d. 110 grams
Explanation:
The number of grams needed to make 1molar solution from 1liter volume is 110grams.
Concentration is the number of moles of solute dissolved in a given volume of solvent.
Since:
desired concentration = 1M
volume = 1L
Number of moles = ?
Concentration =
Number of moles = concentration x volume
Number of moles = 1 x 1 = 1mole
Mass of CaCl₂ = number of moles x molar mass
Molar mass CaCl₂ = 40 + (35x 2 ) = 110g/mol
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Mass of CaCl₂ = 1mole x 110g/mole = 110g
Answer:
Principal focus of a concave mirror. The principal focus of a concave mirror is a point on its principal axis to which all the light rays are parallel and close to the axis converge after reflection from the concave mirror.
Focal length of a concave mirror. The focal length of a concave mirror is the distance between its pole and the principal focus
The reflecting surface of a spherical mirror forms a part of a sphere. The centre of this sphere. This point is called the centre of curvature of the spherical mirror. Center of curvature can also be defined as the point in the centre of the sphere from which the mirror was sliced. It is represented by the letter C. Please note that the centre of curvature lies outside the mirror's reflecting surface. The centre of curvature of a concave mirror lies in front of it. However, it lies behind the mirror in case of a convex mirror.
If a concave mirror were thought of as being a slice of a sphere, then there would be a line passing through the center of the sphere and attaching to the mirror in the exact center of the mirror. This line is known as the principal axis.
Well to find instantaneous speed, you basically make the time frame really short, so basically measure the distance the object moves within a small amount of time(0.1 seconds or something). The smaller the time, the more accurate the instantaneous speed is.
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Answer:
P1 = 2680 pa P2 = 4870pa
T1 = 273k T2 = T
From the ideal gas equation,
P1 / T1 = P2 / T2
2680 / 273 = 4870 / T
T = 4870 * 273 / 2860
T = 496.38 k
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<h3>SOLUTION:</h3>
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