Answer:
10 electrons
There are 10 electrons in a Mg2+ ion
Explanation:
In triangle ABC,m angle C=90^ , m angle A=54^ , and CA = 10 centimeters . What is the length of overline AB to the nearest centimeter
Answer:
AB = 17 cm
Explanation:
NOTE: This is a mathematics question. Nevertheless, the answer to the question is given below
Please see attached photo for diagram.
The length of AB can be obtained as follow:
Angle A = 54°
Adjacent = 10 cm
Hypothenus = AB =?
Using the Cos ratio, we can simply obtain the length of AB as follow:
Cos A = Adjacent /
Cos 54 = 10 / AB
0.5879 = 10 /AB
Cross multiply
0.5879 × AB = 10
Divide both side by 0.5878
AB = 10 / 0.5878
AB = 17 cm
explain ocean acidification
Answer:
Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time, caused primarily by uptake of carbon dioxide (CO2) from the atmosphere
Explanation:
Answer:
Ocean acidification affects marine life
Acidification reduces the availability of carbonate ions in ocean water, which provide the building blocks these organisms need to make their shells and skeletons, significantly reducing the chances for their offspring to survive.
Explanation:
Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO. 2) from the atmosphere. The main cause of ocean acidification is the burning of fossil fuels.
how many grams of CaO will be made from 3 mol CaCO3 please help i’m marking brainliest!!!
Does anyone know any top brainly users that are good at chemistry?
Answer:
yes
Explanation:
Answer:
These people were ranked best at chemistry
Explanation:
help me get this right no links
Answer:
the rise and fall is the tides.
Help me get it right and no links
What is the pH of .038 M HCI?
Answer:
is simple apply formula dude.
Help please with the 2 questions i will mark you brainliest
Answer:
The first one would be "Both Mixtures and Compounds", while the second one would be "Solution 2 - Because she used more salt".
Explanation:
An element is made up of atoms, but to make a mixture or compound you are combining multiple elements. And when look at the second question, assuming they have the same amount of water, there is a higher ratio of salt in the second one, which would make it more concentrated.
The Drake Equation...
A: tells us how many aliens are likely in the universe.
B: assesses how many alien civilizations Earth could contact.
C: calculates how best Earth could contact alien life.
D: proves that Earth can't contact aliens at this time.
Answer:
The answer is B: assesses how many alien civilizations Earth could contact. the exact interpretation is how many alien societies exist and are detectable!
Explanation:
Define solubilty.
_________✰✰
Answer:
the ability for a given substance, the solute to dissolve in a solvent is solubility.
Answer:
the ability for a given substance, the solute to dissolve in a solvent is solubility.
Which functional group contains two Carbon elements and one Oxygen element?
Aldehyde
Alcohol
Ketone
Ester
Answer:
Ester
Explanation:
Got it right on the quiz, hope this helps :)
En un tomo neutro el numero atomico es al numero de netrones como 7 es a 5 . si el numero de masa es 84. hallar el numero de electrones?
Answer:
49
Explanation:
Según la pregunta;
Relación de número atómico a número de neutrones = 7: 5
Debemos tener en cuenta que el número de neutrones = número de masa - número atómico.
Dado que el número total es 84
Sea el número atómico x
Por eso;
7/5 = x / 84 -x
7 (84 -x) = 5x
588 - 7x = 5x
588 = 5x + 7x
588 = 12 veces
x = 588/12
x = 49
Dado que número atómico = número de protones = número de electrones
El número de electrones = 49
How many manganese atoms are in
Ba(MnO4)2?
There are 2 manganese atoms are in Ba(MnO4)2.
Answer:
Explanation:
the top person of me is right bc i have all my notes here and they are right its 2 :)
how do you scale a recipe by changing the portion size
Answer:
You must change the size of each ingredient by the size of the product. Let's say my recipe calls for 1 bag of flower and 2 eggs. I want to double the amount of product that I make, so I must multiply each of my ingredients by 2. I would now use 2 bags of flower and 4 eggs.
He principal quantum number, n, represents the: a sub level of an electron b main energy level of a proton c main energy level of an electron d sub level of a proton
Answer:
c. main energy level of an electron
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are considered to be the building blocks of matter and as such defines or determines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these includes; protons, neutrons and electrons.
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
The principal quantum number, denoted by n, represents the main or overall energy level of an electron.
Basically, this property of an electron determines its energy level, as well as its distance from the nucleus of an atom of any chemical element. Also, as the distance of each orbital from the nucleus increases, the energy level increases respectively. Thus, sets of orbitals having the same principal quantum number (n) are generally referred to as an electron shell.
Help please!!!!!!!!!!!!
Answer:
D
Explanation:
Gases have low densities. Density is the mass of an object divided by its volume. Mass of gases are quite small. Since the mass is related to mass of the particles itself. However the volume is great since the gases are far apart due to how weak the forces of attraction are ( gases take the shape of the container which means they take up a good bit of space which means greater volume). A small mass divided by a large volume gives a small value (small density).
which statment explains the relationship between Earth's mantle and the outer core
A. the outer core is more dense and farther from the surface than the mantle
B. the outer core is more dense and closer to the surface the mantle
C. the outer core is less dense and closer to the surface than the mantle
D. the outer core is less dense and farther from the surface the. the mantle
Answer: A. the outer core is more dense and farther from the surface than the mantle
Explanation: There are two mantle‘s. But both of them are closer to the surface than the outer core. the outer core is the liquid layer outside of the inner core. The mantle is the next layer after the outer core. It goes: inner core, outer core, stiffer mantle, asthenosphere, ridged mantle, then the earth’s crust.
Help me get it right and no links
Answer: Natural Resources
Explanation:
The half-life of Co-60 is 5.3 years. If the initial mass of the sample is 1000g, how much will remain after 15.9 years?
Answer:
m_r = 125 g
Explanation:
Formula to calculate the remaining mass is;
m_i = m_r × 2^(t/λ)
Where;
m_i is initial mass of sample
m_r is remaining mass after time t.
t is time
λ is half life.
We are given;
m_i = 1000 g
t = 15.9 years
λ = 5.3 years
Thus;
1000 = m_r × 2^(15.9/5.3)
1000 = 8m_r
m_r = 1000/8
m_r = 125 g
what is the equation of CH3-CH=CH2 + Cl2 →
Answer: CH3CHClCH2Cl
Explanation:Equation is already balanced
Identify the limiting reactant when 24.5 g of H2 is made to react with 152.5 g of CO using the formula CO (g) +2H2 (g) --> CH3OH
Explanation:
1 mole of Carbon monoxide reacts with 2 moles of. Hydrogen gas ... use the mole ratio to determine the number of ... the coefficients of the balanced equation. 35.0 g Al mol Al. 26.98 g. Al.
PH CHEM, PLEASE HELP QUICK! NO LINKS/VIRUSES PLEASE!
A solution is created by measuring 3.60 x 10-3 moles of NaOH and 5.95 x 10-4 moles of HCl into a container and then water is added until the final volume is 1.00 L. What is the pH of this solution?
Answer:
The pH of the solution is 11.48.
Explanation:
The reaction between NaOH and HCl is:
NaOH + HCl → H₂O + NaCl
From the reaction of 3.60x10⁻³ moles of NaOH and 5.95x10⁻⁴ moles of HCl we have that all the HCl will react and some of NaOH will be leftover:
[tex] n_{NaOH}} = n_{i_{NaOH}} - n_{HCl} = 3.60 \cdot 10^{-3} moles - 5.95 \cdot 10^{-4} moles = 3.01 \cdot 10^{-3} moles [/tex]
Now, we need to find the concentration of the OH⁻ ions.
[tex] [OH^{-}] = \frac{n_{NaOH}}{V} [/tex]
Where V is the volume of the solution = 1.00 L
[tex] [OH^{-}] = \frac{n_{NaOH}}{V} = \frac{3.01 \cdot 10^{-3} moles}{1.00 L} = 3.01 \cdot 10^{-3} mol/L [/tex]
Finally, we can calculate the pH of the solution as follows:
[tex] pOH = -log([OH^{-}]) = -log(3.01 \cdot 10^{-3}) = 2.52 [/tex]
[tex] pH + pOH = 14 [/tex]
[tex] pH = 14 - pOH = 14 - 2.52 = 11.48 [/tex]
Therefore, the pH of the solution is 11.48.
I hope it helps you!
Will give brainliest please help!!
Answer:
I think it's B so maybe
The alignment of the Sun, Earth and Moon can produce shadows on the Earth or Moon
resulting in:
very long nights
equinox
solar and lunar eclipses
longer seasons
Answer:
SOLAR AND LUNAR ECLIPSEwrite the conclusion of coin and feather experiment.
Answer: In a vacuum, the objects fall at the same rate independent of their respective masses. That means coin and feather both reach ground at same time in a vacuum. Larger objects experience more air resistance than smaller objects. Also, the faster an object falls, the more air resistance it encounters.
Explanation:
You have 12.7 g of sugar in a sugar water solution. The percent by mass of the sugar is
15.8%, how many grams of solution are there?
Answer: Mass of solution is 80.4 g
Explanation: 15.8 % = 0.158. Mark mass of solution with x
You can make an equation for mass of sugar: 0.158 x = 12.7 g
x = 12.7 g / 0.158
Should I say sorry to a boy who was tryna steal my friends backpack as a joke and I was tryna kick his hand and I kicked his nose so now he is crying- and I may be in the ISI now
Answer:
No bro that bro had it coming he should have known when to stop
Explanation:
Answer:
Hmmmmmmm i think you should just not panic and you should just acept it even though it was an acedent
Explanation:
A 16 g sample of iron is heated from 0°C to 35°C absorbs 246.4 J of energy as heat what is the specific heat of this piece of iron
Answer: 0.44 j/g degrees Celsius
Explanation: i got the answer right on my test
Water can form a solution by mixing with:
Gases only
Solids and gases
Solids only
Solids, liquids, and gases
Explanation:
Solid, liquids and gases
Answer:
Solid, liquids and gases
Explanation:
How many oxygen atoms were used to write Felicia’s name?
Answer:
Explanation:
https://opentextbc.ca/introductorychemistry/chapter/molecules-and-chemical-nomenclature-2/