All categories

4 years ago

Which gas sample at STP has the same total number of molecules as 2.0 liters of CO2(g) at STP?

Chemistry

2 answers:

Archy [21]4 years ago

7 0

The sample at STP that has the same total number of molecules as 2.0 liters of CO2(g) at STP is 2) 2.0 L of CI2 (g)

sukhopar [10]4 years ago

3 0

Avogadro's law states that the volume of a gas is proportional to the number of moles. Also, the number of moles is proportional to the number of molecules (based on Avogadro's constant). Therefore, if 2 gas samples have the same volume, the have the same number of molecules, and the only choice with the same volume of 2.0 L is choice (2).

You might be interested in

How many elements are in P4I10

artcher [175]

Answer:

Explanation:

P: Phosphorous

I: Iodine

Have a nice day

6 0

3 years ago

Question 5 of 10

lesya [120]

Chemical equation represents a redox reaction :

2Li + MgCl₂ → 2LiCl + Mg

<h3>Further explanation</h3>

The oxidation-reduction reaction or abbreviated as Redox is a chemical reaction in which there is a change in oxidation number

Reaction

2Li + MgCl₂ → 2LiCl + Mg

Oxidation is an increase in oxidation number, while reduction is a decrease in oxidation number.

Oxidation

$\tt Li\rightarrow Li^+(0~to~+1)$

Reduction

$\tt Mg^{+2}\rightarrow Mg(+2~to~0)$

5 0

3 years ago

How many atoms are in 57.5 liters of xenon gas at STP

TiliK225 [7]

Answer:

1.55 × 10²⁴ atoms Xe

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Table
Moles
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 57.5 L Xe at STP

[Solve] atoms Xe

Step 2: Identify Conversions

[STP] 22.4 L = 1 mol

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 57.5 \ L \ Xe(\frac{1 \ mol \ Xe}{22.4 \ L \ Xe})(\frac{6.022 \cdot 10^{23} \ atoms \ Xe}{1 \ mol \ Xe})$
[DA] Divide/Multiply [Cancel out units]: $\displaystyle 1.54583 \cdot 10^{24} \ atoms \ Xe$

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.54583 × 10²⁴ atoms Xe ≈ 1.55 × 10²⁴ atoms Xe

4 0

3 years ago

Which one is a true statement about endothermic reactions? A. I need you from an outside source is continuously being added. B.

tekilochka [14]

Correct answer: "A. Energy from an outside source is continuously being added."
An endothermic reaction is a reaction that is characterised by the system absorbing energy from its surroundings. That energy is usually in heat form. For example, when mixing water with potassium chloride, this reaction will absorb heat and the container will feel cold - endothermic reaction.

7 0

4 years ago

Read 2 more answers

Balance each of these equations.

Oksanka [162]

Answer:

A. 2NO + O2 -> 2NO2

B. 4Co + 3O2 -> 2Co2O3

C. 2Al + 3Cl2 -> Al2Cl6

D. 2C2H6 + 7O2 -> 4CO2 + 6H2O

E. TiCl4 + 4Na -> Ti + 4NaCl

8 0

3 years ago