Answer:
John Dalton, an English chemist and meteorologist, is credited with the first modern atomic theory based on his experiments with atmospheric gases.
Answer:
D
Explanation:
all of them are primary socialization groups
Answer:I think c or b but mostly b
Explanation:
Object A at 40
degrees C and object B at 80 degrees C are placed in contact with each other.
The heat flow will flow from the Object B to the object A because of temperature
difference. To attain equilibrium, the heat flow must flow form a higher
temperature to a lower temperature.
Answer:
The urine may turn purple or remain colourless
Explanation:
Adding sodium hydroxide (NaOH) and hydrated copper(II) sulfate to urine in a test tube is a test for proteins in urine.
This test depends on the ability of sodium hydroxide (NaOH) and hydrated copper(II) sulfate to form purple-coloured cordination complexes with peptides. The appearance of this purple colour is a positive test for protiens in urine.
Hence, when a few drops of a mixture of sodium hydroxide and copper(ii) tetraoxosulphate (vi) solution added to a sample of urine test in a test tube, the solution may turn purple indicating the presence of proteins in urine or remain colourless indicating the absence of proteins in urine.