1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sedaia [141]
3 years ago
5

How many valence electrons does a sulfate (S04-2) ion contain? 30 32 24

Chemistry
1 answer:
Firlakuza [10]3 years ago
4 0

Answer:

30

Explanation:

A valance electron is an electron in the outer shell. Both Sulfur and Oxygen have 6 valance electrons. Because there is 1 sulfur atom and 4 oxygen atoms in SO4, that means it is 5x6, giving 30 valance electrons.

You might be interested in
Write 2 different scenarios of how livestock animals provide a service. (Example – Zoe the
Anon25 [30]

Answer:

Interacting with animals has been shown to decrease levels of cortisol (a stress-related hormone) and lower blood pressure. Other studies have found that animals can reduce loneliness, increase feelings of social support, and boost your mood.

Explanation:

6 0
3 years ago
A student placed 2 drops of an unknown sample in a test tube and added 2 mL of ethanol to the test tube while mixing gently. The
Tatiana [17]

Answer:

2-propanol

Explanation:

From the given information

2 drops of an unknown sample were said to be placed in a test tube followed by the addition of 2 ml of ethanol then gentle mixing. They then initiate a further addition of  2 drops of potassium permanganate reagent (KMNO₄) to the test tube and mixed the contents of the test tube thoroughly. After adding 2 drops of potassium permanganate reagent, the reagent oxidizes the secondary alcohols(2-propanol) to ketone(i.e acetone) and no further reaction will take place since there are no reactive C-H bonds left. The diagram attached below shows how the reaction proceeds.

3 0
3 years ago
Which body changes occur during adolescence?
dmitriy555 [2]

Answer:

Explanation:

the head and the homones

7 0
3 years ago
Help me please byubflyfheqwucheuqcbidlvbyeqvygieuqvuleqvhyiroev
Reptile [31]

Answer:

The answer you have selected is correct

Explanation:

4 0
3 years ago
Calculate the mass of hydrogen formed when 27 g of aluminum reacts with excess hydrochloric acid according to the balanced equat
Alex

6.069 grams is the  mass of hydrogen formed when 27 g of aluminum reacts with excess hydrochloric acid.

Explanation:

Balanced equation for the reaction:

2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

data given:

mass of aluminum = 27 grams

atomic mass of one mole of aluminum = 26.89 grams/mole

formula to calculate number of moles:

number of moles = \frac{mass}{atomic mass of one mole}

number of moles = \frac{27}{26.89}

                              = 1.004 moles of aluminum will react

from the balanced equation:

2 moles of Al reacted to form 3 moles of H2

1.004 moles of Al will produce x moles of H2

\frac{3}{2} = \frac{x}{1.004}

x = 3.012 moles of H2 will be formed.

mass will be calculated as number of moles multiplied by atomic weight

mass of 3.012 moles of hydrogen ?(atomic weight of one mole H2 = 2.015 grams)

= 3.012 x 2.015

= 6.069 grams of H2 will be formed.

6 0
3 years ago
Other questions:
  • When OH- and H+ ions are brought together, they quickly combine to form water molecules.
    9·2 answers
  • A gas in a rigid container at 25C has a pressure of .96atm. A change in temperature causes the pressure to increase to 1.25 atm.
    8·1 answer
  • A balloon contains 0.15 moles of co2 gas. how many molecules of co2 are in the balloon?
    7·2 answers
  • A chemical reaction takes place in which energy is released. Arrange the reaction’s characteristics in order from start to finis
    12·1 answer
  • The process in which organisms grow and replace worn-out cells is called: A. Cell regeneration B. Cell division C. Mitosis D. Bo
    14·1 answer
  • What metric units does a graduated cylinder use??
    5·1 answer
  • Study island help pleaseeee
    8·2 answers
  • What is the volume of 902.0 g of C₂H₄ gas at STP
    15·1 answer
  • What is the pH of a solution with a hydrogen concentration of 4.3 X 10^-12
    5·1 answer
  • Name the 3 elements, in order, that make up a very important part of Thanksgiving. (Spell out a word with chemical symbols)
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!