Užduočių lapas tema Chemija slaugos stojamiesiems egzaminams su atsakymais

What range does the common pH scale cover?

1. A0 to 100
2. B0 to 14
3. C1 to 10
4. D−7 to +7

What are the usual units of molar mass?

1. Amol/L
2. Bg/mol
3. Cmol/g
4. Dg/L

What kind of carbon–carbon bonds do alkanes contain?

1. AIonic bonds
2. BAt least one double bond
3. CAt least one triple bond
4. DOnly single bonds

Which is larger, a sodium atom (Na) or a sodium ion (Na⁺)?

1. AThe sodium atom
2. BThe sodium ion
3. CThey are the same size
4. DIt depends on the temperature

How many moles of gas are in 44,8 L at STP (0 °C and 1 atm)?

1. A44,8 mol
2. B2 mol
3. C22,4 mol
4. D0,5 mol

Reakcijoje 2H₂ + O₂ → 2H₂O, kiek molių vandens susidaro iš 3 molių deguonies?

1. A2 mol
2. B3 mol
3. C1,5 mol
4. D6 mol

A gas occupies 4 L at 2 atm and 200 K. What is its volume at 1 atm and 400 K?

1. A4 L
2. B16 L
3. C8 L
4. D1 L

A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?

1. A60%
2. B48%
3. C125%
4. D80%