How many grams of present in 2.1x1026 atoms of cesium?

46000 g Cs

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Reading a Periodic Table

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

2.1 × 10²⁶ atoms Cs

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Cs - 132.91 g/mol

Step 3: Convert

Set up:                       Divide/Multiply:                                                                                                

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

46348.6 g Cs ≈ 46000 g Cs

This scenario is called diffusion. particles are moving from regions of high concentration to low concentration.

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.