Answer:
[tex]\huge\bf\underline{\underline{\pink{A}\orange{N}\red{S}\green{W}\purple{E}\blue{R}}}[/tex]
ONLY 20.95% IN THE AIR
:)
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what hypothesis is best for chemical reaction?
will give Brainliest
Answer:
If the reactants in the chemical reactions are known, then the products can be predicted because the pattern of the chemical reactions is being followed. The pattern for a single replacement is A + BC --> AC + B. This is like the Hear It Pop Chemical Reaction which is also an example of the single replacement.
Explanation:
A can of cola contains approximately 240 calories. If you consume two cans of cola each day for one week, approximately how many calories did you consume from cola?
Select one:
a. 3,400 calories
b. 70 calories
c. 1,700 calories
d. 480 calories
two or more atoms joined together form a _____
Answer:
It makes a molecule
Explanation:
The solubility of ZnCO3 in water is quite low. What could you add to increase the solubility? Explain fully how your method would work.
There is a way to decrease the concentration of an ion here. The carbonate ion happens to be easy to decrease. All we have to do is add some acid (say HCl) to the container. The following sequence of reactions explains how this WO r ks.
As long as more acid is added, this process will continue until all the solid Zn CO3 has been dissolved
What is the name of each labeled part?
Answer:
A - dendrites
B - cell body
C - axon terminal
D - myelin sheath
E - nucleus
Hope that helps.
A-dendrite
B-cell body
C-axon terminal
D-axon
E-nucleus
what everyday things turn green because acid
Which property or properties can change when the pressure of a gas changes?
Answer: This law states that the volume and temperature of a gas have a direct relationship: As temperature increases, volume increases, when pressure is held constant. Heating a gas increases the kinetic energy of the particles, causing the gas to expand
Explanation:
According to this law, a gas's volume and temperature are directly correlated: When pressure is held constant, volume rises as temperature rises. The kinetic energy of the particles in a gas increases when it is heated, which causes the gas to expand.
What rules apply to gases?According to Boyle's Law, when the temperature and mass are both constant, the volume of a given volume of gas sustained at a constant temperature varies inversely with the applied pressure.
The quantity of gas particles, the volume of the container, and the temperature of the gas all affect the pressure of a gas that is confined. The pressure will rise as the amount of gas particles in a container increases. The pressure will rise as a container's volume increases.
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PLEASE SOMEONE HELP ME ANSWER THIS!!!! i’m desperate:,,(
Answer:
See detailed solution below
Explanation:
Now, let us solve each question step by step.
1) Given that;
N = amount of radioactive material at time t
No= amount of radioactive material originally present
t = time required for N amount of radioactive material to remain
t1/2= half life of the radioactive material
So,
N/No = (1/2)^t/t1/2
N/60 = (1/2)^22.8/3.8
N/60= (1/2)^6
N/60=1/64
64 N = 60
N = 60/64
N = 0.9 g
2) N/No = (1/2)^t/t1/2
N/8 = (1/2)^103.2/34.4
N/8 = (1/2)^3
N/8 = 1/8
8N = 8
N = 1 L
3) N/No = (1/2)^t/t1/2
50/No = (1/2)^18/6
50/No = (1/2)^3
50/No = 1/8
No = 50 * 8
No = 400 micrograms
4) N/No = (1/2)^t/t1/2
62.5/500 = (1/2)^26/t1/2
0.125 = (1/2)^26/t1/2
Since 0.125 = 1/8
1/8 = (1/2)^26/t1/2
(1/2)^3 = (1/2)^26/t1/2
Hence;
3 = 26/t1/2
t1/2 = 26/3
t1/2 = 8.7 hours
What is Zeff of phosphorus
Answer:
Explanation:
Here is an illustration showing how to "calculate" +5 as the effective nuclear charge (Zeff) for phosphorus. We are not implying that the electrons are in orbits here, this is simply showing inner shell electrons that shield the outer valence electrons from the full nuclear charge.
We have that The effective nuclear charge Z_{eff} of 3p electron in phosphorus atom is discovered to be approximately 4.80
[tex]Z_{eff}=4.8[/tex]
It is important to note that the Z_{eff} of an element can be defined simply as the average positive charge felt by an shell electron in an atom from the various electrons around it
Hence
The effective nuclear charge Z_{eff} of 3p electron in phosphorus atom is discovered to be approximately 4.80
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Is the chemical reaction between magnesium metal and hydrochloric acid solution an acid base reaction?
Answer:
No
Explanation:
The chemical reaction between magnesium metal and hydrochloric acid solution is not an acid - base reaction.
An acid - base reaction involves an acid and base to produce salt and water.
This reaction is called a neutralization reaction. An acid is a substance that produces excess hydroxonium ions in solutions. A base produces excess hydroxyl ions in solution. When acids and base combines, the main product is a salt in water solution.manganese atom has 30 neutrons and atomic number 25
determine the electron cloud charge of manganese
Answer:
the most common oxidation no.of manganese is + 2 + 3 + 4 + 6 + 7
Choose two different particles found in the air. Explain how they are different and how they are the same
Answer:
Dust and smoke.
Explanation:
Dust and smoke are two different particles present in the air. Dust and smoke are different from one another due to their origin. Smoke formed from burning of materials while dust refers to the soil particles lifted by the wind due to their light weight. Dust and smoke are similar to each other due to their small in size, infinite number means uncountable and light weight.
Air is a mixture of gases and consists of dust particles and water vapor. It consists of small to very large size of particles. Some of them include dust pollen, soot, and liquid droplets.
Dust and soot particles of the air are different as the soot is a fine black particle of carbon and tar. It is made by the incomplete combustion of air. While dust is fine dry particles of matter.Hence they both differ.
Learn more about the two different particles found in the air.
brainly.in/question/35683807.
Part of an important cellular process involving a DNA strand is modeled below
12000
What is the purpose of this cellular process?
F Preserving genetic information for future generations
G Deleting the information in the sequence produced from the DNA template
# Transcribing information in the DNA sequence for use by the cell
J Producing more nucleotides for the DNA sequence
Answer: transcribing information to the dna sequence for use by the cell
Explanation:
2H2O2
1. Number of hydrogen atoms in chemical formula 1.
Answer:
А There are two peroxide molecules on the reactant side.
The statement is correct because the left hand side is the reactant side. We can read the reaction as;
2 molecules of hydrogen peroxide decomposed to given 1 molecule of oxygen gas and 2 molecules of water .
D Mass must be conserved so there are an equal number of molecules in the reactants and products.
E Mass must be conserved so there are an equal number of atoms in the reactants and products.
Since the chemical equation is balanced, choices D and E are correct. The reaction will have equal number of molecules and atoms on both sides of the expression.
Explanation:
PLEASE ILL GIVE YOU BRAINLY
What prevents charge buildup in a galvanic cell?
A. An electrolyte
B. A salt bridge
C. An electrode
D. A battery
Answer:
B is the answer
Explanation:
A salt bridge is necessary to keep the charge flowing through the cell. Without a salt bridge, the electrons produced at the anode would build up at the cathode and the reaction would stop running.
How many atoms are in HCOOH₂?
Answer:
11 atoms I think
Explanation:
Answer: 3
Explanation:
I took the test!!
A bus travels 20km in 30 min what is the average speed of the bus
Answer:
40km/h
Explanation:
v=20km/0.5h=40km/h.
Answer:
average speed=distance/time
speed=20/30
speed=2/3
A solution is
Question 6 options:
a homogeneous mixture.
a compound.
chemically separable.
a heterogeneous mixture.
Answer:
the first one. a homogeneous mixture.
Explanation:
hope this helps :)
What would happen if a neutron was added to Lithium (7)
Answer:
if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8
how many grams of solid silver nitrate would you need to prepare 200.0 mL of a 0.150 M AgNO3 solution
How do we get heat from the sun?
Answer:
When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.
Explanation:
Answer:
The sun radiates energy in all directions. Most of it dissipates into space, but the tiny fraction of the sun's energy that reaches Earth is enough to heat the planet and drive the global weather system by warming the atmosphere and oceans. The delicate balance between the amount of heat Earth receives from the sun and the heat that Earth radiates back into space makes it possible for the planet to sustain life.
Hopefully, this helps you out!
Cannot be chemically broken down into simpler substances
An element is the simplest form of matter that has a unique set of properties. Elements cannot be broken down into a simpler substance. Likewise, one element cannot be chemically converted into a different element.
HOPE THIS HELPS
Answer:
element
Explanation:
Because
Can someone please help me out
Answer:
a. increases
b. increases
c. decreases
8. Draw the structural formula for isoprene (the building block of rubber). It should satisfy the molecular formula for isoprene of C5H8.
plz i need help
Here are two options use the one you need :)
What is the kinetic energy of 3500 kg bus that is moving at 25 m/s
Answer:
1093750 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
v is the velocity
m is the mass
From the question we have
[tex]k = \frac{1}{2} \times 3500 \times {25}^{2} \\ = 1750 \times 625 \\ = 1093750 \: \: \: \: \: [/tex]
We have the final answer as
1,093,750 JHope this helps you
A positive ion is —————-than its parent atom?
Answer:
positive ions are smaller than their parent atoms and negative ions are larger than their parent atoms.
A recipe calls for 0.8 oz of cheese. If I make 35 batches of this recipe, how many ounces of cheese do I need?
Some of the energy given off by the sun is in the form of _________ and ________energy
Answer:
All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays.
Explanation:
Use the graph to determine the instantaneous speed at 2 seconds.
What is the average speed over the entire trip?
Answer:
The instantaneous speed at 2 seconds =
3 m/s
The average speed over the entire trip is
2 m/s
Explanation:
Answer above is wrong and doesn't state anything about the answer, so this is the correct answer hope this helped! :)
Answer:
1.) 3 m/s 2.) 2 m/s
Explanation:
I hope this helps!!
the transfer of energy by waves is also known as _______
Answer:
wave
Explanation:
'Wave' is a common term for a number of different ways in which energy is transferred: In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields.
i hope this helps and your welcom