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Bonia

Questions and answers by visitors named Bonia

Questions (80)

During an experiment 1.5g of magnesium reacts with excess dilute hydrochloric acid to produce hydrogen gas at STP. Calculate the
1. 5 answers
2. 210 views
Different types of learning strategies and how they can be employed to meet the diverse needs of learners
1. 2 answers
2. 109 views
Determine the final volume of the solution if 0.783 grams of Na2CO3 is used to make a 0 348 M solutionShow all calculations
1. 2 answers
2. 122 views
The molar mass of hydrated sodium carbonate is found to be 268g the formula of the hydrated sodium carbonate is Na2CO3.xH2OCalcu
1. 7 answers
2. 327 views
Discuss the four cardinal positions of the Earth and explain how each brings changes in seasons by making reference to the
1. 2 answers
2. 103 views
Discuss with examples stages of development according to Piaget
1. 2 answers
2. 98 views
Construct a mindnd map that explains information processing theory
1. 2 answers
2. 82 views
Discuss the characteristics of classical instrumental and operant conditioning theories.
1. 2 answers
2. 86 views
Exaplin the diagram US>CS>RCD>R in terms of classical conditioning
1. 2 answers
2. 64 views
Tragedy if macbeth
1. 2 answers
2. 100 views
Why do we study Shakespeare
1. 2 answers
2. 119 views
10 recourse of help in the community
1. 2 answers
2. 88 views
Types of eclipse
1. 2 answers
2. 142 views
Names of spheres and their definitionsTheir influence on one another
1. 2 answers
2. 143 views
Different spheres and their influence on one another
1. 2 answers
2. 102 views
Different spheres of the Earth and their influence on one another
1. 2 answers
2. 100 views
Discuss seasons of the Earth
1. 2 answers
2. 77 views
Discuss physical factors affecting mining in South African context
1. 2 answers
2. 140 views
Analyse the internal structure of the Earth by looking at the thickness,diameter,density and volume and density of lithosphere,
1. 2 answers
2. 134 views
Whqt is The smallest unit into which a pure substance such as sugar or water can be divided while still retaining its
1. 2 answers
2. 129 views
Identify ions present in KHCO3
1. 2 answers
2. 160 views
A nitride ion has how many electrons
1. 2 answers
2. 101 views
Which atom is most likely to form a 3+ ion
1. 2 answers
2. 123 views
Which atom is most likely to form a 3+ ion?A. Li B.Kr C.P D.Sr E.Fe
1. 2 answers
2. 97 views
What is the correct formula for an ionic compound that contains aluminum ions and carbonate ions
1. 2 answers
2. 113 views
What is the corrects bame for NH4CIOA
1. 2 answers
2. 100 views
Two colorless liquids, potassium iodine and lead(II) are mixed to form a yellow precipitate. What name of the precipitate can be
1. 2 answers
2. 99 views
Symbol of lead nitrate
1. 2 answers
2. 96 views
Which of the following represents a neutralization reactionA. Sodium hydroxide + hydrochloric acid> sodium chloride+ water B.
1. 2 answers
2. 183 views
Determine the grams of solute required to prepare 507 ml of a 2.75M NaF solution
1. 2 answers
2. 143 views
2.00L of 0.800M NaNO3 must be prepared froma solution known to be 1.50 in concentration. How many ml are required
1. 2 answers
2. 89 views
Use the solubility guidelines below to determine whether a precipitation reaction will occur in the following cases. If so write
1. 4 answers
2. 106 views
Define sublimation
1. 2 answers
2. 102 views
When you take a block of butter out of the fridge,it is hard. However after 15 minutes at room temperature it is soft enough to
1. 2 answers
2. 129 views
Define isotope
1. 3 answers
2. 81 views
Name the type of chemical bond formed between a hydrogen and nitrogen atom
1. 2 answers
2. 100 views
How many valence electrons does a nitrogen atom have
1. 2 answers
2. 81 views
Write down Lewis structure for the ammonia molecule
1. 2 answers
2. 118 views
For the ammonia molecule write down the number of election pairs surrounding the central atom, number of atoms surrounding
1. 2 answers
2. 125 views
Name th retype of bond formed between an ammonia molecule and a hydrogen ion
1. 2 answers
2. 86 views
Represent th eformation of an ammonium ion with the aid of Lewis structures
1. 2 answers
2. 83 views
For the ammonium ion write down the number of atoms surrounding the central atom and name used to describe the molecular shape
1. 7 answers
2. 134 views
Which one of the following bonds will be the strongest1. Bond between a nitrogen atom and a hydrogen atom 2. Bind between a
1. 2 answers
2. 126 views
Name the following covalent bonds1m SiF4 2. N2S3 3. HBr 4. Br2 4. NO
1. 4 answers
2. 143 views
Number of chlorine atoms present in the MgCL2 produced which is 5.90
1. 4 answers
2. 111 views
What are moles
1. 2 answers
2. 74 views
What are moles in chemistry
1. 7 answers
2. 93 views
Arrheniues theoryLowry-Brönsted theory
1. 2 answers
2. 175 views
Write down the formula of the ion responsible for the basic properties of sodium hydroxide
1. 2 answers
2. 113 views
Use Lowry-Brönstes theory to write the balanced equation for the following reaction: HNO3(aq) +OH(aq)><_+_
1. 2 answers
2. 193 views
Setting of the jane eyre novel and the moods Jane was feeling
1. 2 answers
2. 124 views
Choose the correct answerAn algae colony 1.is a close association of different algae 2.is various filaments that occur together
1. 2 answers
2. 181 views
A prokaryote that gains organic nutrients from other living organisms is a1.chemoautotroph 2.photoautotroph 3.chemo heterotroph
1. 2 answers
2. 231 views
Mycorrhizae1. Are plant parasites 2. Is a mutualistic relationship 3. Is a type of lichen 4. Supply phosphates
1. 2 answers
2. 155 views
Zoospores are1. Haploid,flagellated spores 2. Thick-walled spores 3. Gamete 4. Diplodocus zygotes
1. 2 answers
2. 94 views
Prokaryotes reproduce by means of1. The lysogenic cycle 2. Fragmentation 3. The lytic cycle 4. Binary fusion
1. 2 answers
2. 102 views
Spores are produces during asexul and sexual reproduction in1. Yeasts 2. Bacteria 3. Fungi 4. Algae
1. 2 answers
2. 172 views
Lichens1. Are Air pollution sensors 2.destruct soil 3. Are classified on the basis of colour 4. Are an association between
1. 2 answers
2. 99 views
Lichens are what1. Air pollution sensors 2. Destruct soil 3. Are classified on the basis of colour 4. Are an association between
1. 2 answers
2. 105 views
HIV is what1. An emerging virus 2. A bacteriophage 3. A prion 4. A prophage
1. 2 answers
2. 126 views
Organisms in the domain bacteria and domain archea are all what1. Parasitic 2. Prokaryotic 3. Mutualistic 3. Pathogens
1. 2 answers
2. 132 views
Bacteria from domain arachea differ from bacteria from domain monera based on what1. Cell walls contain peptidoglycan 2. Plasma
1. 2 answers
2. 122 views
Give one word for each of the following descriptions1.A plant hormone(gas) and causes abscission and ripening of fruits 2.
1. 2 answers
2. 106 views
Give one weight for each of the following description.1.a plant hormone(gas) and causes abscission and ripening of fruits
1. 2 answers
2. 125 views
Give one word for each of the following descriptions1.plant hormone(gas) and causes abscission and ripening of fruits 2.positive
1. 2 answers
2. 137 views
Match the following words with the descriptions1. Red tide 2. Saccharomyces cerevisiae used in baking and brewing industries
1. 2 answers
2. 187 views
Compare Zygomycota, Ascomycota and Bisidiomycota by referring to their reproduction strategies and other 2 key features
1. 2 answers
2. 131 views
Evaluate the statement " A shift to sporophyte dominance is an adaptation of plants to life on land" by referring to mosses,
1. 2 answers
2. 177 views
Give a short overview of transportation of substances in plants
1. 2 answers
2. 158 views
Discuss the two possible mechanism (Xylem sap being pushed upwards from the roots or pulled downwards by leaves)by referring to
1. 2 answers
2. 162 views
Use 5 steps of the 5E Model to explain how to apply each in tje scenario
1. 2 answers
2. 149 views
Plan an investigation that learners should conduct in the form of worksheet. Yhe worksheet should include the following:Apparatu
1. 2 answers
2. 96 views
The inclination of the Earth exists is at what1. 22 1°/2 2. 23 1°/2 3. 180° 4. 390° Which among the following solar waves'
1. 2 answers
2. 146 views
Equinox occurs when1.21-22 June 2. 21-22 December 3. 22-23 April 4. 21-22 March and 22-23 September Which among the following
1. 2 answers
2. 75 views
How long does it take for the moon to orbit around the Earth1. 24 days 2. 365 1/4 days 3. 27.3 days 4. 24 hours Which feature
1. 2 answers
2. 158 views
When molten magma flows from the core of the Earth to the crust and cools it forms what1. Organic rocks 2. Sedimentary rocks 3.
1. 2 answers
2. 145 views
Differentiate between greenhouse gas and global warmingDifferentiate between adhesion and perihelion Give five reasons why the
1. 2 answers
2. 143 views
Outline two benefits of tides to the inhabitants of the coastal regions in South AfricaHow does solar insolation reaches the
1. 2 answers
2. 129 views
Analyse the different compositions and structure of the atmosphere by referring to the altitude, composition of the gas and
1. 2 answers
2. 88 views
Describe how the interaction between the geosphere and the atmosphere forms part of the Earth complex systemList any four
1. 2 answers
2. 92 views

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