Answer:
199.7mL
Explanation:
Using Charles law equation as follows:
V1/T1 = V2/T2
Where;
V1 = initial volume (mL)
T1 = initial temperature (°F)
V2 = final volume (mL)
T2 = final temperature (°F)
According to the information provided in this question, V1 = 135mL, V2 = ?, T1 = 67.6°F, T2 = 100°F
Using V1/T1 = V2/T2
135/67.6 = V2/100
Cross multiply
135 × 100 = 67.6 × V2
13500 = 67.6V2
V2 = 13500/67.6
V2 = 199.704
The new volume in the air in the helium ballon is 199.7mL.
Answer:
199.7mlexplain;
math
eek helpppp ill give brainliestt
Answer:
S=Solid
Mg=Solid
B=Solid
Ca=Solid
Ar=Gas
H=Gas
Cs=Solid
Zn=Solid
Br=Liquid
Sb=Solid
N=Gas
Hg=Liquid
Explanation:
If 2.32 moles of iron react with excess oxygen gas, how many moles of Fe2O3 can be produced?
Moles Fe₂O₃ produced : 1.16 moles
Further explanationGiven
2.32 moles of iron
Required
moles of Fe2O3
Solution
The reaction coefficient in a chemical equation shows the mole ratio of the reacting compounds (reactants and products)
Reaction
4 Fe + 3 O₂ ⇒ 2 Fe₂O₃
From the equation, mol ratio Fe : mol Fe₂O₃ = 4 : 2, so mol Fe₂O₃ :
= 2/4 x mol Fe
= 2/4 x 2.32
= 1.16 moles
1. Which of the statements is correct?
A. Only asteroids collide with Earth.
B. Cornets are ball of ice, dust, and metal.
C. Meteoroids are streak of light produced when comet enters Earth's
atmosphere.
D. Only asteroids can be found in the solar system.
2. What do you call the fragments or debris that resulted from the collision of
asteroids or comets?
A. meteors
B. meteoroids
C. Oort Cloud
D. Kuiper Belt
3. What is the bright glow around the "head" of a comet?
A. coma
B. crown
C. halo
D. ring
4. What is the name of the famous comet that can be seen from Earth every 75 to
76 years?
A. Hale Boop
B. Comet Halley
C. Comet Tempel 1
D. Shoemaker Levy-9
5. What is the correct term for a “shooting star"?
A. asteroid
B. comet
C. falling star
D, meteor
6. What is an Asteroid Belt?
A. It has rocks crossing the Sun, Mars, and Jupiter.
B. It has rocks crossing the Sun, Jupiter, and Uranus.
C. It is an area between Mars and Jupiter where most asteroids are found.
D. It has rocks between the Earth and Jupiter where most asteroids are found.
Answer:
down
Explanation:
Answer
(a) F
Pole Star is a star in the galaxy and hence not a part of the solar system.
(b) T
Mercury is the smallest planet in the solar system and Jupiter is the largest planet in the solar system.
(c) T
Uranus is the farthest planet to the sun in the solar system and Mercury is the closest planet to the earth in the solar system.
(d) T
INSAT or Indian National Satellite System is a series of artificial Indian satellites used for telecommunications, meteorology and search and rescue operations.
(e) F
There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Note the pluto is considered as a dwarf planet.
(f) F
Orion can be seen with naked eyes. It is one of the most magnificent constellations in the sky. It has seven or eight bright stars. Orion is also called the Hunter
In this exercise, we have to use our knowledge of astronomy to identify the correct alternatives, so we find that:
1)C
2)B
3)A
4)B
5)D
6)C
Then, based on astronomy knowledge, we can identify that the true alternatives correspond to:
1)A meteor happen a streak of light above bring into being by a meteor superlative through Earth's general feeling or mood.
2)Meteoroids exist lumps of rock or iron that revolution the brightest star, just as celestial body orbiting a star, asteroids, and comets act.
3)A coma happen the fuzzy-anticipate glow that maybe visualize situated on sides the head of a comet.
4)Halley's Comet, that happen 8 kilometres (5 miles) expansive and 16 km long, travels around the Sun each 75 to 76 age in an lengthened circuit.
5)Shooting stars exist existent what astronomers call meteors. Most meteors upset fashionable the gases around the earth before they reach the ground.
6)The celestial body orbiting a star belt happen a torus-form domain in the Solar System, situated about middle from two points the orbits of the celestial body orbiting a star Jupiter and Mars.
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How could the strength of an electromagnet be increased?
by reducing the length of the core (nail) of the electromagnet
by using the rubber material as the core for the electromagnet
by decreasing the amount batteries used for the electromagnet
by increasing the number of coils in the wires of the electromagnet.
I had this question on a test in K12
The answer is By increasing the number of coils in the wires of the electromagnet.
increasing coil wires is correct, like the other person answered.
pls watch episode 17 of Eureka Videos
https://youtu.be/aVIT3R9kx5s and answer the question
What does heat energy do to the molecules in a solid lattice-work pattern?
Answer:
The molecules are held closely together in a regular pattern called a lattice. If the ice is heated, the energy of the molecules increases. ... This is why liquid water is able to flow: the molecules have greater freedom to move than they had in the solid lattice.
Explanation:
I hope this helps and pls mark me brainliest :)
Energy exists in different forms. Which of the following forms of energy best describes the energy stored
in food?
A. electromagnetic energy
B. mechanical energy
C. sound energy
D. chemical energy
Answer:
D. chemical energy
Explanation:
Food contains chemical energy as chemical energy is stored in bonds.
is chex mix an example of a pure substance or mixture?
An illustration of a mixture is Chex Mix. It is made out of a variety of blended ingredients, including Chex cereal, pretzels, almonds, and spices.
A mixture is a grouping of two or more compounds that are physically mixed but are not chemically bound in chemistry. Each component of the combination keeps its unique characteristics and can be physically separated from it using techniques like filtration or distillation. Both homogeneous and heterogeneous mixtures exist. Homogeneous mixtures, like seawater, have a consistent composition throughout, whereas heterogeneous combinations, like oil and water, have separate phases and an unequal distribution. An illustration of a mixture is Chex Mix.
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Plz answer question 9 in the picture... with an explanation
Answer:
b)
Explanation:
A substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same atomic number, that is, each atom has the same number of protons in its nucleus as all other atoms of that element.
Answer:
Figure B show element
Explanation:
Element is made up of same type of atoms and in figure b only one type of atom is present
Name the molecule when potassium reacts with chlorine?
Answer: Potassium Chloride
Explanation:
What are the two factors that determine the gravitational force
between any two objects?
Answer:
Gravity is your answer
Explanation:
Gravity hopes this helps
I need help with this!
Explanation:
From top to bottom
transfer
substance
cooler
good
energy
metal
insulator
wood
heat
particles
particles
hotter
gases
convection
energy
b
Lau
C)
Why is sulphuric acid kept in the glass bottle? in fire extinguisher
Answer:
A glass bottle kept inside the container has sulphuric acid in it. When the knob of the extinguisher is pressed, the bottle breaks. The acid comes in contact with sodium carbonate and carbon dioxide is produced. The carbon dioxide comes out through the nozzle which is directed towards the fire.
If 1 g of radium-226 has an activity of 1 curie, what is the activity of 2 g of radium-226? 1 curie 2 curies 4 curies 10 curies
Answer:
2 curies
Explanation:
This is actually pretty easy to explain.
The Radium-226 which is an isotope of the radium, have an activity of curie. This is basically used in radioactivity of certain elements.
As in both cases we have Radium -226 and we are only varying the mass of the Radium, then, we can just do a rule of 3 to calculate this:
1 g Ra-226 --------> 1 Curie
2 g Ra-226 --------> X Curie
Solving for X:
X = 2 g * 1 Curie / 1 g
X = 2 Curies.You can also see this by taking 2 grams of Ra per separate. On one side you have 1 g of Ra-226 and on the other side, you have another 1 g of Ra-226. Both have 1 Cury of activity. If you put both on the same side, you will have 1 Cury of 1 isotope plus 1 cury of the other isotope, final result? 2 curies.
Hope this helps
Calculate the mass (in g) of solute needed to prepare a solution with the given concentration and volume.
Sea water has a concentration of approximately 0.60 M sodium chloride. How much
sodium chloride is dissolved in 1.00 L of solution?
Coke has a concentration of 0.342 M. What mass of sugar (in g) is dissolved in a 2-L
bottle of coke?
What volume of concentrated nitric acid (15.8 M) is needed to prepare 4.0 L of a 2.0 M solution?
What volume of 9.0 M copper (II) sulfate stock solution is needed to prepare 3.0 L of a 5.0 M
solution?
Answer:
1. 35g NaCl.
2. 234g sugar.
3. 0.506L of concentrated nitric acid are needed.
4. 1.67L of 9.0M copper (II) sulfate are needed
Explanation:
Molarity is defined as the ratio between moles of solute and the volume of the solution.
1. 1.00L * (0.60mol / L) = 0.60 moles NaCl are dissolved
To convert moles to mass we must use its molar mass:
0.60mol NaCl * (58.44g/mol) =
35g NaCl
2. 2L * (0.342mol / L) = 0.684 moles Sugar = moles sucrose
0.684 mol * (342.30g / mol) = 234g sugar
3. 4L of a 2.0M are:
4L * (2.0mol/L) = 8moles
8mol * (1L / 15.8mol) = 0.506L of concentrated nitric acid are needed
4. 3.0L * (5.0 mol / L) = 15.0 moles copper (II) sulfate.
15.0mol * (1L / 9.0mol) = 1.67L of 9.0M copper (II) sulfate are needed
a piece of ribbon is shared equally among 5 girls what fraction of the ribbon does each girl get, 20 points!!!!
Answer:
5 piece of ribbon
Explanation:
Because ther are a piece of ribbon is shade
Why do you think that tsunamis occur most commonly in the Pacific Ocean?
a heliox tank contains 32% helium and 68% oxygen. the total pressure in the tank is 395 kPa. What is the partial pressure of oxygen in the tank? Make sure to include the unit in the answer.
Answer: The partial pressure of oxygen in the tank is 82.95 kPa.
Explanation:
According to Raoult's law, the partial pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure.
[tex]p_{O_2}=x_{O_2}\times P[/tex]
where,
[tex]p_{O_2}[/tex] = partial pressure of oxygen
[tex]x_{O_2}[/tex] = mole fraction of oxygen
[tex]P[/tex] = Total pressure
[tex]x_{O_2}=\frac{n_{O_2}}{n_{O_2}+n_{He}}[/tex],
where [tex]n_{O_2}[/tex] = moles of oxygen =[tex]\frac{68g}{32g/mol}=2.125[/tex]
[tex]n_{He}[/tex] = moles of Helium =[tex]\frac{32g}{4g/mol}=8[/tex]
[tex]x_{O_2}=\frac{2.125}{2.125+8}=0.210[/tex]
[tex]p_{O_2}=0.210\times 395kPa=82.95kPa[/tex]
Thus the partial pressure of oxygen in the tank is 82.95 kPa.
In a fractionating column, what process is caused by heating?
Answer:
During the fractional distillation of crude oil: heated crude oil enters a tall fractionating column , which is hot at the bottom and gets cooler towards the top. vapours from the oil rise through the column. vapours condense when they become cool enough.
Hope it helps you :)
The fractionating column's crystal clear glass beads provide such a vast surface area for heated vapors to cool and condensed continuously.
The fractionating column is inserted into the mouth of the distillation flask, which contains the saturated solution to be separated.
Heated crude oil is pumped into a tall fractionating column that is heated at the bottom and cools as it rises.
The oil fumes ascend through the column. When vapors cool down sufficiently, they condense. Various heights are used to lead liquids out of the columns.
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Humans depend on ecosystems for ecosystem services and
resources. For example, this river ecosystem provides water, fish,
and a place to swim. The forest ecosystem provides wood, shade,
and erosion control. Choose a resource and describe the possible
effects of its use on society and on ecosystems throughout its life
cycle.
Explanation:
ok, forest ecosystem always recycle its resources;
dead animals are always returned to the ground, providing fertility of trees & other vegetation for the animals that consume its harvest...this ecosystem provides natural remedies for human ailments, rich soil provides farming, and re using of such, as long as it is not over harvested. The Indians that live there have vast knowledge of their surroundings...
what happened after you add 1 dose of antibiotics to the bacteria
Answer:
Since there's only 1 hour before your next dose, you skip the missed ... It happens when bacteria adapt to withstand one or more antibiotics.
Explanation:
An object with a mass of 4.0 kg has a force of 12.0 newtons applied to it. What is the resultant acceleration of the object?
Help me?? :(
Answer:
3m/s²
Explanation:
Force applied to an object can be calculated thus;
F = ma
Where;
F = force applied (Newtons)
m = mass of substance (kg)
a = acceleration (m/s²)
According to the information provided in this question, F = 12.0 newtons, m = 4.0 kg, a = ?
Derived from F = m.a
We have; a = F/m
a = 12/4
a = 3
The resultant acceleration of the object is 3m/s².
what are all the possible chemical formulas for-
1. cadmium and fluorine
2. vanadium and arsenic
3. rhenium and oxygen
4. lead and sulfur
5.titanium and nitrogen
6.palladium and chlorine
7.iridium and carbon
8.chromium and phosphorus
Answer:
number 7 or 3,5
Explanation:
sana po makatulong po sa inyo
Identify the products in the reaction HCI + NaOH → NaCl + H20.
A. HCI, NaOH, NaCl, and H2O
B. HCl and NaOH
C. NaCl and H20
D. NaOH and H20
The products in the reaction HCI + NaOH → NaCl + H20, are C. NaCl and H20.
How are these the products ?The reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is a neutralization reaction, which means that it produces a salt and water. In this case, the salt is sodium chloride (NaCl) and the water is H2O.
The other options are not correct because they do not include all of the products of the reaction. Option (A) includes HCl and NaOH, but it does not include H2O. Option (B) only includes HCl and NaOH. Option (D) only includes NaOH and H2O.
In conclusion, option C is correct.
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why are the Alkali Metals the first row of the periodic table?
Explanation:
All atoms naturally want to have a completely full outermost shell of electrons.Howevee, elements in that first column of the periodic table all have one electron in their outermost shell. ..."since the alkali metals only have one valence electron,they typically achieve this state by giving up that electron.
I hope it's helpful!
Someone help me to these please i dont have much time
Answer:
2
Explanation:
it is #2. the answer is 2
Answer:
Hope this will help you.... Take care
Please help quickly! i will mark brainliest
Answer:
Energy of the Reactant: increases
Energy of the product: not at all
Rate of reaction: increases
Enthalpy: not at all
Activation energy: decreases
Explanation:
Catalyst is a substance that increases the rate of reaction than normal to form a product.
Catalyst affect differently to different factors of reaction. A catalyst is meant to increase rate of reaction by lowering the activation energy, so that collision between reactant increase and that passes the energy barrier to form the product faster.
Catalyst has no effect on Enthalpy as change in enthalpy only depends on the chemical compositions of the reactants and products.
Catalyst also increases energy of reactant so that they can collide faster than before and do not affect the energy of product at all.
Hence, the correct answer is:
Energy of the Reactant: increases
Energy of the product: not at all
Rate of reaction: increases
Enthalpy: not at all
Activation energy: decreases
What is a reactant?
A- Solid particles that have been separated from a solution
B- A substance that has the ability to be dissolved by a solvent
C- A mixture in which a solid and a liquid or two liquids are mixed occurs
D- The substance present before a chemical reaction occurs
Answer:
it is D
Explanation:
because it is a substance that participants in a chemical reaction.
What results when two waves that are completely out of phase meet?
Answer:
Explanation:Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.
If two waves that are completely out phase if meet they results in destructive interference. Hence, their intensities decreases for the resultant wave.
What is interference ?A wave of greater, lower, or the same amplitude is created when two waves merge through interference by combining their displacements at all points in space and time.
The interaction of waves that are coherent or correlated with one another, either because they originate from the same source or because their frequencies are similar or almost identical, leads to both constructive and destructive interference.
All sorts of waves, including light, radio, acoustic, surface water waves, gravity waves, and matter waves, can exhibit interference effects. In constructive interference, the waves are in single phase forms a resultant wave with higher amplitude.
When waves from out of phase meets, the resultant wave will have an amplitude less than the individual amplitudes.
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(NH4)3P is it Ionic or Molecular??
Answer: It is molecular
Explanation: The reason it is molecular is because it has no ions in the formula it only has the molecular mass which is the reason why it is in fact molecular
H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4
How many grams of NaNO2 do you need in order to make 24.14714 g of Na2SO4?
(use 5 sig figs)
*btw the answer 23.459 is wrong
23.458 g
Further explanationGiven
Reaction
H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4
24.14714 g of Na2SO4
Required
mass of NaNO2
Solution
mol Na2SO4 :
= 24.14714 : 142,04 g/mol
= 0.17
From the equation, mol NaNO2 :
= 2/1 x mol Na2SO4
= 2/1 x 0.17
= 0.34
Mass NaNO2 :
= 0.34 x 68,9953 g/mol
= 23.458 g