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Related Questions
is magnesium a pure substance????
Answers
a beaker contains 0.250 l of liquid. a student pours 0.00385 L of liquid out of the beaker. How much liquid remains in the beaker? choose the value reported with the correct number of significant figures
Answers
Answer:
The volume of the liquid remaining in the beaker is 0.24615 l
Explanation:
The initial volume of liquid in the beaker = 0.250 l
The volume of liquid the student pours out of the beaker = 0.00385 l
The volume of liquid remaining in the beaker, V, is given as follows;
V = The initial volume of liquid in the beaker - The volume of liquid the student pours out of the beaker
Therefore, we have;
V = 0.250 l - 0.00385 l = 0.24615 l
The volume of the liquid remaining in the beaker is 0.24615 l.
hi I'm new here and here to help
Answers
Answer: Welcome to Brainly!
We are happy to have you! :)
400 cm^3 =
L (Given: 1 cm^3 = 1 mL)
Answers
Answer:
1 cm^3 = 1 mL
Then
400 cm^3 = 400mL
Now convert mL to L
400/1000
0.4liter
find the density . mass is 12.52 g and the volume is 20.98 mL
Answers
Answer:
0.5968 g/mL
Explanation:
To calculate density:
density
[tex] \frac{mass}{volume} [/tex]
Therefore,12.52g divide by 20.98mL is 0.5968g/mL
Two or more different elements chemically combine to form compounds.
True or false
Answers
Answer:
true
Explanation:
You have decided that you want to make ice cubes. You put them in the freezer and they become solid at 32°F. What
temperature will the ice cubes melt?
32°F
100°F
OF
It's impossible to tell.
Answers
lago claro todo esta lleno de basura
Answer:
I think its about the same tempurature so i would say 32 degrees
Explanation:
Notice that the curve shows periods where the temperature does not change. These plateaus occur because energy is being used to changing the substance's phase, not raise the temperature. This is why water will not get hotter as it is boiling.
A regulation that should be followed to prevent accidents is called safety blank
Answers
Answer:
Safety Regulations
Explanation:
hope this helps:)
How do you determine the charge of an isotope?
Answers
Answer:
If the protons in the atom outnumber the electrons, the isotope has more positive charges than negative charges but If the number of electrons exceeds the number of protons, the ion charge will be negative.
Explanation:
The charge of an isotope is defined by how many more protons there are than electrons.
Or the other way around.
For example if there are 4 protons and 2 electrons, the ion charge is +2 because there are more protons.
If there are 4 electrons and 2 protons, the ion charge is -2 because there are more electrons.
difference between halogens and group 0 elements
Answers
Answer:
Colourless. Although they have similar properties they are not identical. For example, as you descend Group 0 the density of the gas increases as does the mass of a single atom. ... All the halogens exist as molecules, bonding covalently to their own atoms - adding stability as they complete their full outer shells.The difference between halogens and group 0 elements is that in their electronic configurations the halogens have 1 electron less than the stable octet while the zero group elements have stable octet.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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What is the protons role in the atom?
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yes correct answer......
same answer by me .....
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What causes the motion of particles? And more energy equals what?
Answers
Answer:
particles in solids are always vibrating (moving back and forth) in place the vibrational motion of particles in solids is kinetic energy heat makes the particles in a solid vibrate faster, giving them more kinetic energy faster-vibrating particles bump into one another more often and hit each other harder
Which best describes a chain reaction associated with a nuclear reaction?!!
Answers
Answer: The statement that describes a chain reaction brought about by a nuclear reaction is "neutrons released during a fission reaction cause other nuclei to split." This is applicable to fission reactions only wherein atoms split and produce neutrons that also cause further atoms to split, thus creating a chain or series of reactions.
plz mark brainliest
a liquid that occupies the volume of 3.23 L has a mass of 3.188 kg what is the density of this liquid in kilograms to liters
Answers
Answer:
0.97 kg/l
Explanation:
the Earth and moon have different forces of gravity.
Which measurement did they not use? *
mass
density
weight
O
volume
Answers
Answer:
volume
Explanation:
the mass is the same on earth as it is on the surface of the moon. The weight is determined by the force of gravity. The density is the thickness. But the volume is not a factor.
Pluto's average distance from the Sun is about 3,666,000,000 miles. What is this in inches?
Answers
Answer:
2.3227776e+14
Explanation:
Its a massive number
Pluto's average distance from the Sun is about 3,666,000,000 miles and in inches it is 2.3227776e+14.
What is lunar phase ?
Lunar phase is the phase of moon which is viewed from the earth, the lunar phase is also known as moon phase is a shape of moon's directly sunlit portion and it can be expressed quantitatively.The current moon phase for today is the new moon phase.The moon is known as earth's only natural satellite and combinedly with earth it forms the earth-moon satellite system.
The size of moon is one quarter of earth in diameter. It is fifth largest satellite in the solar system. The distance of moon from earth is 384,400 km. The radius of moon is 1,737,4 km. The gravity of moon is 1.62 m/sec^2.
The total surface area of moon is 3.793×10^7 km square and it's surface pressure is 10^-7 Pascal.There are total 8 phase of moon and these are new moon, first quarter, waxing gibbous, third quarter and waning crescent.
Therefore,Pluto's average distance from the Sun is about 3,666,000,000 miles and in inches it is 2.3227776e+14.
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Your bedroom air conditioner blows very cold air at night but only cool air during the day. Your bedroom gets lots of direct sunlight all day long. What's the hypothesis and experiment.
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What is the experiment
Imagine you need to explain to a friend how to convert a value on a food label to one that is measured in grams. Assume the package of food has a mass of 1.0 pounds. write an explanation for how to use dimensional analysis to convert this value to one expressed in grams.
Answers
Answer:
453.592 grams
Explanation:
Given
Mass = 1 lb
Required.
Convert to grams using dimensional analysis
Represent 1 lb with x g
In unit conversion, we have that.
1 lb = 453.592 g
So:
Getting the equivalent of lb in g, we have:
x g = 1 lb * (453.592 g/ 1 lb)
x g = 1 * 453.592 g
x g = 453.592 grams
Hence:
The equivalent of 1 lb in grams is 453.592 grams
thomas atoms theroy
Answers
Answer:
Do you want to us to explain what it is
Explanation:
Answer:
APEX
Explanation:
The electron
A student places 1.38g of unknown metal at 99.6C into 60.50g of water at 22.1C. The entire system reaches a uniform temperature at 31.6C. Calculate the specific heat of the metal
Answers
Explanation:
Heat energy lost by metal = Heat energy gained by water.
(0.00138kg) * c * (99.6-31.6) = (0.006050kg) * 4.148 * (31.6-22.1)
c = 2.541J/kg°C
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
Express the following in regular notation:
3.4 x 10-1
A)O 34
B)O 0.34
C)0 3.4
D)0.00034
Answers
HELP!
Mrs. Grogan wants to know if she is packing the same amount of animal crackers for her son’s snack each day.
She fills up a sandwich bag full of animal crackers each day. Mrs. Grogan takes the mass of the animal crackers and discovers that she uses 23.4 g, 25.2 g, 24.3g, 24.4 g, and 24.8 g of animal crackers for each day during the week. Convert the average mass into kilograms and record your answser to the correct number of significant figures. NO UNITS!
Answers
what is hydraulic pressure?
Answers
a table that compares the properties of suspensions, colloids, and solutions.
Answers
Answer:periodic table
Explanation:
How do the number of protons in an atom affect the atom's
identity?
Answers
Answer:
The number of protons in an atom define each individual element because the number of protons is the atomic number which is the defining property of an atom and never changes. The number of protons determines an atom's identity. For example, Oxygen has an atomic number of 8, so it has 8 protons, so no matter what ionic compound or molecule it's part of, every single Oxygen atom will always have 8 protons each.
what does it mean to say that a hypothesis is falsifiable
Answers
Answer: This means that the answer can be proven wrong.
Explanation:
Hope this helps!!
Answer:
is means it can be proven false
Calculate the mass of oxygen needed to react 10g of calcium to form calcium oxide. 2 Ca + O2→2 CaO
Answers
Answer:
Explanation:
1122 g CaO.
I hope I helped you! :)
The mass of oxygen needed to react 10 grams of calcium to form calcium oxide is 4.0 grams.
Given:
The reaction:
[tex]2Ca+O_2\rightarrow CaO[/tex]
Mass of calcium = 10 g
To find:
The mass of oxygen needed to react 10 grams of calcium to form calcium oxide.
Solution:
[tex]2Ca+O_2\rightarrow CaO[/tex]
Mass of calcium = 10 g
Moles of calcium = [tex]\frac{10 g}{40.078 g/mol}=0.25 mol[/tex]
According to reaction, 2 moles of calcium reacts with oxygen, then 0.25 moles of calcium will react with:
[tex]=\frac{1}{2}\times 0.25 mol=0.125 \text{ mol of }O_2[/tex]
Mass of 0.125 moles of oxygen gas:
[tex]0.125 mol\times 31.998 g/mol=3.99975 g\approx 4.0 g[/tex]
The mass of oxygen needed to react 10 grams of calcium to form calcium oxide is 4.0 grams.
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Been struggling with this question for a while, some help will be appreciated :)
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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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