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4 years ago

Select the single best answer. Predict the pH (> 7, < 7, or = 7) of a LiHCO3 solution.

Chemistry

1 answer:

tiny-mole [99]4 years ago

4 0

Answer:

LiHCO3 its PH >7

Explanation:

the real ph for it is 11.3 so it makes it more than 7

and if you know it is a conjugate base coming from the weak acid H2CO3 so LiHCO3 is a base

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How many H2 and O2 molecules do you need to make exactly 4 water molecules with no leftovers?

vlabodo [156]

You need 4 H2 molecules and 2 O2 molecules.
This is because water is H2O which is 2 Hydrogen and 1 Oxygen so if you want to make 4 water molecules, you’ll need 8 hydrogen and 4 oxygen.
Given H2 you need 4 because 4•2 is 8 and for O2 you need 2 because 2•2 is 4.
I hope this makes sense.

3 0

3 years ago

Determine the energy released per kilogram of fuel used. given mev per reaction, calculate energy in joules per kilogram of reac

tatuchka [14]

The energy released in nuclear reactions are far larger than that released in chemical reactions due to the release of nuclear energy from the nucleus.

<h3>Why is the energy released in a reaction?</h3>

Energy is released in a reaction due to the breaking of bonds are well as formation of bonds.

The quantity of energy released in reactions differs according to the reaction type involved.

When compared to chemical reactions, the energy released in nuclear reactions are very much higher because of the changes that occurs in the nucleus of the atoms involving nuclear energy.

The energy, E released in nuclear reactions is given by the formula below:

$E = mc^{2}$

where m is the mass of the substance and c is the speed of light.

Therefore, the energy released in nuclear reactions are far larger than that released in chemical reactions.

Learn more about nuclear reactions at: brainly.com/question/984564

6 0

2 years ago

The Ksp for CaF2 is 3.9 x 10-11 at 25oC. What is the solubility?

nevsk [136]

We have to know the solubility of CaF₂.

The solubility of CaF₂ is: (c) 2.1 x 10-4 Molar

The general expression of solubility product of any sparingly soluble salt (having solubility S) with formula $A_{x} B_{y}$ is: $x^{x} y^{y} S^{x+y}$ .

For the compound, CaF₂, x=1, y=2 So, $K_{sp}$ = $1^{1}2^{2}S^{1+2}$ =4S³= 3.9 x 10-11 (Given)

S³= $\frac{3.9 X 10^{-11} }{4}$

S³=9.75 X $10^{-12}$

S= 2.1 X $10^{-4}$ Molar

5 0

4 years ago

Read 2 more answers

What are three other elements that have 8 valance electrons.

Rina8888 [55]

8 valence electrons means that the element is stable. When we hear stable, we know the group to look at! Noble gases all have 8 valence electrons making them stable and have a full octet.

Here are some:-

Krypton
Argon
Neon

5 0

3 years ago

Read 2 more answers

A 1.2 L weather balloon on the

makkiz [27]

Answer:

330.95K

Explanation:

V₁ = 1.2L

T₁ = 25°C = (25 + 273.15)K = 298.15K

P₁ = 1.0 atm

P₂ = 0.74 atm

V₂ = 1.8L

T₂ =?

From combined gas equation,

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Solve for T₂

T₂ = (P₂ * V₂ * T₁) / (P₁ * V₁)

T₂ = (0.74 * 1.8 * 298.15) / (1.0 * 1.2)

T₂ = 397.1358 / 1.2

T₂ = 330.9465K

T₂ = 330.95K or T₂ = (330.95 - 273.15)°C = 57.8°C

8 0

3 years ago