Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What does the rate of a reaction measure?

1. AHow quickly reactants are used up or products are formed
2. BHow much energy the final products contain
3. CHow much product forms in total by the end
4. DHow hot the reaction gets

Jakie wiązanie utrzymuje razem chlorek sodu (sól kuchenną)?

1. AWiązanie metaliczne
2. BWiązanie wodorowe
3. CWiązanie jonowe
4. DWiązanie kowalencyjne

Which element makes up the largest share of the human body by mass?

1. ANitrogen
2. BHydrogen
3. CCarbon
4. DOxygen

Sulfur has 16 electrons. In which period of the periodic table is it?

1. APeriod 2
2. BPeriod 6
3. CPeriod 16
4. DPeriod 3

What percentage of the mass of water (H₂O, 18 g/mol) is hydrogen (H = 1 g/mol)?

1. AAbout 11%
2. BAbout 5,6%
3. CAbout 67%
4. DAbout 89%

Why does keeping food in a refrigerator slow down spoilage?

1. ALower temperatures raise the activation energy of every reaction
2. BCold air contains no oxygen
3. CCold temperatures add preservatives to the food
4. DLower temperatures slow down chemical and microbial reactions

Which 1-litre solution lowers the freezing point of water the most?

1. A1 M glucose
2. B1 M NaCl
3. C1 M CaCl₂
4. D0,5 M NaCl

A patient's temperature is 104 °F. What is it in degrees Celsius?

1. A43 °C
2. B72 °C
3. C58 °C
4. D40 °C