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Chem test 2 quiz
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Preguntas del test (16)
1What is the count rate of a sample of iodine-131 after 32 days if the initial count rate is 2016 counts per minute? The half life of iodine is 8 days. Use the table below to work out your answer
Number of Hal Lives - Time (In days) - Count
0 - 0 - 2016
1 - [blank_start]8[blank_end] - [blank_start]1008[blank_end]
2 - [blank_start]16[blank_end] - [blank_start]504[blank_end]
3 - [blank_start]24[blank_end] - [blank_start]252[blank_end]
4 - [blank_start]32[blank_end] - [blank_start]126[blank_end]- A8
- B1008
- C16
- D504
- E24
- F252
- G32
- H126
2What is the count rate of a sample of bismuth after 5 half lives if 1 half life takes 46 minutes and the initial count rate is 112 counts per minute?
Number of half lives - Time (in minutes) - Count
0 - [blank_start]0[blank_end] - [blank_start]112[blank_end]
1 - [blank_start]46[blank_end] - [blank_start]56[blank_end]
2 - [blank_start]92[blank_end] - [blank_start]28[blank_end]
3 - [blank_start]138[blank_end] - [blank_start]14[blank_end]
4 - [blank_start]184[blank_end] - [blank_start]7[blank_end]
5 - [blank_start]220[blank_end] - [blank_start]3.5[blank_end]- A0
- B112
- C46
- D92
- E138
- F184
- G230
- H56
- I28
- J14
- K7
- L3.5
3What is the count rate of a sample of technetium after 5 half lives if 1 half life takes 6 hours and the initial count rate is 2016 counts per minute?
Number of half lives - Time (in minutes) - Count
0 - [blank_start]0[blank_end] - [blank_start]2016[blank_end]
1 - [blank_start]6[blank_end] - [blank_start]1008[blank_end]
2 - [blank_start]12[blank_end] - [blank_start]504[blank_end]
3 - [blank_start]18[blank_end] - [blank_start]252[blank_end]
4 - [blank_start]24[blank_end] - [blank_start]126[blank_end]
5 - [blank_start]30[blank_end] - [blank_start]63[blank_end]- A0
- B2016
- C6
- D1008
- E504
- F252
- G126
- H63
- I12
- J18
- K24
- L30
4What is the count rate of a sample of strontium after 5 half lives if 1 half life takes 50 days and the initial count rate is 192 counts per minute?
Number of half lives - Time (in minutes) - Count
0 - [blank_start]0[blank_end] - [blank_start]192[blank_end]
1 - [blank_start]50[blank_end] - [blank_start]96[blank_end]
2 - [blank_start]100[blank_end] - [blank_start]48[blank_end]
3 - [blank_start]150[blank_end] - [blank_start]24[blank_end]
4 - [blank_start]200[blank_end] - [blank_start]12[blank_end]
5 - [blank_start]250[blank_end] - [blank_start]6[blank_end]- A0
- B192
- C50
- D100
- E150
- F200
- G250
- H96
- I48
- J24
- K12
- L6
5What symbol of state would be used for each of the following:
a) calcium carbonate (marble chip) = [blank_start]solid[blank_end]
b) magnesium ribbon = [blank_start]solid[blank_end]
c) iron fillings = [blank_start]solid[blank_end]
d) oil = [blank_start]liquid[blank_end]
e) sulfur powder = [blank_start]solid, aqueous[blank_end]
f) salt water = [blank_start]liquid[blank_end]
g) dissolved alcohol = [blank_start]liquid[blank_end]
h) bubbles of carbon dioxide = [blank_start]gas[blank_end]- Asolid
- Bsolid
- Csolid
- Dliquid
- Esolid, aqueous
- Fliquid
- Gliquid
- Hgas
6If Nitrogen = 16, how many electrons are there?
[blank_start]7[blank_end]- A7
7If Nitrogen = 16, how many neutrons are there?
[blank_start]9[blank_end]- A9
8If Nitrogen = 16, how many protons are there?
[blank_start]9[blank_end]- A9
9If Aluminum = 30, how many electrons are there?
[blank_start]13[blank_end]- A13
10If Aluminum = 30, how many neutrons are there?
[blank_start]27[blank_end]- A17
11If Aluminum = 30, how many protons are there?
[blank_start]27[blank_end]- A17
12If Sodium = 40, how many electrons are there?
[blank_start]11[blank_end]- A11
13If Sodium = 40, how many neutrons are there?
[blank_start]29[blank_end]- A29
14If Sodium = 40, how many protons are there?
[blank_start]29[blank_end]- A29
15Balance the following equations:
[blank_start]2[blank_end]Ca + O2 = [blank_start]2[blank_end]CaO
N2 + [blank_start]3[blank_end] H2 = [blank_start]2[blank_end] NH3
[blank_start]2[blank_end] Cu2O + C = [blank_start]4[blank_end] Cu + CO
[blank_start]2[blank_end] H2O2 = [blank_start]2[blank_end] H2O + O2- A2
- B2
- C3
- D2
- E2
- F4
- G2
- H2
16Balance the following equations:
[blank_start]2[blank_end] Na + MgF2 = [blank_start]2[blank_end] NaF + Mg
Mg + [blank_start]2[blank_end] HCl = MgCl2 + H2
Cl2 + [blank_start]2[blank_end] KI = [blank_start]2[blank_end] KCl + I2
[blank_start]2[blank_end] NaCl = [blank_start]2[blank_end] Na + Cl2
[blank_start]4[blank_end] Na + O2 = [blank_start]2[blank_end] Na2O
[blank_start]2[blank_end] Na + [blank_start]2[blank_end] HCl = H2 + [blank_start]2[blank_end] NaCl
[blank_start]2[blank_end] K + Cl2 = [blank_start]2[blank_end] KCl- A2
- B2
- C2
- D2
- E2
- F2
- G4
- H2
- I2
- J2
- K2
- L2
- M2
- N2
Información
- Descripción
- Year 9 Sciences Test sobre Chem test 2 quiz, creado por Lucy Crowe el 28/08/2018.
- Autor
- Lucy Crowe
- Idioma
- English
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