What is a reactant of a chemical reaction?

Answer:

The purpose of this lab is to determine the identity of an unknown liquid by measuring its density, melting point, boiling point, and solubility in both water and alcohol, and then comparing the results to the values for the known substance. Hope this helps!! :)

Answer:

classification of mixture​s will be:  solutions, suspensions, and colloids

Hopefully this helped

Answer:

A. Chemical

B. physical

Explanation:

Answer:

A

Explanation:

Answer:

The answer is A

Explanation:

Trial and error :P

Answer: The answer is B. Energy and matter can enter and leave.

Explanation:

Answer:

water at 0C

Explanation:

The colder the water is, the denser it is, so the water here with the lowest temperature, is 0C

Answer:

E = 3.035× 10-¹⁹J = 1.9eV

f = 4.58 × 10¹⁴Hz

Explanation:

wavelength = 6.55 × 10-⁷m

c = 3 × 10⁸m/s

f = ?

E = ?

a) f = c/wavelength

f = 3 × 10⁸/6.55 × 10-⁷

f = 4.58 × 10¹⁴Hz

b) E = hc/wavelength

E = 6.626×10-³⁴ × 3 × 10⁸/ 6.55 × 10-⁷

E = 3.035 × 10-¹⁹J

1ev = 1.6 × 10-¹⁹J

Therefore E = 3.035/1.6 = 1.9eV

Hope it's not too late man

The modern periodic table consists of the elements which are arranged in the increasing order of their atomic numbers. The element 'C' belongs to 14th group of the periodic table. The correct option is A.

The orbital diagrams are the pictorial representation of the electrons in an atom. The orbital diagrams are mainly based on the Auf Bau principle, Pauli's exclusion principle and Hund's rule of maximum multiplicity.

According to Auf Bau principle, the electrons are arranged in the orbitals in the increasing order of their energies. The pauli's exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers.

The hund's rule states that the unpaired electrons in the orbitals have parallel spins. The atomic number of 'C' is 6, and its electronic configuration is 1s²2s²2p².

Thus the correct option is A.

To know more about orbital diagrams, visit;

https://brainly.com/question/11270343

#SPJ7

Answer: ok so you have to do is 2+11

Explanation:

Answer:

occur gradually over millions of years.

Answer:

c

Explanation:

because i asked alexa and it told me hehr

Answer:

C.3

13AL

2.8.3

The number of electrons from the outermost shell is the valence of the element.

Answer:

Explanation:

Just divide the mass of how much AgCl by the mass per mole to give you the number of moles, 573.28g 143.318gmol−1 AgCl = 4.00molAgCl

Hope this helps! <3

Answer:

Average atomic mass  = 20.180 amu.

Explanation:

Given data:

Abundance of X-20 = 90.48%

Atomic mass of X-20 = 19.992 amu

Abundance of X-21 = 0.27%

Atomic mass of X-21 = 20.994 amu

Abundance of X-22 =  9.25%

Atomic mass of X-22 = 21.991 amu

Average atomic mass = ?

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) +(abundance of 3rd isotope × its atomic mass)   / 100

Average atomic mass = ( 90.48×19.992)+(0.27×20.994)+(9.25+ 21.991 ) /100

Average atomic mass = 1808.88  + 5.668+203.42 / 100

Average atomic mass  = 2017.968 / 100

Average atomic mass  = 20.180 amu.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{3}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer: B. Winter

Explanation: The southern hemisphere is leaning towards the sun meaning that that hemisphere is closer to the sun therefore it is summer and spring. With the northern hemisphere and north america leaning away from the sun, it is farther away meaning it is winter.

Answer:

hi

Explanation:

There is enough energy in air at room temperature to change some liquids to gases. The temperature of ice water is lower than the temperature of dry ice in alcohol. Carbon dioxide can change directly from the solid phase to the gaseous phase. ... Absolute zero is the temperature at which there is no molecular motion.

Answer: True

Answer:

just see it it will help trust me its my school work

Explanation:

Answer:

C are part of the Protista kingdom

Explanation:

The Protista, or Protoctista, are a kingdom of simple eukaryotic organisms, usually composed of a single cell or a colony of similar cells. Protists live in water, in moist terrestrial habitats, and as parasites and other symbionts in the bodies of multicellular eukaroytes.

Other eukaryotic kingdoms—the Plantae, Fungi, and Animalia—are each believed to be monophyletic . That is, all plants evolved from one ancestral plant, all animals from one ancestral animal, and all fungi from one ancestral fungus. The Protista, however, are not; they are almost certainly polyphyletic and did not arise from a single ancestral protist. Rather, the Protista are a category of miscellaneous eukaryotes, not closely related to each other and not sharing many characteristics, but not fitting any other kingdom of life. Some authorities divide the Protista into as many as twenty-seven phyla, and some feel the Protista should be discarded as a kingdom name, and these organisms divided into as many as twelve kingdoms.

Historically, the Protista were divided into three main categories: the plantlike algae, animal-like protozoans, and funguslike slime molds. This classification persists in many elementary textbooks; however, current molecular evidence indicates that these are not natural groups related by common descent, but groups with merely superficial , deceptive similarities.

Classifying them together is probably no more scientific than it would be to classify bees, birds, and bats in one group simply because they all have wings and fly. The two flagellated protozoan groups called trypanosomes and dinoflagellates, for example, are probably less related to each other than a human is to a fish. Genetic evidence (base sequences in their mitochondrial deoxyribonucleic acid [mtDNA] and ribosomal ribonucleic acid [rRNA]) now indicates that the following are more natural (evolutionarily related) groups of Protista.

These are the most primitive protists. Some lack mitochondria and suggest what the first eukaryotes may have been like, while others have primitive mitochondria that closely resemble bacteria. Some basal Protista without mitochondria are Trichomonas, a vaginal parasite of humans; Giardia, an intestinal parasite; and Entamoeba, the cause of amoebic dysentery. The lack of mitochondria is not necessarily the primitive (original) condition of all these protists, however. Although Giardia lacks mitochondria, it does have mitochondrial genes. Apparently it once had mitochondria, and these genes transferred to its nuclear DNA before the mitochondria were lost.

Basal Protista with mitochondria include Trypanosoma, a genus of blood parasites that cause African sleeping sickness and other diseases; Euglena, a green freshwater flagellated protozoan with chloroplasts; and Physarum, a common terrestrial slime mold.

pls give brainiest my hand hurts ;-:

Answer:

Steam is a covalent compound.

Explanation:

beacause metallic compound is a compound that contains one or more metal elements bonded to another element. And steam is  the invisible vapor into which water is converted when heated to the boiling point.

Answer:

Genetic Engineering

Explanation:

AP3X

Film badges is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation.

A panel or layers of photographic film covered with black paper and exposed to air ,salt,and other chemicals on clear acetate

Answer:

layers of photo graphic film covered in black paper

Explanation:

The badge consists of two parts: photographic film and a holder.[1] The film emulsion is black and white photographic film with varying grain size to affect its sensitivity to incident radiation such as gamma rays, X-rays and beta particles.

Answer is B-  F has a smaller radius than F− because an additional electron causes greater repulsion in F− is the correct choice and the nuclear charge the radius of the anion increases.

Explanation: I hoped that helped!

The one that have larger radius is F-. The correct option is C.

A chemical element's atomic radius is a measurement of the size of its atom, usually the mean or typical distance from the nucleus's center to the outermost isolated electron.

Because a boundary is not a well-defined physical entity, various non-equivalent definitions of atomic radius exist.

As the number of energy levels decreases down a group, the distance between the nucleus and the outermost orbital increases.

As a result, the atomic radius expands. The ionic radius is the distance between the nucleus and the ion's electron cloud's outer edge.

Because they have fewer shells, F and F- are both smaller than the rest. F- now has one more electron than F, causing the radius to increase.

Thus, the correct option is C.

For more details regarding atomic radius, visit:

https://brainly.com/question/14544878

#SPJ2

Answer:

same what

Explanation:

Answer:

4. c) Lose only 3 electrons

5. d) Nitrogen.

Your answers are correct

Answer:

20 and 24 are chemical the rest are physical

Answer:

1. Fireworks: chemical,

2. Hair: physical

3. glow sticks: chemical

4.Baseball: physical

5.Popcorn: chemical

Explanation:

1. bc there are chemicals/powders

2. the hair is still hair, even if it is cut

3. You are combining chemicals, this cannot be un-done

4. The shards are still glass, they do not turn into another substance other than glass

5. You heated the popcorn, it "exploded", this cannot be undone