Answer:
b nitrogen&oxygen
Explanation:
i'm built different
ayo, have some points
Answer:
aha thank you :)
Explanation:
Answer:
thank you :)
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
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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help me its is hard..
Answer:
800 kJ
Explanation:
Answer:
800 kj
Explanation:
the line is at 800
The larger the wavelength the shorter the frequency.
True or false
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
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
Answer:
Lifted fault block mountains
Explanation:
Justify the placement of element II (Chlorine), on the periodic table, within its group and period.
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?
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.
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.
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
The only way animals can get energy is by
eating what three nutrients?
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:
The velocity of an object in motion at a specific instant point in time is known as __________.
average velocity.
instantaneous velocity.
1. Which is not a characteristic of a compound?
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.
If you start with 14.0 grams of diatomic nitrogen (N2) how many grams of diatomic hydrogen (H2) will react with it?
Answer:
I just need points
Explanation:
whegehhwjwjwhehebebejeuhebehejejbebe
1. How did you model mutations in this project?
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:
Substances that can be drawn into wires without breaking are
why is a rise in sea level significant?
Answer:
I honestly dont know but its cool problably from water fill or from the waves going to much
Explanation:
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
Answer:I think it’s y sorry if I’m wrong
Explanation:
Answer:
i think it might be y
Explanation:
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!
Answer:
the answer is b
Explanation:
write all products and relevant tests and observations when KOH reacts with NH4NO3
Answer:
get a bucket and a mop that's a wap that's wap I'm talking wobble wobble wobble that's a wap
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.
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.
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?
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]
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
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
Answer:
D. Genes received from the offsprings parents.
Explanation:
what statements are true about Volume
Answer:
B,C,D
Explanation:
Hope this helps.
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:
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
Double bonds are formed when atoms share four electrons. true or false
Answer:
That's is true maybe I'm not sure check your book
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
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.
Which is the correct Lewis dot structure for BeH2 ?
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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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
Answer:
Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
Explanation:
Write the balanced chemical equation for the complete combustion of C10H22.
Explanation:
2 C10 H 22 + 31 O 2 → 20 CO 2 + 22 H20
Which of the following samples of water will contain the most heat?
А-1 KL of water at 20°C
B- 1 kL of water at 70°C
C- 1 mL of water at 50°C
D- 1 mL of water at 80°C
Answer:
The answer is D- make sure you give good rate