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
Natalka [10]
3 years ago
6

Your instructor will first, pour ~ 2ml of dilute HCl(aq)solution into a small test tubeand willthen add a few drops of phenolpht

halein indicator to the same test tube. At the end,she/he willadd ~ 3ml of dilute NaOH(aq)solution to the test tube. Write down your observation
Chemistry
1 answer:
Talja [164]3 years ago
7 0

Answer:

I dont know

Explanation:

coz I don't know the answer

You might be interested in
Plz help I have to finish test in 1 hour!!!!
AnnZ [28]

Answer:

I think its the first one. unless there is more to the question

6 0
3 years ago
An electrochemical cell is powered by the half reactions shown below.
andrezito [222]
Reduction reactions are those reactions that reduce the oxidation number of a substance. Hence, the product side of the reaction must contain excess electrons. The opposite is true for oxidation reactions. When you want to determine the potential difference expressed in volts between the cathode and anode, the equation would be: E,reduction - E,oxidation. 

To cancel out the electrons, the e- in the reactions must be in opposite sides. To do this, you reverse the equation with the negative E0, then replacing it with the opposite sign. 

Pb(s) --> Pb2+ +2e-      E0 = +0.13 V
Ag+ + e-  ---> Ag           E0 = +0.80 V

Adding up the E0's would yield an overall electric cell potential of +0.93 V.
7 0
4 years ago
Calculate the mass of 0.00456 moles of (NH4)2SO4
Anna [14]
To find the mass you need to find the weight of a mol of the molecules by adding up the atomic mass.

N =  14.007 g/mol
H = 1.008 g/mol
S = 32.065 g/mol
O = 16 g/mol

2(14.007) + 8(1.008) + 32.065 + 4(16) = 132.143 g/mol

Now you know how much an entire mol weight you multiply it by how much you actually have 

0.00456 * 132.143 = 0.603 g
7 0
3 years ago
Sometimes described as a "chemical brother" of gaba (gamma-aminobutyric acid), which amino acid neurotransmitter acts in an exci
poizon [28]

excitatory amino acids are the amino acids helps in transformation of neurotransmitters or it helps in transmission of synapsis rapidly in brain of mammal. EAA known to be neurotransmitters for Central nervous system.

Excitatory amino acids count may vary from 50’s to 100’s. They are mostly composed of non-protein- amino acids obtained from algae or fungi.

The possible EAAs are Glutamate (Glu) and Aspartate which act as excitatory neurotransmitters in the brain. They get released from neurons where they induce excitation via metabotropic Glu receptors.  

Both glutamate and aspartate having excitatory effect on neurotransmission whereas Gama-amino butyric acid having inhibitory effect on neurotransmission.

Thus, the statement ‘neurotransmitters are chemical brother of gaba’ is indicating the complementary effect of each other.


4 0
3 years ago
Turbines are 100 percent efficient. True False
max2010maxim [7]
False because there’s only 60% turbulence 20% heat 20% sound
6 0
3 years ago
Read 2 more answers
Other questions:
  • Specific heat is the heat capacity of an object divided by its mass in grams.
    15·2 answers
  • If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the radioactive material has deca
    10·1 answer
  • A cubic object has a volume of 250 cm. What is its density if its mass is 5 points<br> 257.3 g?
    7·1 answer
  • Which type of cell is E. coli?
    10·2 answers
  • If the condition change such that there are 4 mil at 4 atm and at 270 K, what is the new volume?
    14·1 answer
  • Consider the following system at equilibrium: 2A(aq)+2B(aq)⇌5C(aq) Classify each of the following actions by whether it causes a
    8·1 answer
  • A solution of NaCl(aq)NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq)Pb(NO3)2(aq) , until no further precip
    15·1 answer
  • Which activity is an example of chemical change?
    14·1 answer
  • What happened to solid materials when mixed with the liquid materials?​
    15·2 answers
  • At which point does condensation occur in this water cycle diagram?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!