All categories

2 years ago

In a given column of the periodic table the elements have _____.

Chemistry

1 answer:

kakasveta [241]2 years ago

6 0

Answer:

a. similar properties

Explanation:

In a given column of the periodic table, the elements have similar properties.

A column on the periodic table is known as a group or family. The group is a vertical arrangement of elements on the periodic table.

Elements in the same group have the same number of valence electrons after their group number.

For example, all the elements in group 1 have one valence electron. Those in group 2 have 2 valence electrons.

The valence electrons of an atom determines its chemical properties. So, all elements in the same group have the same chemical properties.

You might be interested in

If the mass of an object is 20 kg and the acceleration is 5m/s2 . What is the force?

igomit [66]

Answer:

100 newtons

Explanation:

Using the force equation to solve;

F = m * a

F = 20 * 5

F = 100

5 0

2 years ago

For the following reaction, 22.8 grams of diphosphorus pentoxide are allowed to react with 13.5 grams of water . diphosphorus pe

gavmur [86]

Answer:

$m_{H_3PO_4}=31.5gH_3PO_4$

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$P_2O_5(s)+3H_2O(l)\rightarrow 2H_3PO_4(aq)$

Thus, since the diphosphorus pentoxide to water molar ratio is 1:3 and we are given the mass of both of them, for the calculation of the maximum mass phosphoric acid that is yielded, one could first identify the limiting reactant, for which we compute the available moles of diphosphorus pentoxide (molar mass 142 g/mol):

$n_{P_2O_5}=22.8gP_2O_5*\frac{1molP_2O_5}{142gP_2O_5}=0.161molP_2O_5$

And the moles of diphosphorus pentoxide that are consumed by 13.5 g of water (molar mass 18 g/mol):

$n_{P_2O_5}^{consumed}=13.5gH_2O*\frac{1molH_2O}{18gH_2O}*\frac{1molP_2O_5}{3molH_2O} =0.25molP_2O_5$

Hence, since less moles of diphosphorus pentoxide are available, we sum up it is the limiting reactant, therefore, the maximum mass of phosphoric acid (molar mass 98 g/mol) is computed by considering the 1:2 molar ratio between them as follows:

$m_{H_3PO_4}=0.161molP_2O_5*\frac{2molH_3PO_4}{1molP_2O_5} *\frac{98gH_3PO_4}{1molH_3PO_4} \\\\m_{H_3PO_4}=31.5gH_3PO_4$

Regards.

8 0

2 years ago

What does the chemical formula cacl2 show about the compound it represents?

Anna [14]

A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.

7 0

2 years ago

Read 2 more answers

Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are

mote1985 [20]

Answer:

Unfavorable reactions: Reaction A and Reaction B.

Coupled reactions favorable: Reactions B and C and Reactions A and C.

Net change:

Reactions B and C : -14.2kJ/mol

Reactions A and B : 30.1kJ/mol

Reactions A and C: -16.7kJ/mol

Explanation:

A reaction is thermodynamically favorable (spontaneous) if ΔG < 0. Thus, the unfavorable reactions -ΔG > 0- are:

Reaction A and reaction B.

When reaction C is coupled with reaction B and reaction A the chemical equation is:

ATP + fructose-1,6-phosphate ⟶ ADP + fructose-1,6-bisphosphate

ΔG = 16.3 - 30.5 = -14.2 kJ/mol

ATP + glucose ⟶ ADP + glucose-6-phosphate

ΔG = 13.8 - 30.5 = -16.7 kJ/mol

The coupled reaction of A and B has a change in free energy of:

ΔG = 13.8 + 16.3 = 30.1 kJ/mol

4 0

3 years ago

At elevations higher than sea level the atmospheric pressure is ___ than the atmospheric pressure at sea level

lions [1.4K]

Answer:

lower

Explanation:

The higher the sea level, the lower the atmospheric pressure. This is due to the density of air decreasing as the altitude increases.

5 0

2 years ago