Yalnızca sınav çalışması içindir. Bunu asla gerçek hastalar veya gerçek ilaç dozları için kullanmayın. Kullanım koşulları
1. Kolay
What does the rule "like dissolves like" mean?
A Every substance dissolves in water B Solids dissolve only in other solids C Polar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones D Only substances with identical formulas can ever dissolve in each other 2. Kolay
Bir asit ve bir baz birbirini nötrleştirdiğinde ne oluşur?
A Yalnızca karbondioksit B Daha güçlü bir asit C Bir tuz ve su D Bir metal ve hidrojen gazı 3. Kolay
Bir atomda hangi parçacığın yükü pozitiftir?
A Proton B Foton C Nötron D Elektron 4. Orta
A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?
A 40 g B 20 g C 0 g D 10 g 5. Orta
Which type of radiation can be stopped by a sheet of paper?
A X-rays B Gamma rays C Beta particles (fast electrons) D Alpha particles 6. Orta
A patient's arterial blood pH is 7,25. How is this described?
A Acidosis B Normal C Neutral D Alkalosis 7. Zor
A compound has the empirical formula CH₂ and a molar mass of 42 g/mol (C = 12, H = 1). What is its molecular formula?
A C₃H₆ B CH₂ C C₄H₈ D C₂H₄ 8. Zor
At the top of a high mountain, air still contains about 21% oxygen. Why do climbers still get less oxygen with each breath?
A Oxygen is heavier, so it all sinks to sea level B Cold air contains no oxygen C The total air pressure is lower, so the partial pressure of oxygen is lower D The percentage of oxygen in the air falls sharply as you climb higher
Cevap anahtarı 1. C · Polar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones2. C · Bir tuz ve su3. A · Proton4. B · 20 g5. D · Alpha particles6. A · Acidosis7. A · C₃H₆8. C · The total air pressure is lower, so the partial pressure of oxygen is lowerTam adım adım çözümler: bu konuyu examproblems.com’da çalışın.