, the reactant side, has the smallest number of particles.

The equilibrium will here shift to the left side, the side of NOBr.

In the following example

2NO2(g) ⇌ N2O4(g)

We have 2moles of NO2 on the left side and 1 mol of N2O4 on the right side.

By decreasing the volume, the equilibrium will shift to the side of the smallest number of moles. Here this is the right side, the side of N2O4.

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4 years ago

Iron (III) oxide reacts with solid carbon in the followed reaction: 2Fe2O3(s) + 3C(s) → 4Fe(s) + 3CO2(g) What mass of Fe2O3 is n

Veseljchak [2.6K]

953.6 g of iron (III) oxide (Fe₂O₃)

Explanation:

We have the following chemical reaction:

2 Fe₂O₃ (s) + 3 C (s) → 4 Fe (s) + 3 CO₂ (g)

We calculate the number of moles of CO₂ by using the following formula:

pressure × volume = number of moles × gas constant × temperature

number of moles = (pressure × volume) / (gas constant × temperature)

number of moles of CO₂ = (2.1 × 100) / (0.082 × 300)

number of moles of CO₂ = 8.54 moles

Taking in account the chemical reaction we devise the following reasoning:

if 2 mole of Fe₂O₃ produces 3 mole of CO₂

then X moles of Fe₂O₃ produces 8.54 mole of CO₂

X = (2 × 8.54) / 3 = 5.69 moles of Fe₂O₃

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of Fe₂O₃ = 5.69 × 160 = 953.6 g

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number of moles

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6 0

3 years ago

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