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2 years ago

Liquids and gases have all of the following characteristics except which one?

Chemistry

1 answer:

velikii [3]2 years ago

5 0

Their molecules move at different speeds

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Which of the following elements is the most reactive?<br> c, s,f, or as

makkiz [27]

I would say as, Arsenic

3 0

3 years ago

Read 2 more answers

12. A helium-filled weather balloon has a volume of 2.4 x 102 L at 99 kPa pressure and a

Luba_88 [7]

Answer:

The answer to your question is 8.74 g of He

Explanation:

Data

V = 2.4 x 10² L

P = 99 kPa

T = 0°C

mass = ?

Process

1.- Convert kPa to atm

P = 99 kPa = 99000 Pa

1 atm --------------- 101325 Pa

x --------------- 99000 Pa

x = (99000 x 1) / 101325

x = 0.977 atm

2.- Convert temperature to °K

°K = 273 + 0

°K = 273

3.- Substitution

PV = nRT

- Solve for n

n = PV / RT

n = (0.977)(2.4 x 10²) / (0.082)(273)

n = 24.48 / 22.386

n = 1.093 moles

4.- Calculate the grams of He

8 g -------------------- 1 mol

x -------------------- 1.093 moles

x = (1.093 x 8) / 1

x = 8.74 g

6 0

3 years ago

Read 2 more answers

What is the correct equation for the reaction quotient of the following reaction? 2Fe3+(aq) + Zn(s) ⇌ 2Fe2+(aq) + Zn2+(aq)

Ira Lisetskai [31]

Explanation:

A reaction quotient is defined as the ratio of concentration of products over reactants raised to the power of their stoichiometric coefficients.

A reaction quotient is denoted by the symbol Q.

For example, $2Fe^{3+}(aq) + Zn(s) \rightleftharpoons 2Fe^{2+}(aq) + Zn^{2+}(aq)$

The reaction quotient for this reaction is as follows.

Q = $\frac{[Fe^{2+}]^{2}[Zn^{2+}]}{[Fe^{3+}]^{2}}$

[Zn] will be equal to 1 as it is present in solid state. Therefore, we don't need to write it in the reaction quotient expression.

3 0

2 years ago

Please answer the question

Tom [10]

Answer:

Stamens

Explanation:

7 0

2 years ago

(a) The original value of the reaction quotient, Qc, for the reaction of H2(g) and I2(g) to form HI(g) (before any reactions tak

Taya2010 [7]

Answer:

Here's what I get

Explanation:

Assume the initial concentrations of H₂ and I₂ are 0.030 and 0.015 mol·L⁻¹, respectively.

We must calculate the initial concentration of HI.

1. We will need a chemical equation with concentrations, so let's gather all the information in one place.

H₂ + I₂ ⇌ 2HI

I/mol·L⁻¹: 0.30 0.15 x

2. Calculate the concentration of HI

$Q_{\text{c}} = \dfrac{\text{[HI]}^{2}} {\text{[H$_{2}$][I$_{2}$]}} =\dfrac{x^{2}}{0.30 \times 0.15} = 5.56\\\\x^{2} = 0.30 \times 0.15 \times 5.56 = 0.250\\x = \sqrt{0.250} = \textbf{0.50 mol/L}\\\text{The initial concentration of HI is $\large \boxed{\textbf{0.50 mol/L}}$}$

3. Plot the initial points

The graph below shows the initial concentrations plotted on the vertical axis.

7 0

3 years ago