D Question 17 5 pts If the probability of rain is 85%, then the probability of no rain is: O 85 % 25 % O 15 % O 50 %

Answers

Answer 1

Answer: If the probability of rain is 85%, then the probability of no rain would be 100% - 85% = 15%. Therefore, the correct answer is 15%.

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Give an example of a 2 phase mixture and describe how you would separate the substances

Answers

First, we should define what a mixture and a two-phase mixture mean.
A mixture is a combination of two or more substances without any chemical reaction occurring between them. Components of a mixture can be separated using physical methods such as heating, filtering, evaporation, .... etc
A two-phase mixture is a type of mixture that contains two different phases of matter, for example solid and liquid phases in one mixture or liquid and gas phases in one mixture.

Now, we can give examples of two-phase mixtures and mention how to separate them:
A mixture of sand and water is considered a two-phase mixture (sand is sold and water is a liquid).
The components can easily be separated using filtration where the sand will remain on the filter paper and water will pass.

Another example is a mixture of sugar and water (sugar is a solid and water is a liquid).
The components can be separated by heating. We can eat the mixture until water evaporates and the sugar is precipitated. The evaporated water can then be condensed into a different container.

Hope this helps :)

$\boxed{{\text{Mixture of sand and water}}}$ is an example of two-phase mixture and this can be separated by $\boxed{{\text{filtration}}}$ .

Further explanation:

Mixture:

The material that is made up of two or more substances is called a mixture. It has no fixed formula and its composition is also varied. All the individual constituents retain their properties after the formation of the mixture.

Types of mixtures:

1. Homogeneous mixtures

Homogeneous is a Latin word that means the same. These mixtures have a uniform composition throughout. These types of mixtures consist of a single phase only. Air, orange juice and blood are the examples of a homogenous mixture.

2. Heterogeneous mixtures

Heterogeneous is a Latin word that means different. These mixtures that have non-uniform composition throughout. These mixtures have more than one phase. Concrete, soda and chocolate chip cookies are the examples of a heterogeneous mixture.

Characteristics of mixtures:

1. It has a variable composition and has no formula.

2. Mixtures are not formed by any chemical reactions.

3. Mixtures can be either homogeneous or heterogeneous.

4. The constituents of the mixtures can be separated by physical methods such as filtration, heating, drying, distillation, crystallization.

5. The properties of the individual particles of the mixture are retained even after the formation of mixtures.

A mixture of sand and water is an example of a two-phase mixture. Here sand is a solid whereas water is a liquid. The components of the mixture are separated by filtration. Sand will remain on the surface of filter paper while water passes through it.

Learn more:

1. Characteristics of a mixture: brainly.com/question/1917079

2. Example of physical change: brainly.com/question/1119909

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Elements, compounds, and mixtures

Keywords: mixture, characteristics, formula, composition, properties, chemical reactions, filtration, distillation, heating, crystallization, homogeneous, heterogeneous, solid, liquid, sand, water, filter paper.

Which chemicals previously used in products such as refrigerants, aerosol sprays, and cleaning products contributed to the depletion of the ozone layer

Answers

Answer:chlorofluorocarbons (CFCs) could deplete Earth's atmospheric ozone layer, which blocks the sun's damaging ultraviolet rays. When the scientists reported their findings in 1974, CFCs were widely used as refrigerant gases and as propellants in aerosol sprays

Explanation:

What is kinetic energy? A. the energy an object has due to its motion B. the energy derived from chemical reactions C. the energy an object has due to its position D. the energy an object releases as heat

Answers

Answer: Option (a) is correct.

Explanation:

When an object moves from its initial position, it acquires some energy. This energy is called kinetic energy, as it is governed by the motion of an object.

The formula to calculate kinetic energy is as follows.

kinetic energy = $\frac {1}{2}mv^(2)$

where,

m = mass of object

v = velocity of object

Thus, it is concluded that kinetic energy is the energy an object has due to its motion.

The energy an object possesses due to its motion.

What are the two parts of an atom?the nucleus and the proton cloud
the neutron and the electron cloud
O the neutron and the proton cloud
O the nucleus and the electron cloud

Answers

Answer:

the nucleus and electron cloud is the correct option

Atoms of different isotopes of the same element differ in their total number of electrons neutrons protons valence electrons

Answers

The ans is neutrons. Isotopes of the same element have the same number of protons(and neutrons) but different number of neutrons.

An ionic bond would most likely form between atoms of which of these pairs?A. oxygen and oxygen
B. magnesium and oxygen
C. magnesium and magnesium

Answers

Magnesium and oxygen would form an ionic bond because magnesium is a metal and oxygen is a nonmetal, and metals and nonmetals usually form ionic bonds.

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