How many grams of N2 gas are present in 1.13 L of gas at 2.09 atm and 291 K?

Answer:

Mass of Fe = 32.55 g

Explanation:

The molar mass of a single Fe atom is 55.845 g/mol

This means that

1 mole of Fe equals = 55.845 g ..............(1)

According to the mole concept,[ [TAG_24]]

1 mole of Fe contains = atom..........(2)

55.845 g of Fe contains = atoms

Reversing the equation yields

atoms of Fe correspond to 55.845 g

1 atom of Fe corresponds to g

one atom corresponds to

On computation,

one atom corresponds to 32.55 g of Fe

Mass of Fe = 32.55 g

Answer:

Calcium's atomic radius is roughly 175 pm.

Explanation:

We know that magnesium has an atomic radius of 150 pm.

The atomic radius of strontium measures 200 pm.

Since calcium's position is between magnesium and strontium in group 2 of the periodic table, its atomic radius should be roughly averaged between magnesium's and strontium's atomic radii because atomic radius is not constant.

Thus;

Calcium's atomic radius is approximately calculated as follows;

The average atomic radius is (200 + 150)/2 = 175 pm.

Response:

9.606 g

Clarification:

Step 1: Write the balanced combustion equation

C₂H₆O(l) + 3 O₂(g) → 2 CO₂(g) + 3 H₂O(g)

Step 2: Determine the moles for 11.27 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

11.27 g × (1 mol/18.02 g) = 0.6254 mol

Step 3: Find the moles of C₂H₆O that produced 0.6254 moles of H₂O

The ratio of C₂H₆O to H₂O is 1:3. Thus, the moles of C₂H₆O are 1/3 × 0.6254 mol = 0.2085 mol

Step 4: Calculate the mass for 0.2085 moles of C₂H₆O

The molar mass of C₂H₆O is 46.07 g/mol.

0.2085 mol × 46.07 g/mol = 9.606 g

Response: sodium + water → sodium hydroxide + hydrogen

Clarification:

1) The initial part of the statement "sodium combines with water" indicates that these pure substances serve as the reactants.

Sodium belongs to the alkali metals (group 1: Li, Na, K, Rb, Cs, Fr).

A common characteristic of alkali metals is their reactive behavior with water, resulting in the formation of the respective hydroxide and hydrogen gas.

2) The following words, "to produce" suggest that what comes next represents the products of the reaction. In chemical equations, this is indicated by the arrow →

3) Finally, it specifies the products of the reaction: sodium hydroxide and hydrogen gas.

4) The word equation observes the sequence reactants → products, translates here as sodium + water → sodium hydroxide + hydrogen

5) Using chemical symbols and formats, this can be represented as:

Na(s) + H₂O (l) → NaOH(aq) + H₂(g).