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
zepelin [54]
2 years ago
7

In what ways is the reaction between calcium and water different than the reactions between sodium and water, and potassium and

water?
Chemistry
1 answer:
adoni [48]2 years ago
5 0

Answer:

esta con's para 15, tu the diamatera' la 24 equlia 5<4 ponte 50

Explanation:

You might be interested in
Consider 100.0-g samples of two different compounds consisting only of carbon and oxygen. one compound contains 27.2 g of carbon
Sliva [168]

This is a tricky question. All that matters are ratios of percentages, not percentages themselves. So no one should directly compare 27.2 with 42.9. We must and shall compare the ratios (27.2 to 72.8) and (42.9 to 57.1).

Take them both down to 1 to and see what happens.

Working out the formulas knowing atomic masses is a bit beside the point; this is how people first DISCOVERED the idea of atomic mass.

A

Carbon Oxygen

27.2g 72.8g (100-27.2)

Moles 27.2/12 72.8/16

2.27 4.55

Ratio 1 2

Do the same with the other

4 0
3 years ago
Read 2 more answers
What’s the number 9.1x10^3 in standard form
mafiozo [28]

Answer:

.0091

Explanation:

3 0
3 years ago
An element has an atmomic number of 68. The number of protons and electron in a neutral atom of the element are?
Bess [88]

Answer:

Explanation:

An element whose atomic number is 68 (number Z), has 68 electrons and 68 protons. According to the periodic table it corresponds to the element Erbium (Er), whose mass number (A) is 167. The number of neutrons is 167-68 = 99.

8 0
3 years ago
The atmospheric pressure at sea level is greater than on Mount Everest
statuscvo [17]
This statement is true in fact to mount Everest atmospheric pressure sit at about one third of that at sea level.

5 0
3 years ago
A certain organ pipe, open at both ends, produces a fundamental frequency of 272 HzHz in air. Part A If the pipe is filled with
vladimir2022 [97]

Answer:

fundamental frequency in helium = 729.8 Hz

Explanation:

Fundamental frequency of an ope tube/pipe = v/2L

where v is velocity of sound in air = 340 m/s; λ is wave length of wave = 2L ; L  is length of  the pipe

To find the length of the pipe,

frequency  = velocity of sound / 2L

272 = 340 / 2 L

L = 0.625 m

If the pipe is filled with helium at the same temperature, the velocity of sound will change as well as the frequency of note produced since velocity is directly proportional to frequency of sound.

Also, the velocity of sound is inversely proportional to  square root of molar mass of gas; v ∝ 1/√m

v₁/v₂ = √m₂/m₁

v₁ = velocity of sound in air, v₂ = velocity of sound in helium, m₁ = molar mass of air, m₂ = molar mass of helium

340 / v = √4 / 28.8

v₂ = 340 / 0. 3727

v₂  =  912.26  m /s  

fundamental frequency in helium  = v₂ / 2L

fundamental frequency in helium = 912.26 / (2 x 0.625)

fundamental frequency in helium = 729.8 Hz

7 0
2 years ago
Other questions:
  • Fossil fuels are considered useful to humans because they are
    14·2 answers
  • Give the chemical symbol for each of the following elements
    7·1 answer
  • an aqueous solution of NaOh is used as a drain cleaner.If the concentration of OH^- ions in this solution is 1×10^-5,the concent
    15·1 answer
  • A thermometer that was used in a calorimeter was consistently 2.7 °c too high. how would this affect the calculations of δh for
    10·1 answer
  • Potassium hydroxide (KOH) is a strong base
    5·1 answer
  • In an exothermic reaction the bonding energy of the product is:
    6·2 answers
  • V. = 22.4 L; P= 1 atm;<br> P, = ? atm; V, = 2.8 L
    14·1 answer
  • (GIVING BRAINLIEST) do what the following image says.
    9·2 answers
  • Pleaseeeeeeeeeeeeee please help
    10·1 answer
  • What is the formula for titanium (I) dichromate?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!