Braddy could use two batteries instead of one. One way he could increase the strength of his magnet is to increase the current and add a second battery. He could also add more coils of wire, not use fewer.
N2 + 3 H2 -> 2 NH3
How many mols of N2 will be produced if it reacts with 2.5 x 1021 molecules of N2
Calculate the entropy change for a process in which 3.00 moles of liquid water at 08c is mixed with 1.00 mole of water at 100.8c in a perfectly insulated container. (assume that the molar heat capacity of water is constant at 75.3 j k21 mol21.)
Answer:
The entropy change for combining the two temperatures of water is 2.9 J/K.
Hope I helped!!! :)
Which substance cannot be broken down by a chemical change?
A) butanal
B) propene
C) gold
D) water
The substance that cannot be broken down by chemical change is [tex]\boxed{{\text{C) gold}}}[/tex].
Further Explanation:
Substance is the pure form of matter while a combination of atoms or molecules is termed as a mixture.
Types of substances:
1. Element
The simplest form of substance that cannot be further decomposed by any chemical means is called an element. Carbon, sulfur, and cobalt are some of the examples of elements.
2. Compound
When two or more different elements are held together by chemical methods, compounds are formed. These can further be decomposed into their corresponding constituents. The properties of compounds are very different from those of their constituent elements. NaCl, [tex]{\text{C}}{{\text{H}}_{\text{4}}}[/tex] and [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex] are examples of compounds.
A) Butanal [tex]\left( {{{\text{C}}_4}{{\text{H}}_8}{\text{O}}} \right)[/tex] is made up of four carbon atoms, eight hydrogen atoms, and an oxygen atom so it is a compound. Therefore it can be broken down by chemical change.
B) Propene [tex]\left( {{{\text{C}}_{\text{3}}}{{\text{H}}_{\text{6}}}} \right)[/tex] is made up of three carbon atoms and six hydrogen atoms so it is a compound. Therefore it can be broken down by chemical change.
C) Gold [tex]\left( {{\text{Au}}} \right)[/tex] is an element so it is present in its simplest form. Therefore it cannot be broken down by chemical change.
D) Water [tex]\left( {{{\text{H}}_{\text{2}}}{\text{O}}} \right)[/tex] is made up of one oxygen and two hydrogen atoms so it is a compound. Therefore it can be broken down by chemical change.
Learn more:
How to classify brass? https://brainly.com/question/9053565 Which must be a mixture of substances? https://brainly.com/question/637791Answer details:
Grade: High School
Subject: Chemistry
Chapter: Elements, compounds, and mixtures
Keywords: substance, butanal, propene, gold, water, element, compound, chemical change, decomposed, simplest form, NaCl, CH4, carbon, sulfur, cobalt.
Gold, being an element, cannot be broken down further by a chemical change whereas butanal, propene, and water, being compounds, can be.
Explanation:The substance which cannot be broken down by a chemical change is gold. This is because gold is an element. Elements are pure substances that are made from a single type of atom and cannot be broken down further by chemical methods. On the other hand, butanal, propene, and water are all compounds, which are substances formed when two or more chemical elements are chemically bonded together. Compounds can be decomposed into simpler substances, or their constituent elements, by chemical change.
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Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH–] is 1 x 10–11 mol/L. Is this solution acididc, basic, or neutral? Show your work.
Please help thanks so much! :)
we have been given the [OH⁻] therefore we can first find the pOH value
pOH scale is used to determine the basicity of a solution
pOH = - log [OH⁻]
pOH = - log (1 x 10⁻¹¹ M)
pOH = 11
after knowing the pOH we can calculate pH using following equation
pH + pOH = 14
since pOH = 11
pH = 14 - 11
pH = 3
pH scale is used to determine how acidic a solution is
once pH is known we can can calculate Hydrogen ion concentration
pH = - log [H⁺]
[H⁺] = antilog (-pH)
[H⁺] = antilog(-3)
[H⁺] = 1 x 10⁻³ M
if pH is less than 7 - solution is acidic
pH = 7 the solution is neutral
pH more than 7 - solution is basic
pH of solution is 3 which is less than 7
therefore solution is acidic
and hydrogen ion concentration is 1 x 10⁻³ M
Within an atom, electrons A. are in motion inside the nucleus. B. are in motion outside the nucleus. C. are inside the nucleus and are motionless. D. are outside the nucleus and are motionless
Hello! The correct answer is, B. are in motion outside the nucleus.
I hope this helped!
Within an atom, electrons are in motion outside the nucleus of an atom. The correct answer is option B.
An electron is a subatomic particle that carries a negative electric charge. It is one of the fundamental particles that make up atoms, along with protons and neutrons.
The electrons move around the nucleus in specific energy levels or orbitals, which determine the chemical and physical properties of the element. The electrons are negatively charged particles and are attracted to the positively charged protons in the nucleus, which keeps them in orbit around the nucleus. The electrons are not motionless but are constantly moving and can be excited to higher energy levels by absorbing energy or by interacting with other atoms or particles.Therefore, option B. are in motion outside the nucleus, is the correct answer.
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How does improving food-storage facilities make farming more sustainable?
A. It decreases the amount of water needed.
B. It keeps food from rotting as quickly and being wasted.
C. It decreases the amount of land needed.
D. It keeps chemicals from entering the watershed.
B. is indeed correct
Which of the following can explain the daily change in sea level observed along a coast?
A.The gravitational pull of the moon on the water near the coast
B.The speed of the ocean's conveyor belt near the coast
C.Earthquakes and volcanoes near the coast
D.The concentration of salt in the water near the coast
Answer:
The gravitational pull of the moon on the water near the coast (option A) can explain the daily change in sea level observed along a coast.
Explanation:
The tides are rising and falling from sea level that occur several times a day. These periodic changes in the level of the sea are produced by the gravitational forces of attraction of the Sun and the Moon with respect to the Earth. But the force of attraction of the Moon is greater than that of the Sun, due to the proximity of the satellite.
High tide or high tide is the time when the sea reaches its maximum height. Low tide or low tide is the time when the sea reaches its minimum height.
The tide is noticed on the beaches because the coastline can go forward or backward many meters.
Finally, the gravitational pull of the moon on the water near the coast (option A) can explain the daily change in sea level observed along a coast.
Write a balanced chemical equation for the reaction. na2co3 and agno3
The balanced chemical reaction between [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] and [tex]{\text{AgN}}{{\text{O}}_3}[/tex] is
[tex]\boxed{{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left( {aq} \right) + 2{\text{AgN}}{{\text{O}}_3}\left( {aq} \right) \to 2{\text{NaN}}{{\text{O}}_3}\left( {aq} \right) + {\text{A}}{{\text{g}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left( s\right)}[/tex]
Further Explanation:
The chemical reaction that contains an equal number of atoms of the different elements in the reactant as well as in the product side is known as a balanced chemical reaction. The chemical equation is required to be balanced to follow the Law of the conservation of mass.
The steps to balance a chemical reaction are as follows:
Step 1: Complete the reaction and write the unbalanced symbol equation.
In this reaction, [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] reacts with [tex]{\text{AgN}}{{\text{O}}_3}[/tex] to form [tex]{\text{NaN}}{{\text{O}}_{\text{3}}}[/tex] and [tex]{\text{A}}{{\text{g}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex]. The unbalanced chemical equation is as follows:
[tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left( {aq} \right) + {\text{AgN}}{{\text{O}}_3}\left( {aq} \right) \to {\text{NaN}}{{\text{O}}_3}\left( {aq} \right) + {\text{A}}{{\text{g}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left(s\right)[/tex]
Step 2: Then we write the number of atoms of all the different elements that are present in a chemical reaction in the reactant side and product side separately.
• On reactant side,
Number of sodium atoms is 2.
Number of carbon atoms is 1.
Number of oxygen atom is 6.
Number of silver atom is 1.
Number of nitrogen atom is 1.
• On product side,
Number of sodium atom is 1.
Number of carbon atoms is 1.
Number of oxygen atom is 6.
Number of silver atoms is 2.
Number of nitrogen atom is 1.
Step 3: Initially, we try to balance the number of other atoms of elements except for carbon, oxygen, and hydrogen by multiplying with some number on any side. But nitrogen atoms on both sides of the equation are already equal. To balance the number of sodium and silver atoms, multiply [tex]{\text{AgN}}{{\text{O}}_{\text{3}}}[/tex] and [tex]{\text{NaN}}{{\text{O}}_{\text{3}}}[/tex] by 2. So the equation is,
[tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left( {aq} \right) + \boxed2{\text{AgN}}{{\text{O}}_3}\left( {aq} \right) \to \boxed2{\text{NaN}}{{\text{O}}_3}\left( {aq} \right) + {\text{A}}{{\text{g}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left(s\right)[/tex]
Step 4: After this, we balance the number of atoms of carbon and then hydrogen atom followed by oxygen atoms. But these are already balanced. Now the reaction is,
[tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left( {aq} \right) + 2{\text{AgN}}{{\text{O}}_3}\left( {aq} \right) \to 2{\text{NaN}}{{\text{O}}_3}\left( {aq} \right) + {\text{A}}{{\text{g}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left(s\right)[/tex]
Step 5: So the balanced chemical equation is given as follows:
[tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left( {aq} \right) + 2{\text{AgN}}{{\text{O}}_3}\left( {aq} \right) \to 2{\text{NaN}}{{\text{O}}_3}\left( {aq} \right) + {\text{A}}{{\text{g}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}\left(s\right)[/tex]
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Chemical reaction and equation
Keywords: balanced chemical reaction, reactant side, product side, AgNO3, NaNO3, Ag2CO3, Na2CO3, nitrogen atom, sodium atoms, oxygen atoms, carbon atoms, silver atoms.
Write the name for sn(so4)2. remember that sn forms several ions.
Answer: The name of the given compound is tin (IV) sulfate.
Explanation:
The given compound is formed by the combination of tin ions and sulfate ions. It is an ionic compound.
The nomenclature of ionic compounds is given by:
Positive ion is written first.The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.In case of transition metals, the oxidation state are written in roman numerals in bracket in front of positive ions.In the given compound, tin is present in +4 oxidation state.
Hence, the name of the given compound is tin (IV) sulfate
Electromotive force is usually provided by a _____ or _____ in an electric circuit.
Why is the adhesive property of the pvc plastic important? 1 pt?
To protect itself from herbivores, plants ______
A.secrete toxins
B. have thorns
C. both secrete toxins and have thorns
D. Cannot do anything because they cannot protect themseleves
How many hydrogen atoms are attached to each carbon adjacent to a double bond? nurition?
If 2.34 g of NaCl was formed how many moles of NaHCO3 must have been used in the reaction? (Report only the numerical portion of your answer [i.
e. leave off the units] to 3 significant digits)
If 2.34 g of NaCl was formed, the number of moles of NaHCO3 must have been used in the reaction is 0.0800 mol
Explanation:To determine the number of moles of NaHCO3 that must have been used in the reaction, we need to use the balanced chemical equation and the given mass of NaCl.
The balanced chemical equation for the reaction is: 2 NaHCO3 + H2SO4 → 2 CO2 + Na2SO4 + 2H2O
From the balanced chemical equation, we can see that there is a one-to-one ratio between NaCl and NaHCO3.
Therefore, the number of moles of NaHCO3 used in the reaction is the same as the number of moles of NaCl formed.
To find the number of moles of NaHCO3, we need to convert the mass of NaCl to moles using the molar mass of NaCl.
The molar mass of NaCl is 58.44 g/mol (22.99 g/mol for Na + 35.45 g/mol for Cl).
Let's assume that x moles of NaHCO3 were used in the reaction.
From the balanced chemical equation, we know that 2 moles of NaHCO3 react to form 2 moles of CO2.
Therefore, the molar ratio between NaHCO3 and CO2 is 2:2.
Since we have found that there are 2.34 g of NaCl formed, we can now set up the following equation:
x moles NaHCO3 = 2.34 g NaCl × (1 mol NaCl/58.44 g NaCl) × (2 mol NaHCO3/2 mol NaCl)
Calculating this, we get:
x = 0.0800 mol
So therefore the number of moles of NaHCO3 is 0.0800 mol
Which of the following is not true about the dilution of a solution?
the concentration decreases
the amount of solute remains constant
the volume decreases
the amount of solvent increases
How does the arrangement of the particles in a gas compare to that of a solid? (c?)
A. The arrangement of particles in a gas is the same as that of a solid.
B. The particles in a gas are closer together than the particles in a solid.
C. The particles in a gas are farther apart than the particles in a solid.
D. The arrangement of particles in a gas will depend on the mass of the gas.
The arrangement of particles in a gas differs from that in a solid in that they are farther apart, allowing gases to fill their containers' volume and shape.
Explanation:How does the arrangement of the particles in a gas compare to that of a solid? The correct answer is that the particles in a gas are farther apart than the particles in a solid (Option C). This difference in particle arrangement is crucial for understanding the distinct physical properties of solids, liquids, and gases.
Solids and liquids are considered condensed phases because their particles are very close together, which leads to them having definite volumes. Conversely, the particles in a gas phase are much more spread out, allowing them to move freely at high speeds. This significant separation between particles in a gas means that a gas can expand to fill the shape and volume of its container, differentiating it notably from solids and liquids.
A 6.0 l container holds a sample of hydrogen gas at 150 kpa. if the pressure increases to 2 atm and the temperature remains constant, what will the volume be?
Answer:
The volume will be 4.44 L
Explanation:
Data:
First volume, V1 = 6 L
First pressure, P1 = 150 kPa -> 150 kPa * 1 atm/101.325 kPa = 1.48 atm
Second pressure, P2 = 2 atm
Second volume, V2 = ? L
From Boyle's law:
P1*V1 =P2*V2
V2 = P1*V1/P2
V2 = 1.48*6/2
V2 = 4.44 L
what type of weathering effects granite
Which of these can be used to distinguish a mixture from a compound?
Evaporation occurs when the molecules at the surface of a liquid gain enough _______ to overcome the _______ of other molecules in the liquid phase.
Final answer:
Evaporation happens when surface liquid molecules gain enough kinetic energy to break free from intermolecular forces, turning into gas and creating vapor pressure.
Explanation:
Evaporation occurs when the molecules at the surface of a liquid gain enough kinetic energy to overcome the intermolecular forces of other molecules in the liquid phase. This physical process, known as vaporization or evaporation, involves molecules absorbing enough energy to enter the gas or vapor phase, creating what is called vapor pressure. The escape of molecules from the liquid phase to the gas phase is dependent on the molecules having a kinetic energy greater than a certain threshold. This energy helps them to overcome the attractive forces that hold them in the liquid. As temperature increases, the average kinetic energy of the molecules increases as well, leading to more molecules having the energy to vaporize.
On a practical level, we experience the effects of evaporative cooling in everyday life. For example, on a hot day, the water molecules in perspiration absorb body heat and evaporate from the surface of your skin, leaving behind a cooling sensation.
Understanding how much of a product is produced in a reaction is referred to as ________ understanding the reaction?
When 190 grams of titanium tetrachloride react with an excess of water, as shown in the unbalanced chemical equation below, how many moles of hydrochloric acid will be produced? (1 point)?
When 1.0 mole of fe(s) reacts with excess o2(g) and 0.325 moles of fe2o3 are produced. what is the %yield of fe2o3?
Final answer:
The %yield of Fe2O3 from the reaction of 1.0 mol of Fe with excess O2 producing 0.325 moles of Fe2O3 is calculated to be 65%, using the stoichiometric ratios from the balanced chemical equation.
Explanation:
The question involves calculating the %yield of Fe2O3 when 1.0 mole of Fe(s) reacts with excess O2(g) and produces 0.325 moles of Fe2O3. To determine the theoretical yield, we must first understand the balanced equation of the reaction, which is 4 Fe + 3 O2 → 2 Fe2O3. From this equation, we can deduce that 4 moles of Fe should ideally produce 2 moles of Fe2O3. Given that we started with 1.0 mol of Fe, the theoretical yield for Fe2O3 would be 0.5 mol, considering the stoichiometric ratios.
To find the %yield, we use the formula: (%yield) = (actual yield / theoretical yield) × 100%. Substituting the given values, we have (%yield) = (0.325 mol / 0.5 mol) × 100% = 65%. Therefore, the %yield of Fe2O3 when 1.0 mole of Fe(s) reacts with excess O2(g) to produce 0.325 moles of Fe2O3 is 65%.
A 5.63 g sample of solid gold is heated from 21.0 ºC to 32.0 ºC. How much energy (in J and cal) is required?
Final answer:
The energy required to heat a 5.63 g sample of solid gold from 21.0 °C to 32.0 °C is approximately 8.0239 J or 1.9174 cal, using the specific heat capacity of gold (0.129 J/g°C).
Explanation:
To calculate the energy required to heat the sample of solid gold, we can use the formula: q = mcΔT, where q is the heat energy in joules (J), m is the mass of the substance in grams (g), c is the specific heat capacity (J/g°C), and ΔT is the change in temperature in degrees Celsius (°C).
The mass m of solid gold is 5.63 g, and the specific heat capacity c of gold is given as 0.129 J/g°C. The change in temperature ΔT is (32.0 °C - 21.0 °C) = 11.0 °C.
Therefore, the energy required in joules is:
q = (5.63 g) × (0.129 J/g°C) × (11.0 °C) = 8.0239 J.
To convert joules to calories, we use the conversion factor: 1 cal = 4.184 J. Therefore,
q in calories is: q = 8.0239 J × (1 cal / 4.184 J) = 1.9174 cal.
The energy required to heat the sample of gold from 21.0 °C to 32.0 °C is approximately 8.0239 J or 1.9174 cal.
What properties of the wave define why it is found within this area of the spectrum for visible light
Visible light waves have specific properties, including wavelength, that allow them to be detected by the human eye and reach Earth's surface effectively.
Explanation:Visible light consists of electromagnetic waves that behave like other waves. One important property of light waves is the wavelength, which is the distance between one peak of a wave and the next peak. In the case of visible light, the wavelengths range from about 400 to 700 nanometers (nm). This range of wavelengths is found within the visible light spectrum because these are the waves that human vision can perceive. Human eyes have evolved to see these waves most effectively, and visible light also readily reaches Earth's surface, penetrating the atmosphere effectively.
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number of grams in four moles of BaCO3
gas-to-liquid synfuel production can produce diesel, naptha and paraffin. The formation of these products usually involves _____. the Fischer-Tropsch Process the removal of carbon atoms from the fuel adding highly acidic substances such as hydrochloric acid the production of radioactive waste that must be stored in protective barrels
Given the reaction below, which is the oxidized substance? Mg + Cl2 mc005-1.jpg Mg2+ + 2Clmc005-2.jpg 2CI- CI2 Mg Mg2+
The given chemical reaction is:
Mg + Cl₂ → Mg²⁺ + 2Cl⁻
The reaction can be broken down into two half-reactions as follows:
Mg → Mg²⁺ + 2e⁻ ------(1)
Cl₂ + 2e⁻ → 2Cl⁻ ------(2)
Reaction (1) is an oxidation reaction as it involves loss of electrons.
Reaction (2) is reduction reaction as it involves gain of electrons.
The oxidation state of Mg changes from 0 (Mg) to +2 (Mg2+). Hence, Mg is the oxidized substance
Answer:
Mg
Explanation:
Edge
Brad and matt are working in the lab.they noticed that when they mixed two dilute solutions together,the reaction between them happened very slowly. Which of matt's suggestion would best help to increase the rate of this reaction?
what’s the difference between direct and indirect methods of flood control?
Final answer:
Direct methods of flood control involve structural defenses like dams and levees, while indirect methods employ natural solutions, such as afforestation and wetland development, to absorb and manage water flow.
Explanation:
The difference between direct and indirect methods of flood control involves the approach taken to manage and reduce the impact of floods. Direct methods are structural solutions like levees, dams, and reservoirs that physically prevent floodwaters from reaching vulnerable areas. These methods can control the flow of water, store excess water during times of heavy rain, and are often engineered to protect specific locations.
Indirect methods include strategies like afforestation, maintaining mangrove forests, or developing wetlands, which aim to enhance the natural capacity of the environment to manage water levels without the construction of artificial barriers. Indirect methods can absorb and slow the water to reduce flooding, benefiting the ecosystem and reducing the risk of erosion on a broader scale.