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
swat32
3 years ago
13

Lovemyselftruly

Chemistry
1 answer:
NNADVOKAT [17]3 years ago
5 0
1.Wear a laboratory garment and wellbeing goggles to secure your face and body 
- Take mind while conveying hardware 
- Tie long hair back 
- Dependably leave a Bunsen burner on the security fire (yellow) when it is not being used 
- Don't wear counterfeit nails as they are profoundly combustible 
- Do the test on a reasonable work area with nothing on it 
- Never take a seat while doing an analysis in the event that something spills would you be able to can't escape the route in time and it goes on you, causing you hurt 
- Tidy up everything suitably when teh explore is finished 
- Be mindful so as not to touch or get as of late warmed protests as they might be hot 
- Don't defile substances 
2.Triangle with exclamation point means General Warning
Triangle with a flame means Highly Flammable
Triangle with a zig zag arrow pointing down means Hgh Voltage
 
You might be interested in
calculate the standard potential arising from the reaction in which NADH is oxidized to NAD and the corresponding biological sta
melisa1 [442]

Answer:

-219.99kJ

Explanation:

The acronym '' NADH'' simply stands for what is known as coenzyme 1 with full meaning of Nicotinamide Adenine Dinucleotide Hydride. This substance is useful in the production of energy. The oxidation reaction of NADH causes it to produce NADP⁺ and the oxygen produces water when it is in the reduction process. The balanced equation for the oxidation reaction is given below as:

NADPH ---------------------------------------------------------------------> NADP⁺H⁺ + 2e⁻.

Also, the balanced equation for the reduction reaction is given below as:

\frac{1}{2} O₂ + 2H⁺ + 2e⁻ --------------------------------------------------------------> H₂O.

It can be shown from the above REDOX reaction that the total number of electrons getting transferred is 2.

The  Gibbs energy = -nFE. where n = 2, F = faraday's constant = 96485.3329 C and E = overall cell potential.

The overall cell potential = E[ reduction reaction] - E[oxidation reaction] = 0.82 - (- 0.32 ) = 1.14 V.

Hence, the Gibbs energy = - 2 × 96485.3329 × 1.14 = -219.99kJ

7 0
2 years ago
Van dar waals are the dominant molecular force in the sodium chloride. ​
Vedmedyk [2.9K]

Answer:

Recall the two conceptual steps necessary to dissolve a solute and form a solution

Key Points

There are two conceptual steps to form a solution, each corresponding to one of the two opposing forces that dictate solubility.

The first conceptual step is dissolution, which corresponds to the force of the solvent-solvent and solute-solute intermolecular attractions that needs to be broken down.

The second conceptual step is solvation, which corresponds to the force of the solute-solvent intermolecular attraction that needs to be formed in order to form a solution.

Many intermolecular forces can contribute to solvation, including hydrogen bonding, dipole-dipole forces, Van Der Waals forces, and ion-dipole interactions.

Term

intermolecular forcesattractive and repulsive forces between molecules

The strength of the intermolecular forces between solutes and solvents determines the solubility of a given solute in a given solvent. In order to form a solution, the solute must be surrounded, or solvated, by the solvent. Solutes successfully dissolve into solvents when solute-solvent bonds are stronger than either solute-solute bonds or solvent-solvent bonds.

Qualitatively, one can determine the solubility of a solute in a solvent by using the rule “like dissolves like”. In general, solutes whose polarity matches that of the solvent will generally be soluble. For example, table salt (NaCl) dissolves easily into water (H2O) because both molecules are polar.

Intermolecular Forces and Their Importance in Solution Formation

There are two conceptual steps to form a solution, each corresponding to one of the two opposing forces that dictate solubility. If the solute is a solid or liquid, it must first be dispersed — that is, its molecular units must be pulled apart. This requires energy, and so this step always works against solution formation (always endothermic, or requires that energy be put into the system).

<em>#</em><em>p</em><em>a</em><em> </em><em>f</em><em>o</em><em>l</em><em>l</em><em>o</em><em>w</em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>h</em><em>e</em><em>a</em><em>r</em><em>t</em><em> </em><em>p</em><em>o</em><em> </em><em>p</em><em>a</em><em>r</em><em>a</em><em> </em><em>s</em><em>a</em><em> </em><em>i</em><em>b</em><em>a</em><em> </em><em>p</em><em>a</em><em>n</em><em>g</em><em> </em><em>answer</em><em> </em><em>a</em><em>t</em><em> </em><em>p</em><em>a</em><em> </em><em>b</em><em>r</em><em>a</em><em>i</em><em>n</em><em>l</em><em>e</em><em>s</em><em>t</em><em> </em><em>a</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em> </em><em>n</em><em>a</em><em> </em><em>d</em><em>e</em><em>n</em>

7 0
3 years ago
For Na2HPO4:(( (Note that for H3PO4, ka1= 6.9x10-3, ka2 = 6.4x10-8, ka3 = 4.8x10-13 ) a) The active anion is H2PO4- b) The activ
Komok [63]

Answer:

Check the explanation

Explanation:

Answer – Given, H_3PO_4 acid and there are three Ka values

K_{a1}=6.9x10^8, K_{a2} = 6.2X10^8, and K_{a3}=4.8X10^{13}

The transformation of H_2PO_4- (aq) to HPO_4^2-(aq)is the second dissociation, so we need to use the Ka2 = 6.2x10-8 in the Henderson-Hasselbalch equation.

Mass of KH2PO4 = 22.0 g , mass of Na2HPO4 = 32.0 g , volume = 1.00 L

First we need to calculate moles of each

Moles of KH2PO4 = 22.0 g / 136.08 g.mol-1

                             = 0.162 moles

Moles of Na2HPO4 = 32.0 g /141.96 g.mol-1

                             = 0.225 moles

[H2PO4-] = 0.162 moles / 1.00 L = 0.162 M

[HPO42-] = 0.225 moles / 1.00 L = 0.225 M

Now we need to calculate the pKa2

pKa2 = -log Ka

       = -log 6.2x10-8

       = 7.21

We know Henderson-Hasselbalch equation

pH = pKa + log [conjugate base] / [acid]

pH = 7.21 + log 0.225 / 0.162

     = 7.35

The pH of a buffer solution obtained by dissolving 22.0 g of KH2PO4 and 32.0 g of Na2HPO4 in water and then diluting to 1.00 L is 7.35

6 0
3 years ago
Plz help me
AlekseyPX
All of the above would be the answer


mark me brainliest
8 0
2 years ago
Read 2 more answers
I need help whats 1.09 g/mL to lbs/gal
storchak [24]
9.096491 lbs/gal hope it helps
3 0
3 years ago
Other questions:
  • In any pure sample of CO2, the ratio of the mass of carbon to the mass of
    10·1 answer
  • In looking at the bolded atoms in the answer choices, which pair consists of molecules having the same geometry? view available
    15·1 answer
  • Hydrogen bonding among water molecules gives water all of the following important properties, except: strong cohesion among the
    5·1 answer
  • For a reaction that follows the general rate law, Rate = k[A][B]2, what will happen to the rate of reaction if the concentration
    8·1 answer
  • Solid lithium iodide decomposes into solid lithium and iodine gas . Write a balanced chemical equation for this reaction.
    13·1 answer
  • How do sodium and potassium ions transfer in and out of an axon?
    8·1 answer
  • A golf ball has more mass than a tennis ball because it ____.
    14·1 answer
  • The part of an atom that is responsible for the bonding of atoms is —
    10·1 answer
  • Which grouping of circles, when considered in order from the top to the bottom, best represents the relative size of the atoms o
    6·1 answer
  • PLEASE HELPPPP ASAPPPPPP!!!!!!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!