Answer:
c. 39
Explanation:
You round the number 39.098 to make it easier. Since you can't round it up to forty because the number after the 9 in-front of the decimal is a over i is unable to be rounded up
Help me real quick !!
Answer:
yellow
if not sorry that's though the best answer
Explanation:
3HCl(aq) + Al(OH)3(aq) = AIC13(aq) + 3H2O(1)
Based on the reaction shown above, what volume of 0.246 M
HCl is needed to titrate a 200 mL of 0.048 M Al(OH)3 solution?
mL
Answer:
117.07 ml
Explanation:
Right on ck-12
The volume of 0.246 M HCl needed to titrate 200 mL of 0.048 M Al(OH)₃ solution is 117 mL
Balanced equation3HCl + Al(OH)₃ —> AlCl₃ + 3H₂O
From the balanced equation above,
The mole ratio of the acid, HCl (nA) = 3The mole ratio of the base, Al(OH)₃ (nB) = 1How to determine the volume of HCl Molarity of acid, HCl (Ma) = 0.246 MMolarity of base, Al(OH)₃ (Mb) = 0.048 MVolume of base, Al(OH)₃ (Vb) = 200 mLVolume of acid, HCl (Va) =?MaVa / MbVb = nA / nB
(0.246 × Va) / (0.048 × 200) = 3
(0.246 × Va) / 9.6 = 3
Cross multiply
0.246 × Va = 9.6 × 3
Divide both side by 0.246
Va = (9.6 × 3) / 0.246
Va = 117 mL
Learn more about titration:
https://brainly.com/question/14356286
#SPJ2
How many atoms of hydrogen appear to be on the reactant side?
Answer:
Two
Explanation:
In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products.
Answer: 2 it has two
Explanation:
Which equation is balanced?
Al+3O2→Al2O3
2Al+3F2→2AlF3
Na+F2→2NaF
Mg+2O2→2MgO
Answer:
3rd one
Explanation:
I just took the test and got 100%
Answer:
2nd one
Explanation:
Took the test
What is a primary role of decomposers in an ecosystem?
Select one:
O a. They eliminate matter by taking nitrogen from the ecosystem.
O b. They eliminate matter by taking phosphorus from the ecosystem.
O c. They cycle matter by returning carbon and other matter to the ecosystem.
O d. They cycle matter by returning oxygen and other matter to the ecosystem.
Answer:
c
Explanation:
they use oxygen in their breakdown process and at the end of the breakdown they return nutrients like carbon dioxide and nitrogen back to the ecosystem.
Answer:
c. They cycle matter by returning carbon and other matter to the ecosystem.
Which of these do plants need for photosynthesis to occur?
OA.
glucose and water
ов.
glucose and carbon dioxide
OC.
water and carbon dioxide
OD.
water and oxygen
Answer:
OC. water and carbon dioxide
Explanation:
The equation for photosynthesis is Carbon dioxide plus water plus light energy yields sugar (glucose) and oxygen
Answer:
Water and carbon dioxide
Explanation:
We learned this in Grade 2.
What family has 4 valence electrons?
Answer:carbon group
Explanation:
Why must the final product of a decay series be stable?
a. The daughter isotope of any radioactive decay is stable.
b. No decay chain can emit more than two particles.
c. Each decay results in a net loss of particles.
d. If the daughter isotope is unstable, it will decay.
Answer:
I think its d
Explanation:
Because isotopes decay due to being unstable so if the daughter isotope is unstable it will just decay till it produces a stable isotope
Answer:
d. If the daughter isotope is unstable, it will decay
Explanation:
got it correct on quiz
how r u? do u like anime?
Answer:
good and yes
Explanation:
Which of the following is NOT a chemical change?
A. Tarnishing silver
B. Melting butter
C. Digesting food
D. Baking a cake
Answer:
Melting butter
Explanation:
You can reverse the change of butter back to its original state but you can never reverse the rest back to there original state
When an atom gains three electrons, it becomes
3.2 g of a gas at occupy the same volume as 0.6266 g of CH4 at 17°C at constant pressure
Find the molecular mass of the gas.
Assuming gas temperature = 25, 3.2 g of a gas at 25°C occupy the same volume as 0.6266 g of CH4 at 17°C at constant pressure
The molecular mass of the gas : 842.1 g/mol
Find the molecular mass of the gas.Further explanationGiven
3.2 g of gas
0.6266 g of CH4
Required
the molecular mass of the gas
Solution
Because V, P, and R are the same, from ideal gas law :
PV=nRT
n₁T₁=n₂T₂
n₂=moles CH₄= 0.6266 : 16 g/mol = 0.0392
T₁=25+273=298 K
T₂=17+273=290 K
mol of gas :
[tex]\tt n_1=\dfrac{n_2.T_2}{T_1}=\dfrac{0.0392\times 290}{298}=0.038[/tex]
molecular mass :
[tex]\tt M=\dfrac{3.2}{0.038}=842.1[/tex]
According to the cup wall diagrams, why does the double wall vacuum
sealed cup outperform the other two cups
Because the particles are moving so fast in a vacuum that
they are able to pass through the walls and transfer more
kinetic energy to the liquid in the cup.
B
The vacuum allows for the all of the particles to pack in tightly
therefore nothing can pass through.
There is little to no transfer of kinetic energy between the
walls of the cups because there are no particles in a vacuum.
And since there is little to no transfer of kinetic energy there
is little to no transfer of temperature. Therefore the liquid
inside stays warmer/colder longer.
The particles in a vacuum do not move at all. Therefore there
is no kinetic energy and nothing can be transferred.
Answer:
i do not now
Explanation:
Interactivity: Hot on the Inside
Which statement accurately describes radioactive dating?
O Geologists use only one type of radioactive dating.
O Geologists compare parent and daughter elements to determine rock type.
O Geologists will measure how stable multiple parent elements can decay into multiple daughter elements.
Geologist compare the observed abundance of naturally occurring radioactive isotopes and their decay products
using decay rates.
Answer:
its d and can i get brainliest plz:)
Explanation:
The statement accurately describes radioactive dating Geologist compare the observed abundance of naturally occurring radioactive isotopes and their decay products using decay rates.
What is radioactive substance?A substance in which a unstable nuclei is contained is called as radioactive substance. Radioactive decay is a process in which an unstable nucleus loses energy by the process of radiation. There is a random process that happens in radioactive substances that is radioactivity. The type of product produced after radioactive emission depends on the type of radioactive decay.
Radioactive decay can be of different types like alpha decay, gamma decay or beta decay. Alpha particles, beta particles or gamma particle are emitted in these.
Given options are-
Geologists use only one type of radioactive dating.
Geologists compare parent and daughter elements to determine rock type.
Geologists will measure how stable multiple parent elements can decay into multiple daughter elements.
Geologist compare the observed abundance of naturally occurring radioactive isotopes and their decay products using decay rates.
Therefore, The statement accurately describes radioactive dating Geologist compare the observed abundance of naturally occurring radioactive isotopes and their decay products using decay rates.
To learn more about radioactivity click:
https://brainly.com/question/1770619
#SPJ7
What will happen to the gas molecules in the container as thermal energy is applied?
a-The movement, kinetic energy, and pressure of the molecules will increase.
b-The movement, kinetic energy, and pressure of the molecules will decrease.
c-The movement, kinetic energy, and pressure of the molecules will stay the same.
d-The movement of the molecules will increase, but the kinetic energy and pressure of the molecules will stay the same.
PLZ HELP I HAVE A BENCHMARK TEST!!!!
Decreased because we all know what happen if we put it with thermal energy
When thermal energy is supplied to gas molecules in the container, the movement, kinetic energy, and pressure of the molecules will increase.
Gas molecules are in constant random motion. They collide frequently which other and the walls of the container.
When thermal energy is applied, the gases move faster (acquire higher velocity). The kinetic energy also increases accordingly.
As a result of the increase in thermal energy, gas molecules collide with the walls of the container more frequently (pressure increases).
Learn more: https://brainly.com/question/16615446
Which statement best describes physical properties?
A. Physical properties behave identically for all matter under the same conditions.
B. Physical properties can be observed without changing the identity of a substance. C. Physical properties are observed by seeing how a substance reacts with other substances.
D. Physical properties cause atoms and molecules to change structure when substances are mixed.
Answer:B
Explanation:
Which organism is able to form organized patterns of behavior through the process of integration because it has ganglia?
-mouse
-shark
-grasshopper
-flatworm
Answer:
flatworm
Explanation:
a student wrote The Following hypothesis if more salt is added to a hypothesis
Answer:
i love adding salt to my hypothesis
Explanation:
Which of the following best describes a galaxy?
A. a particle of debris in the solar system that does not act as a satellite of any planet.
B.a visible body of liquid or frozen crystal droplets suspended above a planetary surface
C. a massive system of stars, gas, dust, and dark matter bound together by gravity
D.The visible path of a meteoroid as it enters Earth's atmosphere
Need help ASAP
Answer: the anser is a
Explanation:
The galaxy is a massive system of stars, gas, dust, and dark matter bound together by gravity. Option C is correct.
What is gravity?The galaxy is a force of attraction that attracts the particles or abject towards themselves and it gets double the mass of the object and has the capacity to bound the objects.
In a galaxy all are revolving around the orbits and satellites due to gravity and all these stars dust etc are also part of the universe which is bounded by The galaxy is a massive system of stars, gas, dust, and dark matter bound together by gravity
Therefore, Option C is correct.The galaxy is a massive system of stars, gas, dust, and dark matter bound together by gravity
Learn more about gravity, here:
https://brainly.com/question/4014727
#SPJ6
From the formula, write the correct name for the ionic compound.
MgBr₂
KCl
Al₂S₃
BeCl₂
MgCl₂
GaN
CaO
BaO
AgBr
NaF
SrS
LiCl
AlP
CsI
From the Ionic compounds name, write the correct formula.
potassium chloride
magnesium bromide
aluminum sulfide
magnesium phosphide
calcium oxide
barium oxide
Answer: mgbr2 magnisum bromide
KCI potassium chloride
AI2S3 aluminum sulfide
MG3p2 magnisum phosphide
CaO calcium oxide
BaO barium oxide
Explanation:I did this one time
The compound Mg(OH)2 is incorrectly named magnesium dihydroxide.
Explain the errors)
Answer:
Mg(OH)2 is an inorganic compound and it's a base.
because it has a hydroxide ion and its name is magnesium hydroxide
When elements form compounds, the elements
keep their original properties.
always change their physical state
react to form a new substance with new properties
combine in a random fashion
14
Answer: it's always change there physical state
Explanation:
What type of bond will form between atoms of calcium (Ca) and fluorine (F)?
The Periodic Table
O A. Metallic
O B. Covalent
O C. Hydrogen
D. Ionic
Answer:
D.Ionic bond
Explanation:
Calcium is a cation. Fluorine is an anion. Calcium loses two electrons to bond with two fluorine atoms to form CaF2 ( Calcium Fluoride)
After studying weather, Beto bought a simple weather station and put it up in his yard. He was especially interested in wind and how it forms around Earth. Choose the correct words or phrases to complete the sentences.
Incomplete question. The remaining part reads;
Choose the correct words or phrases to complete the sentences.
Global winds occur due to
1. Choose...
a. solar currents
b. convection currents
c. sea breezes
d. uneven heating
over a large area and this forms
2. Choose...
a. solar currents
b. convection currents
c. sea breezes
d. uneven heating
caused by cool and warm air.
Answer:
1. d. uneven heating
2. b. convection currents
Explanation:
1. What Beto should know is that as the earth moves and rotates around the sun, some parts of the Earth receive more sunlight and others less, which then leads to uneven heating over a large area of the earth.
2. This uneven heat then forms a convection current containing varying patterns of air spreading to various parts of the globe.
Is it possible to have more atoms on the product side of a chemical reaction than there are on the reactant side? Explain why or why not.
Answer:
No, you cannot.
Explanation:
Due to the Law of Conservation of Energy all chemical equations have to be balcned. The Law of Conservation of energy states that matter cannot be neither created nor destroyed. By having more atoms on either side, you are breaking this law.
what is the correct lewis dot diagram for KCL
Which of the following explains a difference between genes and chromosomes
Answer:
Dude I need the answers so i can help you!
Explanation:
Give me the answers plz
Which part of the ocean has the lowest temperatures and highest salinity?
Answer:
The north atlantic contains the warmest and saltiest water of the major oceans, the southern ocean is the coldest, the north pacific has the lowest average salinity. This density signature is locked into the water parcel when it sinks
Explanation:
i think
The daily rotation of Earth causes ______ and _____. *
High Tide
Low Tides
Day
Night
Spring Tide
Neap Tide
Really need this!! for a big grade! thank you guys ~ please help!
Answer:
Day and Night
Explanation:
Google :)
