Hiba

This page lists questions and answers that were posted by visitors named Hiba.

Questions

The following questions were asked by visitors named Hiba.

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?

NaOH+HNO3---> NaNO3+H2O calculate the number of moles of every ion present in solution after the reaction has occurred.

In which reaction does the oxidation number of oxygen increase? a. Ba(NO3)2+K2SO4--->BASO4+2KNO3 b. HCL+ NaOH---> NaCl+H20 c. Mg0+ H20---> Mg(OH)2 d. 2SO2+02---> 2SO3 e. 2H2O---> 2H2+O2

what is the horizontal asymptote for y=(x-2)/(x^2-9)?

Least to greatest Plz help me ....o.o101-0.100-0.110-0.0011 Plz help me to find a least to greTesT.

when designing a protocol to produce auxotrophs for biochemical pathways, how long should you irradiate yeast in this system to maximize the number of auxotrophic mutants? Explain your reasoning.

a steel cylinder of oxygen with a volume of 15 L was available for medical purposes. The cylinder pressure decrease from 40.6 to 38.5 atm during which time the temperature remain at 24.0 °C how many moles of oxygen had been removed

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 it drop in the next 2 seconds?

The sum of two numbers is 80 and if subtracted the results is 5 What are thet two numbers

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 conductivity device for the complex prepared at the concentration of 1.10-3 M. Calculate the number of ions of the complex? 3- Y...

1_ Al in 1.200 g impure [NH4Al (SO4) 2] (237 g / mol) is precipitated with NH3 as Al2O3 × H2O. The precipitate is filtered Al2O3 (102 g / mol) 0.178 g% What is the amount of Al (27 g / mol)? 2_ 100 ml 0.25 M NH3, 50ml 0.2 M HCl (Ka=1.75×10^-5) pH= ? 3_ 0....

3_ If the ammonia solution is added to the tin salt solution (2), what is the compound precipitated in white color? 4_ Which of the fifth group cations are present in the group reagents? 5_ If the hydrogen sulfide solution is added to the mercury salt sol...

1 Calcium solution 2 Barium solution 3 Strontium solution In which solution or solutions does not precipitate form when potassium ferro cyanide solution is added to the above solutions buffered with ammonia and ammonium chloride?

I need help choosing the right answers, please🙏🏻 1_ Which of the following is a secondary amine? a) Dipropylamine b) benzylamine c) aminocyclohexane d) n_propylamine e) ethylamine What Grignard compound should be taken when manufacturing 2,2_Dimethylpro...

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) solution? (Ka = 6.28×10^-5 for C6H5COOH) 2)_How many grams of NHCl (53.491 g/mol) should be added to 200 mL of 0.180M NH3 solution in o...

Which of the following is equal to the solubility of Ba(IO3)2, a poorly soluble salt, in water? Ksp=1.57×10^-9 a) 1.98×10^-9M b) 2.80×10^-5M c) 7.32×10^-4M d) 1.98×10^-5M e) 7.32×10-3M

1)_ 500ml solution is prepared by dissolving 2560mg Ca3(PO4)2 in enough water. Calculate the value of pCa accordingly?

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 1.00M mandelic acid solution?

3)_ Calculate the pH's before and after adding 0.5mmol HCl to 100ml 0.02 Lactic acid + 0.08M Sodium Lactate mixture?

1) A sample of 0.5843 g of vegetable food was analyzed using the Kjeldahl method to find the nitrogen content. The liberated ammonia is collected in 50.00 mL of 0.1062M hydrochloric acid. The excess acid is titrated using 11.89 mL of 0.0925M NaOH. Calcula...

Choose the correct one: 1) 25.00 mL is taken from a solution containing NaOH, NaHCO3 and Na2CO3 individually or as a mixture. up to the phenolphthalein milestone when analyzed When 11.00 mL of 0.100 M HCl is taken and a second 25.00 mL is taken and titrat...

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?

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 ×10^-13 for AgBr)

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 is adjusted to pH 10 and titrated with 0.0150M 21.15ml EDTA. What is the percentage of bismuth in the sample?

Answers

The following answers were posted by visitors named Hiba.

So will it be 0.004*6=2(mL) 0.024/2=mL 0.012mL ?

YES 15g NaOH dissolves in 150 mL of 0.250 M nitric acid.

Sorry i got confused so it is 4000 mL. So will the final volume be the L that is added?

So the answer is 6 .please let me know if I m right or wrong.

These 2 answers are different which one is the right.

Thank you both of you.

I think the answer is 16 .....2(4+4) 16 . am I right .help ..

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.

180 - 132 = 48 132 + 48 = 180 180 - 48 = 132 48 + 132 = 180

Can u plz explain me in easy way.i don't understand the calculation

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

thank you very much🙏🏻☺️