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3 years ago

Which substance would be most suitable for row 3?

1 answer:

7 0

The substance that would be most suitable for row 3 is SODIUM CHLORIDE.
The periodic table is made up of groups and periods, the periods are also called rows. There are seven rows and 18 groups in the periodic table. The third period is made up of 8 elements; both sodium and chlorine are part of the eight elements, thus, sodium chloride is more likely to be found on the third row.

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What kind of thermochemical equation is represented below?

ryzh [129]

The kind of thermochemical equation represented below

that is
CaO(s) + H2O (l) = Ca(OH)2 (s) +65.2 kj

is exothermic ( answer B)
This is because its heat energy has a + sign meaning that heat is released by the reaction above.

6 0

3 years ago

What is the molarity of a solution made by adding 0.720 mole of NaOH to 2.40 liters of water

WITCHER [35]

Answer:

Molarity = 0.3 M

Explanation:

Given data:

Moles of NaOH = 0.720 mol

Volume of water = 2.40 L

Molarity = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Molarity = 0.720 mol / 2.40 L

Molarity = 0.3 mol/L

Molarity = 0.3 M

7 0

3 years ago

Which of the following is NOT a characteristic of a strong acid?

juin [17]

Answer:

a and c

Explanation:

4 0

3 years ago

What kind of molecule is glucose

Scrat [10]

Organic molecule. In particular, a carbohydrate.

6 0

3 years ago

se the following key to classify each of the elements below in its elemental form: A. Discrete atoms ... C. Metallic lattice B.

Lostsunrise [7]

Explanation:

the correct match can as follows:

1. helium ⇒ discrete atoms (helium is an inert gas)

2. oxygen ⇒ molecules (oxygen exists in molecular form as O2)

3 Magnesium ⇒ matalic lattice ( Magnesium is a metal FCC crystal Structure :) )

4 Aluminum⇒ covalent network (since it is situated in the middle of the group and posses amphoteric properties too)

4 0

3 years ago