Chemistry High School

HELP!!! Please answer.

Answers

Answer 1

Answer:

Magnesium dichloride

Explanation:

Answer 2

The answer is magnisum chloride

Related Questions

any matter that does not have a definite shape or a definite volume is an

Answers

gas. gases have no definite volume or shape.

What is the electron configuration for an atom of tin in the ground state?

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Answer:

The ground state electron configuration of ground state gaseous neutral tin is [Kr]. 4d10. 5s2. 5p2 and the term symbol is 3P0.

Potassium, K, had 19 protons, 20 protons, 19 electrons. What is the charge of the atom’s nucleus.

HELP

Answers

Answer:

+ 19

Explanation:

The following data were obtained from the question:

Proton = 19

Neutron = 20

Electron = 19

Charge on nucleus =.?

From a background understanding of the structure of an atom, the nucleus of an atom contains protons and neutrons with the proton being positively charged and the neutron is neutral while the electrons being negatively charged revolve around the nucleus.

From the above question, we understood that the potassium atom has 19 protons which are all positively charged. This simply means that the nucleus has a charge of + 19 since the neutrons are neutral.

Concrete is made of an uneven mixture of gravel, sand, and water. It is _____. homogenous heterogeneous a solution a solute

Answers

heterogeneous, because it does not have a uniform texture

hope That helps

Answer:

Heterogenous, I just took the quiz

Explanation:

Which of the following is an example of a chemical property?
o corrosion
o boiling point
o ability to dissolve
o melting point

Answers

Answer:

Corrosion is your answer

Answer:

▷The answer would be

▶︎corrosion

Explanation:

~corrosion~ is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment

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What is a particle with one positive charge called?

Answers

Answer:

Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom.

Explanation:

Answer:

A proton

Explanation:

A proton is a positive charge found in an atom

Please answer this question, I will give brainliest! You fill a 2.0 L metal thermos with gas at room temperature (25.0 ˚C) and 1.0 atm. Put it in the freezer and the temperature drops to -15.0 ˚C. A. What is the pressure inside the thermos after it cools, in atm? Justify your answer. B. . … and what is that pressure in mmHg?

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e temperature of a 0.750 L gas sample at 25°C and 2.00 atm is changed to 250°C.

Select the option(s) that apply to the item listed: Sugar. *
element
compound
both

Answers

Answer:

Sugar is a element

Explanation:

Using a calculator, what is the density of an unknown object with a mass
of 550 g and a volume of 10 cm3?

Answers

Answer and work pictured below:

What happens when a Bose-Einstein condensate forms?
A. A large atom is split into many smaller atoms temporarily.
B. The atoms of the solid condense into one large superatom.
C. It causes all matter touching it to condense into a liquid.
D. The electrons separate from the nuclei forming a mass of unbound positive and negative charges.

Answers

Answer:

the answer would be B

Explanation:

The atoms of the solid condense into one large superatom. Hence, option B is correct.

What are atoms?

An atom contains a central nucleus surrounded by one or more electrons.

Bose-Einstein condensation occurs at a temperature very close to absolute zero i.e 273.15 degrees centigrade. Under such conditions, a large quantity of Boson occupies the lowest quantum state, at which point microscopic quantum phenomena become apparent macroscopically. A BEC is formed by cooling a gas of extremely low density about one hundred thousandth the density of normal air, to ultra-low temperature.

Hence, option B is correct.

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is magnesium a pure substance????

Answers

Yes magnesium is a pure substance and it is a element.

True or false: Only liquids can be described as fluids. I NEEED HELPP NOWWW

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Answer:

Explanation:

no, as it can also be used to describe a gas- a fluid includes liquids, gases and plasms

List the two factors used to calculate force ? (20 pionts)

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Answer:The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other.

Explanation: i hope it answers your question

Answer:

blah blah blah

Explanation:

What happens when aluminum fills its valence shell? A. Three electrons are gained, creating Al−3. B. Three electrons are gained, creating Al+3. C. Three electrons are lost, creating Al−3. D. Three electrons are lost, creating Al+3.

Answers

Answer:

Explanation:

Answer:

its D I just took the test

Explanation:

2. Jessica did an investigation about the states of matter. As part of the
investigation, Jessica wanted to change a liquid into a solid. What must she do to
bring about this change in state?

Answers

She needs to freeze the liquid change it’s physical state

Jessica had to freeze liquid into solid.

What is the matter?

The matter is anything that occupies space. There are three states of matter: Solid, liquid, and gas.

The process in which a solid turned into liquid is called melting. When the liquid turns into solid is called freezing. The temperature of freezing liquid remains constant. The factors which affect the freezing point of object:

If the intermolecular force of molecules are relatively strong, the freezing point of object will be relatively high.If the intermolecular force of molecules are relatively weak, the freezing point of object will be relatively low.

When water turns into ice that process is called freezing. When water turns into water vapor is called boiling. When gas turns into a solid that process is called condensation.

Therefore, Jessica had to freeze liquid into solid.

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a metal rod weighing 123 g with a temperature of 100 c is placed in a 75 ml of water at 25 c if the final temperature of the metal and water is 29 c what is the specific heat capacity of the metal? assume the density of water is 1.0 g/ml and specific heat capacity of water is 4.184 j/g c

Answers

Answer:

What grade r u in

Explanation:

Just bcauz Ima coo dud and 5=5 and 1=1

What words do we use to talk about a column of the periodic table? (2 CORRECT ANSWERS) Period Group Family Atom Nucleus

Answers

When talking about a column of the periodic table the word we use is (B). Group

Meaning of a group in a periodic table

A group in a periodic table is a column in the periodic table of chemical elements.

In a group, all the chemical elements have similar properties which include; atoms of the same vacancy in valence and valence electron.

Groups have similar physical and chemical properties.

Groups in a periodic table are numbered from number 1 to number 8, and it is numbered from the left to the right side of the periodic table.

In conclusion, When talking about a column of the periodic table the word we use is Group

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25 PTS!

11. The metric prefix for 1/1000 is:
a) centi
b) milli
c) micro
d) kilo

Answers

the answer is milli.

Im pretty sure it’s D. Hope that helps!

There are a equal number of protons and electeons in natural atoms True or false

Answers

Answer:

false

Explanation:

There are a equal number of protons and electrons in neutral atoms.

is nonflammable a physical or chemical property

Answers

physical property

The change of one type of matter into another type (or the inability to change) is a chemical property. Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.

its a physical peoperty

WILL MARK BRAINLIEST

10. When 5.1 x 10^-3 is subtracted from 1.0051 the difference is:
a) 1.0000
b) 1.000
c) 1.00
d) 1.0

Answers

I am pretty sure it’s d, 1.0 hope that helps!

To find the difference between 1.0051 and 5.1 x 10⁻³, subtract the second number from the first number from its decimal form.Thus, the correct option is A.

First, convert 5.1 x 10⁻³to decimal form:

5.1 x 10⁻³ = 0.0051 is the decimal form of the given number 5.1 x 10⁻³.

Then subtract the 2 numbers that is,0.0051 from 1.0051:

1.0051 - 0.0051 = 1.0000 which has 4 digits after the decimal.

So, the difference between the two numbers 1.0051 and 5.1 x 10⁻³ is 1.0000.

Thus,the correct option is a) 1.0000 which is the difference between 1.0051 and 5.1 x 10⁻³.

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The teacher was not in the room yet. Randy began opening containers of chemicals, touching them with his hands. His cheek itches so he rubbed it. Explain how Randy was not acting safety in the the laboratory.

I know the answer I just don’t know how to word it. Please help. Due by 11:59 tonight

Answers

Answer:

Randy went into the classroom without the teacher being present. He opened containers of chemicals without the teacher's consent. Randy is making contact with the chemicals on his skin.

I hope this helps! I haven't done lab science in a while so I'm trying to remember the safety precautions.

Randy went into the classroom without the teacher being present and opened containers of chemical, making contact with chemicals on skin leads to skin reaction.

So Randy should follow the lab safety rules while entering into lab.

What are the important lab safety rules?

After entering lab wear apron and gloves along with safety goggles if working with any hazardous or infectious substance.

Fully aware about the hazards of the materials, properly trained to handle lab equipment, chemicals should be adequately labelled.

Taste or smell chemicals are prohibited, never pour already stored chemicals, chemical hygiene plan should be developed for specific hazards.

Avoid to adopt un-tested and unauthorized experimentation, Clean up all chemical spill, Laboratory induction should be carried out .

Avoid storage of any edible items in the refrigerator along with lab chemicals and specimens, clean the work station after completing experiment and sterilization should be done before starting experiment.

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The top diagram represents a mixture of S atoms and O2 molecules in a closed container.

Which symbolic notation best represents the molecule in the bottom picture?
A) S2O6
B) SO3
C) 2 SO3
D) 2 S and 6 O

Answers

Answer:

S2O6 best represents the bottom picture. When atoms are bonded in a molecule, the number of them is represented as a subscript in a chemical formula.

Explanation:

The symbolic notation that best represents the molecule in the bottom picture is S2O6.

Sulfur is a chemical element that has the symbol S. It also has the atomic number of 16. It should be noted that sulfur is known as the 10th most abundant element that we've in the universe.

It should be noted that S2O6 is the chemical formula for Disulfur Hexoxide. Di simply indicates that there are two sulfur atoms. Hexa indicates that there are six oxygen atoms.

In conclusion, the symbolic notation best represents the molecule at the bottom is S2O6.

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Which ion has a charge of 2-?
Ion A: 8 Protons,10 Neutrons,10 Electrons
Ion E:9 Protons,10 Neutrons,10 Electrons
Ion G:11 Protons,12 Neutrons,10 Electrons
Ion J:12 Protons,12 Neutrons,10 Electrobs

Answers

Answer:

Explanation:

More electrons than protons, thus giving the atom an overall charge of -2

2. Which set of symbols represents isotopes of the same element?
Set 2
Set 1
80
м
38
133
81
M
38
83
M
38
132
Q
55
Q
133
Q
54
55
Set 4
Set 3
50
L
19
50
L
20
50
L
21
91
J
43
92
J
42
93
J
42

Answers

The set of symbols that represents isotopes has been 84/38 M 86/38 M 87/38 M. Thus, option D is correct.

The isotopes are the elements with same atomic number, but different mass number. In an isotope [tex]\rm ^a_bX[/tex], a has been the atomic mass, and b has been the atomic number.

The isotopes will have same value for b, while different values for a.

In the following given sets:

A. 50/19 L 50/20 L 50/21 L

It has same number of mass the atomic number has been different. Thus, the set not represents isotopes.

B. 138/59 Q 133/55 Q 133/54 Q

The given elements, has different atomic number, and different mass number. Thus the set did not represents the isotopes.

C. 91/42 J 92/42 J 93/40 J

The given elements, has different atomic number, and different mass number.Thus the set did not represents the isotopes.

D. 84/38 M 86/38 M 87/38 M

The given set has same atomic number with different mass number.Thus, the set has been the representation of isotopes.

The set of symbols that represents isotopes has been 84/38 M 86/38 M 87/38 M. Thus, option D is correct.

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If some paper and/or paper-like materials ignite and cause a very small fire at your lab table, you should?

Answers

Answer:

Tell your instructor immediately

If the fire is small enough you can try and extinguish it with a fire extinguisher.

Gases deviate from tidal gas behavior because their particles:

Answers

Answer:

Explanation:

At low temperatures or high pressures, real gases deviate significantly from ideal gas behavior.

The kinetic theory assumes that gas particles occupy a negligible fraction of the total volume of the gas. It also assumes that the force of attraction between gas molecules is zero.

I hoped I helped you! :)

Keeping in mind the rules for significant digits, what is the product of 0.8954 m and 2.98 m?

Answers

Answer: 3.240576

Explanation:

There are various ways of doing multiplication this is one of them

The wording "keep in mind the rules for significant digits" implies that we are to use these to show where the decimal place goes by approximating the answer. Then conducting the exact calculation.

Consider 0.8 as 8

2.4

So the solution is some where a bit above 2.4

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Lets just use the numbers

Multiply both 0.8439 and 3.84 by 1000 to get rid of the decimal place. This makes thing more straight forward. So we end up with:

8439

38400

Split up the 38400 into 30000+ 8000 + 400

30000

8439

253170000

8000

8439

67512000

400

8439

3375600

−−−−−−−−−

←

Add

324057600

By our approximation we are expecting the form of

2.4

small amount

So the answer is

3.240576

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Check by calculator:

0.8439

3.84

3.240576

please, please, please help! this assignment is due in a few mins and idk what to do. I will mark the first/best answer brainliest! Why do substances exist as a solid, a liquid, or a gas?

Answers

Answer:

Explanation:

The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid

Do you find the cell membrane in Animal Cells, Plant Cells or Both?

Answers

Answer:Both have cell membranes

both. Both plants and animals have cell membranes

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