Answer:
aluminum will lose 3 electrons.
Explanation:
to be stable and losing 3 is easier than gaining 5.
anddd its a metal. :)
What type of reaction occurs when energy is released?
Which could be the pH of an aqueous solution with a H3O+ ion concentration that is less than its OH- ion concentration?
A. 2
B. 3
C. 4
D. 9
Answer:
Explanation:
You can think of pH as "parts Hydrogen ion," but remember that the pH scale is "backwards." The pH scale ranges from 0 to 14, with zero being the most acidic (highest concentration of H+) and 14 being the most basic.
The pH of an aqueous solution will be:
D. 9
When the [tex]H_3O^+[/tex] ion concentration is less than its [tex]OH^-[/tex] ion concentration.
What does pH tell?pH is used to indicate whether a solution is acidic or alkaline depending upon the pH of the solution. If pH is below 7 then the solution is acidic, if the pH is above 7 then the solution is basic and if the pH is 7 then the solution is neutral.
When the [tex]H_3O^+[/tex] ion concentration is less than its [tex]OH^-[/tex] ion concentration this means that the solution has more [tex]OH^-[/tex] ion and this makes the solution basic.
Thus, correct option is D, i.e. pH is 9.
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¿ que característica tiene el conocimiento científico ?
Answer: El conocimiento científico es un saber crítico (fundamentado), metódico, verificable, sistemático, unificado, ordenado, universal, objetivo, comunicable (por medio del lenguaje científico), racional, provisorio y que explica y predice hechos por medio de leyes.
Explanation: El conocimiento científico es un saber crítico (fundamentado), metódico, verificable, sistemático, unificado, ordenado, universal, objetivo, comunicable (por medio del lenguaje científico), racional, provisorio y que explica y predice hechos por medio de leyes.
A family decides to use their bicycles to get to the mall on weekends instead of driving a car. How is the family helping the environment? (2 points) HELPPPPP
Answer:
They are releasing less carbon dioxide into the air.
Carbon dioxide is what causes global warming and greenhouse gases, etc.
What is the mass number and atomic number of Ca0
Answer:
56.0774g/mol
Explanation:
hope you like it ☺️
If there are 3.0 liters of gas at a pressure of 2.0 atm at constant temperature, what is the pressure if the volume is reduced by one half?
Answer:
The pressure is doubled, 4.0atm
Explanation:
Based on Boyle's law, the pressure of a gas is inversely proportional to its volume at constant temperature. The equation that describes this law is:
P1V1 = P2V2
Where P is pressure and V volume at 1, initial state and 2, final state of the gas.
Computing the values of the problem:
P1 = 2.0atm
V1 = 3.0L
P2 = ?
V2 = 3.0L / 2 = 1.5L
Replacing:
2.0atm*3.0L = P2*1.5L
6.0atmL / 1.5L = P2
4.0atm = P2
The pressure is doubled, 4.0atm1. If you have 200 g of Al2(CO3)3 , how many moles will you have? Show your work.
Answer: There are 0.854 moles of [tex]Al_{2}(CO_{3})_{3}[/tex] present in 200 g of [tex]Al_{2}(CO_{3})_{3}[/tex].
Explanation:
Given: Mass of [tex]Al_{2}(CO_{3})_{3}[/tex] = 200 g
As number of moles is the mass of substance divided by its molar mass.
Molar mass of [tex]Al_{2}(CO_{3})_{3}[/tex] is 233.99 g/mol.
Therefore, moles of [tex]Al_{2}(CO_{3})_{3}[/tex] is calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{200 g}{233.99 g/mol}\\= 0.854 mol[/tex]
Thus, we can conclude that there are 0.854 moles of [tex]Al_{2}(CO_{3})_{3}[/tex] present in 200 g of [tex]Al_{2}(CO_{3})_{3}[/tex].
Which gas would you expect to have the fastest diffusion rate?
A. Ammonia (NH3)
B. Oxygen (O2)
C. Nitrogen (N2)
How many Oxygen atoms are in 2NA(OH)3
Answer:
3 oxygen atom
hope it helps.
Answer:
Explanation:
There are 3 oxygen atoms.
have a nice day!Can you choose me brainliest?
if an electrically neutral atom has 57 protons how many electrons does it have?
Answer: 57
Explanation: Because the atom is neutral, it’s #e= Protons + zero charge (for all neutral atoms)
Hence, #e= 57+0=57 electrons
An electrically neutral atom have 57 protons so it will be having 57 electrons .
What do you mean by electrically neutral atom ?An atom is electrically neutral when the overall charge of an atom is zero. The atoms are made of three subatomic particles called protons, electrons and neutrons.
Protons are positively charged particles, electrons are negatively charged and neutrons are neutral.
The number of electrons is equal to the number of protons due to which positive and negative charge cancels each other out.
According to the question,
Because the atom is neutral , it’s
Electrons= Protons + zero charge (for all neutral atoms)
Hence,
Electrons= 57+0
=57 electrons
Hence, an electrically neutral atom have 57 protons so it will be having 57 electrons .
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Determine the grams of barium chloride produced when 500 grams of barium hydroxide
react with 500 grams of HCI.
Answer:
Take about 2g barium hydroxide in a test tube. Add 1 g of ammonium chloride and mix with the help of a glass rod. Touch the bottom of the test tube with your palm. What do you feel? Is this an exothermic or endothermic reaction?
Alternative fuel sources such solar and wind energy are gaining popularity and replacing fossil fuels in many applications. While there are many positive benefits to this technology, what negative impacts do they present?
Answer:
Environmental limitations.
Explanation:
The nonrenewable sources of energy include coal, oil natural gas, and nuclear power. While the renewable source of energy include tidal, solar, geothermal, and wind power. All the sources of nonrenewable energy are called fossil fuels. There are many positives of this alternate energy such as clean and clear energy. Though there may be some negative impacts such as land use changes for setting up solar panels, and windmill farms. These techniques are costly to maintain and implement in all sectors.Describe at least 3 phases of thr water cycle and make sure to explain The state of matter of water at each of the phases
At 40 mph, how long does it take to travel 64 miles
(copper is cu) How many copper atoms in 3CuSO,
Answer:
3
Explanation:
because 3CuSO and the 3 in front present how many it has
How many molecules of hydrogen gas was produced if
5.0 moles of lead was consumed?
Answer:
3.01×10²⁴ molecules of H₂
Explanation:
Reaction that can produce hydrogen gas from Pb can be this:
Pb + H₂S → PbS + H₂
1 mol of Pb can react to 1 mol of H₂S to produce 1 mol of PbS and 1 mol of H₂
Ratio is always 1:1.
In conclussion 5 moles of lead will produce 5 moles of H₂.
Let's apply the NA to count molecules
1 mol contains 6.02×10²³
Then, 5 moles must contain (5 . 6.02×10²³) = 3.01×10²⁴ molecules
Which galaxy is represented in the
image above?
A. Irregular galaxy
B. Spiral galaxy
C. Elliptical galaxy
D. Electromagnetic galaxy
Answer:
I need to see the galaxy to answer your question
Complete the sentence. A substance that is more basic has a___pH
than a substance that is acidic. *
the same
higher
lower
none of the above
Answer:
Higher
Explanation:
The table shows data about abiotic factors of streams in two different watersheds.
In general, a stream with a lower temperature and more neutral pH tends to be
healthier. Based on these criteria, which watershed contains the healthier
stream?
Answer:
B
Explanation:
The specific heat capacities of some metals (in J g−1 K−1) are given below. Copper: 0.385 Magnesium: 1.020 Mercury: 0.138 Platinum: 0.130 If 100 kJ of heat is added to 10.0 g samples of each of the metals above, all at 25°C, determine which metal will have the smallest increase in temperature.
Answer: Magnesium metal will have the smallest increase in temperature.
Explanation:
Given: Specific heats are as follows.
Copper = 0.385 J/g K, Magnesium = 1.020 J/g K
Mercury = 0.138 J/g K, Platinum = 0.130 J/g K
Heat energy = 100 kJ (1 kJ = 1000 J) = 100000 J
mass = 10.0 g
Initial temperature = [tex]25^{o}C[/tex]
Formula used to calculate the increase in temperature for each of the given elements is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass
C = specific heat
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
The change in temperature for copper is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 0.385 J/g K \times (T_{2} - 25)\\T_{2} = 25999.026^{o}C[/tex]
The change in temperature for magnesium is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 1.020 J/g K \times (T_{2} - 25)^{o}C\\T_{2} = 9828.92^{o}C[/tex]
The change in temperature for mercury is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 0.138 J/g K \times (T_{2} - 25)^{o}C\\T_{2} = 72488.77^{o}C[/tex]
The change in temperature for platinum is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 0.130 J/g K \times (T_{2} - 25)^{o}C\\T_{2} = 76948.08^{o}C[/tex]
Thus, we can conclude that magnesium metal will have the smallest increase in temperature.
A 5.00 mL sample of hydrochloric acid is titrated with 0.1293 M ammonia (a base). If the titration required 28.15 mL of ammonia, determine the following:
the original concentration of the acid
the original pH of the acid
Answer:
1. C = 0.73 M.
2. pH = 0.14
Explanation:
The reaction is the following:
HCl + NH₃ ⇄ NH₄⁺Cl⁻
From the titration, we can find the number of moles of HCl that were neutralized by the ammonia.
[tex] n_{a} = n_{b} [/tex]
Where "a" is for acid and "b" is for base.
The number of moles is:
[tex] n = C*V [/tex]
Where "C" is for concentration and "V" for volume.
[tex] C_{a}V_{a} = C_{b}V_{b} [/tex]
[tex] C_{a} = \frac{0.1293 M*28.15 mL}{5.00 mL} = 0.73 M [/tex]
Hence the initial concentration of the acid is 0.73 M.
The original pH of the acid is given by:
[tex] pH = -log([H^{+}]) [/tex]
[tex] pH = -log(0.73) = 0.14 [/tex]
Therefore, the original pH of the acid is 0.14.
I hope it helps you!
What are the different types of excretion?
Answer:
There are 4 excretory organs in human: The skin, the lungs, the liver, and the kidney (Urinary system). The skin excretes the sweat outside the body through numerous pores in the surface of this organ. Sweat is a mixture of three metabolic wastes: water, salts, and urea.
Some chemical factories make hydrogen gas (H2) using a process called steam methane reforming. In this process, methane (CH4) combines with steam (H2O) at high temperatures to form a mixture of hydrogen gas and carbon monoxide (CO). This mixture can then be used to make substances like hydrogen fuel and ammonia
Answer:
steam and methane
Explanation:
A sample of seawater contains 78.0 grams of NaCl in 2,025 mL of solution. If the molar mass of NaCl is 58.443 g/mol, what is the molarity of this sample?
0.659 M NaCl
0.823 M NaCl
1.84 M NaCl
2.08 M NaCl
Answer:
0.659 M NaCl
Explanation:
Equation: Molarity = moles of solute / liters of solution
1. To find moles of solute:
78.0 g NaCl x 1 mol NaCl / 58.44 g NaCl
= 1.334 mol NaCl
2. Calculate molarity
Transfer 2,025 mL to L
1.334 / 2.025 = 0.659 M NaCl (rounded)
The molarity of the sample of seawater that contains 78.0 grams of NaCl in 2,025 mL of solution is 0.66M.
How to calculate molarity?The molarity of a solution can be calculated by dividing the number of moles by its volume.
However, the number of moles of the substance can be calculated as follows:
no of moles = 78g ÷ 58.443g/mol
no of moles = 1.335mol
molarity = no of moles ÷ volume
molarity = 1.335mol ÷ 2.025L
molarity = 0.66M
Therefore, the molarity of the sample of seawater that contains 78.0 grams of NaCl in 2,025 mL of solution is 0.66M.
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If you were to add salt to water , what temperature would you expect it to boil? Assume you’re at sea level
100 c
More than 100 c
Less than 100 c
Answer:
100c
Explanation:
Match each chemical reaction with the type of reaction that best describes it
Explanation:
Types of Chemical ReactionCombination Reaction.Decomposition Reaction.Displacement Reaction.Double Displacement Reaction.Oxidation and Reduction Reaction.stay safe healthy and happy.Write the oxidation and reduction half reaction for the equation below, show all work:
Na + Cl = NaCl
Explanation:
Oxidation in an element occurs when it is losing electrons in the chemical reaction. So it will become more positive in charge.
Reduction occurs when an element gains electrons in the chemical reaction. So it will become more negative in charge.
A good way to remember this is:
OIL RIG= Oxidation Is Losing Reduction Is Gaining
So let's first determine the oxidation number of each element and see how Na & Cl charge in charge to determine if they're being reduced or oxidized.
Na + Cl = NaCl
If we refer to our table, lone elements will always be 0.
0 0
Na + Cl = NaCl
Now we can do the products side where we now have a compound so how did they change now that they're bonded together?
According to our table, group 1 is +1 oxidation number. What about Cl? It has to balance our Na so the overall charge of the compound is neutral (0). So it would be -1.
0 0 +1 -1
Na + Cl = NaCl
Na goes from 0 > +1 where it loses e- > oxidation
Cl goes from 0 > -1 where is gains e- > reduction
So our respective half reactions would be:
Na = NaCl and Cl= NaCl
Its okay if we use the product twice, since it's part of both half reactions.
Identify the element that cannot participate in nuclear fission reactions. (Hint: Think about the size of the atom.)
A.
hydrogen
B.
uranium
C.
thorium
D.
plutonium
Can we use nuclear fusion on Earth? Why or why not?
Answer:
Explanation:
No
This protein takes oxygen from hemoglobin in order to
O break down stored fats for energy.
O transport water-insoluble lipids in the bloodstream.
transport oxygen from the lungs to tissues around the body.
O store it for muscle cells.
Answer:
i'm pretty sure it's 'transport oxygen from the lungs to tissues around the body'
Answer:
Transportation of Oxygen from Lungs to Tissues