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
meriva
2 years ago
11

Which of the following elements ia an alkali metal?

Chemistry
2 answers:
Delicious77 [7]2 years ago
8 0

That would be potassium. The alkali  metals are in Group 1 of the Periodic Table.  Some others in that Group are Lithium, Sodium, and  Rubidium

Anna11 [10]2 years ago
7 0

A) Potassium

Potassium contains the six chemical elements that make it an alkali metal?

You might be interested in
Which of the following statements describes
kozerog [31]

Answer:

Energy is released as heat during the reaction.

5 0
2 years ago
You have 100 mL of a solution of benzoic acid in water; the amount of benzoic acid in the solution is estimated to be about 0.30
dimaraw [331]

Answer:

0.00370 g

Explanation:

From the given information:

To determine the amount of acid remaining using the formula:\dfrac{(final \ mass \ of \ solute)_{water}}{(initial \ mass \ of \ solute )_{water}} = (\dfrac{v_2}{v_1+v_2\times k_d})^n

where;

v_1 = volume of organic solvent = 20-mL

n = numbers of extractions = 4

v_2 = actual volume of water = 100-mL

k_d = distribution coefficient = 10

∴

\dfrac{(final \ mass \ of \ solute)_{water}}{0.30  \ g} = (\dfrac{100 \ ml}{100 \ ml +20 \ ml \times 10})^4

\dfrac{(final \ mass \ of \ solute)_{water}}{0.30  \ g} = (\dfrac{100 \ ml}{100 \ ml +200 \ ml})^4

\dfrac{(final \ mass \ of \ solute)_{water}}{0.30  \ g} = (\dfrac{1}{3})^4

\dfrac{(final \ mass \ of \ solute)_{water}}{0.30  \ g} = 0.012345

Thus, the final amount of acid left in the water = 0.012345 * 0.30

= 0.00370 g

3 0
3 years ago
At equilibrium at 2500K, [HCl]=0.0625M and [H2]=[Cl2]=0.00450M for the reaction H2+Cl2 ⇌ HCl.
ASHA 777 [7]

Answer:

a. H_2+Cl_2 \rightleftharpoons 2HCl

b. K = 192.9

c. Products are favored.

Explanation:

Hello!

a. In this case, according to the unbalanced chemical reaction we need to balance HCl as shown below:

H_2+Cl_2 \rightleftharpoons 2HCl

In order to reach 2 hydrogen and chlorine atoms at both sides.

b. Here, given the concentrations at equilibrium and the following equilibrium expression, we have:

K=\frac{[HCl]^2}{[H_2][Cl_2]}

Therefore, we plug in the data to obtain:

K=\frac{(0.0625)^2}{(0.00450)(0.00450)}\\\\K=192.9

c. Finally, we infer that since K>>1 the forward reaction towards products is favored.

Best regards!

8 0
2 years ago
Do the number of protons in an atom of an element always equals its atomic weight.
Elenna [48]
No. The number of a protons is not equal to it's atomic weight, instead it is equal to the 'atomic number'
5 0
3 years ago
The difference between the initial (first) position and the final position of an object
Anna [14]
It is called DISPLACEMENT of the object....
3 0
3 years ago
Other questions:
  • What part of an atom is detected by stm?
    8·1 answer
  • What is the broad name for movement of materials across a membrane
    7·1 answer
  • What is the answer to SiO2 + C --> Si + CO
    9·1 answer
  • For your research project, your group is planning to treat embryos with acetaminophen at a concentration of 50 ug/L plus varying
    10·1 answer
  • 2. The temperature of a gas is increased from 125⁰C to 182⁰C inside of a rigid container. The original pressure of the gas was 1
    10·2 answers
  • Why do many people have different habits
    5·1 answer
  • An unknown acid has a hydronium ion concentration of 0.00352. what is its ph
    13·1 answer
  • 1. The pH of a solution made by combining 150.0 mL of 0.10 M KOH with 50.0 mL of 0.20 M HBr is closest to which of the following
    8·1 answer
  • What happen when molten zinc bromide is electrolysised
    14·1 answer
  • In the chemical formula below, how many H atoms are present?<br> SNH4OH
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!