Sara63
Sara63
29-03-2015
Chemistry
Answered
Help with completing steps (photo attachted)
Answer :
Аноним
Аноним
29-03-2015
Step 1 is correct.
Step 2.
There are 2 Iron (Fe) atoms in the formula so we will multiply 2 with the relative mass of Fe .
[tex]2\cdot 56=112[/tex]
Relative mass of Iron atoms in the formula is 112 amu (atomic mass unit)
Step 3.
To find the percentage,
we will divide mass of iron to total mass and equal that to x divided to 100.
[tex]\frac { 112 }{ 160 } =\frac { x }{ 100 } \\ \\ 0.7=\frac { x }{ 100 } \\ \\ 0.7=\frac { 7 }{ 10 } =\frac { 70 }{ 100 } \\ \\ \frac { 70 }{ 100 } =\frac { x }{ 100 } \\ \\ x=70[/tex]
Total mass of iron is 70% of the total mass of the formula.
Answer Link
VIEW ALL ANSWERS ( 18+ )
Other Questions
Given that [tex]\frac{a}{b} = \frac{2}{5}[/tex] and [tex]\frac{b}{c} = \frac{3}{4}[/tex], find [tex]a: b: c[/tex].
A line passes through the points [tex]\((7, 10)\)[/tex] and [tex]\((7, 20)\)[/tex]. Which statement is true about the line?A. It has a slope of zero because [te
Find the z value to the right of the mean so that 98.84% of the area under the distribution curve lies to the left of it
The procedure that records the electrical activity of muscles is:A. MRI B. EMG C. DEXA D. TKR
Which shows the following expression after the negative exponents have been eliminated?[tex]\[ \frac{x y^{-6}}{x^{-4} y^2}, \quad x \neq 0, \, y \neq 0 \][/tex]
Mi amigo es ______ guapo como yo. tan tanto mayor menor
100 points Marielis is building a structure out of wood. She will build the rectangular frame out of wood and insert a wood brace along onediagonal, as shown i
Type the correct answer in the box. Spell all words correctly.Bitmap images commonly use the RGB color space. What does the acronym RGB represent?RGB stands for
The gravitational force between the Earth and a certain satellite is 243 N. If the satellite drifted further away from Earth to a distance 4 times the original
The hypotenuse of an isosceles triangle measures 10 inches long. What is the length of one leg of the triangle?A. [tex]\(\frac{10}{\sqrt{3}}\)[/tex]B. [tex]\(\f
Chaplin and Hitler were born within a week of one another.
The typographic symbols used in computer-mediated communication (CMC) to convey a variety of emotions, like a smiley face, are called which of the following? Mu
What could be a possible cause of a sudden, sharp pain in the left side of the chest that resolves quickly?A) CostochondritisB) Muscle strainC) PleurisyD) Angin
Identify FunctionsIn which of the relations represented by the tables below is the output a function of the input?Select all that apply:[tex]\[ \begin{tabular}{
What is the equation of a line, in standard form, perpendicular to the line [tex] y=\frac{4}{3} x-16 [/tex] that goes through the point [tex] (1,-9) [/tex]?A. [
Abstract Noun ofdecide
If a, b, c, d and e are all non-negative integers, how many solutions are there to the equation a + b + c + d + e = 43, if a ≥ 0, 4 < b ≤ 8, c ≥ 0, d ≥ 5, e
1. Solve the system of linear equations:[tex]\[ 3n + 2y = 1 \][/tex][tex]\[ 4m - 5y = -14 \][/tex]using:a) inversesb) determinants
Which phrase refers to the continued decline and straying from marriage?A. deinstitutionalizationB. retreat from marriageC. marriage promotionD. diversity in ma
Which of the following sentences exemplifies the BEST way to introduce the new word, saunter? a) "The giraffe sauntered around the African Plains." b) "You need