<u>Answer:</u> The density of HCl solution is 1.18 g/mL
<u>Explanation:</u>
We are given:
Mass of beaker = 5.333 g
Mass of HCl + beaker = 11.229 g
Mass of HCl = [11.229 - 5.333] g = 5.896 g
To calculate the density of substance, we use the equation:
Mass of HCl = 5.896 g
Volume of HCl = 5.00 mL
Putting values in above equation, we get:
Hence, the density of HCl solution is 1.18 g/mL
Answer:
1.53x10^22 atoms of Au
Explanation:
To find the atoms of gold we need first, to convert the mass of gold to moles using molar mass of gold (196.97g/mol). Then, these moles must be converted to number of atoms based on definition of moles (1 mole = 6.022x10²³ atoms).
<em>Moles Au:</em>
5.00g Au * (1mol / 196.97g) = 0.0254 moles of Au
<em>Atoms of Au:</em>
0.0254 moles * (6.022x10²³ atoms / 1 mole) =
<h3>1.53x10^22 atoms of Au</h3>
Answer:
Dalton's atomic theory consisted of several postulates.
Explanation:
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All matter consists of indivisible particles called atoms.
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Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements.
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Atoms cannot be created or destroyed.
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Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compound atoms.
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Atoms of same element can combine in more than one ratio to form two or more compounds.
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Atoms are the smallest unit of matter that can take part in a chemical reaction.
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Answer:
9256.5 g/ml
Explanation:
Use the formula,
Density = mass/volume
;Where you need to calculate the volume change firstly,
Volume = 238.0 - 207.4
;Volume = 30.6 ml
; Hence for calculating density,
; Density = 302.5 × 30.6
; Density = 9256.5 g/ml