Trev
stix
Hey i cant do these questions, can u plz post the correct answers for me ppl <
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1.....Which of the following would be a reason that some metals like gold and silver were discovered early in human history?
A) they have low bond energies with other elements
B) they were more sought after by the wealthy
C) they were more malleable
D) they are less soluble
2..... H2SO4 + CaCO3 ---> wat r the products?
B) CaSO4 + CO2 + H2O
D) Ca2SO4 + CO2 + H2O
3..... Zn + HCL ---> ZnCl2 + H2
A) HCL acts like an alkali
B) Zn loses electrons in the process of ionising
D) Zn gains electrons in the process of ionising
4.....Moving left to right across the third period of the periodic table the
A) elements become better conductors of electricity
B) atomic radius increases
C) solubility in water increases gradually
D) first ionisation energy of the elements tend to increase
5.....Ores are of enormous benefit to society. Which of the following would be the best definition?
A) it is a type of rock
B) it is a substance found in the ground, usually containing aluminium or iron
C) it is a mineral with economic benefits
D) it is a nonmetal compound until it is extracted
6..... which if the following elements can have an isotope with 10 neutrons?
A) F
B) Br
C) Ca
D) Zn
7.....The number of atoms in 62g of P would be:
A) 6.02 (times) 10^23
B) 1.81 (times) 10^24
C) 2.17 (times) 10^25
D) 1.204 (times) 10^24
8..... Fe + 02 ---> Fe2O3
Calculate the mass of Fe2O3 formed when 3 moles of Fe react with excess amounts of O2
A) 239.55g
B) 275.85g
C) 159.70g
9..... The use of non-renewable resources today is a major long term concern. Which of the following lists contain only non-renewable resources?
A) bauxite, malachite, haematite
B) haematite, wood, bauxite
C) alcohol, wood, oil
D) bauxite, aluminium, sugar
10.... A factor that will not affect the price of raw metal would be:
A) the location and size of the ore body
B) the cost of transporting the ore
C) the manufacturing cost of the final products for sale to the market
D) the cost of mining and extraction of the ore
11....If a mole of chlorine gas (Cl2) has a mass of 70.91g, what will be the mass of 12 moles of chlorine atoms?
A) 850.9g
B) 5.91g
C) 425.5g
D) 1701.8g
)1.....Which of the following would be a reason that some metals like gold and silver were discovered early in human history?
A) they have low bond energies with other elements
B) they were more sought after by the wealthy
C) they were more malleable
D) they are less soluble
2..... H2SO4 + CaCO3 ---> wat r the products?
B) CaSO4 + CO2 + H2O
D) Ca2SO4 + CO2 + H2O
3..... Zn + HCL ---> ZnCl2 + H2
A) HCL acts like an alkali
B) Zn loses electrons in the process of ionising
D) Zn gains electrons in the process of ionising
4.....Moving left to right across the third period of the periodic table the
A) elements become better conductors of electricity
B) atomic radius increases
C) solubility in water increases gradually
D) first ionisation energy of the elements tend to increase
5.....Ores are of enormous benefit to society. Which of the following would be the best definition?
A) it is a type of rock
B) it is a substance found in the ground, usually containing aluminium or iron
C) it is a mineral with economic benefits
D) it is a nonmetal compound until it is extracted
6..... which if the following elements can have an isotope with 10 neutrons?
A) F
B) Br
C) Ca
D) Zn
7.....The number of atoms in 62g of P would be:
A) 6.02 (times) 10^23
B) 1.81 (times) 10^24
C) 2.17 (times) 10^25
D) 1.204 (times) 10^24
8..... Fe + 02 ---> Fe2O3
Calculate the mass of Fe2O3 formed when 3 moles of Fe react with excess amounts of O2
A) 239.55g
B) 275.85g
C) 159.70g
9..... The use of non-renewable resources today is a major long term concern. Which of the following lists contain only non-renewable resources?
A) bauxite, malachite, haematite
B) haematite, wood, bauxite
C) alcohol, wood, oil
D) bauxite, aluminium, sugar
10.... A factor that will not affect the price of raw metal would be:
A) the location and size of the ore body
B) the cost of transporting the ore
C) the manufacturing cost of the final products for sale to the market
D) the cost of mining and extraction of the ore
11....If a mole of chlorine gas (Cl2) has a mass of 70.91g, what will be the mass of 12 moles of chlorine atoms?
A) 850.9g
B) 5.91g
C) 425.5g
D) 1701.8g