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Questions (28)

A 0.4510 g metal sample is dissolved in nitric acid and all metals are masked except bismuth (Bi^3+ = 209 g/mol). The solution
1. 1 answer
2. 250 views
What would be the pAg value if 30.00ml of 0.100M AgNO3 was added to a sample containing 30.00ml of 0.100M Br^-? (Ksp= 5.2
1. 1 answer
2. 288 views
1- Why is soap made from potassium salts of fatty acids soft?2- Why does adding a salt solution lead to a precipitation of soap?
1. 1 answer
2. 224 views
Choose the correct one:1) 25.00 mL is taken from a solution containing NaOH, NaHCO3 and Na2CO3 individually or as a mixture. up
1. 1 answer
2. 341 views
Choose the correct one:1) 25.00 mL is taken from a solution containing NaOH, NaHCO3 and Na2CO3 individually or as a mixture. up
1. 0 answers
2. 271 views
1) A sample of 0.5843 g of vegetable food was analyzed using the Kjeldahl method to find the nitrogen content. The liberated
1. 2 answers
2. 361 views
3)_ Calculate the pH's before and after adding 0.5mmol HCl to 100ml 0.02 Lactic acid + 0.08M Sodium Lactate mixture?
1. 1 answer
2. 253 views
2)_ To prepare a buffer solution with a pH of 3.45 What should be the mass of Sodium mandelate that should be added to 500ml of
1. 1 answer
2. 379 views
1)_ 500ml solution is prepared by dissolving 2560mg Ca3(PO4)2 in enough water. Calculate the value of pCa accordingly?
1. 1 answer
2. 213 views
Which of the following is equal to the solubility of Ba(IO3)2, a poorly soluble salt, in water? Ksp=1.57×10^-9a) 1.98×10^-9M
1. 1 answer
2. 253 views
1)_What is the pH of the medium when 10.00 mL of 0.1000M NaOH is added to 18.00 mL of a 0.1000M benzoic acid (C6H5COOH)
1. 2 answers
2. 280 views
I need help choosing the right answers, please🙏🏻1_ Which of the following is a secondary amine? a) Dipropylamine b)
1. 1 answer
2. 391 views
1 Calcium solution2 Barium solution 3 Strontium solution In which solution or solutions does not precipitate form when potassium
1. 1 answer
2. 388 views
3_ If the ammonia solution is added to the tin salt solution (2), what is the compound precipitated in white color?4_ Which of
1. 1 answer
2. 297 views
1_ Al in 1.200 g impure [NH4Al (SO4) 2] (237 g / mol) is precipitated with NH3 as Al2O3 × H2O. The precipitate is filtered
1. 2 answers
2. 504 views
1- Calculate the splitting energy of [Co (NO2) 6] -3 since 364 nm has a single band?2- 420 micro Siemens value is read in the
1. 2 answers
2. 492 views
1- A 40.0cm diameter loop is turned to the position where the largest flux is handled in a uniform electric field. In this
1. 0 answers
2. 473 views
A 40.0cm diameter loop is turned to the position where the largest flux is handled in a uniform electric field. In this
1. 1 answer
2. 387 views
The sum of two numbers is 80 and if subtracted the results is 5What are thet two numbers
1. 1 answer
2. 382 views
A pebble is dropped from rest from the top of a tall cliff and falls 4.9meters after 1 second has elapsed. How much further does
1. 1 answer
2. 2,162 views
a steel cylinder of oxygen with a volume of 15 L was available for medical purposes. The cylinder pressure decrease from 40.6 to
1. 0 answers
2. 511 views
a steel cylinder of oxygen with a volume of 15 L was available for medical purposes. The cylinder pressure decrease from 40.6 to
1. 1 answer
2. 459 views
when designing a protocol to produce auxotrophs for biochemical pathways, how long should you irradiate yeast in this system to
1. 1 answer
2. 391 views
Least to greatestPlz help me ....o.o101-0.100-0.110-0.0011 Plz help me to find a least to greTesT.
1. 6 answers
2. 398 views
what is the horizontal asymptote for y=(x-2)/(x^2-9)?
1. 0 answers
2. 274 views
In which reaction does the oxidation number of oxygen increase?a. Ba(NO3)2+K2SO4--->BASO4+2KNO3 b. HCL+ NaOH---> NaCl+H20 c.
1. 1 answer
2. 1,988 views
NaOH+HNO3---> NaNO3+H2Ocalculate the number of moles of every ion present in solution after the reaction has occurred.
1. 4 answers
2. 840 views
How many liters of water must be added to 4 liters of a 6 molar HNO3 solution to create a solution that is 2 molar?
1. 5 answers
2. 1,165 views

Answers (16)

thank you very much🙏🏻☺️
You wrote 3*159-2*51=159-102=57 So my question is that why are you putting 159 . This is even not in the question
Can u plz explain me in easy way.i don't understand the calculation
180 - 132 = 48 132 + 48 = 180 180 - 48 = 132 48 + 132 = 180
300
1.3
To maximize the number of auxotrophic mutant should not be more than 20 min, because if the cells exposed more than 20 min according to data I have, the number decrease start from 40 min and more.
85
I think the answer is 16 .....2(4+4) 16 . am I right .help ..
Thank you both of you.
These 2 answers are different which one is the right.
So the answer is 6 .please let me know if I m right or wrong.
Thank you.
Sorry i got confused so it is 4000 mL. So will the final volume be the L that is added?
YES 15g NaOH dissolves in 150 mL of 0.250 M nitric acid.
So will it be 0.004*6=2(mL) 0.024/2=mL 0.012mL ?

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