Recent questions

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A white solid L changes to yellow solid R when strongly heated but on cooling becomes white again. When L is reacted with dilute nitric(v) acid effervescence occurs.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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The standard reduction potentials of two half cells are

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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Nitrogen reacts with oxygen according to the equation.

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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An aqueous solution of hydrogen chloride can be prepared as shown in the diagram below.

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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The following elements belong to the same group of periodic table.

asked Jul 7, 2021 in Chemistry Form 2 by anony mous

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Describe how you would prepare dry sample of lead (II) chloride starting with lead (II) carbonate.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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The table below gives some experimental results on four samples of water. Use the information to answer the questions that follow.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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The lattice energy of sodium bromide and hydration energies of sodium and bromide ions are 733,406 and 335kj/mol respectively.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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2 answers

Define molar heat solution.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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70g of salt W were added to 80cm3 of water at 25°C. After stirring 10g of crystals of salt were filtered out. Determine the solubility of salt W at 25°C.

asked Jul 7, 2021 in Chemistry Form 2 by anony mous

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An element has isotopic species A and B each with a mass number 39 and 40 respectively. The percentage of A is 60% and B is 40% for an isotopic element X. Calculate the relative atomics mass of X.

asked Jul 7, 2021 in Chemistry Form 2 by anony mous

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The atomic number of element A is 11 and that of B is 8

asked Jul 7, 2021 in Chemistry Form 2 by anony mous

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State the process that takes place when;

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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Zitaje changamoto zozote tano za miviga katika jamii yoyote ile.

asked Jul 6, 2021 in Fasihi by anony mous

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Ni mambo gani ambayo huchangia kubadilika kwa kazi za fasihi simulizi?

asked Jul 6, 2021 in Fasihi by anony mous

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Kwa kutumia vipengele vitano, onyesha maingiliano yaliyopo baina ya fasihi simulizi na fasihi andishi.

asked Jul 6, 2021 in Fasihi by anony mous

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Mwalimu Mstaafu- (Dumu Kayanda) “Hiari na mukhitari ni juu yako. Lakini yeye kafika nyumbani”. Eleza mambo makuu ambayo mwandishi anayaibua kabla na baada ya kutolewa kwa usemi huu.

asked Jul 6, 2021 in Tumbo Lisiloshiba na Hadithi Nyingine by anony mous

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Mame Bakari- (Mohammed Khelef Ghassary) “Haikuwa stahiki yake kubebeshwa mzigo kama ule.”

asked Jul 6, 2021 in Tumbo Lisiloshiba na Hadithi Nyingine by anony mous

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Onyesha uhusiano uliopo baina ya wahusika hawa na maudhui ya hadithi.

asked Jul 6, 2021 in Kigogo by anony mous

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1 answer

“Sitaki kazi za uchafu hapa Sagamoyo."

asked Jul 6, 2021 in Kigogo by anony mous

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