What is salad dressing classified as

What mass of iron is formed when 10 grams of carbon react with 80 grams of iron iii oxide?

yKpoI14uk [10]

Answer:

55.85 grams of Fe is formed.

Explanation:

Identify the reaction:

2Fe₂O₃ + 3C → 4Fe + 3CO₂

Identify the limiting reactant, previously determine the mol of each reactant

(mass / molar mass)

10 g / 12 g/m = 0.83 moles C

80 g / 159.7 g /m = 0.500 moles Fe₂O₃

2 moles of oxide need 3 moles of C, to react

0.5 moles of oxide, will need ( 0.5 . 3)/ 2 = 0.751 mol

I have 0.83 moles of C, so C is the excess.

The limiting is the oxide.

3 mol of C need 2 mol of oxide to react

0.83 mol of C, will need (0.83 . 2)/ 3 = 0.553 mol of oxide, and I only have 0.5 (That's why Fe₂O₃ is the limiting)

Ratio is 2:4 (double)

If I have 0.5 moles of oxide, I will produce the double, in the reaction.

1 mol of Fe, will be produce so its mass is 55.85 g

5 0

3 years ago

Write the empirical formulas of the following compounds: (a) Al2Br6, (b) Na2S2O4, (c) N2O5, (d) K2Cr2O7, (e)H2C2O4.

babunello [35]

Answer:1. $AlBr_3$

2. $NaSO_2$

3. $N_2O_5$

4. $K_2Cr_2O_7$

5. $HCO_2$

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

1. $Al_2Br_6$ has empirical formula of $AlBr_3$

2. $Na_2S_2O_4$ has empirical formula of $NaSO_2$

3. $N_2O_5$ has empirical formula of $N_2O_5$

4. $K_2Cr_2O_7$ has empirical formula of $K_2Cr_2O_7$

5. $H_2C_2O_4$ has empirical formula of $HCO_2$

4 0

3 years ago

What sort of chemical hazard is thalidomide?

trapecia [35]

The hazard from thalidomide is that it can cause children to die or to be born with deformed limbs, often without limbs. That's why its use has been greatly reduced and is now only usable in treating certain types of cancers or leprosy.

3 0

3 years ago

Einstein's formula tells us the amount of energy to which a given mass would be equivalent, if it were all suddenly turned into

skad [1K]

Einstein's famous equation, E = mc^2 relates the mass (m) of an object to energy (E). The speed of light (c), is the constant of proportionality. Einstein formulated the equation within his theory of special relativity. Indeed, a physical interpretation of this equation is that any given mass is equivalent to the energy given by the equation, if it were suddenly converted to energy. Therefore the answer to the question is true.

5 0

4 years ago

Each orbit surrounding an atom is allowed _____. only 2 electrons only 8 electrons an unlimited number of electrons a limited nu

PIT_PIT [208]

Each orbit surrounding an atom is allowed A LIMITED NUMBER OF ELECTRONS.

The number of orbit that an atom has is determined by its atomic number, the higher the atomic number the higher the number of orbit in the atom and each orbit has different energy level. Each orbit can only take fixed number of electron. The first shell can only take two electrons while the subsequent shells can only take eight electrons. When an orbit has taken the highest number of electron possible, the remaining electrons are moved to the next shell.

5 0

3 years ago