Answers
Answer:
The Internet started in the 1960s as a way for government researchers to share information. ... This eventually led to the formation of the ARPANET (Advanced Research Projects Agency Network), the network that ultimately evolved into what we now know as the Internet.
Related Questions
Convert 4.36 x 1025 molecules of CH,OH to moles.
Answers
Answer:
The answer is 72.43 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
From the question
N = 4.36 × 10^25 molecules
We have
[tex]n = \frac{4.36 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 72.425249...[/tex]
We have the final answer as
72.43 molesHope this helps you
How can one kg of iron melt more ice than 1 kg lead at 100 °C
Answers
Answer:
Due to the specific heat capacity of iron, 0.444 J/(g·°C), is more than the specific heat capacity for lead, 0.160 J/(g·°C)
Explanation:
The given parameters are;
The metals provided to melt the ice and their temperature includes;
One kg (1000 g) of iron;
Specific heat capacity = 0.444 J/(g·°C)
Temperature = 100°C
1 kg (1000 g) of lead
Specific heat capacity = 0.160 J/(g·°C)
Temperature = 100°C
Therefore, the heat provided to the ice of mass m, and latent heat of 334 J/g at 0°C by the metals are as follows;
For iron, we have;
ΔQ = Mass × Specific heat capacity × Temperature change
ΔQ[tex]_{iron}[/tex] = Heat obtained from the iron by the ice
ΔQ[tex]_{iron}[/tex] = 0.444 m × 1000 × (100 - 0) = 44400 J
Heat absorbed by the ice for melting, H[tex]_l[/tex] = Heat obtained from the iron
∴ Heat absorbed by the ice for melting, H[tex]_l[/tex] = Mass of ice × Latent heat of ice
H[tex]_l[/tex] = Mass of ice × 334 J/g = 44400 J
Mass of ice melted by the iron = 44400 J/334 (J/g) ≈ 132.9 g
Mass of ice melted by the iron ≈ 132.9 g
For lead, we have;
ΔQ = Mass × Specific heat capacity × Temperature change
ΔQ[tex]_{lead}[/tex] = Heat obtained from the iron by the ice
ΔQ[tex]_{lead}[/tex] = 0.160 m × 1000 × (100 - 0) = 16000 J
Heat absorbed by the ice for melting, H[tex]_l[/tex] = Heat obtained from the iron
∴ Heat absorbed by the ice for melting, H[tex]_l[/tex] = Mass of ice × Latent heat of ice
H[tex]_l[/tex] = Mass of ice × 334 J/g = 16000 J
Mass of ice melted by the lead = 16000 J/334 (J/g) ≈ 47.9 g
Mass of ice melted by the lead ≈ 47.9 g
Therefore, mass of ice melted by the iron, approximately 132.9 g, is more than mass of ice melted by the lead, approximately 47.9 g.
the density of sulfuric acid is 1.84 g/mL. the mass of the sample is 25.0 what is the volume of L?
Answers
Answer:
Volume=46mL
Explanation:
density=1.84g/mL
mass=25.0g
volume=1.84×25
volume=46mL
How many atoms are in 32.84 g of B?
Answers
The ______,
who loved knowledge and built schools to help their people learn, were
foundational in the study of science.
A.French
B.Chinese
C.Romans
D.Greeks
Answers
what is the molecular mass of Au
Answers
Answer:
196.96657 u
Explanation:
how does the latitude affect the temperature
Answers
Answer:
Latitude is one of the main factors affecting temperature. Latitude is the measurement of the distance of a location on the Earth from the equator. ... At the Equator, the Sun's rays strike the Earth at a right angle, which makes the heat more intense and concentrated over a small area.
Explanation:
As latitude increases, the temperature falls, and vice versa. Generally, around the world, it gets warmer towards the equator and cooler towards the poles.
are all metals magnetic?
Answers
✅Magnetic materials are always made of metal, but not all metals are magnetic. Iron is magnetic, so any metal with iron in it will be attracted to a magnet. Steel contains iron, so a steel paperclip will be attracted to a magnet too. Most other metals, for example aluminium, copper and gold, are NOT magnetic.
IamSugarBee
What codes for the characteristics of an organism?
A None of the above
B) DNA in cells
The brain
D) The skin of an organism.
Answers
1. Which of the following substances are elements? Explain
how you determined your answer.
(a) bronze
(b) tin
(C) chromium
(d) solder
(e) propane
(f) arsenic
(g) nickel
Answers
How did I determine that answer? I looked at a periodic table.
Tin - Sn
Chromium - Cr
Arsenic - As
Nickel - Ni
Bronze is a copper alloy, not an element.
Solder is an alloy made of led or tin (sometimes brass or silver)
Propane is Alkane made up of Carbon and Hydrogen
Substances that can be regarded as elements are;
Tin
Chromium
Arsenic
Nickel .
Chemical elements can be regarded as substance that are required to form compounds in chemical reactions.The elements in this question are Tin ,Chromium ,Arsenic ,Nickel, i can know this by checking the periodic table which gives the arrangements of all elements.Solder, Bronze can be regarded as alloy because it contains more than one metal element. Propane is a compound.Therefore, periodic table contains all the elements.
Learn more at:
https://brainly.com/question/18757696?referrer=searchResults
Mercury has a density of 13.6 g/mL. What is the volume occupied by 112.0 grams of mercury?
Answers
Answer:
The answer is 8.24 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 112 g
density of mercury = 13.6 g/mL
We have
[tex]volume = \frac{112}{13.6} \\ = 8.23529411...[/tex]
We have the final answer as
8.24 mLHope this helps you
What volume of a popsicle will have a mass of 45g if the density is 10g/cm3 I NEED THE ANSWER ASAP
Answers
Answer:
The answer is 4.50 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass = 45 g
density = 10 g/cm³
We have
[tex]volume = \frac{45}{10} = \frac{9}{2} \\ [/tex]
We have the final answer as
4.50 cm³Hope this helps you
Some household cleaners come in concentrations stronger than necessary for basic cleaning jobs. Jeremy followed the instructions on a cleaning bottle and mixed enough cleaner with 4.0 L of water to form a 1.0 M cleaning solution. After testing his cleaning solution, he decided he should double to concentration for a tough stain. Jeremy added the same amount of cleaner and then added another 4.0 L of water to his bucket. Did Jeremy succeed in making a more concentrated solution? Explain why or why not. *
Answers
Answer:
no he just repeated the steps and made more of the same cleaner my guy
Explanation:
A student designed an experiment to determine the effect of increasing the temperature of the solvent on the amount of
solute that could be dissolved. Which of the following would be the dependent variable?
A Temperature of the solute
Answers
Answer: A Temperature of the solute
Explanation:
How does the Nervous System control the
Circulatory System?
Answers
Neurotic cells of the nervous system send signals to the circulatory system for it to preform its proper functions. Especially since the nervous system works with sensory, I think this has something to do with wound and blood aiding but I could be wrong.
Sorry I couldn’t be a better help, but I hope this kinda gives you an idea
calcium electron configuration
Answers
Answer:
1s2 2s2 2p6 3s2 3p6 4s2
shorthand: [Ar] 4s2
Explanation:
the end number values are exponents, so 1s^2
Coastal regions are often affected by abrasion what process would cause increased abrasion along a coastal region ?explain
Answers
Answer:
Coastal regions are often affected by abrasion. What process would cause increased abrasion along a costalregion? Abrasion is physical weathering caused by water, wind and gravity. The coastal regions areaffected by abrasion due to large volumes of water and increasedwinds.
Answer:
Hydraulic action of waves
Explanation: Coastal abrasion occurs as breaking ocean waves containing a sand and larger fragments erode the shoreline or headland. The hydraulic action of waves contributes heavily.
A pharmaceutical company states in advertisements that their new ScarX Cream is guaranteed to erase scars in one month.
The company based their claims on a study done by the company's dermatologists.
The study showed that 84 percent of users said the sizes of their scars were reduced after using the product for 50 days. Do the study results support the company's claims?
Answers
Answer:d
Explanation:
the results indicated
Answer:
No, the results indicated that the scars were reduced, not erased.
Explanation:
beacuse i got it correct
what does a fusion reaction always create?
Answers
Answer:
In fusion reactions, two light atomic nuclei fuse together to form a heavier nucleus and release a large amount of energy.
Alt. Answer:
Fusion is the process that powers the sun and the stars. It is the reaction in which two atoms of hydrogen combine together, or fuse, to form an atom of helium. In the process some of the mass of the hydrogen is converted into energy.
Explanation:
lol the internet
Answer:
A fusion reaction creates two light atomic nuclei that fuse together to form heavier nucleaus and realease a large amount of energy.
Explanation:
The element calcium forms the ion Ca2+. How many protons, Neutrons, and electrons does it have?
Answers
Answer:
18 electrons
20 neutrons
20 protons
Explanation:
During which change of state would the volume of a substance increase the most?
deposition
melting
vaporization
sublimation
Answers
Answer:
Correct option d = Sublimation
Explanation:
We know that gases occupy more volume as compared to the solid and liquid. Gases occupy all the available space.
In given option option D is correct because,
Sublimation is the process in which solid is directly converted into the gaseous phase without passing through liquid phase. So when substances under goes sublimation they are converted into gaseous form and occupy more space.
Oher options are incorrect because,
Deposition involve the conversion of gas into solid. Thus volume decreased. This option is incorrect.
Option B is also incorrect because,
Melting involve the conversion of solid into liquid. Volume increased as compared to solid state but not as much like in case of gases.
Option C is also incorrect because,
Vaporization involve the conversion of liquid into gaseous form. Volume also increase in this case but the volume increase in case of sublimation is higher than in case of vaporization that's why this is also incorrect.
Answer:
The correct answer is D. Sublimation
Explanation:
Edge 2020
View the model of the rover Curiosity.
Which classification best applies to this model?
very large
very small
very mathematical
very complex
Answers
Answer: very complex .
Explanation:
Answer:
very complex
Explanation: just took the test
(PLS HELP WORTH 50 POINTS)
Click or tap the storage container to transfer the displaced water to the 500 mL graduated cylinders, and determine
how much water was displaced by the football. Record this volume in Table B.
Answers
Answer:
there would be 4,300mL of diplaced water
for this all your expected to do is to add all of the volume in the containers together.
pls helppp
Calculate the frequency for a wavelength of 485 nm.
Answers
Answer:
299792458/(485x10^-9)=6.181x10^14Hz = 618.1THz
Frequency x Wavelength = Speed of Light
therefore
Speed of light / Wavelength = Frequency
how would it affect your results if you use a wet Erlenmeyer flask instead of a dry one when transferring your acid solution from a volumetric pipette? pls someone answer pls
Answers
Explanation:
Your results would be effected because there is a possibility that the water and chemical substance added into the flask will combine, possibly creating a reaction, either making the solution stronger or weaker, or possibly just messing up your experiment in one go.
For example:
If I paint a picture, and I have a cup that I use in order to put paint in, but the cup is wet and I put my paint in it, my paint will become more liquefied due to the fact water has been added to it, messing the paint up.
why do you think the experimenter conducted this experiment in a lab rather than in the natural world, where this phenomenon was first observed?
Answers
Answer:
The experimenter observed this experiment in a lab rather than natural world because it might be dangerous to the atmosphere if he does the experiment in the natural world and it was still an hypothesis so that's why he did it in the lab.
6) Andy has left a bucket of smelly cheese porridge to cool down in the
Kitchen
a) Claire and Dagmar are sitting in the next room. Explain how the smell spreads to Claire's nose by diffusion.
hello!can anyone help?
Answers
Explanation:
the air particales are always moving so it also takes the smell of the chesse with it and sreads everywhere in the house.
Describe how the composition of gases changes as you travel up through Earth’s atmosphere
Answers
Explanation:
The composition of the gases never changes until the mesosphere and the thermosphere. -carbon dioxide, oxygen, and methane are only found in the troposphere. -Permanent gases stay the same until you reach the thermosphere.
1. CuCO^3------>CuO+CO^2 (g)
Word equation
State the characteristics or indications occurring in the above reaction
Answers
Answer:
A ----> A+B
Explanation:
CuCO3 is undergoing a decomposition reaction into the products copper(II) oxide and carbon dioxide gas.
13. Based on the type of elements in the compound, are there ionic or covalent?
a. KCI
b. NO2
C. Cao
d AIF3
e. HF
f. NBr3
g. MgBr2
Answers
Answer:
c
Explanation:
Answer:
《●《HOPE IT HELPS YOU 》●》
ANS--> (C)