answer :
b because 24 <3
Explanation:
hdjsna surveyed I need points lol sorry for wasting time
Balance the equations below (if no coefficient is needed, choose "1" from the options)
1.__K(s) +__ Cl2(g) →__KCI(s)
2. __NH3(g)→__N2(g) +__ H2(g)
3. __Ag(NO3) (aq) +__CaCl2(aq) →__AGCL(s) + __Ca(NO3)2(aq)
4. __CH4(g)+__O₂(g) → __CO2(g)+ __H₂0(g)
Answer:
1. 2K(s) + Cl2(g) → 2KCI(s)
2. 4NH3(g) → 2N2(g) + 6H2(g)
3. 2AgNO3(aq) + CaCl2(aq) → 2AgCl(s) + Ca(NO3)2(aq)
4. CH4(g) + 2O₂(g) → CO2(g) + 2H₂0(g)
When 200g of AgNO3 solution mixes with 150 g of NaI solution, 2.93 g of AgI precipitates, and the temperature of the solution rises by 1.34oC. Assume 350 g of solution and a specific heat capacity of 4.184 J/g•oC. Calculate H for the following: Ag+(aq) + I- (aq) → AgI(s)
Answer:
\(\Delta H=1962.3J\)
Explanation:
Hello,
In this case, we can compute the change in the solution enthalpy by using the following formula:
\(\Delta H=mC\Delta T\)
Whereas the mass of the solution is 350 g, the specific heat capacity is 4.184 J/g °C and the change in the temperature is 1.34 °C, therefore, we obtain:
\(\Delta H=350g*4.184\frac{J}{g\°C} *1.34\°C\\\\\Delta H=1962.3J\)
It is important to notice that the mass is just 350 g that is the reacting amount and by means of the law of the conservation of mass, the total mass will remain constant, for that reason we compute the change in the enthalpy as shown above, which is positive due to the temperature raise.
Best regards.
how would you confirm the presence of lead in an ore?
There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.
The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.
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which of these is inorganic 1) leaf 2) earthworms 3) minerals 4) bacteria
Answer:
Bacteria
Explanation:
How many ml of 0.213-M Na3PO4 are required to deliver 66.4 mmol Na1+ ions?
Given :
Molarity of \(Na_3PO_4\) , M = 0.213 M .
To Find :
How many ml of 0.213 M of \(Na_3PO_4\) are required to deliver 66.4 mmol \(Na^+\).
Solution :
Volume required :
\(V=[\text{ 66.4 mmol of }Na^+] + [\dfrac{\text{1 mm of }Na_3PO_4}{\text{3 mmol of }Na^+}]+[\dfrac{\text{1 ml }Na_3PO_4}{\text{0.213 mmol of }Na_3PO_4}]\)
So ,
\(V=\dfrac{66.4}{3\times 0.213}\ ml\\\\V=103.91\ ml\)
Therefore , volume of \(Na_3PO_4\) required is 103.91 ml .
Hence , this is the required solution .
A person has $4000to invest. Part of the money is to be placed in a certificate of deposit paying %, per year. The rest is to be placed in corporate bonds paying %, per year. If he wishes to obtain an overall return of % per year, how much should be placed in each investment?
Answer:
Let x = amount invested in certificate of deposit (in dollars)
Let y = amount invested in corporate bonds (in dollars)
Total amount invested = $100: x + y = 100
CD pays 2% per year, corporate bonds pay 4% per year, total return is 3% per year
Total return on investments = 3% of $100 = $3: 0.02x + 0.04y = 3
Simplifying the equations:
x + y = 100
2x + 4y = 300
Solving for x:
x + y = 100
x = 50
Therefore, the person should invest $50 in the certificate of deposit and $50 in corporate bonds to obtain an overall return of 3% per year.
Explanation:
What are the correct coefficients when this equation is balanced?
S+ O₂ → SO3
a. 2, 3, 2
b. 2, 6, 2
c. 1, 3, 2
d. 2, 1, 1
The correct coefficients for balancing the equation S + O₂ → SO₃ are: 2, 6, 2.option b.
In order to balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's break down the elements in the equation:
On the left side, we have:
- Sulfur (S): 1 atom
- Oxygen (O): 2 atoms
On the right side, we have:
- Sulfur (S): 1 atom
- Oxygen (O): 3 atoms
To balance the sulfur atoms, we need 2 molecules of SO₃ on the right side. This gives us:
- Sulfur (S): 2 atoms
- Oxygen (O): 6 atoms
Now, both sides have the same number of sulfur and oxygen atoms. Therefore, the balanced equation is: 2S + 3O₂ → 2SO₃. The correct coefficients are: 2, 6, 2, which corresponds to option b.
By multiplying the sulfur (S) coefficient by 2, we balance the sulfur atoms. Then, by multiplying the oxygen (O₂) coefficient by 3, we ensure that both sides have the same number of oxygen atoms.
The resulting coefficients are 2S + 3O₂ → 2SO₃. This balanced equation follows the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction.option b.
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Write a balanced chemical equation for the following reaction in an acidic solution: Copper metal reacts with aqueous nitric acid to form aqueous copper (II) nitrate, liquid water and gaseous nitrogen monoxide.
Answer:
Cu(s) + 4HNO₃(aq) -> Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)
Use your data, the equation to the right, and the specific heat of water (4.184 J/g C) to compute the specific heat values of each metal. Use a calculator and round to the nearest hundredth place.
The heat capacity for the metals are;
Aluminum - 0.89
Copper - 0.11
Iron - 0.44
Lead - 0.12
What is the specific heat?The specific heat of a substance is denoted by the symbol "C" and is typically measured in units of J/g·°C (joules per gram per degree Celsius) or cal/g·°C (calories per gram per degree Celsius).
The specific h
We have that;
For Aluminum;
c = 4.184 * 39.85 * 4.7/11.98 * 72.9
= 783.6/873.3
= 0.89
For Copper;
c = 4.184 * 12.14 * 1.9/12.14 * 75.4
= 96.5/915.3
= 0.11
For Iron
c = 4.184 * 40.24 * 2.4/12.31 * 75.1
= 404.1/924.5
= 0.44
For Lead
c = 4.184 * 39.65 * 0.7/12.46 * 76.7
c = 116.1/955.68
= 0.12
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Which component of the steam sterilizer is the coolest?
Answer:
Thermostatic valve
Explanation:
"Is located in the drain line; the drain and the area surrounding it are the coolest areas in the sterilizer. A sensor in the chamber drain measures steam temperature and automatically controls the flow of air and condensate from the sterilizing chamber."
Hope this helps
Because a gas has no definite volume or shape, in what way does it take up space? (2 points)
Group of answer choices
By taking the volume of a solid
By taking the volume of a liquid
By taking the shape of its container
By taking the volume of its container
Answer:
By taking the volume of the container.
Answer:
By taking the volume of the container
Explanation:
it does not have any specific volume or shape, so the way it volume is the volume of container.
PPPPLLLLEEEZZZZZ GIVE ME BRAINLIEST!!!!
Classify each element.
A material that has been treated, pοlished, οr brοken recently has a shiny appearance and is excellent at transferring heat and electricity. Metal is the name. Metals are typically flexible and ductile.
What dοes ductile mean tο yοu?A material's ductility is its capacity tο withstand being hammered thin οr stretched intο wire withοut breaking.
In: Pοst-transitiοn metals include indium. At rοοm temperature, it remains sοlid.
Rn: Radοn, is delegated a respectable gas. At rοοm temperature, it is gas.
Se: Selenium belοngs tο the nοn-metal class. At rοοm temperature, it remains sοlid.
As: Arsenic falls intο the metallοid οr semi-metal categοry.
Ru: Ruthenium belοngs tο the class οf transitiοn metals. At rοοm temperature, it remains sοlid.
Ta: Tantalum belοngs tο the grοup οf transitiοn metals. At rοοm temperature, it remains sοlid.
Eu: Eurοpium belοngs tο the class οf lanthanides. At rοοm temperature, it remains sοlid.
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10. What mass of methane gas (C2H6) is 6.10 x 1024 molecules?
Answer:
10 to the 24 power
Explanation:
Calculate the solubility product for the following:
Ce(IO3)4, 1.5 × 10–2 g/100.0 mL (IO3- is the anion)
Ksp = ______ x10______
Use correct significant figures
Answer: 2.749 x 10^-14
Explanation:
Given:
The concentration of Ce(IO3)4 in the solution = 1.5 x 10-2 g/100 mL= 0.15 g/1000 mL= 0.15 g/L
Molar mass of Ce(IO3)4 = 839.7267 g/mol
Therefore, the molarity of Ce(IO3)4 in the solution is given by:
\($$\begin{gathered}M=\frac{0.15 \mathrm{~g} / L}{839.7267 \mathrm{~g} / \mathrm{mol}} \\M=1.7863 \times 10^{-\mathbf{4}} \mathrm{mol} / {L}=\mathbf{1 . 7 8 6 3 \times 1 0 ^ { - \mathbf { 4 } } \boldsymbol { M }}\end{gathered}$$\)
The solubility equilibrium is given by:
\($$\mathrm{Ce}\left(\mathrm{IO}_{3}\right)_{4(s)} \rightleftharpoons \mathrm{Ce}_{(a q)}^{3+}+3 \mathrm{IO}_{3}^{-}(a q)$$\)
Therefore, the solubility product is given by:
\(\begin{gathered}K_{s p}=\left[C e^{3+}\right] \cdot\left[I O_{3}^{-}\right]^{3} \\\therefore K_{s p}=\left(1.7863 \times 10^{-4}\right) \times\left(3 \times 1.7863 \times 10^{-4}\right)^{3}\end{gathered}\)
\(\therefore {K_{s p}=2.749 \times 10^{-14}\)
Which of the following is involved in bonding between atoms?
Select one:
O a. neutrons
O b. protons
O c. electrons
O d. the nucleus
The following is involved in bonding between atoms is electron
There are four type of chemical bonds essential for life to exist and it is ionic bond, covalent bond, hydrogen bond, and Vander wall interaction and all of these are different kind of bond to play various role in biochemical interaction and the electron on the outermost energy level of the atom are called valence electron and the valence electron are involved in bonding one atom yo another
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What the expected outcome is, if the MDS is successfully implemented
If the MDS (Minimum Data Set) is successfully implemented, several positive outcomes can be expected. The MDS is a standardized assessment tool used in healthcare settings to evaluate the physical, mental, and psychosocial well-being of patients.
Its successful implementation can lead to improved patient care, more efficient resource allocation, and enhanced data analysis.With the MDS in place, healthcare providers can gather consistent and comprehensive data about patients, enabling better understanding of their needs and tailoring of individualized care plans.
This can result in improved treatment outcomes and patient satisfaction. Additionally, the MDS facilitates effective communication and information sharing among healthcare professionals, leading to coordinated care and reduced errors.From a broader perspective, successful implementation of the MDS allows for accurate and reliable data collection, enabling robust research and evidence-based decision-making.
This can contribute to advancements in healthcare practices, policy development, and quality improvement initiatives. Ultimately, the successful implementation of the MDS can enhance patient outcomes, improve healthcare delivery, and drive positive changes in the healthcare system as a whole.
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Which of the following best identifies where long-range order would be found?
in amorphous solids
in crystalline solids
in thermal plasmas
in nonthermal plasmas
Long-range order is best found in crystalline solids. Crystalline solids are characterized by a highly ordered arrangement of atoms or molecules in a repeating pattern called a crystal lattice. Option 2)
Long-range order is best found in crystalline solids. Crystalline solids are characterized by a highly ordered arrangement of atoms or molecules in a repeating pattern called a crystal lattice. The arrangement of the particles in a crystalline solid extends over long distances, resulting in a well-defined and repetitive structure.
In contrast, amorphous solids lack long-range order. They do not possess a well-defined crystal lattice or a regular arrangement of particles. The atoms or molecules in amorphous solids are arranged in a more random and disordered manner, leading to a lack of long-range order.
Thermal plasmas and nonthermal plasmas, on the other hand, are states of matter where the atoms or molecules are highly ionized, resulting in the formation of charged particles or ions. While plasmas can exhibit certain levels of order, they do not possess the same level of long-range order as crystalline solids.
Therefore, crystalline solids are the primary location where long-range order is typically found. Option 2)
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Note Complete Question
Which of the following best identifies where long-range order would be found?
1) in amorphous solids
2) in crystalline solids
3) in thermal plasmas
4) in nonthermal plasmas
OPTION B. Long-range order is most commonly found in crystalline solids, where atoms or molecules are arranged in a well-defined, consistent pattern. Amorphous solids and plasmas do not showcase this characteristic.
Explanation:Long-range order pertains to the organization and regularity of constituents over large scale distances. It's a term often associated with the structure of crystalline solids. This is due to the fact that their atoms or molecules are arranged in a well-defined and repeated pattern extending in all three spatial dimensions over the length of the solid. On the contrary, an amorphous solid does not have a long-range order, instead, its structure is only ordered on a short range. Plasmas, both thermal or nonthermal, are an ionized gas and do not exhibit long-range order, primarily due to their high level of kinetic energy and lack of fixed positions for particles.
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The last sentence in the “Introduction” was: “In this lab you will determine the density (thus characterizing a substance) of a liquid and of a solid-liquid mixture of unknown composition, and then determine the density of a liquid and a solid of known compositions and evaluate how accurate your determinations were.” Give names of those four substances mentioned in the sentence above. A liquid of unknown composition: _________________________________________, a liquid of known composition: ___________________________________________, a solid-liquid mixture of unknown composition: _______________________________, a solid of known composition:
Answer:
A liquid of unknown composition: Unknown liquid
A liquid of known composition: Known liquid
A solid-liquid mixture of unknown composition: Unknown solid-liquid mixture
A solid of known composition: Known solid
PLEASE MARK AS BRAINLIESTWhich of the following substances is insoluble in water, according to these solubility rules?
A) Sodium chloride (NaCl)
B) Calcium hydroxide (Ca(OH)2)
C) Potassium nitrate (KNO3)
D) Silver chloride (AgCl)
Which of the following ions is soluble in water when paired with according to the solubility rules chart?
C) Chloride (Cl-)
B) Sulfate
D) Hydroxide (OH-)
A) Carbonate
Question 12 (1.25 points)
Which of the following combinations will result in a precipitate, according to solubility rules?
A) Sodium nitrate (Na2CrO4) and barium chloride (BaCl2)
B) Ammonium chloride (NH4Cl) and sodium hydroxide (NaOH)
C) Calcium sulfate (CaSO4) and sodium carbonate (Na2CO3)
D) Potassium iodide (KI) and silver nitrate (AgNO3)
Question 13 (1.25 points)
Which of the following statements is true about dilute and concentrated solutions?
A) Dilute solutions have a higher solvent-to-solute ratio than concentrated solutions.
B) Concentrated solutions contain more solute than dilute solutions.
C) Dilute solutions contain more solute than concentrated solutions.
D) Concentrated solutions have a higher solvent-to-solute ratio than dilute solutions.
Question 14 (1.25 points)
What volume of a 0.500 M sodium chloride solution is required to make 500. mL of a 0.100 M sodium chloride solution?
A) 100 L
B) 0.100 ml
C) 0.100 L
D) 1 L
Question 15 (1.25 points)
A student has a 0.500 M solution of hydrochloric acid (HCl) that is too concentrated for an experiment. The student needs to dilute the solution to 0.100 M. If the student needs 250 mL of the diluted solution, how much of the original solution should be used?
A) 250 ml
B) 50.0 ml
C) 125 ml
D) 500 ml
Answer:
Question 10: Which substance is insoluble in water?
Answer: Silver chloride (AgCl).
Question 11: Which ion is soluble in water?
Answer: Chloride (Cl-).
Question 12: Which combination will form a precipitate (solid) according to solubility rules?
Answer: Calcium sulfate (CaSO4) and sodium carbonate (Na2CO3).
Question 13: Which statement is true about dilute and concentrated solutions?
Answer: Concentrated solutions have more solute than dilute solutions.
Question 14: How much of a 0.500 M sodium chloride solution is needed to make 500 mL of a 0.100 M solution?
Answer: 0.100 L (100 mL).
Question 15: How much of a 0.500 M hydrochloric acid solution should be used to make 250 mL of a 0.100 M solution?
Answer: 50.0 mL.
Explanation:
How do I turn on a Girl???
Answer:
7 Ways to turn a woman on. ...
Ask her what she likes, and do your homework. ...
Know the three parts of foreplay. ...
Be creative: Not all women are the same. ...
Know her body. ...
Help her feel comfortable receiving oral sex. ...
Play with lube or toys. ...
Remember that great sex won't happen overnight.
Explanation:
Answer: Ask her what she likes, and do your homework. ...
Know the three parts of foreplay. ...
Be creative: Not all women are the same.
Hope this helps
What quality does Tom Walker and his wife have in common?
The qualities Tom Walker and his wife have in common were they both were grasping and without conscience
The question has been asked from the story "The Devil and Tom Walker" by Washington Irving. As the story describes Tom's encounter with the devil, he is a complex character. However, he and his wife seem to complement each other well and have some personality traits in common. Tom and his wife are both miserly, avaricious, cruel, and morally void.
More so than her husband, Tom's stereotypically nagging, scolding wife verbally and perhaps even physically abuses him when she's not hoarding his valuables. Tom's wife courageously decides to accept Old Scratch's offer to sell her husband's soul for money when Tom first rejects it. She takes the family's silver into the swamp with her so she may haggle with the devil.
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5. Find the sum of all the valence electrons for NF, (Add how many valence electrons one nitrogen atom has with the
valence electron for three fluorine atoms.)
6. How many valence electrons are in the drawing of NF, above?
7. In CCL, carbon is the "central atom". In NF3 nitrogen is the "central atom". What is meant by "central atom"?
8. In SF₂ sulfur is the central atom. You can tell which atom is the central atom simply by looking at the formula.
What is meant by "central atom"?
9. Identify the central atom in each of the following molecules:
a. CO₂
b. PH3
c. SiO₂
a) There are 26 valance electrons in \(NF_{3}\) .
b) The central atom bears all the other atoms
c) CO₂ - Carbon is the central atom
\(PH_{3}\) - Phosphorus is the central atom
SiO₂ - Silicon is the central atom.
What are the valence electrons?We have to note that when we talk about the valence electrons, we mean the electrons that tend to occupy the valance shells of the atoms of the elements.
In the case of the compound that has been shown in the question,\(NF_{3}\) has about 26 valence electrons and this can be shwn from the Lewis structure of the compound shown.
The term central atom has to do with the atom to which all of the other atoms or groups can be seen to be attached.
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Select all the correct locations on the image. In this diagram, which subatomic particles have a negative charge?
Answer:
The correct answer is: (E), Electron.
Explanation:
There are three types of subatomic particles - protons (P) have a positive charge, neutrons (N) have zero charge, and electrons (E) have a negative charge.
Hope this helps!
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, electron is the subatomic particles that have a negative charge.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
Therefore, electron is the subatomic particles that have a negative charge.
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what is the difference between Earth and Exoplanets
Answer:
Earth has a strong gravitational field while exoplanets do not.
Explanation:
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All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets.
How many neutrons are there in a neutral argon atom? Show how you found your answer on your scratch paper.
Hydrogen reacts with oxygen according to the balanced equation
2H₂ (g) + O2(g) → 2H₂O(g). If X is the number of molecules of H₂ which react,
then the number of O2 molecules reacting is
Answer:
x/2
Explanation:
X = 2 molecules of H2
For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.
I hope I'm understanding this question right.
The periodic table says that the average mass of copper is 63.55 but there is no such thing as copper-63.55. Why? (please use copper-63 and copper-64 in your answer)
Answer:
69%for the isotope that weighs 62.93 u and
31
%
for the isotope that weighs 64.93 u.
You can approach this problem by using a single equation; let's say the first isotope contributes to the relative atomic mass by a fraction
x
(
x
<
1
). SInce there are only 2 isotopes to consider, the fraction the other isotope contributes with will automatically be
1
−
x
.
Let's set up the equation
x
⋅
62.93
u
+
(
1
−
x
)
⋅
64.93
u
=
63.55
u
Solving this for
x
will produce
64.93
u
−
63.55
u
=
2
x
→
x
=
1.38
2
=
0.69
Multiplying these fractions (0.69 and 1 - 0.69 = 0.31) by 100% percent to get the results as a percentage will give
69
%
for the isotpe that weighs 62.93u and
31
%
for the one that weighs 64.93u.
Answer link
What is the mass of a rectangular piece of copper 24.4cm x 11.4 cm x 7.9 cm? The density of copper is 8.92g/cm3.
The mass of the rectangular piece of copper is 18,869 g (approx).In conclusion, the mass of a rectangular piece of copper with dimensions 24.4cm x 11.4 cm x 7.9 cm and a density of 8.92 g/cm³ is 18,869 g (approx.).
The given dimensions of the rectangular piece of copper are:Length = 24.4 cmWidth = 11.4 cmHeight = 7.9 cmThe formula to calculate the mass of an object is given by;
Mass = Density x Volume
Here, the density of copper is given as 8.92 g/cm³.
Therefore, the first step is to calculate the volume of the rectangular piece of copper.The formula to calculate the volume of a rectangular object is given by:
Volume = Length x Width x Height
So,Volume = 24.4 cm x 11.4 cm x 7.9 cm= 2115.432 cm³Now we will use the mass formula:
Mass = Density x Volume= 8.92 g/cm³ x 2115.432 cm³= 18,869.27824 g= 18,869 g (approx.)
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Topic: Washing Machine Durability We wanted to test which brand of washing machine (Warp-pool, Sam's Sung, or GEE) was the most durable. Experiment(al) Design: For our experiment we bought three brand new Washing Machines. A Warp-pool, Sam's Sung, and a GEE. We loaded each washing machine with 50 clay bricks. We ran all of the washing machines at the same time, non-stop, and recorded how long it took each one to break down. We recorded that data in the Table 1. Data: Brand of Washing Machine Length of time till it stopped working Warp-pool 10 Days, 5 Hours and 3 minutes Sam's Sung 2 months, 13 hours and 52 minutes GEE 1 month, 2 hours, and 32 minutes. Question at position 3 3 10 points Question at position 3 Describe your reasoning for writing the claim that you did. Response Expectations: Write in complete sentences. Your response should be a few sentences in length. I should be able to understand your reasoning clearly.
The claim that "GEE washing machine is more durable than Warp-pool and Sam's Sung washing machines" is based on the experimental data gathered from the test. The data shows that the GEE washing machine was able to run for a longer period of time before breaking down, compared to the Warp-pool and Sam's Sung washing machines. With only 1 month, 2 hours, and 32 minutes of running time, GEE washing machine outlived the other two brands, which were able to run for 10 days, 5 hours, and 3 minutes and 2 months, 13 hours, and 52 minutes respectively. This indicates that the GEE washing machine is more durable and can withstand more wear and tear compared to the other two brands.
what element is this
Answer:
neon
Explanation:
there are 10 protons