Respuesta :

Space

Answer:

0.024 kg CaO

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Chemistry

Aqueous Solutions

  • Molarity = moles of solute / liters of solution

Atomic Structure

  • Reading a Periodic Tables
  • Using Dimensional Analysis

Explanation:

Step 1: Define

0.41 mol CaO

2.5 M Solution

Step 2: Identify Conversions

1000 g = 1 kg

Molar Mass of Ca - 40.08 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of CaO - 40.08 + 16.00 = 56.08 g/mol

Step 3: Convert

  1. Set up:                                [tex]\displaystyle 0.43 \ mol \ CaO(\frac{56.08 \ g \ Cao}{1 \ mol \ CaO})(\frac{1 \ kg \ CaO}{1000 \ g \ CaO})[/tex]
  2. Multiply:                              [tex]\displaystyle 0.024114 \ kg \ CaO[/tex]

Step 4: Check

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

0.024114 kg CaO ≈ 0.024 kg CaO

Neetoo

Answer:

0.172 Kg

Explanation:

Given data:

Kg of solvent = ?

Moles of solute = 0.43 mol

Molality = 2.5 m

Solution:

Formula:

m = moles / Kg of solvent

by putting values,

2.5 m = 0.43 mol / kg of solvent

Kg of solvent = 0.43 mol / 2.5 m

Kg of solvent = 0.172 Kg

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