Explanation:
Total distance (d) = 560 meters
Time taken (t) = 25 seconds
Average speed
= d/ t
= 560/ 25
= 22.4 m/s
Hope it will help :)
Answer:
22.4 m/s
Explanation:
Is this the right answer
Answer:
srgerhe5h4hebdfbdfdfnafyn
Explanation:
How many moles are in a 4.5g of Sulfur?
Answer:
~0.14
Explanation:
There are roughly ~0.14 moles in 4.5g of Sulfur. 1 mol = 32.06 g of Sulfur, so we just find the ratio and then multiply.
Answer:
[tex]\boxed {\boxed {\sf About \ 0.14 \ mol \ S }}[/tex]
Explanation:
To convert from grams to moles we must use the molar mass. This can be found on the Periodic Table.
Sulfur (S); 32.07 g/molWe can use this number as a ratio or fraction.
[tex]\frac{ 32.07 \ g \ S }{1 \ mol \ S }[/tex]
Multiply by the given number of grams: 4.5
[tex]4.5 \ g \ S *\frac{ 32.07 \ g \ S }{1 \ mol \ S }[/tex]
Flip the fraction so the grams of sulfur cancel.
[tex]4.5 \ g \ S *\frac{1 \ mol \ S }{32.07 \ g \ S}[/tex]
[tex]4.5 *\frac{1 \ mol \ S }{32.07 }[/tex]
[tex]\frac{4.5 \ mol \ S }{32.07 }[/tex]
[tex]0.140318054 \ mol \ S[/tex]
The original measurement of grams had 2 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place.
The 0 in the thousandth place tells us to leave the 4.
[tex]0.14 \ mol \ S[/tex]
There is about 0.14 moles of sulfur in 4.5 grams.
Iron combines with 5 g of Copper (1) Nitrate to form 6.01 g of Iron (1) Nitrate and 0.4 g of copper
metal. How much Iron was required to complete this reaction?
What is the purpose of a spectroscope? *
A. to spread light into different wavelengths
B. to study a star's composition
C. to study a star's temperature
D. all of the above
PLEASE HELP!!
Explain why is ortho nitrophenol more acidic than ortho methoxyphenol
Answer:
Ortho nitrophenol is more acidic than ortho-methoxyphenol.
Reason:
This is because the nitro-group is an electron-withdrawing group. In the case of ortho methoxyphenol; methoxy group is an electron-releasing group. Thus, it increases the electron density in the O−H bond and hence, the proton cannot be given out easily.
Hope this helps you. Do mark me as brainliest.
What happens to the hydrogen-hydrogen and nitrogen-nitrogen bonds?
Answer:
hydrogen nitride
Explanation:
since they are bounding they would become a compound, and so it would need to expand
What is the molecular formula for C5H7 if its molar mass is 536 g/mol?
Answer:
(C5H7)8
Explanation:
It's empirical formula is given as; C5H7
Molar mass of carbon(C) = 12 g/mol
Molar mass of hydrogen(H) = 1 g/mol
We are told that it's molar mass is 536 g/mol.
To find the molecular formula;
Molecular formula = n × empirical formula
Thus;
n = 536/((12 × 5) + (1 × 7))
n = 8
Thus;
Molecular formula = (C5H7)8
Explain why hydrocarbons are present in so many different compounds.
Answer:
Many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. We use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil.
What is the correct empirical formula for C18H306?
When kci dissolved in ethanol what is the intermolecular attraction between k+ ions and ethanol molecules
Answer:
ion-dipole interaction
Explanation:
Ethanol is a polar molecule due to the presence of the polar O-H group in the molecule. This means that the molecule has a dipole moment.
The positive end of the dipole lies on hydrogen while the negative end of the dipole lies on oxygen.
When KCl is dissolved in ethanol, K^+ ions can interact with the negative end of the dipole in ethanol by ion-dipole interaction.
With reference to He-4 (or the diagram), explain the term isotopes.
Answer:
Isotopes are basically atoms of an element that have an unequal number of neutrons and protons. Of course the proton number remains the same, but the neutron number either decreases or increases, which leads to an overall change in mass. However, no chemical properties of the atom/element are changed as the electrons are the same number and do not react. In regards to Helium 4, the original number of neutrons in Helium is 2, and protons 2 as well. We see an equal number of neutrons and protons, hence an unchanged mass, and the element is not an isotope.
How many grams are in 0.75 moles of SO2
48 g SO₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
0.75 mol SO₂
Step 2: Identify Conversions
[PT] Molar Mass of S - 32.07 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of SO₂ - 32.07 + 2(16.00) = 64.07 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 0.75 \ mol \ SO_2(\frac{64.07 \ g \ SO_2}{1 \ mol \ SO_2})[/tex]Multiply/Divide: [tex]\displaystyle 48.0525 \ g \ SO_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
48.0525 g SO₂ ≈ 48 g SO₂
if there is 4 protons, 2 electrons, 5 neutrons what is the iconic charge and what element is this ?
Answer:
Be^2+
Explanation:
The atomic number indicates the number of protons so the element is Be (beryllium)
So now we know that a neutral atom contains four electrons but there are 2 so that means two electrons were taken away, making it positive. It would be a 2+ charge.
can someone help me with all of those pls!!!!
how are inclined planes used in the real world
Answer:
hi
Explanation:
Inclined planes are widely used to move heavy loads over vertical obstacles; examples vary from a ramp used to load goods into a truck, to a person walking up a pedestrian ramp, to an automobile or railroad train climbing a grade. ... The screw consists of a narrow inclined plane wrapped around a cylinder.
Have a nice day
What is the relationship between extinction and biodiversity ?? PLEASE ANSWER!!!!!!!
Answer:
The biodiversity of an area is literally the number of species, both plant and animal, inhabiting the environment being examined. When a species is no longer found in a region, it is locally extinct.
Explanation:
Sophia was fascinated while studying the role of oceans in the hydrosphere. She decided to illustrate the features of the ocean floor on a poster for her part in a group project. Identify and describe the kinds of features found on the ocean floor.
Answer:
The Major features of the ocean floor are:
Continental ShelfContinental SlopeContinental RiseAbyssal PlainOceanic TrenchMid-Ocean RidgeExplanation:
1. Continental Shelf: This refers to the part of the land on every continent that is covered with water that is not too deep. The types of animals that can be found on the continental shelf are:
Crab, Tuna, Lobster, Dungeness cod, etc. Within the Continental shelf, there are permanent rocks that house other organisms such as sponges, anemones, clams, sponges, oysters. The continental shelf also contains the route of migration for bigger animals such as sea turtles dolphins and even whales.
2. Continental Slope: This spans from the shelf break to the continental rise. It can slope up to 4 degrees. Slopes can be created by faulting, slumping of huge boulders of sediments, rifting, etc.
Some of the aquatic animals that can be found in this region include but are not limited to:
Sablefish, Dover sole rockfish, etc.
3. Continental rise
This part of the ocean floor usually has a very steep gradient or angle slope. It slopes very steeply into the abyssal plain of the ocean.
The following can help form continental rise:
Mass wasting;deposition from contour currents and the longitudinal settling of biogenic and clastic particles4. Abyssal Plain.
This is the real bottom of the ocean. There is a very high probability that one would find animals such as nematodes, polychaetes, etc which are all types of worms down there. The Abyssal plain is also home to molluscs, and echinoderms.
5. Oceanic Trench
Sometimes there is a long and narrow indenture or depression along the seafloor. These are called Trenches. Trenches are sometimes formed by the boundaries between one lithospheric plate and another. The deepest trench on earth is found in the Pacific Ocean. It has been nick-named the Challenger Deep and said to be the deepest point known on earth reaching almost 11 kilometers.
6. Mid-Ocean Ridge
This is a mountain range underneath the ocean. It is formed when there is an upward push by convection currents of the mantle beneath the oceanic crust. When this happens and molten magma is ejected or created at the boundary between the plates, the result is a Mid-Oceanic Ridge.
Cheers
Which organism obtains energy without depending on another organism
Answer:
Plants
Explanation:
What is the SI unit of time?
A.
second
B.
minute
C.
hour
D. day
Answer:
option a. second
.............
what is an acid containg oxygen?
Explanation:
An oxyacid, oxoacid, or ternary acid is an acid that contains oxygen. Specifically, it is a compound that contains hydrogen, oxygen, and at least one other element, with at least one hydrogen atom bonded to oxygen that can dissociate to produce the H+ cation and the anion of the acid.
Answer:
oxyacid, oxoacid
Explanation:
An oxyacid, oxoacid, or ternary acid is an acid that contains oxygen. Specifically, it is a compound that contains hydrogen, oxygen, and at least one other element, with at least one hydrogen atom bonded to oxygen that can dissociate to produce the H+ cation and the anion of the acid.
how many molecules are in SO4
Answer:
there are 5 molecules in SO⁴
What two physical properties depend on the sample size of a substance? Give examples for
each.
Answer:
Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present.
What do plants need in order to make food?
A. water, energy, oxygen
B.carbon dioxide, energy, oxygen
C.water, energy, carbon dioxide
D.water, oxygen, carbon dioxide
Answer:
Water, solar energy, carbon dioxide
Explanation:
Minerals are part of the Geosphere, which is composed of several layers.
O True
O False
Which of the following would SLOW DOWN the rate of chemical
weathering?*
Decreasing surface area
Increasing the temperature
Increasing rainfall
O Increasing surface area
Answer:
increasing rainfall. hope it help
When two objects with neutral charges are brought together, the objects
a. attract each other
b. repel each other
c. all of the above
d. none of the above
Answer:
a. attract each other
Explanation:
When two additional electrons are required to follow the octet rule a ____________ bond is created
Answer
o double covalent bond is cteated.
Can someone help me ?
Explanation:
11. The correct option is B. The range for polar covalent bond is; 0.3 - 1.4
12. C. This is because there is uneven distribution of the charge. Unlike in the other options which are molecules of the same atoms with equal electronegativity.
13. A. Resonance structures is the correct option. It describes electrons in certain molecules or polyatomic ions where the bonding cannot be expressed by a single Lewis formula.
14. A. Lower electronegativity values means the electrons are more likely to be shared than transferred (gain/lost).
15. D. H2O is more polar than H2S because of the electronegativity of oxygen. H2O also has hydrogen bonds.
16. C. Due to the geometry of the other molecules, the polarity are cancelled.So they have a net polarity of zero.
How many grams of sodium nitrate are needed to prepare a 0.965 M sodium nitrate solution that contains 1,640 g of water?
Answer:
134.5 g
Explanation:
Let us recall that 1g of water = 1cm3 of water
Hence;
1,640 g of water = 1,640 cm3 of water or 1.64 L
This is now the volume of the solution
Now;
m/M = CV
m = mass of the solute
M = molar mass of the solute
C = concentration of the solution
V = volume of the solution
m/84.9947 g/mol = 0.965 M * 1.64 L
m = 0.965 M * 1.64 L * 84.9947 g/mol
m = 134.5 g
Which characteristic is true of sexual reproduction but not of asexual reproduction?
Answer:
j one or more parents. that's the answer