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Worksheets4 zenfone
Total questions: 38
Worksheet time: 55mins
Which chemical equations is balanced?
Persamaan kimia manakah yang seimbang?
NaOH (aq) + H2SO4 (aq) → Na2SO4 (aq) +H2O (l)
Zn(NO3)2 (s) → ZnO (s) + 2NO2 (g) + O2(g)
Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)
CaCO3 (s) → CaO (s) + 2CO2 (g)
Equation above show the process of decomposition of hydrogen peroxide. Which of the following statement is correct?
Persamaan di atas mewakili proses penguraian hidrogen peroksida. Pernyataan yang manakah benar?
The product of the reaction is oxygen
Hasil tindak balas adalah oksigen
The reactant are water and oxygen
Bahan tindak balas adalah air dan oksigen
Three moles of hydrogen peroxide is decomposed into two moles of water and one mole of oxygen
Tiga mol hidrogen peroksida terurai kepada dua mol air dan satu mol oksigen
Hydrogen peroxide burn and produce water and oxygen
Hidrogen peroksida terbakar dan menghasilkan air dan oksigen
Boric acid is used to produce fibre glass textile. What is the chemical formula of boric acid?
Asid borik digunakan dalam penghasilan tekstil kaca gentian. Apakah formula kimia bagi asid borik?
H3B
H2SO4
H3B2
H3BO3
Which of the following is M?
Antara berikut, yang manakah M?
Copper(II) carbonate
Kuprum(II) karbonat
Copper
Kuprum
Copper(II) hydroxide
Kuprum(II) hidroksida
Copper(II) oxide
Kuprum(II) oksida
Insect repellent has the formula of CH3(CH2)5CHCHCHO. Determine the relative molecular mass of this substance.
[Relative atomic mass: H = 1; C = 12; O = 16]
Penyembur serangga mempunyai formula CH3(CH2)5CHCHCHO. Tentukan jisim molekul relatif bagi bahan ini.
[Jisim atom relatif: H = 1; C = 12; O = 16]
110
120
130
140
What is the molecular formula of compound with empirical formula C2H4O?
Apakah formula molekul sebatian dengan formula empirik C2H4O?
C3H7COOCH3
C3H7COOH
C4H9COOH
C2H5OH
Element X and element Y have proton number of 19 and 8 respectively. What is the relative molecular mass of a compound formed between X and Y?
[Relative atomic mass : X = 39 ; Y = 16]
Unsur X dan unsur Y masing-masing mempunyai nombor proton 19 dan 8. Berapakah jisim molekul relatif bagi sebatian yang terbentuk antara X dan Y?
[Jisim atom Relatif : X = 39 ; Y = 16]
94
35
46
71
When zinc carbonate powder is heated strongly, it produces colourless gas M. What is gas M?
Apabila serbuk zink karbonat dipanaskan dengan
kuat, gas tanpa warna M dihasilkan. Apakah gas M?
Hydrogen gas / Gas hidrogen
Carbon dioxide / Karbon dioksida
Inert gas / Gas adi
Oxygen gas / Gas oksigen
State the observation when gas M passed through the lime water.
Nyatakan pemerhatian apabila gas M dilalukan ke atas air kapur.
Lime water turn blue / Air kapur berubah warna ke biru
Lime water turns cloudy / Air kapur menjadi keruh
Nothing change / Tiada perubahan
Black precipitate form / Mendakan hitam terbentuk
Write the chemical equation for the reaction in the experiment above.
Tuliskan persamaan kimia bagi tindak balas yang berlaku dalam eksperimen di atas.
ZnO3 → ZnO + CO2
ZnCO2 → ZnO + CO2
ZnCO3 → ZnO + CO2
Zn → ZnO + CO2
6.02 x 1023 _____.
Isotopes of an element have a different number of...
Protons
Neutrons
Electrons
Mass
Potassium-39 has how many neutrons?
19
18
20
21
Nickel-59 has how many neutrons?
30
31
32
33
Bromine-80 has how many neutrons?
41
42
44
45
76 protons and 114 neutrons
Osmium-114
Osmium-76
Osmium-190
Osmium-190.23
12 protons and 13 neutrons
Mg-12
Mg-13
Mg-25
Mg-24.305
9 protons and 9 neutrons
Fluorine-18
Fluorine-9
Fluorine-16
Fluorine-18.998
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium?
85.468 amu
37 amu
85.6 amu
86.4 amu
There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope 65Cu composes 69.2% of the sample and 63Cu comprises the other 30.8%. Based on this data, what is the atomic mass of copper?
29 amu
63.546 amu
64.4 amu
63.6 amu
How do you calculate mass number?
Mass x percent
Protons + Electrons
Protons + Neutrons
Neutrons + Protons + Electrons
Name
Class Form 4 (Letters: AF, AG, AKH, AK, IK)
Fill in the blanks.
Isotopes are _ _ _ _ s of the same element with the same number of protons but different number of neutrons.
(a)
Who discovered neutrons?
Neils Bohr
J.J. Thompson
James Chadwick
Ernest Rutherford
Fill in the blanks.
Isotopes are atoms of the same _ _ _ m _ _ _ with the same number of protons but different number of neutrons.
(a)
Element W has 12 neutrons and 11 protons.
Which symbol represents atom W?
A
B
C
D
Fill in the blanks.
Isotopes are atoms of the same element with the _ _ _ e number of protons but different number of neutrons.
(a)
Based on this table.
Which atoms are isotopes?
Atom W
Atom X
Atom Y
Atom z
Fill in the blanks.
Isotopes are atoms of the same element with the same number of protons but _ _ _ _ _ _ e _ _ number of neutrons.
(a)
Fill in the blanks.
Natural Abundance is the _ _ _ _ e _ _ _ _ _ of isotopes present in a natural sample of element.
(a)
Relative Atomic Mass (RAM) can be calculated from the natural abundance of an element containing isotopes using the following formula (Refer Image)
Fill in the blanks.
Relative Atomic Mass is the percentage _ u _ of the Natural Abundance isotopes from an element.
(a)
Fill in the blanks.
Isotopes are atoms of the same element with the same number of _ _ _ _ _ _ s but different number of neutrons.
(a)
Magnesium exists naturally as three isotopes.
Based on image shown;
Calculate the relative atomic mass of magnesium
(To two decimal places)
(a)
A patient is diagnosed with a damage in the thyroid gland.
Which isotope is used to treat the patient?
Copper-64
Cobalt-60
Carbon-14
Iodine-131
Fill in the blanks.
Isotopes are atoms of the same element with the same number of protons but different number of _ _ _ _ _ _ _ s.
(a)
Uranium-235 and Uranium-238 are isotopes.
Which statement is correct?
Uranium-235 is a non-metal and Uranium-238 is a metal
Both have the same number of neutrons
Uranium-235 is denser than Uranium-238
Both have the same number of electrons
(Participation mark is taken / Markah penyertaan dikira)
(No penalty mark / Tiada markah penalti)
Chip in your truth-est Chemistry joke/meme.
Belanja se-satu jenaka/meme Kimia yang sebenar benarnya.
Or answer below / Atau jawab dibawah
Why does Iron Man has 2 genders?
Mengapa "Iron Man" ada 2 jantina?
Clue: Refer Periodic Table
Petunjuk: Rujuk Jadual Berkala Unsur
