Calculate the number of moles present in 25.0g of NaCl.
Find the molar mass of NaCl. 22.99g/mol + 35.45g/mol= 58.44g/mol Divide the given 25.0g of NaCl by the molar mass. You are left with mol once the grams cancel. 25.0g/ (58.44g/mol)= .428 mol NaCl
What structure in the respiratory system is stabilized by rings of cartilage, allowing air to pass through?
Solve for x: [3(x+2)]/4=6
Multiply each side of the equation by 4 to get rid of the fraction. 3(x+2)=24 Distribute the 3. 3x+6=24 Subtract 6 from each side. 3x=18 Divide each side by 3. x=6