Answer:
the components of air can be separated by chemical means
Answer:
D) The exact mixture of components varies from point to point.
Explanation:
Here's why: Air can be considered a homogeneous mixture.The exact mixture of components varies from point to point. Air is made up of individual elements and compounds. When near a cow pasture, you can smell the compounds associated with cow patties but you can not see these as separate from the rest of the air
Does Phosphorus (P) gain/lose electrons to form ions
Answer:
phosphorous gain electron to form ions
Explanation:
Hey, it'd be really cool if someone could help me with this-- 15 pts!
Complete and balance this chemical equation: NaClO3 ---> _____
Answer:
NaCI + O2= NaCIO3 I think
Use the drop-down menus to complete the sentences describing what happens when the temperature of a fluid increases. The kinetic energy of the molecules . The speed of the molecules . The density of the fluid . The fluid
Answer:
The kinetic energy of the molecules
increases
.
The speed of the molecules
increases
.
The density of the fluid
decreases
.
The fluid
rises
.
Explanation:
this is correct on edge
When the temperature of a fluid increases, then the kinetic energy of the molecules INCREASES, the speed of the molecules INCREASES, the density of the fluid DECREASES, and the fluid RISES.
Kinetic energy can be defined as motion energy, whereas potential energy is energy stored to be used when required.In a given object, as kinetic energy increases, the motion of the molecules also increases.An increase in kinetic energy (and temperature) in a fluid leads to the separation of its constituent particles, thereby decreasing the density.In conclusion, when the temperature of a fluid increases, then the kinetic energy of the molecules INCREASES, the speed of the molecules INCREASES, the density of the fluid DECREASES, and the fluid RISES.
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What are two natural and two man-made causes for sudden catastrophic change to an ecosystem
Answer:
Some changes that can occur in ecosystems are seasons, tide cycles, population sizes, succession, evolution, landscape changes, and climate changes.
Explanation:
what type of energy is released when electric charge moves between the clouds and ground
Potassium and calcium are rarely found as pure elements in nature. They are usually combined with other substances. Explain why is this so.
Potassium and calcium are rarely found as pure elements in nature but are usually combined with other substances because of their high reactivity.
Reactivity of ElementsReactivity of elements refers to the ability of atoms of elements to gain or lose electrons in order to form bonds with other elements.
The most reactive elements are those of group 1, 2 and 7.
Group 1 elements are known as alkali metals and easily lose their one valence electrons to form ions.Because of their reactivity, they do not occur free in nature but in combined forma with other elements. Example is potassium.
Group 2 elements are known as the alkaline earth metals.They are very reactive as well and lose their two valence electrons easily to forms ions. Because of their reactivity, they do not occur free in nature but in combined forma with other elements. Example is calcium.
Therefore, potassium and calcium are rarely found as pure elements in nature but are usually combined with other substances because of their high reactivity.
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Heat can speed up the break down of compounds into two or more simpler substances. This is an example of which type of reaction?
A. synthesis
B. decomposition
C. reaction
D. combustion
Explain why calcium (Ca) has a greater atomic radius than magnesium (Mg).
Answer:
Magnesium nucleus will attract the electrons more toward it and therefore, shrinking the size of the atom. Magnesium atom is smaller than Calcium atom because Calcium has more electron ( 20e− ) which will occupy more energy levels ( n=4 for Calcium versus n=3 for Magnesium)
help me pleaseeee!!!
thissssssssssssss isssssssssssss B
Answer:
The bars and the gymnast's hands
Hope This Helps!
Why can't we say that acids react with all metals to produce hydrogen ?
Answer:
The more reactive the metal, the more rapid the reaction is. A metal below hydrogen in the reactivity series will not react with dilute acids.
Explanation:
Answer:
Explanation:
Usually when an acid reacts with metal, salt and hydrogen are produced. Acid + metal = salt + hydrogen. Example calcium nitrate + hydrogen. Hope this helps
PLEASE HELP PLEASE
Which of the following is a chemical property?
A: mass
B: oxidizes in air
C: boiling point
D: solubility
Answer:
Oxidizes in air
Explanation:
When water boils, it is still water, just in a different state. solubility and mass are not chemical properties because they don't involve chemical reactions or changing the identity of a substance.
Please mark brainliest!!! Thanks.
pls answer
What type of energy could be converted by using the stationary bikes? From ______ energy to _______ energy.
Answer:
Kinetic energy to Electrical energy.
Explanation:
When stationary bike is pedaled the wheels of the bike rotates which is a form of kinetic energy, this kinetic energy can be converted into electricity when connected to a generator.
From _Kinetic_ energy to _Electrical_ energy.
The depictions of ionic compounds do not show distinct compound units but rather a collection of ions in the ratio given by the formula. Explain how the drawing of NaCl both illustrates that the compound exists as a large collection of ions and that the ratio of sodium ions to chloride ions is 1-to-1 as indicated by the formula NaCl.
Answer:
The ionic compound NaCl has a Face Centered Cubic unit cell
The site for atoms are Face, center and Edges corner.
Effective number of atoms
Na+
1centers + 12edges x[tex]\frac{1}{4}[/tex] = 4 Na+
Cl-
6face x[tex]\frac{1}{2}[/tex] + [tex]\frac{1}{8}[/tex] x8 corners = 4Cl-
This is just one unit cell effective atom, there are thousand's of such unit cells are combined to form one such structure of NaCl. The real formula of NaCl is Na4Cl4 but for simplicity we use empirical formula that is NaCl.
Which structures do plant cells have for making food that animal cells do not?
mitochondria
vacuoles
lysosomes
chloroplasts
Answer:
Answer
Explanation:
The chloroplast. Animal cells DO NOT make their own food, while chloroplasts are needed in the plant cell to carry out photosynthesis.
Answer:
A Mitochondria is the power house of the cell, So it's not A.
vacuole is the water storage, So it's not B.
the lysosomes remove Waste, Cellular Debris, and foreign particles, So it's not C.
It's D chloroplast create food for the cell .
(Hope this helps :) )
Explanation:
SOMEONE HELP ME PLEASE ILL GIVE BRAINLY
Vinegar and baking soda fizzing is a
Change in temperature
Formation of gas/bubbles
Formation of precipitate
Release of energy (fire/light)
Change in color
Answer:
When you combine the solid (baking soda) and the liquid (vinegar), the chemical reaction creates a gas called carbon dioxide. Carbon dioxide is invisible, except as the bubbles of gas you may have noticed when the vinegar and baking soda mixture began to fizz.
Explanation:
what are drawn as arrows that are used to show both
size and direction.
Look at the image.
What does this image represent?
a) hydroxyl group
b) ether group
c) carbonyl group
d) amine group
Answer:
a carbonyl group
Explanation:
Functional group can be interconverted into each there by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound. The correct option is option D that is amine group.
What is functional group?A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry. Functional group determine the property of a compound.
The list of functional group are as follow:
Carboxylic group COOH
Alcoholic group OH
Ammine group R-NH₂
Ketonic group R-CO_R
Aldehydic group R-CHO
Thiol group R-S-H
Cyanide group -CN
The given image represent amine group.
Therefore the correct option is option D that is amine group.
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Why do you think the spacecraft’s speed was different on the Monday, Tuesday, and Wednesday launches?
Answer:
I think because Moving an object against a stronger magnetic force transfers more energy to the magnetic field. Magnetic forces
are stronger closer to magnets. The Wednesday test launch stored more potential energy, and launched the
spacecraft at a faster speed because the stronger magnetic field closer to the magnet resulted in a greater
increase in potential energy.
Explanation:
two products of the recharge process are calcium and magnesium chloride. Based on your knowledge of bonding and oxidation states (not based solely on the article), what are the chemical formulas for the products of the recharge process? Report you answer with the most likely oxidation state.
Answer: The chemical formulas of calcium and magnesium chloride are [tex]CaCl_2[/tex] and [tex]MgCl_2[/tex]
Explanation:
A chemical formula is the representation of a substance in terms of chemical symbols showing the elements present in a compound and their relative proportion.
Calcium is having an atomic number of 20 has electronic configuration of [tex]1s^22s^22p^63s^23p^64s^2[/tex]. It can lose two electrons to have an oxidation state of +2.
Magnesium is having an atomic number of 12 has electronic configuration of [tex]1s^22s^22p^63s^2[/tex]. It can lose two electrons to have an oxidation state of +2.
Chlorine is having an atomic number of 17 has electronic configuration of [tex]1s^22s^22p^63s^23p^5[/tex]. It can gain one electron to have an oxidation state of -1.
Thus the chemical formulas of calcium and magnesium chloride are [tex]CaCl_2[/tex] and [tex]MgCl_2[/tex]
Carbon has a half life of 5730 years, how many years would it take a 4 g sample to
decay to .5 g
Answer:
17190
Explanation:
half of 4 is 2 and half of 2 is 1 and half of 1 is .5 so you have now gone through 3 total half lives. Mulitply 5730 and 3.
Can someone tell me the answer and explanation plz
How do I find the Electrons of a substance? For example, there's like 10 protons & neutrons, how would I find the electrons? Please help ASAP!
Answer:the number of electrons is equal to the number of protons in a neutral atom that is. In a cation or anion atom you either gain or lose electrons. Let’s say it’s a cation +3 you lose 3 electrons. Now let’s say it’s an Anion -3 you gain 3 electrons. Hope this helps.
Explanation:
Calculate the amount of potential energy a 200 kg car has on top of a 15 m hill
Explanation:
Is this gravitational potential energy?
Will give brainliest (idk how to spell) ;-;
The atomic mass of one atom of an element is determined by the number of
protons only
protons and electrons
protons and neutrons
neutrons only
Answer:
#2 bro
Explanation:
Answer: protons and electrons
Explanation: :)
What phase is Nitrogen at 80K
Answer:
i believe its gas sorry if i am wrong
Explanation:
Otto and Olivia each have six markers. Otto is missing the purple and green markers, and
Olivia is missing the black and brown markers. What can they do so that each has a full set?
Answer:
Otto and Olivia should just buy more markers
Hi Jose, when you submit this form, the owner will be able to see your name and email address.
1. A 100. g samle of water absorbs how many Joules of energy as its temperature is changed from
35.0 C to 60.0 C. (water s = 4.184 J/g C)
Answer:
10460J
Explanation:
Given parameters:
Mass of water sample = 100g
Initial temperature = 35°C
Final temperature = 60°C
Unknown:
Amount of energy absorbed by water = ?
Solution:
The amount of energy absorbed by water is mathematically expressed below;
H = m C ΔT
H is the amount of energy
m is the mass
C is the specific heat capacity of water = 4.184J/g°C
ΔT = 60°C - 35°C = 25°C
Now insert the parameters and solve;
H = 100 x 4.184 x 25 = 10460J
The model of the atom that pictured the atom with electrons randomly distributed throughout the positively charged mass was known as the
Answer:
The cannonball model
Explanation:
Hope this helped!! :)
if motor bike travels 2.4 km in 5 min find it average velocity?
Answer:
28.8km/h
Explanation:
Change the 5min to hours.
=5/60 =0.0833hrs
Velocity= Distance /Time
2.4/0.0833
=28.8km/h
How many atoms are in 1.75 moles of neon?
Explanation:
it contains 6.02*1023atoms
Atom, the smallest unit of material which may be separated without releasing electrically charged. It is also the smallest unit of mass with the properties of a chemical element.
Avogadro's number is [tex]\bold{6.022\times 10^{23}}[/tex], which is the number of units in one mole of any material.Calculating of atoms are in 1.75 moles of neon:[tex]\to \bold{ 1.75 \times 6.022\times 10^{23}}\\\\\to \bold{ 10.5385 \times 10^{23}}\\\\[/tex]
Therefore, the answer is "[tex]10.5385 \times 10^{23}[/tex]".
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