Answer:
solar energy
Explanation:
A 100kg sumo wrestler named Bob is doing his daily run. He runs at a velocity of 8m/s. After the run Bob stops for a rest, and sits at the river.
What is Bob's momentum will resting at the river?
Question 10 options:
800 kgm/s
800 kgm/s^s
0 kgm/s
12.5 kgm/s^2
Answer:
0 kgm/s
Explanation:
The momentum of Bob while resting at the river is 0 kgm/s.
This is because the momentum of any object at rest is 0.
Momentum is the quantity of motion a body contains. It is mathematically expressed as;
Momentum = m x v
m is the mass
v is the velocity
So at rest, the velocity of a body is 0m/s and therefore, the momentum is O
Electric circuit are a pathway for ____ to flow
A.) Neutrons
B.) Protons
C.) Matter
D.) Electrons
Answer:
Electrons
Explanation:
The source that gives the voltage (force) causes the electrons to move.
Answer:
The answer is Electron
Explanation:
Which best explains the difference between a monomer and a polymer?
A monomer is larger than a polymer.
A monomer contains carbon and a polymer does not.
A polymer contains carbon and a monomer does not.
A polymer is larger than a monomer.
The difference between the monomer and a polymer should be that monomer should be larger than a polymer.
Difference of monomer and a polymer?The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.
Also, it represent the building blocks of polymers that contain more complex type of molecules
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Answer:
A
Explanation:
The chemical equation for the combustion of acetylene (C2H2) is given below.
2C2H29) + 502(9)—-4C02(g) + 2H2O(g)
What volume of oxygen at STP is required for the complete combustion of 100.50 mL of C2H2?
Answer:
309.2 ml of oxygen
Explanation:
2 ( 12X2 +Ix 2 ) = S2 ml
O2 = 5 x 16 x 2 = 160 ml
volume of O2 needed = 160×100. 5 / 52 = 309.2 ml
Answer:
d
Explanation:
Please help..
Describe how to perform a three step 1:100 serial dilution of 10μlof a bacterial culture.
Answer:
For a 1:100 dilution, one part of the solution is mixed with 99 parts new solvent. Mixing 100 µL of a stock solution with 900 µL of water makes a 1:10 dilution. The final volume of the diluted sample is 1000 µL (1 mL), and the concentration is 1/10 that of the original solution
Explanation:
i hope that gives you an idea
TRUE or FALSE: The rock closest to the ridge is newer and younger than the older rock
further away from the ridge.
Answer:true
Explanation:
True or False: Sulfur by itself isn't too bad, it's when it reacts with other elements that it can become dangerous
Answer:sulfer by itself is not pleasant and it can be dangerous by itself but in large amounts.
Explanation:
Answer:
True.
Explanation:
Also did you know that it is combined with chlorine that it becomes salt? Cool right? Two deadly things combining to become a condiment
0.45 g of hydrated sodium carbonate crystals were heated until 3.87 of anhydrous power remained.
How many moles of water are there in one mole of hydrated salt?
Formula of hydrated sodium carbonate : Na₂CO₃.10H₂O, so moles of water in one mole of hydrated salt = 10
Further explanationHydrate is a compound that binds water (H₂O), usually in the form of crystals/ solids
If these compounds are dissolved in water or heated, the hydrates can decompose:
Example: X.YH₂O (s) → X (aq) + YH₂O (l)
The formula for the hydrated compound contains: YH2O
The mole ratio shows the ratio of the coefficients of the hydrate compound
10.45 hydrated sodium carbonate(Na₂CO₃.xH₂O) were heated until 3.87 of 3.87of anhydrous (Na₂CO₃) remained, so
mass H₂O released :
[tex]\tt 10.45-3.87=6.58~g[/tex]
mass Na₂CO₃ = 3.87 g
mol ratio Na₂CO₃(MW= g/mol) : H₂O(MW=18 g/mol) =
[tex]\tt \dfrac{3.87}{105,9888}\div \dfrac{6.58}{18}=0.0365\div 0.3655=1\div 10[/tex]
If you have 2.0 moles of sodium chloride (NaCl), what is its mass in grams?
Answer:
117g
Explanation:
Given parameters:
Number of moles = 2moles
Unknown:
Mass of NaCl = ?
Solution:
To solve the problem, we need to use the expression below;
Mass of NaCl = number of moles x molar mass
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
So;
Insert the parameters and solve;
Mass of NaCl = 2 x 58.5 = 117g
If a metal donates or loses an electron it becomes a..
A. Ionic
B. Covalent
C. Metallic
Answer:
c
Explanation:
Answer:
the answer to your question is c
Which model best represents a pattern?
Antenne UHF
Chaum
RTG
Master
Antenne
grand gain
DAN
REMS
RAD
SAM
Chemin
if you drop soap on the floor is the soap dirty or is the floor clean?
Answer:
hahahaha the soappp is dirty and the floor gets clean
When temperture changes matter undergo this. that is shift one form to another
Answer:All matter can move from one state to another. It may require extreme temperatures or extreme pressures, but it can be done. Sometimes a substance doesn't want to change states. You have to use all of your tricks when that happens. To create a solid, you might have to decrease the temperature by a huge amount and then add pressure. For example, oxygen (O2) will solidify at -361.8 degrees Fahrenheit (-218.8 degrees Celsius) at standard pressure. However, it will freeze at warmer temperatures when the pressure is increased.
Some of you know about liquid nitrogen (N2). It is nitrogen from the atmosphere in a liquid form and it has to be super cold to stay a liquid. What if you wanted to turn it into a solid but couldn't make it cold enough to solidify? You could increase the pressure in a sealed chamber. Eventually you would reach a point where the liquid became a solid. If you have liquid water (H2O) at room temperature and you wanted water vapor (gas), you could use a combination of high temperatures or low pressures to solve your problem.
Points of Change
Phase Changes: Pressure and temperature define the state of matter for water.Phase changes happen when you reach certain special points. Sometimes a liquid wants to become a solid. Scientists use something called a freezing point or melting point to measure the temperature at which a liquid turns into a solid. There are physical effects that can change the melting point. Pressure is one of those effects. When the pressure surrounding a substance increases, the freezing point and other special points also go up. It is easier to keep things solid when they are under greater pressure.
Generally, solids are more dense than liquids because their molecules are closer together. The freezing process compacts the molecules into a smaller space.
There are always exceptions in science. Water is special on many levels. It has more space between its molecules when it is frozen. The molecules organize in a specific arrangement that takes up more space than when they are all loosey-goosey in the liquid state. Because the same number of molecules take up more space, solid water is less dense than liquid water. There are many other types of molecular organizations in solid water than we can talk about here.
CHEMISTRY TERM PHASE CHANGE
Fusion/Melting
Freezing
Vaporization/Boiling
Condensation
Sublimation
Deposition
Solid to a Liquid
Liquid to a Solid
Liquid to a Gas
Gas to a Liquid
Solid to a Gas
Gas to a Solid
Explanation:
evanrosario11 avatar
evanrosario11
7 minutes ago
Physics
High School
100 Points + Brainlest PLZ HElP
What ion would each of the following elements form?
For example, a sodium atom (Na) will form a sodium ion (Na+1). You will need to list the charge of the ion. You will need to list the charge of the ion for the seven questions below.
1. Beryllium (Be)
2. Sulfur (S)
3. Potassium (K)
4. Aluminum (Al)
5. Bromine (Br)
6. Oxygen (O)
7. Magnesium (Mg)
Answer:
Forming positive ions
Explanation:
A sodium atom has one electron in its outer shell. ... It will still have 11 positive protons but only 10 negative electrons. So, the overall charge is +1. A positive sign is added to the symbol for sodium, Na +.
Hope it helps
xoxo
Explanation:
Forming Positive Ions
Hope It Helped U
I need help please and thank you
Answer:
ooooooooooooooooooh i dont know this one
Explanation:
im not good a math at all
where information about each element is located
Answer:
On the pereiodic table.
Explanation:
Why does an ionic bond transfer electrons instead of sharing?
When there is a whole transfer of valence electron between the atoms is called an ionic bond. In this type of bond construction, the atoms get contrarily charged.
The ionic bonds are formed due to electronegativity. According to Pauling, the capability of an atom to draw electrons towards itself is called electronegativity.
When there is a huge contrast in electronegativity between the atoms, the electrons are completely transferred between the atoms.
The atom that relinquishes an electron are called a cation and is positive whereas the atom that acquires an electron are called anions and are negatively charged.
Therefore, due to electronegativity, ionic bonds are formed.
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A group of tourists were on an outing when they noticed that precipitation began to fall. The air temperature was 32 degree Fahrenheit. What type of precipitation did they most likely see?
Answer:
The correct answer is - rain.
Explanation:
At 32 degrees c or zero degrees Celsius, droplets of water in the atmosphere do not freeze as it is not the temperature at which water freezes but it is the temperature at which ice melts.
At this temperature the water changes its state, below 32 degrees Fahrenheit the water freezes but in the atmosphere, it not freezes necessarily and remains in the liquid state and called super-cooled liquid or water. Above this temperature, water in liquid state.
Thus, the precipitation is in the form of rain.
How would adding the catalyst nitrogen monoxide (NO) affect this reaction?
2SO2(g) + O2(g) → 2SO3(g)
A) NO increases the rate at which SO3 molecules are formed.
B) NO reacts with SO3 to produce more SO2 molecules.
C) NO decreases collisions between the SO2 and O2 molecules.
D) NO increases the concentration of the SO2 and O2 molecules.
E) NO increases the activation energy of the SO2 and O2 molecules.
Answer: A) NO increases the rate at which [tex]SO_3[/tex] molecules are formed.
Explanation:
A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more reactant molecules can cross the energy barrier by undergoing collisions and convert to products.
[tex]2SO_2(g)+O_2(g)\rightarrow 2SO_3(g)[/tex]
Thus NO will increase the rate of reaction by lowering the activation energy and thus the colllisions among [tex]SO_2[/tex] and [tex]O_2[/tex] molecules will incraese which in turn will lead to formatioon of more [tex]SO_3[/tex] molecules.
Answer:
A) NO increases the rate at which molecules are formed.
Explanation:
PLATO
In a short paragraph, explain one thing you've learned from the course this year.
Answer:
ive learned about the chart , ive learned about the coolest chemicle reactions and how. the can change colors , ive also learned that chenistrey is all around us since the beginning of life ,and how liquid can turn solid
Explanation:
When an ionic bond forms what type of ions are joined?
A tank containing oxygen, carbon dioxide, and nitrogen gases has a total pressure of 6.7
atm. If the O2 has a pressure of 3.0 atm and the carbon dioxide has a pressure of 1.2
what is the partial pressure of the nitrogen gas?
Answer:
P(N₂) = 2.5 atm
Explanation:
Given data:
Total pressure of gasses = 6.7 atm
Partial pressure of O₂ = 3.0 atm
Partial pressure of CO₂ = 1.2 atm
Partial pressure of N₂ = ?
Solution;
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P(total) = P(O₂) + P(CO₂) + P(N₂)
6.7 atm = 3.0 atm + 1.2 atm + P(N₂)
6.7 atm = 4.2 atm + P(N₂)
P(N₂) = 6.7 atm - 4.2 atm
P(N₂) = 2.5 atm
PLEASE HELP!!!!
7. According to Mohs Hardness scale, which of these groups of minerals can scratch fluorite? А. B. talc, calcite, and apatite calcite, quartz, and topaz apatite, orthoclase, and corundum diamond, gypsum, and quartz C.
Answer:
B
IS THE CORRECT ANSWER
lonic bonds tend to form between
a. nonmetals; nonmetals
b. metals; nonmetals
c. metals; metals
d. all of these
atoms are so small that approximately _________ of them can fit on the head of a needle?
Answer:
5 million
Explanation:
How many liters will 90.0 grams of xenon gas (Xe) occupy at STP?
HELP PLEASE
Answer:
22.4L
Explanation:
not sure if its totally correct but I tried
Which is the correct Lewis dot structure for BeH2 ?
The correct Lewis dot structure for [tex]BeH_2[/tex] is Be : H : H
What does the Lewis dot structure show?The Lewis dot structure shows the valence electrons as dots. The valence electrons of beryllium are shown as 2 dots on the left side of the atom.
The central atom, beryllium, has 2 valence electrons where each hydrogen atom has 1 valence electron. To form a stable molecule, beryllium shares its 2 valence electrons with the 2 hydrogen atoms, each of which shares its 1 valence electron with beryllium which gives each atom a full outer shell of electrons.
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Question 20 (1 point)
The chemical formula for glucose, a simple sugar, is CH1206. The formula for ethanol is CzH60. What
accounts for the differences in these compounds?
Answer:
A. The ratio of the element in glucose is different than in ethanol
Explanation:
The compounds given are;
Glucose C₆H₁₂O₆
Ethanol C₂H₆O
The two compounds given are different from one another. But they have the same elemental composition.
Ethanol is made up of Carbon, hydrogen and Oxygen and so also, Glucose
Now,
The number of atoms in both compounds are different;
Number of atoms
C H O
Glucose 6 12 6
Ethanol 2 6 1
how does atomic radius affect coulombic attraction?
Where do elements in the human body tend to be located on the PERIODIC TABLE? (NOT PERCENTAGES PLEASE)
Answer:
Oxygen, Carbon, Hydrogern, Nitrogen, Sulfur, and Chlorine are all non-metals
Calcium, Potassium, Sodium, and Magnesium are all metals
Explanation:
The human body is made of elements at the most simple level. Oxygen in group 16, carbon in group 14, hydrogen located in group 1, and nitrogen and phosphorus in group 15.
What are the elements of the body?The body is composed of elements and atoms at the most preliminary level of organization. The elements are placed in a periodic table based on the atomic number that is characteristic of their properties. The elements are arranged into 18 families and groups.
oxygen is located in group 16, carbon in group 14hydrogen in group 1nitrogen in group 15calcium in group 2potassium in group 1sulfur in group 16sodium in group 1chlorine in group 17magnesium in group 2Therefore, elements are classified as alkali metals, alkaline metals, nonmetals, noble gases, halogens, and transition metals.
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