standard units of measure for density

Answers

Answer 1

Answer:

g/cm³ for solids,

g/ml for liquids

g/L for gases.

Explanation:

Though SI unit of density is kg/m³, for convenience we use g/cm³ for solids, g/ml for liquids and g/L for gases. Mathematically, density is defined as mass divided by volume:   ρ=m/V    


Related Questions

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  

×

1

10

3

×

8

×

1

10

=

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

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:

B

Explanation:

Answer:

its  D  I  just  took  the  test

Explanation:

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:

A

Explanation:

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

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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Completely classify jet fuel.
Element
Heterogeneous Mixture
Pure Substance
Compound
Homogeneous Mixture
Mixture

Answers

Answer:

Mixture

Explanation:

A mixture is defined as a material formed from the combination of two or more different substances.

Jet fuel is a mixture of hydrocarbons including crude oil petroleum and kerosene or gasoline. Jet fuels are made by the process of refining and blending of different petroleum and kerosene.

Hence, the correct option is "Mixture".

which of the following is a scientific law?

Answers

climate changing a

nodvnfosdjfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfv

its a

Answer:

Climate change

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

Answers

Answer:

Sugar is a element

Explanation:

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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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

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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Express a mass of 0.056 mg in grams.
Answer in units of g.

Answers

Answer:

0.000056g

Explanation:

1 mg = 0.001 g

Or if it helps move your decimal sign over left 3 places.

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:

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

why does neon have a higher first ionization energy than fluorine

Answers

I’m just here for the points sorry

Diffrentiate between atoms and ions.

Answers

Hello. What is an Atom?
The smallest unit of matter. It is indivisible and consists of neutrons, electrons and protons. Atoms can take part in chemical reactions. Combination of atoms together forms molecule. Always the number of protons and electrons are equal. Independent life may or may not be feasible within a solution. Nucleus of the atom is formed by protons and neutrons. Surrounding the nucleus are the electrons.

What is an Ion?
Atoms where the electrons and protons are not equal are called ions. Ions are charged particles. They can be either positively charged ions or negatively charged ions. If an atom is charged electrically it is considered an ion. If an atom contains maximum number of electrons than protons, then it is called anion. If an atom contains maximum number of protons than electrons, then it is called cation. Independent existence in a solution. When an atom gains or loses electrons, ion is formed. Hope it helps

Explain what you think a compound is

Answers

Answer:

a thing that is composed of two or more separate elements; a mixture.

Explanation:

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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Which answer below correctly identifies the type of change and the explanation for the boiling of water?
physical change because even though the change caused the temperature of the water to increase,
the water's physical properties remained exactly the same
physical change because even though gas formation was observed, the water was undergoing a
state change, which means that its original properties are preserved
chemical change because gas formation was observed, which indicated that the water was
transformed into a different substance
0 chemical change because a temperature change was observed, which indicated that the water was
transformed into a different substance

Answers

Answer: physical change

Explanation:

as the water heats up the atoms begin to move faster changing the physical form

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

Answers

Answer:

Explanation:

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

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

✦plz mark me as  brainliest☑︎

✭i only need 3 more brainliest then my lvl will go upp

Give me a hand,Solve this problem,Need everyone's help​

Answers

Answer:

A. 8.8 g.

B. 5.3 g.

C. 449 g.

Explanation:

A. Determination of the mass of CO2.

Mole of CO2 = 0.2 mole

Molar mass of CO2 = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO2 =?

Mole = mass /Molar mass

0.2 = mass of CO2 /44

Cross multiply

Mass of CO2 = 0.2 × 44

Mass of CO2 = 8.8 g

B. Determination of the mass of Na2CO3.

Mole of Na2CO3 = 0.05 mole

Molar mass of Na2CO3 = (2×23) + 12 + (3×16)

= 46 + 12 + 48

= 106 g/mol

Mass of Na2CO3 =?

Mole = mass /Molar mass

0.05 = mass of Na2CO3 /106

Cross multiply

Mass of Na2CO3 = 0.05 × 106

Mass of Na2CO3 = 5.3 g

C. Determination of the mass of Fe(OH)2.

Mole of Fe(OH)2 = 5 moles

Molar mass of Fe(OH)2 = 55.8 + 2(16 + 1)

= 55.8 + 2(17)

= 55.8 + 34

= 89.8 g/mol

Mass of Fe(OH)2 =?

Mole = mass /Molar mass

5 = mass of Fe(OH)2/89.8

Cross multiply

Mass of Fe(OH)2 = 5 × 89.9

Mass of Fe(OH)2 = 449 g.

When moving down a Column in the periodic table what stays the same ?

Answers

Answer:

Explanation:

When we go down in a column , we are going down in a period . In going down , one additional orbit go on adding to the atom . But the total number of electrons in the outermost orbit which is also called valence electron remains the same .

For example , when we go down in the first   group A , the outermost orbit go on changing like 1 s¹ , 2 s¹ , 3 s¹ . 4 s ¹ etc which represents hydrogen , lithium . sodium , potassium etc.

So we see that , it is number of valance electrons that remains constant.

60 N net force is applied to a 12 KG box. What is the acceleration of the box?

Answers

Answer:

The answer is

5 m/s²

Explanation:

The acceleration of an object given it's mass and it's net force can be found by using the formula

[tex]acceleration = \frac{force}{mass} \\ [/tex]

From the question

force = 60 N

mass = 12 kg

So we have

[tex]acceleration = \frac{60}{12} \\ [/tex]

We have the final answer as

5 m/s²

Hope this helps you

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

Will give Brainlist!!!!!!! PLEASE HELP! Express the results of the following calculations with the correct number of significant figures: 5502.5 + 21 + 0.06

Answers

0.06 has one significant figure (unless there are zeros written after it). So I would round the result to 6000. Some teachers prefer at least 2 significant figures though.

Explain how NOTHING is ZERO, but ZERO is more than NOTHING?

Answers

Answer:

Nothing can be zero, but zero isn't nothing. If someone asks you if you have money and you say "I've got nothing!" when you actually don't have a cent, then you have zero money. However, zero is a number, so it itself is something, therefore more than nothing. So technically, you do have something.

When zero is on a number line, you could classify it as nothing, but it is the number between 1 and -1. Hypothetically speaking, if you took the zero away, wouldn't the number line be the same?

Zero isn't positive or negative. The number zero on a graph, or in a coordinate can tell you where something is. Zero can be a word to describe if something is existent, or non-existent.

Okay, my brain hurts.

Write the net ionic equation for the acid-base reaction of hydrochloric acid with phosphine. (Include states-of-matter under the given conditions in your answer.)

Answers

The net ionic equation for the acid-base reaction of hydrochloric acid with phosphine is PH3(aq) + H⁺(aq)  → PH⁺₄ (aq)

What is a Chemical reaction?

A chemical reaction shows us how substances interact which brings about  changes in the  composition of the  reactants. Two types of Chemical reactions includes:

the net ionic equation balanced chemical equation.

The net ionic equation of a  chemical equation tells us only elements and ions directly involved in the chemical reaction.

Now for the reaction of hydrochloric acid, HCl with phosphine, PH3,

First write the aqueous substances in their ionic components

PH3(aq) + HCl(aq)→ PH4Cl(aq)

PH3(aq) + H⁺(aq) +Cl⁻(aq) → PH⁺₄ (aq) + Cl⁻(aq)

Then we  remove the ions that do not take part in the reaction,  Cl⁻(aq)

So we are left with

PH₃(aq) + H⁺(aq)  → PH⁺₄ (aq)

Therefore, the net ionic equation for the reaction of hydrochloric acid with phosphine is PH₃(aq) + H⁺(aq)  → PH⁺₄ (aq)

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Carbon dioxide in the air dissolves in rain as it falls to Earth. This results in the formation of carbonic acid, a weak acid. Explain why the student blowing into test tube B is similar to the process of forming slightly acidic rain.

Answers

Explanation:

Acid rain :

Acid rain is also known as acid deposition. It may be defined as a form of precipitation of the acidic components like nitric acid or sulfuric acid and fall to the earth surface from the atmosphere.

In the context, the student doing the experiment blows air in to the test tube B containing chalk dipped in water is similar to the process of acidic rain as it results in the formation of a weak carbonic acid when the carbon dioxide present in the air mixes with the chalk in the form of calcium carbonate.

Carbon dioxide reacts with water to from carbonic acid which dissociated into hydrogen ion and hydrogen carbonate ion.

I really need help with this before 5:10
Show your work

Your big brother has been brageing about how he can bench press 4.000 grams at the gym. Sounds impressive.
but you know better. Use your skills to find how many pounds of weight he is actually pressing.

Answers

CAN YOU HELP ME ANWSER MINE ILL HELP YOU

- Write down Rutherford's atomic model with diagram .also write down defects of Rutherford's atomic model. - write down neil bohar atomic model

Answers

this is the answer

sorry if the answer is wrong

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