Answer:
C. 1-ethyl, 3-methylcyclohexane
(Photo for proof at the bottom.)
Explanation:
The 1-ethyl is because you start numbering from the longest branch, towards the next closest branch. Prefix "eth-" means two, there are 2 carbons in the longest branch. 3-methyl is because the next branch is at number 3, and prefix "meth-" means 1, there is 1 carbon in that chain. "Cyclo" in cyclohexane means the skeletal model is shaped like a ring, and the "hexane" means there are 6 carbons in the ring. Prefix "hex" means 6.
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A heterogenous mixture is one which does not have uniform properties throughout. This is likely to happen in a mixture of sand and water because sand does not dissolve in matter and will settle down.
Answer:
0.705 g/cm³
Explanation:
Step 1: define density
The (volumetric mass) density of a sample or substance, is this sample or substance its mass per unit volume and can be defined through following formula:
ρ = m/v
with ρ = density (kg/m³)
m = mass of the substance (kg )
v = volume (m3)
Step 2: change datat SI-units
10.0 cm³ = 10^-5 m³
7.05 g = 0.00705 kg
ρ = 0.00705 kg / 10^-5 m³ = 705 kg / m³
To convert this to g/cm³ we have to divide by 1000
ρ = 0.705 g/cm³
To control this we calculate 7.05g / 10cm³ = 0.705 g/cm³
The desnity of the alcohol is 0.705 g/cm³
Answer:
54 g
Explanation:
We'll begin by calculating the density of X. This can be obtained as follow:
Mass of X = 54 g
Length (L) = 9 cm
Breadth (B) = 2 cm
Height (H) = 1 cm
Volume of X = L × B × H
Volume of X = 9 × 2 × 1
Volume of X = 18 cm³
Density of X =?
Density = mass /volume
Density of X = 54/18
Density of X = 3 g/cm³
Finally, we shall determine the mass of Y as follow:
Length (L) = 3 cm
Breadth (B) = 3 cm
Height (H) = 2 cm
Volume of Y = L × B × H
Volume of Y = 3 × 3 × 2
Volume of Y = 18 cm³
Density of Y = Density of X (since they are made of the same material)
Density of X = 3 g/cm³
Density of Y = Density of X = 3 g/cm³
Mass of Y =.?
Density = mass /volume
3 = mass of Y /18
Cross multiply
Mass of Y = 3 × 18
Mass of Y = 54 g
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