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3 years ago

What properties you can determine for carbon and calcium based on their respective locations on the periodic table

Chemistry

1 answer:

Gennadij [26K]3 years ago

3 0

Answer:

Carbon is non metal because it is found in the right side of the periodic table while calcium is metal because it is found in the left side of the periodic table.

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An element has two naturally occurring isotopes with atomic masses of 112.90 amu and 114.90 amu. The relative abundances of thes

Musya8 [376]

Answer:

C. 114.8 u

Explanation:

The atomic mass of X is the weighted average of the atomic masses of its isotopes.

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent of the total).

Set up a table for easy calculation

0.0429 × 112.90 u = 4.843 u

0.9571 × 114.90 u = 109.97 u

TOTAL = 114.8 u

7 0

3 years ago

Write balanced molecular, ionic, and net ionic equations for the reaction occurs when (a) a BaCl2 (Barium Chloride) is mixed wit

lubasha [3.4K]

A.) We write the molecular equation for the chemical reaction as:

BaCl2(aq)+Na2SO4(aq)→BaSO4(s)⏐+2NaCl(aq)

Alternatively, we could write the net ionic equation:

Ba2+ + SO2^−4→ BaSO4(s)⏐

B.)We write the molecular equation for the chemical reaction as:

Ba(OH)^2 + 2HBr → BaBr2 + 2H2O

The ionic equation can be written as;

Ba^2+ + 2OH^- + 2H^+ + 2Br^- →

Ba^2+ + 2Br^- + 2H2O

the net ionic equation can be written as;

2OH^- + 2H^+ → 2H2O

Alternatively, we could write the net ionic equation

OH^-(aq) + H^+(aq) → H2O(l) net ionic equation.

C.) We write the molecular equation for the chemical reaction as:

2 HNO2(aq) + Ba(OH)2(aq) 

→ Ba(NO2)2(aq) + 2 H2O(l)

Net ionic equation

HNO2(aq) + OH-(aq) → NO2-(aq) + H2O(l)

Alternatively, we could write the net ionic equation as:

2H^+ + 2OH → 2H2O

8 0

4 years ago

What does the constant bombardment of gas molecules against the inside walls of a container produce?

Bas_tet [7]

Pressure since pressure is defined as force per unit area and the molecules exert a force on the walls of the container when they bombard it

3 0

3 years ago

in the laboratory, a group of students was assigned to determine the density of an unknown liquid. They used a buret to find a v

Daniel [21]

They should report the density as 1.11 g/L .

Density = mass/volume = 2.260g/2.04 mL

My calculator says the density 1.107 843 137 g/mL

However, the answer can have no more significant figures than are in the number with the fewest significant figures.

The volume measurement has only three significant figures, so we must round off the density to three significant figures.

We drop all the digits after the zero.

The digit to be dropped is 7, so we round up the last significant figure of the answer.

1.107 843 137 → 1.11

4 0

4 years ago

When 7.00 g of hydrogen react with 70.0 g of nitrogen, hydrogen is considered the limiting reactant because:

noname [10]

7.5 mol of hydrogen would be needed to consume the available nitrogen.

Explanation:

When hydrogen reacts with nitrogen, ammonia is formed as shown below;

3H₂ (g) + N₂ (g) → 2NH₃ (g)

As seen from the equation, every 3 moles of H₂ react with a mole of N₂ to form 2 moles of NH₃.

The limiting factor in a chemical reaction is the reactant that gets depleted first.

Because the molar mass of nitrogen gas is approximately 28g/mol, 70g of nitrogen gas would be 2.5 moles.

The reaction ratio of nitrogen to hydrogen in the reaction is 1 : 3. The reaction would require 2.5 * 3 (7.5) moles of hydrogen for a complete reaction.

However since there are only 7g on hydrogen, (Remember 1 mole of H₂ is approximately 2g), the available moles of H₂ is 7 / 2 = 3.5

3.5 moles fall short of the 7.5 moles of H₂ required for a complete reaction. H₂ gets depleted first before N₂. The reaction would require 4 more moles of H₂.

6 0

4 years ago

What properties you can determine for carbon and calcium based on their respective locations on the periodic table​

What properties you can determine for carbon and calcium based on their respective locations on the periodic table