CHEMISTRY HIGH SCHOOL

Based on the electron configuration,how many valence electrons are in
technetium, Tc?
1s²2s²2p63s²3p64s23d¹04p65s24d5
A2
C. 4
B. 5
D. 9

Answers

Answer 1
Answer:

Answer:

2

Explanation:

The outermost shell is 5s and it has two electrons.

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What is a Benedict solution?

As water is added to a 0.10 M NaCl aqueous solution, the conductivity of the resulting solution

Answers

There are two types of conductance

a) molar conductance

b) specific conductance

specific conductance is also known as conductivity

Molar conductance [the conductance offered by one mole of electrolyte dissolved in any volume of solution] increases with increase in dilution. The reason for weak and strong electrolytes are different.

i) for weak electrolytes the molar conductance increases due to increase in degree of dissociation

ii) for strong electrolytes the molar conductance increases due to decrease in inter ionic interactions

Conductivity (specific conductance) is the conductance offered by one unit volume of an electrolytic solution

The conductivity decreases with increase in dilution due to less number of ions per unit volume of solution.

so here the conductivity of resulting solution will decrease if water is added to a 0.10 M NaCl  solution
The more water added the lower the conductivity. The Na+ and Cl- ions allow the solution to be conductive. The lower the concentration, the less conductive the solution will get until it is not conductive at all. 

How many moles of H2 are needed to react with 1 mole off N2?

Answers

3 H₂ + N₂ = 2 NH₃

3 moles H₂ ------- 1 mole N₂
? moles H₂ -------- 1 mole N₂

H₂ = 1 * 3 / 1

H₂ = 3 / 1

= 3 moles of H₂

hope this helps!

Help with chemistry, Ill give brainliest to whoever can helpThe mass number of an isotope of uranium is 238, and its atomic number is 92. Which symbol best represents this isotope of uranium?

(ignore the answer i chose, i just guessed)

Answers

I think your guess is correct

25. In the formula for a molecular compound, which atom generally comes first? You may wentto refer to a periodic table.

Answers

Answer:

For organic compounds, carbon and hydrogen are listed as the first elements in the molecular formula, and they are followed by the remaining elements in alphabetical order. For example, for butane, the molecular formula is C 4 H 10.

Explanation:

Atoms are to molecules as: a) Chimneys are to roofs. b) Windows are to doors. c) Keys are to locks. d) Bricks are to walls.

Answers

Atoms are to molecules as bricks are to walls.

Adding hydrogen atoms to an unsaturated fatty acid will make it __________.a. more solid
b. have better 6 benefits in relationship to heart disease
c. increase its flavor
d. create a fatty acid

Answers

The answer is (a.) more solid

 

Adding hydrogen atoms to an unsaturated fatty acid will make it more solid. This process is called hydrogenation. In this process, hydrogen is added to an unsaturated fatty acid to make it more saturated and thereby more solid at a room temperature.
Adding hydrogen atoms to an unsaturated fatty acid will make it more solid.
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