Answer:
It all started with the big bang.
The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching).
The heat required to raise the temperature of 12g of water from 16 C to 21 C is:
Fill in the blank with either "up" or "down"
a. If the pressure of a gas increases, the temperature will go up
b. If the volume of a gas increases, the pressure will go up
c. If the volume of a gas increases, the temperature will go up
d. If you increase the amount of gas, the pressure will go down
Answer:
a. up
b. down
c. up
d. up
Explanation:
what are 3 examples of pairs of atoms with polar covalent bonds?
Answer:
Water - H2O
Ammonia - NH3
Sulfur dioxide - SO2
Hydrogen sulfide - H2S
Ethanol - C2H6O
Explanation:
Those are some atoms with polar covalent bonds. Hope this helps!!
How is the modern periodic table arranged?
by increasing atomic number
by increasing electronegativity
by increasing ionic size
by increase in atomic mass
Can someone help me please.
Answer:
6 atoms since it says (6o2 and 6co2) notice how there's a 6 before the o2 and co2 ? (oxygen and carbon dioxide ?)
5) The phase of matter where particles at extremely high temperatures become ionized
Answer:
plasma
Explanation:
Plasma, in physics, an electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized. It is sometimes referred to as the fourth state of matter, distinct from the solid, liquid, and gaseous states.
Which of the following are an example of a polysaccharide?
A.starch
B.chitin
C.cellulose
D.sucrose
Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A
Find any errors in the orbital notation diagrams below and correct them.
Answer:
See explanation.
Explanation:
A. 2s is incorrect, the right arrow should be pointing downwards.
B. In 2p, the last box has 3 arrows. This is invalid. Each box can only store 2 arrows(electrons). The last arrow should be moved to a 3p orbital (new box).
C. In this one, the arrows switched directions (left is down and right is up). You could fix each box or just the last one (in 3p) to point downwards.
A cube of aluminum has a mass of 500g. What will be the mass of a cube of magnesium of the same dimensions?
(Density of aluminum is 2.7g/ml)
The mass of a cube of magnesium : 322.2 g
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
The unit of density can be expressed in g / cm³ or kg / m³
Density formula:
[tex]\large{\boxed {\bold {\rho~=~ \frac {m} {V}}}}[/tex]
ρ = density , g / ml
m = mass , g
v = volume , ml
mass of aluminum = 500 g
density of aluminium = 2.7 g/ml
there is data that needs to be added⇒ density of magnesium : 1.74 g/ml
the same dimensions = the same volume
volume of aluminum[tex]\tt V=\dfrac{m}{\rho}\\\\V=\dfrac{500}{2.7}=185.19~ml[/tex]
mass of magnesiumV magnesium = V aluminum
[tex]\tt m=\rho\times V\\\\m=1.74\times 185.19\\\\m=\boxed{\bold{322.2~g}}[/tex]
The cube of same dimensions of magnesium and aluminum have same volume. The mass of cube of magnesium has been 321.85 grams.
What is density?The density has been given as the mass of substance per unit volume. The density of aluminum cube has mass 500 grams, and density 2.7 g/mL. The volume of the aluminum cube has been:
[tex]\rm Density=\dfrac{Mass}{Volume}\\\\2.7\;g/mL=\dfrac{500\;g}{Volume} \\\\Volume=185.18\;mL[/tex]
The volume of the magnesium and aluminum cube has been the same. The density of magnesium has been 1.735 g/mL. Thus, the mass of Mg cube has been given as:
[tex]\rm 1.738\;g/mL=\dfrac{Mass}{185.18\;mL}\\\\ Mass=321.85\;g[/tex]
Thus, the mass of magnesium cube has been 321.85 grams.
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How many grams of silver nitrate are required to produce 0.25 mol of silver sulfide
how to get rid of my sisterrrr
Answer:
You don't
Explanation:
Unless you ask your sister to
Ship her away (DO NOT ACTULLY DO THAT)
simply just ask her to leave you alone
calculate the volume of 0.200 m cacl2 needed to produce 2.00 g of caco. there is excess of na2co3
Answer:
x100.
Explanation:
Na2CO3 (aq) + CaCl2(aq) → CaCO3 (s) + 2 NaCl (aq)
For example, if we use 2.00 g CaCl2 x 1 mole = 0.0180 mole CaCl2
111 g CaCl2
and mix it with 2.00 g Na2CO3 x 1 mole = 0.0189 mole Na2CO3
106 g.
AB + CD → CB + AD, where A and C are cations and B and
D are anions
Answer:
x100 this is the answer I didn't do explanation sorry for that
Please help brainiest is award!!!!!!!!!!!
Answer:
it doesnt even give you enough information for you to answer it
Explanation:
Answer:
it doesnt even give you enough information for you to answer it
Explanation:
You pour some juice from a short, wide glass into a tall, narrow glass. What happens to the volume of the juice? Explain your reasoning.
Answer: the volume increases
Explanation: It increasses because the volume is how tall it is
What is a Newton unit?
Answer:
Units of force.
Explanation:
Issac Newton created the laws of motion and discovered gravity.
PLEASE HELP ASAP ONLY HAVE 10 MINUTES. A certain photon of light has a wavelength of 422 x 10 -9 m. What is the frequency of the light? Show work
Answer:
7.11 x [tex]10^{14}[/tex] Hz
Explanation:
The equation for converting wavelength to frequency is ν=c/λ, or the speed of light over wavelength. The speed of light is 3.00 x [tex]10^{8}[/tex], and our wavelength here is 422 x [tex]10^{-9}[/tex]. All we have to do now is substitute our given values:
[tex]\frac{3.00x10^{8} }{422x10^{-9}}[/tex]
After reduction, our answer comes out to be about 7.11 x [tex]10^{14}[/tex] Hz.
Oxygen and silicon makes up what percentage of the Earth crust.
A) 57% B) 98.5% C) 75% D) 50%
answer
the answer is C
explanation
this is because the oxygen makes up 46.1%of the earth's surface while silcon is 28.5% and the question says "what makes up" which means you should add them and it becomes 74.6% which Is approximately 75%
How does increasing the mass affect the kinetic and potential energy of a pendulum?
Explanation:
Anytime matter is in motion it has kinetic energy. The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Both the kinetic energy and potential energy are directly proportional to the mass of the object. Hence, increasing the mass will increase the kinetic and potential energy of the pendulum.
What is kinetic energy ?The kinetic energy of an object is generated by virtue of its motion. Whereas, the potential energy is generated by virtue of its position. hen the object is at rest, the energy is stored in it in the form of potential energy. When the object starts moving, its potential energy starts to converts to kinetic energy.
The kinetic energy of an object is related to its mass and velocity by the equation:
Ke = 1/2 mv²
Potential energy P = mgh
where, g is the acceleration due to gravity and h is the height of the object from the surface.
Hence, both potential energy and kinetic energy are directly proportional to the mass of the object. An increase in mass increase both form of energy of the object.
Therefore, the kinetic and potential energy of the pendulum increases with mass.
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Explain how the crystals of an igneous rock are used to help classify it. PLEASSSEEEE HELP ME
The crystals of igneous rock are formed due to different chemical composition, size and structure of the rocks
Formation of igneous rockThe crystals of an igneous rock are used to classify its own because the crystals of igneous rock are formed due to different chemical composition as well as size and structure. Igneous rocks are the type of rocks which are formed when magma cools and change into solid state.
They are classified on the basis of grain size, silica content, and silica saturation. The igneous rock is depend on the rate of cooling i.e. slow cooling causes the formation of large crystals whereas fast cooling produces small crystals. The igneous rocks are classified according to their chemical composition.
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Which system works with the reproductive system? (Hint, its not C)
A. Endocrine system
B. Excretory system
C. Respiratory system
D. Skeletal system
Answer:
A
Explanation:
Option B, Excretory System
The amount of matter inside an object is called what?
If you can run 3 miles in 19 minutes. What is your pace in kilometers per hour?
Report your answer with 3 significant figures. (1 km = 0.621371 miles)
Answer:
10.1389
Explanation:
What is the relationship between the temperature and the rate of the reaction?
negative
neutral
positive
i think it would be neutral
In what way is a decomposing log in a forest a microhabitat ? It supports small organisms within a habitat, while the forest houses the log itself It supports small organisms within a habitat, while the forest houses the log itself it provides camouflage for organisms to protect themselves it provides camouflage for organisms to protect themselves it decomposes matter that enriches the soil it decomposes matter that enriches the soil it is a large community of organisms that occupy a large habitat
Answer:
A microhabitat is a small or localized ecosystem in a larger ecosystem where a range of small populations of plants and animals sustain and main a micro-ecosystem.
Rotting or decomposing log is an example of the microhabitat as it provides food shelter, and various plants and organisms found and interact to make it an ecosystem. There are also interactions between biotic and abiotic factors. Many other characteristics present in this small ecosystem as given in the question.
A microhabitat is a small or localized ecosystem in a more extensive ecosystem a range of small populations of plants, animals sustain main a micro-ecosystem.
What is a Micro-ecosystem?
A rotting or decomposing log is an illustration of a microhabitat as it nourishes food shelter, and different plants and organisms found and interact to create an ecosystem. There are also interchanges between biotic and also abiotic factors. Multiple different characteristics are present in this small ecosystem as given in the question.
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Which is not an example of an element ?
Answer:
include all compounds.
Answer:
CO2 is a pure compound
Explanation:
Element non examples include all compounds, which are substances made when two different types of atoms form a chemical bond. Any material made by mixing elements is no longer an element. Anytime you see a chemical formula with more than one element symbol in it, it's an element non example.Pure elements are Substances which are made up of only one kind of atom. Air is a mixture of element and compound whereas alcohol in water is a mixture of compounds. CO2 is a pure compound and not an element.
15 Points For A Unnecessary Question, Is It Bad If I Drink Water With Food Coloring?
Yes
No
Answer:no
Explanation:as long as it’s not too much of it then no , it’s not bad . food coloring gets tested to be safe for human consumption so you’re good
Food coloring should be edible and safe on food (hence the name). If it's safe on food, then it should be safe to drink with water. Of course check with the label to be sure.
You pour a spoonful of salt into a glass of water. Explain what happens to the mass of the salt and the mass of the water.
Answer:
If you pour a spoonful of salt into a glass of water, the sodium will react with the water and increase the mass.
Explanation:
According to kineric molecular theory which statement descrives the particles in a sample of an ideal gas
Answer:
According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? The motion of the gas particles is random and in a straight-line.
Explanation:
What is the main type of energy in an iphone charging cable?
Answer:
replace its predecessor, the 30-pin dock connector, the Lightning connector is used to connect Apple mobile devices like iPhones, iPads, and iPods to host computers, external monitors, cameras, USB battery chargers, and other peripherals.
is hydrogen a neutral atom or ion
Answer:
Hydrogen is the smallest chemical element. It has one proton and one electron, making it neutral. However, the ions of hydrogen atom are charged species. Thus, the key difference between hydrogen atom and hydrogen ion is that the hydrogen atom is neutral whereas hydrogen ion carries a charge.
Answer:
A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus. That tiny little atom (the tiniest of all) has only one electron and one proton. You can take away the electron and make an ion, but you can't take away any neutrons.
Explanation: