Answer:
the answer is D (つ°ヮ°)つ （＾ω＾）
In which classification of matter are the components chemically combined?
A metal
B compound
C mixture
D Metalloids
_______ are events that disrupt the stability of a whole ecosystem.
A.Resources
B.Disturbances
C.Species
Will give brainliest
Process name of water vapor to ice
Answer:
Deposition
this is the process of a substance changing its state from gas to solid. Solid to gas is known as sublimation
The atoms of which element bond to one another in chains, rings, and networks?
1.
barium
2.
carbon
3.
iodine
4.
mercury
Submit An:
9. Which of the following is a nucleotide found in DNA?
1
O
deoxyribose sugar, phosphate, nitrogenous base
ribose sugar, amino acid, nitrogenous base
ribose sugar, phosphate, nitrogenous base
deoxyribose sugar, amino acid, nitrogenous base
I HAVE 5 MINUTES LEFT ON THIS TEST PLEASE HELP
Mr. Marcum is a research chemist who is testing a sample to determine its properties. He moved the sample from one container to another.
sample kept the same volume, but its shape changed. From the behavior of the sample, Mr. Marcum knows that the particles that make up
sample touch each other but are free to slide by each other. What is the state of this sample?
O
A gas
O
B.liquid
C. plasma
D. Solid
Answer:
liquid
Explanation:
_ As + _ NaOH → _Na3AsO3 + _H2
How many moles of oxygen gas are consumed in the production of 5.00 g of iron(III) oxide from metallic iron? 4Fe(s)+3O2(g)→2Fe2O3(g) _____ mole(s) O2
Answer:
0.0469 mol of 02.
Explanation:
The balanced equation of this reaction is given as follows:
4Fe(s) + 3O2(g) → 2Fe2O3(s)
According to this equation, 3 moles of oxygen gas (O2) is consumed to produce 2 moles of iron(III) oxide (Fe2O3).
Using the formula, mole = mass/molar mass to convert mass of Fe2O3 to mole
Molar mass of Fe2O3 = 56(2) + 16(3)
= 112 + 48
= 160g/mol
mole = 5.00 g ÷ 160g/mol
mole = 0.03125mol of Fe2O3
Since 3 moles of oxygen gas (O2) is consumed to produce 2 moles of iron(III) oxide (Fe2O3).
0.03125mol of Fe2O3 will be produced when (0.03125 × 3/2) mol of oxygen gas is consumed.
0.03125 × 3/2
0.03125 × 1.5
= 0.0469 mol of 02.
PLEASE HELP WILL GIVE LOTS OF POINTS!!!!!!!!!!!! What is the daughter particle if Uranium -234 undergoes beta decay? Write your answer in isotopic notation.
Answer:
Given nuclide is uranium-234.
If it undergoes beta decay then, what will be the daughter particle?
Explanation:
The beta particle decay increases the atomic number of the nuclide by one.
There is no change in the mass number of the nuclide.
The decay of beta particle from Uranium-234 is shown below:
It forms Np-93.
What is the volume of .750 M hydrochloride acid required to react completely with 25.00 mL of .290 M NaOH solution?
from
HCl + NaOH----> NaCl +H2O
n of acid=1
n of base=1
Molarity of acid=750M
Molarity of base=290M
volume of base=25ml
from
Va=Mb ×vb×na
Ma×nb
Va=290×25×1
750×1
Va=7250
750
Va=9.67ml
The volume of .750 M hydrochloride acid is required to react completely with 25.00 mL of .290 M NaOH solution is 9.67ml
HCl + NaOH----> NaCl +H2O
n of acid=1
n of base=1
Molarity of acid=750M
Molarity of base=290M
volume of base=25ml
Therefore,
Va=Mb ×vb×na
Ma×nb
Va=290×25×1
750×1
Va=7250
750
Hence,
Va=9.67ml
What is Hydrochloric acid?
Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctively pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans. Hydrochloric acid is an important laboratory reagent and industrial chemical.
Learn more about Hydrochloric acid
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how many moles of H2 are required to make 10 moles of water?
Explanation:
10 moles h20 is required
10 moles of H₂ are required to make 10 moles of H₂O.
What is Stoichiometry ?Stoichiometry is an important concept which helps us use the balanced chemical equation to measures the amount of reactants and products.
What is Balanced Chemical equation ?A balanced chemical equation is chemical equation that has equal number of atoms on both sides of arrow that is reactant and product.
First we have to write the Balanced chemical equation
2H₂ + O₂ → 2H₂O
To produce 2 moles of water, 2 moles of hydrogen are required to produce 10 moles of water.
So,
[tex]\frac{2\ \text{moles of}\ H_2}{2\ \text{moles of}\ H_2O}[/tex] × 10 moles of H₂O
= 10 moles of hydrogen are required.
Thus, from above conclusion we can say that 10 moles of H₂ are required to make 10 moles of H₂O.
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Please help! I don't know how to do and want to understand
At which of the four labeled points on the titration curve below do you expect to find the highest concentration of hydroxide
ions?
A
B
C
D
Answer:
D.
Explanation:
Hydroxide ions are produced when acid reacts with a base under a Ph value of more than 7. Hydroxide ions are negatively charged ions which are released in the aqueous solution during titration process. It a oxygen and hydrogen atom covalent bond.
Compound
a)magnesium+carbon+oxygen
b)copper+sultry+oxygen
c)barium+nitrogen+oxygen
Copper(II) sulfate is an active ingredient in tree stump remover. In order to help remove
a tree that was causing foundational damage to a school, a chemistry student soaked
the roots with copper(ll) sulfate. The removed tree was later dried and used as
firewood. Assuming the copper(II) sulfate is present in the wood, what color would be
observed in the fire?
Answer:
the tree red
Explanation:
Copper (II) substances burn to produce bluish-green flames.
Flame test for copper (II)The copper (II) present in the wood will make the flame produce a bluish-green color.
This is because copper (II) compounds are known to produce flame colors that range from blue to bluish-green when tested in the laboratory.
This is because the electrons in the atoms of copper lose energy and drop to lower energy, releasing the lost energy as light in the process.
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i need help asap plzz i will give 100 points
Answer:
u can g00gle it , just copy nd paste its all there. hope this helps
Explanation:
Match the following quantities
-
6.02 x 1023 atoms of Al
-
1 molecule of N2O
-
6.02 x 1023 molecules of C2H4
-
1 atom of Au
A.
28.05 g
B.
26.98 g
C.
44.01 u
D.
196.97 u
Answer:
C.44.01 u
Explanation:
basta ayan yong answer ko
What are the names of those?
Answer:
formula tree
Explanation:
HELPPPP pleaseeeeee!!!!
Answer:
Length=Meter
Mass=Kilogram
Time=Second
Explanation:
Si is the International System of Units and means not just the U.S metric system.
Hope this helps and Please mark as Brainliest
Number of molecules in 16 grams of h2co3
For this one u can work out the amount of moles in h2co3 by using moles=mass/mr(of h2co3 is 52)
so 16/62=0.258moles then u use the equation
number of particle = moles × 6.02×10^23
=0.258×6.02 ×10^23
=1.55×10^23 molecules.
hope this helps
The pH of a solution with a [OH-] of 1x10^-6 is
Answer:
pH = 6
Explanation:
Given that,
The concentration of [OH]⁻ ion is [tex]10^{-6}[/tex].
We need to find the pH of the solution.
We know that,
[tex]pH=-\log[OH]^-[/tex]
Put all the values,
[tex]pH=-\log(10^{-6})\\\\pH=6[/tex]
Hence, the pH of the solution is 6.
Let's start by figuring out the amount in miles. From there, we can easily find the equivalent mass. Which equation do we need to find out how many moles of NH4Cl would there be in 500 mL of a 0.300 M solution of it?
A. n=C x V
B. C=V x n
C. C=n x V
D. n=C / V
Answer:
A. n= C x V
Explanation:
Molarity of a solution is the molar concentration of that solution. It can be calculated using the formula:
M = n/V
Where;
M = molarity (M)
n = number of moles (n)
V = volume (mL)
To calculate the number of moles from a given molarity value and volume, we say:
n = M × V
For this case of NH4Cl;
V = 500mL = 500/1000 = 0.5L
M = 0.300 M
n = 0.300 × 0.5
n = 0.15moles
Answer: n=CxV
Explanation:
Why nitration of benzene is easier than that of benzene......... And how is phenol converted to TNT
Answer:
The nitration of phenol is easier than that of benzene because benzene has delocalised pie-electrons which makes it more stable than phenol.
Phenol is converted to Trinitrotoluene by adding zinc dust to remove the hydroxyl group, then reacted with Aluminium oxide followed by haloalkane.
Part C
For each source of energy, describe its strengths and weaknesses with respect to the ideal source you described in part A. Do Internet research, as needed, to describe each energy source.
Question 1
Describe at least two advantages and two disadvantages of using natural gas as a source of energy.
Answer:
See explanation
Explanation:
Natural gas is mined along with crude oil in many oil wells. It has the advantage of being a cheap fossil fuels which is easily obtainable.
Generally, natural gas is the cleanest of all the fossil fuels. This means that it is the fossil fuel that least contributes to environmental pollution.
On the other hand; natural gas produces some amount of sulphur as it is burnt and mercury as particulate matter. These substances are quite dangerous to health.
Secondly, the combustion of natural gas leads to the production of the oxides of nitrogen which play a key role in the occurrence of photochemical smog.
An apple has been left out, and it is starting to rot. Which of the following is the best method to slow down the chemical changes that are occurring?
The best method is to keep rinsing the apple with water every hour.
The best method is to keep the apple in a cooler place.
The best method is to put the apple in the sun to warm it up.
The best method is to wrap the apple in plastic.
What chemical reaction happens when water breaks down into hydrogen and oxygen
Answer:
bldg licking no-good also
Answer:
Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy, based on green hydrogen.
How many molecules of oxygen are in the cylinder
Answer:
A gas cylinder contains exactly 15 moles of oxygen gas (02)
the act of salt and sugar dissapering in water is called
Answer:
dissolving
Explanation:
Answer:
dissoliving
Explanation:
salt and sugar are both soluble
If the power source in a motor was to be replaced with an electrical load, and the armature was turned by hand, then what device have you made?
Answer:
This question doesnt make much sense but ill try to answer it.
A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electricity. If the shaft of a DC motor is turned by an external force, the motor will act as a generator. DC Motor rotation does have to do with the voltage polarity and the direction of the current flow.
True or false:
The following equation is balanced properly: 6CO2 + 6H2O → C6H12O6 + O2