The answer is:
C.Their densities are lower than the density of water.
The Explanation:
According to the table below of the density of alkynes you will see that it is lower than the density of water. densities of alkenes , alkynes and aromatic hydrocarbons are lower than the water.
and the alkenes are insoluble in water because it has a non polar characteristics and it is also lighter than water because its density is lower than water.
Where are the choices? without the choices, i think the volcano could increase the earth's temperature
Answer:In astronomy, geography, and related sciences and contexts, a direction or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. [1] Conversely, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction. In general, something that is vertical can be drawn from up to down (or down to up), such as the y-axis in the Cartesian coordinate system.
Contents
1 Historical definition
2 Geophysical definition
2.1 The plumb line and spirit level
2.2 The flat earth approximation
2.3 The spherical Earth
2.4 Further complications
2.5 Walls and floors
2.6 Independence of horizontal and vertical motions
3 Mathematical definition
3.1 In two dimensions
3.2 In three dimensions
3.3 In the classroom
4 Discussion
4.1 Practical use in daily life
5 See also
6 References and notes
7 Further reading
8 External links
Historical definition
Girard Desargues defined the vertical to be perpendicular to the horizon in his 1636 book Perspective.
The word horizontal is derived from horizon,[2] whereas vertical originates in the late Latin verticalis, which is from the same root as vertex, meaning "highest point".[3]
Geophysical definition
Further information: Gravity of Earth and Figure of Ea
Explanation:
I believe the answer is C !
Answer:
4.55x10⁻⁴ atm
Explanation:
When the balance is used, it first must be tared, it means that the weight of the vessel will be discounted, so the mass of the gas produced must be above 0.5 mg to be read in the balance.
The molar mass of the CO2 is 44 g/mol, so, for a mass of 0.5 mg = 0.0005 g, the number of moles is:
n = 0.0005/44
n = 0.000011 mol
The ideal gas law is:
PV = nRT
Where P is the pressure, V is the volume, R is the constant of the gases (0.082 atm.L/mol.K), and T is the temperature (30°C = 303 K), so:
P*0.6 = 0.000011*0.082*303
P = 4.55x10⁻⁴ atm