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bogdanovich [222]
3 years ago
5

Express the following numbers as standard form: a) 1.52 x 10^-2 b) 7.78 x 10^-8

Chemistry
1 answer:
Vikentia [17]3 years ago
4 0

Answer:

0.0152

0.0000000778

Explanation:

You just need to more the decimal as many times as the exponent to the to the left if it is negativa and to the right if it is positive.

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The liter is a measurement of which of the following qualities volume,teampature,mass,density
Doss [256]

Answer:

Volume

Explanation:

Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or 3D shape occupies or contains.[1] Volume is often quantified numerically using the SI derived unit, the cubic metre. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces. Three dimensional mathematical shapes are also assigned volumes. Volumes of some simple shapes, such as regular, straight-edged, and circular shapes can be easily calculated using arithmetic formulas. Volumes of complicated shapes can be calculated with integral calculus if a formula exists for the shape's boundary. One-dimensional figures (such as lines) and two-dimensional shapes (such as squares) are assigned zero volume in the three-dimensional space.

The volume of a solid (whether regularly or irregularly shaped) can be determined by fluid displacement. Displacement of liquid can also be used to determine the volume of a gas. The combined volume of two substances is usually greater than the volume of just one of the substances. However, sometimes one substance dissolves in the other and in such cases the combined volume is not additive.[2]

In differential geometry, volume is expressed by means of the volume form, and is an important global Riemannian invariant. In thermodynamics, volume is a fundamental parameter, and is a conjugate variable to pressure.

7 0
3 years ago
5.0 x 10^24 molecules equal how many liters
Whitepunk [10]
You can youse a calculator or ask a teacher

4 0
2 years ago
Why is photosynthesis an endothermic reaction?
diamong [38]

Answer: Option (c) is the correct answer.

Explanation:

Photosynthesis is a process in which sunlight, carbon dioxide, and water is used by the plants to make their on food.  

Plants absorb energy in the form of heat from the sunlight and thus produce glucose and oxygen from carbon dioxide and water. This absorbed energy is then used to start various chemical and biochemical reactions in the plants.

Hence, photosynthesis is an endothermic reaction.

Thus, we can conclude that a large amount of energy is required to activate the reaction.

4 0
3 years ago
Read 2 more answers
The first step in the two-step process of making a solution is the breakdown of the solute source into ____________."
Troyanec [42]
<h3><u>Answer;</u></h3>

Atomic particles

The first step in the two-step process of making a solution is the breakdown of the solute source into <u>atomic particles</u>.

<h3><u>Explanation</u>;</h3>
  • Solution is a homogeneous mixture of two or more substances uniformly dispersed throughout a single phase
  • <em><u>The liquid component that makes up the largest part of a solution is called the solvent, and the substance that is dissolved is called the solute.</u></em>
  • Unsaturated Solution is a solution that contains less solute than a saturated solution does and that is able to dissolve additional solute, while saturated Solution is a solution that cannot dissolve any more solute under the given conditions
7 0
3 years ago
Which statement correctly describes a sample of gas confined in a sealed container?
Aleksandr [31]
The correct option is 2.
Gases has some properties which are specific to them, one of these properties is that, gases usually take the shape and the volume of any container in which they are confined. This means that, when a gas is sealed up in a container, the gas will fill up all the space inside the container.
Thus, gases have no definite shape and no definite volume, they take the shape and the volume of their containers. Also, the forces of attraction between gas molecules are very weak, that is why their particles are far apart.<span />
5 0
2 years ago
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