Answer: 0.050 moles of NaOH
Explanation: The molar mass of NaOH is 40.0g/mole
2.0g/40.0g/mole = 0.050 moles (2 sig fig)
What is the density of water (in g/mL) to four significant figures at 20°C?
ANSWER:
I calculated it in g/cm^3, It equals 0.9982 g/cm^3
The density of water at 20°C is found to be 0.9982 g/mL.
What is Density?Density may be defined as the classical measurement of quantity or mass per unit of volume in a particular substance. According to mathematics, density is simply characterized as mass divided by volume. That is:
[tex]Density = \frac{Mass }{Volume }[/tex]
Density typically describes how much space an object or substance takes up in relation to the amount of matter in that object or substance.
Density only significantly depends on the mass of the body as well as the volume occupied by it. The SI unit of density is kg/[tex]m^3[/tex]. The density remarkably does not vary much with respect to the temperature.
Therefore, the density of water at 20°C is found to be 0.9982 g/mL.
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What did the Copernican revolution demonstrate?
A. That science was limited to theories that could be tested
B. That science was a process of changing ideas
C. That science was only accurate when expensive equipment was
used
D. That science was not reliable and could not be trusted
Answer:
i think it's B.
Explanation:
What kind of mixture is a graham cracker?
Answer:
so here is the answer (What kind of a question my freind
Explanation:
Graham crackers are a whole wheat sweet cookie used in baking and making S'mores. Did you know that Graham crackers are called that because they're made from Graham Flour? It's a flour similar to conventional whole wheat flour in that both are made from the whole grain, but Graham flour is ground more coarsely.
Jane and Jack have a bicycling competition Jane rides a constant speed of 12 miles per hour while Jack rides at a constant speed of 330 feet per minute. How fast are Jane and Jack going in meters per second? Who finishes first? Show your factor-label method work. There are 5280 feet in one mile. There are 3.281 feet in one meter
Answer:
Explanation:
I don't know how you want the conversion done. I use dimensional analysis.
Jane
12 miles / hour [1.6 km/1 mile][1000 m/1 km][1 hour / 3600 sec]
12 * [1.6 * 3600 / 1000 m/s] = 69.12 m/s
5.33 m/s This answer is a bit shorter than using 5280 feet.
Using 5280 feet
12 miles / hour [5280 ft/1 mile] [1 m/3.281 feet] * [1 hr/3600 sec]
12 * 5280 / (3.281 * 3600)
12 *. 4470
5.36
Jack
330 feet / minute [ 1 meter / 3.281 feet] [1 minute / 60 seconds]
330 * 1/(3.281 * 60)
330 * 1/(196.86)
1.676 m/s
She's going faster than he is, no matter which method is used to do the calculation
Decomposition of bark of bracket fungi
a
Chemical Change
b
Physical Change
Answer:
Both.
Explanation:
In decomposition, two processes occur. Firstly, because of chemical change the colour of the top layer is transformed. And secondly, due to first reaction it turns into bark and it's a physical change.
So both the changes are the part of decomposition reaction.
The decomposition of the bark of fungi is a chemical change. So the correct option is A.
What is decomposition?The word decomposition literally means “to break down”. The process usually relates to the disintegration of the complex organic matter into a simpler inorganic matter. It is a very significant and essential process of the ecosystem.
Hence, decomposition is a metabolic process, performed by living organisms. They take up raw materials in the form of complex compounds, turn process and then convert it into simpler compounds.
Bacteria, fungi, and a few other microorganisms are known as decomposers and they can initiate the process of decomposition. They survive on dead organisms by feeding on them.
The dead and decaying animals and plants are able to serve as raw materials. Upon their breakdown, they produce nutrients, carbon dioxide, water, etc. Dead animals, plants, and their remains are called detritus. This detritus is used by plants and are collectively known as saprophytes.
Therefore, the correct option is A.
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What is a claim? (Please check all that apply)
An answer to a question that's asked.
A fact you're asserting is true.
Data from graphs and observations.
An explanation.
Answer:
Claim: It is an answer to your question
Explanation:
HELP! Fill in the blanks:
The net charge of an atom is equal to the difference between the_____
in the atom's nucleus and the_____
Answer:
I don't know
Explanation:
is today your test
List nonscientific careers that use chemistry.
Non scientific careers are the careers that do not involve a person studying science courses or pursuing fields related to sciences.
Some of the nonscientific careers that use chemistry include:
Astrophysicist: An individual who studies the universe and its contents, such as the planets, stars etc. ProfessorSales: Those in the sales department may be involved in the use of chemicals.LawyerChefFarmer: A farmer can make use of chemicals such as herbicides, pesticides etc in controlling herbs and pests in his farm.Technical Writer: A writer may need to study and learn about a chemical or make use of it for his writing purpose.Read related link on:
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If empirical formula and molar mass of a compound is P2O5 and 142 respectively. the molecular formula of the compound will be....
Answer:
molecular formula = molar mass ÷ empirical formula
n = 142 ÷ 142
n = 1
molecular formula (P2O5)1 = P2O5
The formula F= 9/5C + 32
changes a temperature reading from the Celsius scale C to the Fahrenheit scale F. What is the temperature measured in degrees Fahrenheit when the Celsius temperature is 10 (DEGREES) C?
Answer:
yes it is c=mxb okay
Explanation:
Arrange the elements in order of increasing ionization energy. chlorine, fluorine, gallium, phosphorus
Answer: Ga, P,Cl, F
Explanation:
Cl 1314 kJ/mole
F 1681 kJ/mole
Ga 579 kJ/mole
P 1012 kJ/mole
Which option is an isotope with 6 protons and 8 neutrons?
* oxygen-6
* oxygen-14
*carbon-14
*carbon-8
Answer:
carbon-14
Explanation:
becouse protons and neutrons are nagetivly charged
what is the volume of a substance with a mass of 64.9 g/ and a density of 2.1 g/ml?
what is the density of a rock with a volume of 5 mL and a mass of 13.5
0.37 g/mL
67.5 g/mL
2.7 g/mL
13.5 g/mL
Answer:
Density is 2.7 g/ml³
Explanation:
[tex]density = \frac{mass}{volume} \\ [/tex]
mass » 13.5 g
volume » 5 ml³
[tex]density = \frac{13.5}{5} \\ \\ = 2.7 \: {g \: ml}^{ - 3} [/tex]
Answer:
[tex]\boxed {\boxed {\sf 2.7 \ g/mL}}[/tex]
Explanation:
Density is a substance's mass per unit volume. The formula for calculating density is as follows.
[tex]\rho= \frac{m}{v}[/tex]
The mass of the rock is 13.5 grams and the volume of the rock is 5 milliliters.
m= 13.5 g v= 5 mLSubstitute these values into the formula.
[tex]\rho= \frac{13.5 \ g}{5 \ mL}[/tex]
Divide.
[tex]\rho= 2.7 \ g/mL[/tex]
The density of the rock is 2.7 grams per milliliter.
surely help:) I’ll brainlist!
Answer:
A. The product formed have more energy than the reactants.
This is because it is an endothermic reaction.
[tex].[/tex]
26,470 centimeters to meters
Answer:
264.7
Explanation:
26470 cm = 264.7 m
just move the decimal over two spaces.
How does modern periodic table explain the cause of periodicity.
Answer:
The cause of periodicity in properties is the repetition of similar outer electronic configuration after certain regular intervals. For example, all the elements of group 1 i.e. alkali metals have a similar outer electronic configuration, ns1.
summarize why error is important.
The jewelers' mass unit for diamond is the
carat. By definition, 1 carat equals ex-
actly 200 mg.
What is the volume of a
1.07 carat diamond? The density of diamond
is 3.51 g/cm
Answer in units of cm".
Answer:
0.75 cm
Explanation:
You will convert 1.07 carat into mg then into g. You will multiply its reciprocal by 3.51g/cm to get the answer.
4. List three (3) safety rules when using a Bunsen burner.
1.
2.
3.
Answer:
1. place the bunsen burner away from any overhead shelving, equipment or lights by at least 1 foot.
2. remove all un-needed supplies and excess chemicals from the area.
3. tie-back any long hair, take off loose jewlery, or change out of loose clothing.
4.4 x 10^-9
What’s this in standard form or scientific notation
Answer:
How to Convert a Number to Standard Form
Move the decimal point in your number until there is only one non-zero digit to the left of the decimal point. ...
Count how many places you moved the decimal point. ...
Write your scientific notation number as a x 10b and read it as "a times 10 to the power of b."
Explanation:
what will happen to the atoms or sbstance when it is condenses
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.
Hope it helps!
Brainliest pls!
Follow me! :)
What is a net ionic equation?
Answer :
a chemical equation in
which the electrolytes in aqueous
solution are expressed as dissociated
ions.
Have good day !!
write the chemical formula for the following compound -magnesium chloride, zinc sulphide Sodium,sodium sulphate, calcium bicarbonate.
Answer:
magnesium chloride: MgCl2
zinc sulphide: ZnS
sodium sulphate: Na2SO4
calcium bicarbonate: Ca(HCO3)2
Can someone please help me with this
Answer:
Explanation:
cant see the screen really
Why is large-scale nuclear fission a rare phenomenon on Earth?
Answer:
Large-scale nuclear is fission a rare phenomenon on Earth because
atoms that undergo fission aren't concentrated enough to sustain a chain reaction.
Hope it helps you.Answer:
Atoms that undergo fission aren't concentrated enough to sustain a chain reaction. For example, the decay chain of U-238 is called the uranium series. ... Uranium is find in ores on Earth with very law mass percentage in it, so fission is not possible
Tell electronic configuration of Copper?
Answer:
1s22s22p63s23p64s23d9
Explanatihe neutrlon:
Tell electronic configuration of Copper?
Copper is atomic # 29 so it has 29 protons.
The neutralatom must have 29 negative charges to balance the 29
positive charges, so it has 29 electrons.
Our electron configuration must account for all 29 electrons
Look at a Periodic Table
cture from
find copper #29
let us "AUF-BAU" ( buld up) the copper electronic configuration from the Periodic Table.copper #29 is in th 4th row.
To "build up", start at row 1. this is the 1st energy level. there are noly 2 elements H and He, so it is only an "s" robital. with 2 e's. so
1s2ve 2 e's in an s orbital and 6 in p orbitals,
at row 2 (energy level 2) we have 2 e's in an s orbital and 6 in p orbitals, so
building on top of row 1, we have
1s22s22p6
at row 3 we repeat and so have
1s22s22p63s23p6
at row 4 we start with 2 e in an s orbital at the 4th energy level, so we
have
1s22s22p63s23p64s2
we now enter the d orbtals, and copper has 9 electrons in the d orbitals.
but these d orbitals are only slightly at energy level 4. because of their more complex shape, most of the orbital is in the 3rd energy level, so
we buld up for copper, #29
1s22s22p63s23p64s23d9
count the electrons and add them:
2 + 2 +6 +2 +6 +2 +9 = 29 copper's number
Calculate the no. of moles in 25gm of calcium phosphate
PLz Fast
answer/
1 grams Calcium Phosphate to mol = 0.00322 mol
no. of moles= 0.00322×25
no. of moles = 0.0805
An element cannot ________. a be part of a homogeneous mixture b be a pure substance c interact with other elements to form compounds d be part of a heterogeneous mixture e be separated into other substances by chemical means
Answer:
b be a pure substance
Explanation:
matter is not created or destroyed in any chemical or physical
a. law of conservation of mass
b. chemical change
c. physical change
d. wood
Answer:
a
Explanation:
everything can be broken down to a smaller less useful compounds but never destroyed