Answers
Answer:
B
A
C
Explanation:
Related Questions
Which is the correct Lewis dot structure for BeH2 ?
Answers
Since there are 4 valence electrons in total, Beryllium has 2 and Hydrogen has 2. You would put the Be in the middle because there is only 1 of them.
The correct Lewis dot structure for [tex]BeH_2[/tex] is Be : H : H
What does the Lewis dot structure show?The Lewis dot structure shows the valence electrons as dots. The valence electrons of beryllium are shown as 2 dots on the left side of the atom.
The central atom, beryllium, has 2 valence electrons where each hydrogen atom has 1 valence electron. To form a stable molecule, beryllium shares its 2 valence electrons with the 2 hydrogen atoms, each of which shares its 1 valence electron with beryllium which gives each atom a full outer shell of electrons.
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What does the salinity of sea water represent?
the concentration of salt dissolved in the ocean
A.the concentration of all
B. dissolved chemicals in the ocean
C. the volume of salt in the ocean
D.the mass of salt in the ocean
PLEASE GIVE ME THE RIGHT ANSWER!
Answers
Answer:
the answer is b
Explanation:
Justify the placement of element II (Chlorine), on the periodic table, within its group and period.
Answers
help me its is hard..
Answers
Answer:
800 kJ
Explanation:
Answer:
800 kj
Explanation:
the line is at 800
What is the mass and volume of the nucleus relative to the size of the atom?
Answers
Answer:
The atom with the smallest mass is the hydrogen atom; its mass is about 10-27 kg. The masses of other atoms go up to about 200 times this. The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom.
How many moles are in a sample of 9.47 x 1024 atoms of argon (Ar)? (Show your calculations for full credit. Correct answers will only receive partial credit.)
Your answer:
Answers
Answer:
15.73 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{9.47 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 15.730897...[/tex]
We have the final answer as
15.73 molesHope this helps you
Answer:
15.7 moles of Ar
Explanation:
Given data:
Number of atoms = 9.47 ×10²⁴ atoms
Number of moles of Ar = ?
Solution:
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 atoms
9.47 ×10²⁴ atoms × 1 mole / 6.022 × 10²³ atoms
1.57×10¹ mol
15.7 mol
The velocity of an object in motion at a specific instant point in time is known as __________.
average velocity.
instantaneous velocity.
Answers
21 III
Choose the geologic formation that fits the description: rocks are stretched, moved
vertically into blocks, and dropped; the lower blocks are called graben and the taller
blocks called horst.
O volcanic mountains
O ocean ridges
O fault block mountains
folded mountains
Answers
Answer:
Lifted fault block mountains
Explanation:
5. The compound is called:
*
(1 Point)
VP2
Vanadium (1) phosphide
Vanadium (IV) phosphide
Vanadium phosphide
Vanadium (VI) phosphide
Vanadium (V) phosphide
6. The compound is called
Answers
Answer:
Vanadium (VI) Phosphide
Explanation:
Vanadium has a 6+ charge for this compound, so there needs to be two phosphorus atoms to satisfy the charges. This is an ionic compound as well so the roman numerals need to be present.
evanrosario11 avatar
evanrosario11
7 minutes ago
Physics
High School
100 Points + Brainlest PLZ HElP
What ion would each of the following elements form?
For example, a sodium atom (Na) will form a sodium ion (Na+1). You will need to list the charge of the ion. You will need to list the charge of the ion for the seven questions below.
1. Beryllium (Be)
2. Sulfur (S)
3. Potassium (K)
4. Aluminum (Al)
5. Bromine (Br)
6. Oxygen (O)
7. Magnesium (Mg)
Answers
Answer:
Forming positive ions
Explanation:
A sodium atom has one electron in its outer shell. ... It will still have 11 positive protons but only 10 negative electrons. So, the overall charge is +1. A positive sign is added to the symbol for sodium, Na +.
Hope it helps
xoxo
Explanation:
Forming Positive Ions
Hope It Helped U
What are valence electrons? The number of neutrons in a nucleus. The number of protons in the nucleus. The atomic mass is the same as the number of valence electrons. The number of electron in the outer most shell of an atom.
Answers
Valence Electrons are The number of electrons in the outer most shell of an atom. These shells have a maximum amount before being filled by electrons, in which remaining electrons will fill the next remaining valence shell.
Zinc metal (Zn) reacts with hydrochloric acid (HCI) to produce hydrogen gas (H) and zinc chloride (ZnCl2). A scientist has powdered zinc and a chunk of zinc of equal mass. Available in the lab are dilute HCl and concentrated HCl. Which combination of zinc and acid would react most quickly? Explain why the combination you chose would make the reaction occur most quickly.
Answers
Answer:
hello I am interested in the position and would like to know if you have any questions please feel free to contact me at any time if
what statements are true about Volume
Answers
Answer:
B,C,D
Explanation:
Hope this helps.
The only way animals can get energy is by
eating what three nutrients?
Answers
Most animals obtain their nutrients by the consumption of other organisms. At the cellular level, the biological molecules necessary for animal function are amino acids, lipid molecules, nucleotides, and simple sugars. However, the food consumed consists of protein, fat, and complex carbohydrates.
Answer:Most animals obtain their nutrients by the consumption of other organisms. At the cellular level, the biological molecules necessary for animal function are amino acids, lipid molecules, nucleotides, and simple sugars. However, the food consumed consists of protein, fat, and complex carbohydrates.
Explanation:
1. Which is not a characteristic of a compound?
Answers
Answer:
Just look at which one it doesn't show.
Explanation:
Characteristics of compounds
1. Components in a compound are present in a definite proportion.
2. It has a homogeneous composition.
3. Particles in a compound are of one kind.
4. A compound is made up of one or more atoms of the same or different elements.
5. In a compound the elements are present in a fixed ratio by mass.
6. A compound can be divided into simpler substances by a chemical process.
7. The physical and chemical properties of a compound are completely different from those of its constituents.
Substances that can be drawn into wires without breaking are
Answers
Some examples are gold, silver, copper, etc
A group of tourists were on an outing when they noticed that precipitation began to fall. The air temperature was 32 degree Fahrenheit. What type of precipitation did they most likely see?
Answers
Answer:
The correct answer is - rain.
Explanation:
At 32 degrees c or zero degrees Celsius, droplets of water in the atmosphere do not freeze as it is not the temperature at which water freezes but it is the temperature at which ice melts.
At this temperature the water changes its state, below 32 degrees Fahrenheit the water freezes but in the atmosphere, it not freezes necessarily and remains in the liquid state and called super-cooled liquid or water. Above this temperature, water in liquid state.
Thus, the precipitation is in the form of rain.
0.45 g of hydrated sodium carbonate crystals were heated until 3.87 of anhydrous power remained.
How many moles of water are there in one mole of hydrated salt?
Answers
Formula of hydrated sodium carbonate : Na₂CO₃.10H₂O, so moles of water in one mole of hydrated salt = 10
Further explanationHydrate is a compound that binds water (H₂O), usually in the form of crystals/ solids
If these compounds are dissolved in water or heated, the hydrates can decompose:
Example: X.YH₂O (s) → X (aq) + YH₂O (l)
The formula for the hydrated compound contains: YH2O
The mole ratio shows the ratio of the coefficients of the hydrate compound
10.45 hydrated sodium carbonate(Na₂CO₃.xH₂O) were heated until 3.87 of 3.87of anhydrous (Na₂CO₃) remained, so
mass H₂O released :
[tex]\tt 10.45-3.87=6.58~g[/tex]
mass Na₂CO₃ = 3.87 g
mol ratio Na₂CO₃(MW= g/mol) : H₂O(MW=18 g/mol) =
[tex]\tt \dfrac{3.87}{105,9888}\div \dfrac{6.58}{18}=0.0365\div 0.3655=1\div 10[/tex]
The larger the wavelength the shorter the frequency.
True or false
Answers
Answer:
True
Explanation:
Answer:
false
Explanation:A high energy light will have a shorter wavelength than a low energy light. If the wavelength goes down, then the frequency goes up. When calculating energy in the equation, E=hv, frequency
Double bonds are formed when atoms share four electrons. true or false
Answers
Answer:
That's is true maybe I'm not sure check your book
WILL GIVE BRAINLIEST (major help!!! need now!!!) David observed properties of four different compounds, only one of which is an ionic compound. His observations are shown in the chart.
A 2-column table with 4 rows. The first column labeled compound has entries W, X, Y, Z. The second column labeled observations has entries is a hard solid, melts at 44 degrees C, has a molecular structure; is a brittle solid, does not conduct electricity in water, has a crystal structure; is a hard solid, conducts electricity, has a molecular structure; is a brittle solid, melts at 801 degrees C, has a crystal structure.
Which is most likely the ionic compound?
W
X
Y
Z
Answers
Answer:I think it’s y sorry if I’m wrong
Explanation:
Answer:
i think it might be y
Explanation:
Write the balanced chemical equation for the complete combustion of C10H22.
Answers
Explanation:
2 C10 H 22 + 31 O 2 → 20 CO 2 + 22 H20
fungi have eukaryotic cells (large cells with a nucleus), like animals and plants
True or false?
Answers
an atom has 11 protons, 12 neutrons, and 11 electrons. what is the charge of the atoms nucleus?
A) +11
B) -11
C) 0
D) 23
Answers
Answer:
Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
Explanation:
1. How did you model mutations in this project?
Answers
Answer:
Sorry hun i dont know but if u post a pic i might be able to help...Pls mark most brainliest by pressing the crown Hope u get an A have a nice day
Explanation:
Which phrase best describes a machine?
-any device that makes work easier
-any device that moves an object
-any device that has multiple parts
-any device that uses energy
Answers
The Statement that best describing a machine is "any device that makes work more easier" Hence Option (A) is correct.
What is a Machine ?A machine is generated by the intellect of Humans to make work more efficient and easier.
It is an invention which multiplies the effect of efforts of Human being in any task.
The machine produces a mechanical efficiency as well.
Therefore, The Statement that best describing a machine is "any device that makes work more easier" Hence Option (A) is correct.
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write all products and relevant tests and observations when KOH reacts with NH4NO3
Answers
Answer:
get a bucket and a mop that's a wap that's wap I'm talking wobble wobble wobble that's a wap
Help!!
The primary function of the chromosome is to—
A. Store the genetic instructions needed to specify traits
B. Release energy by breaking down food molecules
C. Transport waste materials rapidly out of the cell
D. Relay messages between different cells in animals
Answers
What determines the traits of offspring?A.Food sources that have been genetically engineered B.Literary metaphors and exciting connotations C.The pool of entries in the state lotto jackpot D.Genes received from the offspring's parents
Answers
Answer:
D. Genes received from the offsprings parents.
Explanation:
ayo, have some points
Answers
Answer:
aha thank you :)
Explanation:
Answer:
thank you :)
Explanation: