The atomic weight of Aluminum (AL) is 26.98. It has 14 neutrons. Aluminum has an atomic number 13. Therefore, option B is correct.
What is atomic number?The atomic number of an element represents the number of protons in the nucleus of its atoms. Since the atomic number of an element is unique and determines its position in the periodic table, aluminum has an atomic number of 13.
The number of electrons in a neutral atom is equal to the number of protons, which in this case is 13. Therefore, aluminum has 13 electrons.
The atomic weight of aluminum (Al) is 26.98, which represents the weighted average mass of all the naturally occurring isotopes of aluminum, taking into account their relative abundances. The number of neutrons in an atom of aluminum is given as 14.
Thus, the correct option is B.
To learn more about the atomic number, follow the link:
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10. Electromagnetic waves used to examine broken bones inside the body are called
The answer to your question are X-Rays.
We use this all the time when we have broken bones in our skeletal system!
Answer:
it would be x-rays
Explanation:
To fight a bacterial infection, a patient was given an antibiotic to take for 10 days.
After the patient finished taking the antibiotics as directed, almost all the bacteria
were killed. After another 10 days, the patient was sick again with the same type of
infection. What most likely happened?
A. A few bacteria survived the antibiotics and stopped reproducing
B. Some bacteria were resistant to the antibiotic,and they reproduced
C. The antibiotic slowed the life cycle of the bacteria
D. The patient’s high fever inactivated the antibiotic,allowing the surviving bacteria to grown rapidly
Answer: B
Explanation: trust me
pls that is the picture
What are homogeneous mixture and heterogeneous mixture ?
Explanation:
"A homogeneous mixture has the same proportions of its components throughout any given sample and is also referred to as a solution. Conversely, a heterogeneous mixture has components of which proportions vary throughout the sample."
- Wikipedia
Question 14 Multiple Choice Worth 2 points) If we have less power, we most likely have
A. the same amount of work being done over a shorter period of time
B.more work done over a shorter period of time
C. more work done over the same amount of time
D.the same amount of work being done over a longer period of time
Answer:
D.
Explanation:
makes most sense for this question. when you're using the same amount of power over a longer period–you're bound to have less of it over time.
An area experiences lack of moisture and precipitation. It also experiences high temperature and winds. Which severe weather event is likely to occur?
Answer:
Drought
Explanation:
It would get really dry because no moisture and the lakes would dry up bc of lack of water
need help with this science question............
Answer:
18- H
19- D
20-G
21-A
(i think these are the answers)
Explanation:
whats the reason you can float a paperclip on water?
Answer:
because it is not a rock and it is not thick so it can float
Explanation:
because it is thin and light
Why is it important to use scientific notation when talking about our solar system
and galaxies?
Answer:
The main purpose for converting numbers into scientific notation is to make calculations with surpisingly large or small numbers less complicated. Since zeros are not used to place the decimal point, all of the digits in a number in scientific notation are meaningful and easier to read. Hope this helps!
Explanation:
In your opinion, would there be a difference in your wieght in Baguio and in Manila ?
Why or Why not
Answer:
My wife and I just visited the City of Baguio for a week. We stayed at the Hotel Supreme Convention, which was very nice. We ate dinner at some really nice places: Mario's (expensive), Don Henrico's (mid), and Good Taste (cheap). We found a nice bar called the Old Bohemian for good live music. We ventured out toward Camp John Hay a couple of times for shopping(the commissary is a tourist trap with retail prices). We also did some street shopping.
Explanation:
My wife and I just visited the City of Baguio for a week. We stayed at the Hotel Supreme Convention, which was very nice. We ate dinner at some really nice places: Mario's (expensive), Don Henrico's (mid), and Good Taste (cheap). We found a nice bar called the Old Bohemian for good live music. We ventured out toward Camp John Hay a couple of times for shopping(the commissary is a tourist trap with retail prices). We also did some street shopping.
Answer:
Why would there be a difference in weight if you live in a different place?Explanation:
[tex]--------------------------------------------[/tex]
If you lived in Manila or Baguio, how would your weight change? It would probably depend on what they are eating, how long they exercise, but not living in a different place, right? This is mind - boggling and i don't know what you mean or if you're asking a different question.
[tex]--------------------------------------------[/tex]
Hope this helps! <3
[tex]--------------------------------------------[/tex]
what are 4 sources of electrical energy?
Answer:
Clean Energy. Learn more about energy from solar, wind, water, geothermal, biomass and nuclear. Fossil. Learn more about our fossil energy sources: coal, oil and natural gas.Electric Power. Learn more about how we use electricity as an energy source. Energy Storage. Hydrogen & Fuel Cells.Explanation:
I hope this helps xD
Answer:
Electrical energy is used to power up a light bulb. The current moves from the outlet to the light bulb through the wire.
Lightning is another example of electrical energy. The negatively charged particles are separated from the positively...
Batteries are also sources of electrical energy. In car batteries, the moving charges Explanation:
fI gave u 3 think of the 4th one
Anna is conducting an experiment how rather affects cell phone reception. Which of the following is the best answer
Answer:
You did not provide any details about the experiment, nor provided any answers for us from which to choose "the best answer" from. Please refine your question next time.
Explanation:
How many grams of F2 are in 3.45 x 1022 molecules of F2?
Answer:
Mass = 2.16 g
Explanation:
Given data:
Number of molecules of F₂ = 3.45 × 10²²
Mass in gram = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
3.45 × 10²² molecules ×1 mol / 6.022 × 10²³ molecules
0.57× 10⁻¹ mol
0.057 mol
Mass in gram :
Mass = number of moles × molar mass
Mass = 0.057 mol × 37.9 g/mol
Mass = 2.16 g
HELPPPPPPPPP 35 POINTSSSSSS!!!!!FILL IN THE BLANKS with either "reduce" or "oxidize"
Magnesium is able to ——copper, and copper is able to —— magnesium.
Zinc is able to—— magnesium, and magnesium is able to—— zinc.
Copper is able to—— zinc, and zinc is able to—— copper.
Look at my screenshot:
what is the empirical formula of vitamin A ( C=83.85, H=10.56, O=5.58)
The empirical formula of vitamin A : C₂₀H₃₀O
Further explanationThe empirical formula is the smallest comparison of atoms of compound =mole ratio of the components
The principle of determining empirical formula
Determine the mass ratio of the constituent elements of the compound. Determine the mole ratio by dividing the percentage by the atomic massmol ratio of C : H : O ⇒
[tex]\tt \dfrac{83.85}{12}\div \dfrac{10.56}{1}\div \dfrac{5.58}{16}\\\\6.9875\div 10.56\div 0.34875\rightarrow divide~by~smallest(0.34875)\\\\20\div 30\div 1[/tex]
Which is associated with low humidity? *
dry air
warm air
rainforest
coastal area
Answer:
A: dry air
Explanation:
Trust me this is right, I’m doing the exam rn and if its not right I will come back and edit this.
Answer:
guy above me is right
Explanation:
100% on quiz
More water is evaporated by oceans than is returned to them by precipitation. What is the source of the balance of the water?
Answer:
Following are the solution to this question:
Explanation:
Evaporate involves pushing to liquid from either a liquid phase. It's used passively, like in the overnight loss of moisture, and aggressively, as in the substrate loss of moisture by the light. The vaporized water is coming from the sea, but only 77% of the precipitation occurs and over the ocean as well as the remaining rain falls over land. Groundwater and rainwater are the primary sources of water.
What else is produced when sodium carbonate decomposes?
Na2CO3 → Na2O + _________
Answer:
CO2
Explanation:
A. What is the frequency of light that has a wavelength of 6.2 x 10^-7 m?
B. Identify the color of this light.
C. Calculate the amount of energy given off by this atom.
Answer:
I think the answer is letter C
one beaker contains nacl and another sugar, describe an experiment you could conduct to find the contents
Explanation:
Hi! I don't know why I am not getting any brainliest answer and if you are kind enough could you please mark me as the brainliest answer and please follow me also.
shivering when your cold generate heat to warm your body which characteristic of life does the refer to
Answer:
Your body needs to keep a core temperature of about 98.6°F (36.9°C). To prevent hypothermia and other consequences of a chilled core, your brain monitors temperature very closely.
Explanation:
What reaction shows a compound breaking apart into separate substances?
A. A single-replacement reaction
B. A synthesis reaction
C. A double-replacement reaction
D. A decomposition reaction
Answer: The answer is decomposition reaction
Explanation: Hope this helps:)
Answer: D. decomposition reaction
Explanation:
The chemical formula for magnesium oxide is MgO. A chemist determined by measurements that 0.030 moles of magnesium oxide participate in a chemical reaction. Calculate the mass of magnesium oxide that participates.
Answer:
1.209g of MgO participates
Explanation:
In this problem, we have 0.030 moles of MgO that participates in a particular reaction.
And we are asked to solve for the mass of MgO that participates, that means, we need to convert moles to grams.
To convert moles to grams we need to use molar mass of the compound:
1 atom of Mg has a molar mass of 24.3g/mol
1 atom of O has a molar mass of 16g/mol
That means molar mass of MgO is 24.3g/mol + 16g/mol = 40.3g/mol
And mass of 0.030 moles of MgO is:
0.030 moles MgO * (40.3g/mol) =
1.209g of MgO participatesWhich component of solution is dissolving medium? a.solute b.solvent
Answer:
Solvent
Explanation:
A 4.03 g sample of nitrogen gas has a volume of 921 milliliters at a pressure of 3.19 atm. The temperature of the N2 gas sample is:_____.
Answer:
249 K
Explanation:
Step 1: Given data
Mass of nitrogen (m): 4.03 gVolume of the gas (V): 921 mL = 0.921 LPressure of the gas (P): 3.19 atmStep 2: Calculate the moles corresponding to 4.03 g of nitrogen
The molar mass of N₂ is 28.01 g/mol.
4.03 g × 1 mol/28.01 g = 0.144 mol
Step 3: Calculate the temperature of the gas sample
We will use the ideal gas equation.
P × V = n × R × T
T = P × V / n × R
T = 3.19 atm × 0.921 L / 0.144 mol × 0.0821 atm.L/mol.K
T = 249 K
What mass of lithium phosphate (Li3PO4) is needed to prepare 500 mL (0.500 L) of a solution having a lithium ion concentration of 0.125 M?
a. 2.41 g
b. 6.75 g
c. 10.1 g
d. 19.3 g
e. 30.4 g
Answer:
a. 2.41 g
Explanation:
First we calculate the number of lithium ion moles (Li⁺) in the solution, multiplying the concentration times the volume:
500 mL ⇒ 500 / 1000 = 0.500 L
0.125 M * 0.500 L = 0.0625 mol Li⁺Then we convert moles of Li⁺ to moles of Li₃PO₄, keeping in mind that for each mole of Li₃PO₄ there are 3 Li⁺ moles:
0.0625 mol Li⁺ * [tex]\frac{1molLi_3PO_4}{3molLi^{+}}[/tex]= 0.02083 mol Li₃PO₄Finally we convert Li₃PO₄ moles to grams, using its molar mass:
0.02083 mol Li₃PO₄ * 115.79 g/mol = 2.41 gThe mass of lithium phosphate, Li₃PO₄ required to prepare the solution is 2.41 g
The correct answer to the question is Option A. 2.41 g
We'll begin by calculating the concentration of Li₃PO₄. This can be obtained as follow:
Li₃PO₄(aq) —> 3Li⁺(aq) + PO₄³¯(aq)
From the balanced equation above,
3 moles of Li⁺ is present in 1 mole of Li₃PO₄.
Therefore,
0.125 M Li⁺ will be present in = 0.125 / 3 = 0.0417 M Li₃PO₄.
Thus, the concentration of Li₃PO₄ is 0.0417 M
Next, we shall determine the number of mole of Li₃PO₄ in the solution.Molarity of Li₃PO₄ = 0.0417 M
Volume = 0.5 L
Mole of Li₃PO₄ =?Mole = Molarity x Volume
Mole of Li₃PO₄ = 0.0417 × 0.5
Mole of Li₃PO₄ = 0.02085 moleFinally, we shall determine the mass of Li₃PO₄ required to prepare the solution.Mole of Li₃PO₄ = 0.02085 mole
Molar mass of Li₃PO₄ = (3×7) + 31 + (16×4) = 116 g/mol
Mass of Li₃PO₄ =?Mass = mole × molar mass
Mass of Li₃PO₄ = 0.02085 × 116
Mass of Li₃PO₄ = 2.41 gThus, the mass of Li₃PO₄ required to prepare the solution is 2.41 g
The correct answer to the question is Option A. 2.41 g
Learn more: https://brainly.com/question/3126258
is chromate polar or nonpolar?
Answer:
i THINK so
Explanation:
im not sure tho sorry if wrong
Help plz:))) I’ll mark u brainliest ASAP 10 points
which formula represents a nonpolar molecule containing polar covelant bond
Answer: H2O and NH3 are polar molecules. H2 is a nonpolar molecule but the H-H bond is also nonpolar.
Therefore, the best choice is CCl4. Although the C-Cl bond is polar due to electronegativity differences, the molecule itself is nonpolar because the net dipole moments cancel out, given its tetrahedral molecular structure.
Explanation:
Plzzzz help right answer gets a brainly!
Answer: 4
Explanation: Your counting 4 for each interval. 9+4 =13 13+4 =17 17+4 =21 and so on.