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
Sholpan [36]
3 years ago
14

Basic substances have a gritty texture.

Chemistry
1 answer:
crimeas [40]3 years ago
5 0
<h3>1.<u> Answer;</u></h3>

False

<h3><u>Explanation;</u></h3>

Bases have some of the following properties;

  • They have a bitter taste
  • They have a slimy, or soapy feel on fingers
  • Most bases react with acids and precipitate salts.
  • Strong bases may react violently with acids.
  • Bases turn red litmus paper blue

<h3>2. <u>Answer;</u></h3>

An acid

<h3><u>Explanation;</u></h3>
  • When acids are dissolved in water, the concentration of the acid decreases and it becomes dilute.
  • It dissociates in water to give H+ ions or hydrogen ions.
  • All acidic solutions contain more hydrogen ions than hydroxide ions, therefore when added to water it increases the concentration of H+ ions in water, as water is a neutral substance whose concentration of H+ ions is equal to OH-.
You might be interested in
A certain first-order reaction has a rate constant of 2.15×10−2 s−1 at 20 ∘C. What is the value of k at 55 ∘C if Ea = 72.0 kJ/mo
adell [148]

Answer:

k_2=0.504s^{-1}

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the rate constant at 55 °C by using the temperature-variable version of the Arrhenius equation:

ln(\frac{k_2}{k_1} )=-\frac{Ea}{R}(\frac{1}{T_2} -\frac{1}{T_1} )

Thus, we plug in the temperatures, activation energy and universal constant of gases in consistent units to obtain:

ln(\frac{k_2}{0.0215s^{-1}} )=-\frac{72000\frac{J}{mol}}{8.3145\frac{J}{mol*K}}(\frac{1}{55+273} -\frac{1}{20+273} ) \\\\ln(\frac{k_2}{0.0215s^{-1}} )=3.154\\\\k_2=0.0215s^{-1}exp(3.154)\\\\k_2=0.504s^{-1}

Regards!

3 0
3 years ago
Aside from silica gel and alumina what other stationary phase can you use in chromatography​
Svetlanka [38]

Answer:

Paper

Explanation:

In chromatographic separation, two different phases are important; a stationary phase and a mobile phase.

The stationary phase is the phase that does not move. Substances are separated based on how fast or slowly they move in the stationary phase.

The mobile phase is usually the solvent(or mixture of solvents) that carries the solutes through the stationary phase.

The stationary phase is usually composed of a porous material. Paper is a porous material. The mobile phase is trapped between the cellulose fibers of the paper and separation is achieved.

7 0
2 years ago
PLEASE HELP, WILL GIVE BRAINLIEST!
Over [174]
Hi,
The purpose of the burning splint is to provide activation energy.
5 0
3 years ago
CHEMISTRY MCQ HELP NEEDED, THANKS!
leonid [27]
D odours
Thats the answer please mark me as brainiest

7 0
3 years ago
Read 2 more answers
How would you explain why liquids solidify when they are cooled???
Ostrovityanka [42]
When liquids are subjected to lower temperatures, the kinetic energy of the molecules would decrease accordingly making them closer to each other and leading to a decrease in volume until the substance is solidified. Hope this answers the question.
5 0
3 years ago
Other questions:
  • Please can u help me .
    9·2 answers
  • Someone please help me
    8·1 answer
  • Which statement is true according to the kinetic theory? Will mark brainliest
    8·1 answer
  • An unknown element is a solid at room temperature, is highly conductive, and is easily hammered into thin sheets. it is most lik
    12·1 answer
  • True of False : animals eat other animals to get energy and building blocks to help them grow and repair.​
    10·2 answers
  • Balance the following chemical equation by providing the correct coefficients. CO+H2 ———- H2O+CH4
    9·1 answer
  • In an Ionic Bond the Metal Gives electrons to the Non-Metals
    15·1 answer
  • HELP ME PELASE I JUST NEED THIS LAST QUESTION!
    15·1 answer
  • ‼️Picture Shown‼️Extra points‼️ You will loose your points if your answer is removed :) ‼️So trolls don’t waste your time on thi
    11·1 answer
  • How does the weather affect a dead body's temperature?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!