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
Neko [114]
3 years ago
14

PLEASE HURRRYYYY

Chemistry
1 answer:
stealth61 [152]3 years ago
3 0

Answer:

HCO₂H

Explanation:

A buffer is defined as the mixture between a weak acid and its conjugate base, or vice versa, in an aqueous solution.

The HCO₂Na (Sodium formate), is the conjugate base of formic acid, HCO₂H, a weak acid of pKa = 3.75.

Thus, to make a buffer using HCO₂Na, the other substance the buffer should contain is <em>HCO₂H</em>

You might be interested in
In what way are electrons quantized?
KiRa [710]

<u>Answer:</u> The correct option is A) They have fixed energy values.

<u>Explanation:</u>

Electron is one of the sub-atomic particle present around the nucleus of an atom which is negatively charged.

In an atomic model, it is assumed that the electron revolves around the nucleus in discrete orbits having fixed energy levels.

These electrons when jumping from one energy level to another, some amount of radiation is either emitted or absorbed.

These fixed energy levels are given by the Bohr model and thus, the electrons are quantized.

Hence, the correct option is A) They have fixed energy values.

6 0
3 years ago
Read 2 more answers
Find the mass of 1.112 moles HF?
Alexeev081 [22]

Answer:

22.25 g

Explanation:

To find the mass, you need to convert moles to grams and get 22.25 g.

7 0
3 years ago
For double-helix formation, DG can be measured to be 2 54 kJ mol 1 ( 2 13 kcal mol 1 ) at pH 7.0 in 1 M NaCl at 25 8C (298 K). T
levacccp [35]

Answer:

ΔS = -661.0J/mol is the entropy change for the system

ΔS = -842J/mol.K is the entropy change for the surroundings

Explanation:

From the relationship between ΔG, T, ΔH and ΔS,

Mathematically, ΔG = ΔH - TΔS

TΔS = ΔH - ΔS

ΔS = ΔH - ΔS / T

but ΔG = -54 kJ/mol, ΔH = -251 kJ/mol and T = 25 °C (298 K)

plugging into the equation,

ΔS = -251 kJ/mol - ( -54 kJ/mol) / 298

ΔS  = -0.6610KJ/mol or in J.mol

ΔS = -661.0J/mol is the entropy change for the system

  • For entropy change for the surroundings = ΔS = ΔH/T
  • ΔS  = -251 kJ/mol / 298K
  • ΔS = -0.84KJ/mol.K or -842J/mol.K is the entropy change for the surroundings
8 0
3 years ago
Please work out all the problems on this page, no links, no i don't knows please do not take advantage of me or my points please
likoan [24]

Answer:

first one-liquids dont have a fixed shape and solids do

6 0
3 years ago
Read 2 more answers
When cellular conditions allow for the synthesis of glycogen the overall δg for this anabolic pathway is positive.?
sertanlavr [38]
The sun and the wind
4 0
3 years ago
Other questions:
  • Which element is most likely to allow electricity to pass through it?
    6·2 answers
  • Please help me!!!! Thank you so much! I’m giving away 25 points for this one! I need both the problems solved
    15·1 answer
  • What is the mass number of beryllium with 5 neutrons
    7·1 answer
  • `which of the following is true ?
    5·2 answers
  • Evaporation is a process that requires energy to occur. Evaporation is ain)<br> reaction
    6·1 answer
  • How many grams of fluorine are contained in 8 molecules of boron trifluoride?
    14·2 answers
  • How would one go about solving this?? Thank you. ​
    12·1 answer
  • When is a scientific theory formed?
    15·1 answer
  • If four hydrogen atoms react with two hydrogen atoms, how many atoms<br> will be in the product?
    8·1 answer
  • Can you help me with these questions?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!