Answer:
3ppt is the relative error of the method
Explanation:
The relative error is a measurement used to determine the accuracy of your experiment, the equation to find the value in parts per thousand is:
Error = |True Value - Observed Value| / True Value * 1000
Where True value is 23.24%
And Observed value is 23.17%
Replacing:
Error = |23.24% - 23.17%| / 23.24% * 1000
Error =
3ppt is the relative error of the methodHow do you balance 3CaCl2+3Na(PO4)=Ca3(PO4)2+6NaCl
Answer:
[tex]3CaCl_2+2Na_3PO_4\rightarrow Ca_3(PO_4)_2+6NaCl[/tex]
Explanation:
Hey there!
In this case, according to the law of conservation of mass, it possible to balance the following reaction:
[tex]CaCl_2+Na_3PO_4\rightarrow Ca_3(PO_4)_2+NaCl[/tex]
By adding a 3 on CaCl2, a 2 on Na3PO4 and a 6 on NaCl in order to equal the atoms of calcium, chlorine, sodium, phosphorous and oxygen, as follows:
[tex]3CaCl_2+2Na_3PO_4\rightarrow Ca_3(PO_4)_2+6NaCl[/tex]
Best regards!
What type of reaction is this? Pb + 2NaCl → PbCl2 + 2Na
I'm having with chemistry assignments I need a help
Answer:
the question please? illl help
HNO3 + NaOH → NaNO3 + H2O
Answer:
Explanation: what is the question?
This is a neutralisation reaction.
What type of consumer eats only producers?
Answer: Primary consumers make up the second trophic level. They are also called herbivores. They eat primary producers—plants or algae—and nothing else. For example, a grasshopper living in the Everglades is a primary consumer
Answer:
primary consumer make up the second trophic level .they are also herbivores they eat primary consumer plants or alger and nothing else .for example a grasshopper living in the everglades is a primary consumer
A(n) _________ is an atom or a group of atoms with either a positive or negative charge
O compound
O ion
O molecule
O nucleus
Answer:
the answer is ion..
hope it helps..
Explain the difference between an exothermic and an endothermic reaction.
Answer:
Explanation:
Heat is a reactant.
If the equation requires heat to occur, the reaction is endothermic
The equation would have this model
A + B + heat =====> C + D
If the equation gives away heat, then it is exothermic
The equation would look like this. (I'll use a common reaction)
CH4 + 2O2 - heat ===> CO2 + 2H2O
The heat is minus when it has to be given away.
explain the significance
Answer:
Dictionary
Definitions from Oxford Languages
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significance
/sɪɡˈnɪfɪk(ə)ns/
Learn to pronounce
noun
1.
the quality of being worthy of attention; importance.
"adolescent education was felt to be a social issue of some significance"
Similar:
importance
import
noteworthiness
consequence
substance
seriousness
gravity
weight
weightiness
magnitude
moment
momentousness
memorableness
unforgettableness
pronounced nature
remarkableness
outstanding nature
markedness
obviousness
conspicuousness
strikingness
distinction
impressiveness
uncommonness
unusualness
rarity
extraordinariness
exceptionalness
specialness
cruciality
Opposite:
insignificance
2.
the meaning to be found in words or events.
"the significance of what was happening was clearer to me than to her"
Similar:
meaning
sense
signification
import
thrust
drift
gist
burden
theme
implication
tenor
message
essence
substance
relevance
When the rate of the forward reaction equals the rate of the backward reaction, the system is said to be in (2 points)
a. reverse
b. dynamic equilibrium
c. homeostasis
d. suspended state
Answer:
I believe b, dynamic equilibrium
Explanation:
This part of the wind turbine converts the mechanical energy of the rotor/shaft captured from the wind into_________ energy
O mechanical
O potential
O electrical
O nuclear
electrical energy would be the right answer.
Explanation:
How saliva works as a buffering agent?
Answer:
The carbonic acid/bicarbonate buffer is the major buffer in stimulated saliva, with bicarbonate acting mainly to neutralize acids produced by bacteria when they digest sugars in the mouth or acids from the stomach. The concentration of the bicarbonate ion depends largely on the salivary flow rate.
Explanation:
Basta Yan sagut ko eh
Answer:
The carbonic acid/bicarbonate buffer is the major buffer in stimulated saliva, with bicarbonate acting mainly to neutralize acids produced by bacteria when they digest sugars in the mouth or acids from the stomach. The concentration of the bicarbonate ion depends largely on the salivary flow rate
Explanation:
A ________________________ can be at the top of a food chain.
Answer:
ap.ex predat0rs
Explanation:
The nature particle model of matter describe the property of solid, liquid and gas in molecular level. Which of the given statements below is TRUE?
A. Matter is made up of large particles.
B. Particles of matter have spaces between them.
C. Particles of matter are not moving all the time.
D. The particles of matter do not attract each other.
Answer:
B. Particles of matter have spaces between them.
Explanation:
The particle nature model of matter is an model used to explain the properties and nature of matter. The statements of the particle nature model of matter are as follows :
1. Matter is made of small particles of atoms or molecules.
2. The particles of matter have space between them. The spaces between the particles are least in solids as they are closely packed together but are greatest in gases whose particles are far apart from each other.
3. The particles of matter are in constant motion at all times. Solids particles are not free to move due to strong molecular forces between the particles, but are constantly vibrating in their mean positions. Liquid particles free to move due to lesser molecular forces while gas molecules which have negligible intermolecular forces have the greatest ability to move.
4. The particles of matter are attracted to each other by intermolecular forces. These forces are greatest in solids and least in gases.
The correct option is B.
Only animals and not plants can adapt to their environment true or false
Answer:
true
Explanation:
np have a good day brainliest?
When Thomas Edison first sold electricity, he used zinc coulometers to measure charge consumption. (In a coulometer the cathode is weighed before a current is passed through it, and then again after the passage of current. The weight increase is proportional to the amount of current that flows through the cathode.) If the zinc plate in one of Edison's coulometers increased in mass by 14.47 g, how much charge had passed through it
Answer:
The answer is "[tex]42537.93 \ C[/tex]".
Explanation:
Molar mass : [tex]Z_n = 65.38 \ \frac{g}{mol}\\\\[/tex]
[tex]\to Zn^{2+} + 2e^{-} = Zn\\\\[/tex]
[tex]\therefore\\\\ \to 65.38 \ g \ of\ Z_n \ require: \\\\ \to 2 \times 96500\ C\\\\\to 14.41 \ g\ require,\\\\ \to \frac{(14.41 \times 2 \times 96500)}{65.38} \ \frac{g}{mol} = 42537.93 \ C[/tex]
Calculate the frequency of a light wave that has a wavelength of 9.2dm.
Dawn is comparing how different animals move and the structures they use to move. She made the table shown below.
Animal Method of movement Structures used for movement
panther walks legs and feet
parrot flies wings
shark swims
Which structure completes the table for the shark?
eyes and brain
skin and scales
tail and fins
teeth and jaws
Answer:
tail and fins
Explatanation:
;_; help please i need help TwT
Answer:
it's a day I think so ........
Answer:
Lunar cycle
Explanation:
Year is the amount of time for the Earth to rotate a complete circle around the sun.
Lunar cycle (moon phases) is the rotation of the Moon around the Earth.
Day is the time for the Earth to rotate on its own axis completely.
Solar cycle is the changes that the sun's electric field goes through about every 11 years.
Jacob is doing a report on the galaxy in which Earth is found. Which of the following is the galaxy that Jacob should research for his report?
Andromeda
Milky Way
Maffei 1
Ursa Minor
Answer:
milky way
Explanation:
Which letter in the rock cycle diagram represents metamorphic rock?
A)
A.
B)
B.
)
D.
D)
E.
Answer:
B.Explanation:
Hopes this helps. Mark as brainlest plz!Answer:
b
Explanation:
learned this in science class
why are ionic compound soluble in water
Answer:
Most ionic compounds are soluble in water. Polar water molecules have a strong attraction for charged ions and the charged ions become solvated as they dissociate into water and ionic compounds are soluble in water.
Which of the following is a homogenous mixture?
A. chicken noodle soup
B. Kool-Aid
C. water
Answer:
Kool- aid
Explanation:
because it is the same throughout and can be seperated
Answer:
C. water
Explanation:
What is the function of an atoms nucleus?
1. It holds protons and
neutrons
2. It contains electrons
3.it communicates with other atoms
4.none and above
Answer:
The answer to the question is A. :)
The correct answer is Option A.
Protons and neutrons are found in the nucleus.
Explain about atoms nucleus?An atom is a complex configuration of negatively charged electrons arranged around a positively charged nucleus in predetermined shells. Electrically positive protons and electrically neutral neutrons make up atomic nuclei. The strongest fundamental force known to science, also known as the strong force, holds these things together. The nucleus typically makes up more than 99.9% of the atom's mass but much less than.01 percent of its volume.Although protons and neutrons are similar in mass, protons have one unit of positive charge (+ e), while neutrons have no charge. The center of an atom is where all of these particles are crammed into a very small area.The force needed to keep an atom together and in place is produced by the atom's nucleus.To learn more about atoms nucleus refer to :
https://brainly.com/question/1268608
#SPJ2
How many moles is 1.80 * 10^24 molecules of H2O?
Answer:
3.0 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{1.8 \times {10}^{24} }{6.02 \times {10}^{23} } = 2.990.. \\ [/tex]
We have the final answer as
3.0 molesHope this helps you
Which compound will be the most soluble in water?
a) CH3CH2CH2CH2CH3
b) CH3CH2CH2CH2OH
c) HOCH2CH2CH2OH
d) CH3CH2CH2OCH3
Answer:
c) HOCH2CH2CH2OH
Explanation:
Hope this helps
What is the energy of the reactants?
k]
What is the energy of the products?
k]
What is the activation energy of the forward reaction?
k]
What is the activation energy of the reverse reaction?
k]
What the energy of the forward reaction?
k]
What is the energy of the reverse reaction?
Is the forward reaction endothermic or exothermic?
Is the reverse reaction endothermic or exothermic?
Answer:
1. The energy of the reactant is 50 KJ
2. The energy of the product is 100 KJ
3. The activation energy of the forward reaction is 200 KJ.
4. The activation energy of the reverse reaction is 150 KJ.
5. The energy of the forward reaction is +50 KJ
6. The energy of the reverse reaction is –50 KJ
7. Endothermic reaction
8. Exothermic reaction
Explanation:
1. Determination of the energy of reactant.
From the diagram given above, the energy of the reactant is 50 KJ
2. Determination of the energy of product.
From the diagram given above, the energy of the product is 100 KJ.
3. Determination of the activation energy of the forward reaction.
The activation energy is the energy between the reactant and the peak. It can be obtained as follow:
Energy of reactant (Eᵣ) = 50 KJ
Energy at the peak (Eₕ) = 250 KJ
Activation energy (Eₐ) =?
Eₐ = Eₕ – Eᵣ
Eₐ = 250 – 50
Eₐ = 200 KJ
Thus, the activation energy of the forward reaction is 200 KJ
4. Determination of the activation energy of the reverse reaction.
Energy of reactant (Eᵣ) = 100 KJ
Energy at the peak (Eₕ) = 250 KJ
Activation energy (Eₐ) =?
Eₐ = Eₕ – Eᵣ
Eₐ = 250 – 100
Eₐ = 150 KJ
Thus, the activation energy of the reverse reaction is 150 KJ
5. Determination of the energy of the forward reaction.
Energy of reactant (Eᵣ) = 50 KJ
Energy of product (Eₚ) = 100 KJ
Enthalpy change (ΔH) =?
ΔH = Eₚ – Eᵣ
ΔH = 100 – 50
ΔH = +50 KJ
Thus, the energy of the forward reaction is +50 KJ
6. Determination of the energy of the reverse reaction.
Energy of reactant (Eᵣ) = 100 KJ
Energy of product (Eₚ) = 50 KJ
Enthalpy change (ΔH) =?
ΔH = Eₚ – Eᵣ
ΔH = 50 – 100
ΔH = –50 KJ
Thus, the energy of the reverse reaction is –50 KJ
7. The forward reaction is endothermic reaction because the energy of the product is higher than the energy of the reactant which leads to positive energy of the forward reaction (+50 KJ).
8. The reverse reaction is exothermic reaction because the energy of the product is lesser than the energy of the reactant which leads to negative energy of the reverse reaction (–50 KJ). In a nut shell, we can say that the energy of the reverse reaction is exothermic because its energy of reaction is –50 KJ.
Balance the following equations:
1) C2H402+_02->_C02+ _H20
2) V205+ _CaS→_Ca0+ V2S5
3) S8+_O2->_SO2
Answer:
1) 0 C2H4O2 + 0 O2 -> 0 CO2 + 0 H2O (balanced)
2) V2O5 + CaS -> CaO + V2S5
just additional info: V2O5 is divanadium pentaoxide
LHS (Left hand side)
V: 2
O: 5
Ca: 1
S: 1 x 5 [to balance with the right hand side of the equation]
RHS (Right hand side)
V: 2
O: 1 x 5 [to balance with the left hand side of the equation]
Ca: 1
S: 5
When you balance any elements, you have to balance the whole chemical compound.
Thus,
V2O5 + 5 CaS -> 5 CaO + V2S5
LHS CHECK:
V: 2
O: 5
Ca: 5
S: 5
RHS CHECK:
V: 2
O: 5
Ca: 5
S: 5
3) S8 + O2 -> SO2
LHS:
S: 8
O: 2
RHS:
S: 1 x 8 [to balance with LHS]
O: 2
When you balance any elements, you have to balance the whole chemical compound.
S8 + O2 -> 8 SO2
When we add 8 to the RHS, it gives us 8S, 16 O.
In order to balance that into the RHS, I need to multiply the O2 by 8, which will give 8(O2) = 16 O particles.
Therefore, S8 + 8 O2 -> 8 SO2 is the final answer for (3).
3. How many oxygen atoms are there in 5.0 mol of water?
Answer:
3.01 * 10^23 oxygen atoms
Explanation:
Water is H2O. So there are one oxygen atom for every molecule of water.
So in 5.0 mol of water molecules, there are 5.0 mol of oxygen atoms.
Since 5.0 mol = 5 * 6.02 * 10^23 molecules, there are 3.01 * 10^23 oxygen atoms.
Why should you prefer dry-ashing to wet-ashing of a food sample such as cabbage?
Answer:
The work was to demonstrate a repaid, precise and accurate determination method for ten trace elements (Al, Cd, Cr, Cu, Fe, Mg, Mn, Ni, Se and Zn) in periostracum serpentis (PS) and periostracum cicadae (PC) by inductively coupled plasma atomic emission spectrometry (ICP-AES). In order to evaluate the best digestion method, three different sample digestion methods including dry ashing, wet ashing and microwave digestion procedures were compared in this study.
Explanation:
How is neutrophilia defined?