Answer:
hi
Explanation:
The following diagram shows a view of earth . What do the arrows represent
Answer:
how the earth rotates
Explanation:
Answer:
The Diagram shows Earth's rotation! ^^
Explanation:
Orbit and revolution is when the Earth goes around the sun and I'm sure it's not seasons because seasons isn't a movement of Earth.
what is hybridization
HYBRIDIZATION:
Hybridization is the idea that atomic orbitals fuse to form newly hybridized orbitals, which in turn, influences molecular geometry and bonding properties. Hybridization is also an expansion of the valence bond theory.Answer:
Hybridization is the idea that atomic orbitals fuse to form newly hybridized orbitals, which in turn, influences molecular geometry and bonding properties. Hybridization is also an expansion of the valence bond theory
Please help me with this question.
Answer:
B or c
Explanation:
It might bee
What is the enzyme that breaks down sugar ??
Answer:
sucrase-isomaltase
Explanation:
How many moles are contained in 539.2 grams of Al(NO3)3
Answer; 2.531 moles
Explanation:
002 (part 1 of 2) 10.0 points For :393 g of butadiene (C,11,) calculate the number of moles. Answer in units of mol.
Answer:
7.27 mol C4H6
Explanation:
To calculate moles, divide the molar mass by the grams given
To find molar mass, add the atomic mass of the elements
12.011*4 + 1.008*6 = 54.092 g/mol
393 g * 1 mol/54.092 g = 7.265 mol
List four factors that affect precipitation
Topic scowmce
Precipitation.
Humidity is the amount of water vapour in the air. This is produced by the evaporation
of water from oceans, lakes, rivers, wetlands and plants.
When water evapour in the air cools, it condenses. In other words, it becomes liquid and
forms little drops. These droplets form clouds.
When the droplets are small, they remain suspended in the atmosphere. But they often
become colder and their size and weight increases When they become too heavy to
remain suspended in the air, they fall to the Earth’s surface. We call this precipitation,
which may be rain, snow or hail.
Factors affecting precipitation.
Different areas of the Earth’s surface receive different amounts of precipitation.
Latitude: it rain more in the areas near the equator than in the temperature
zones and polar regions. The temperature is higher near the Equator so there is
more evaporation.
Altitude: it rains more in high areas than in low areas.
Level of humidity: it rains more on the coast than inland. Seas are a source of
humidity.
Precipitation is measured in millimeters (mm) per square matre.
how many grams of H2O are in 3.00 moles of H2O?
Answer:
mole=mass/molarmass
Explanation:
molar mass of h2o=18
How many moles of water are produced from the reaction of oxygen with four moles of propane (C3H8)? C3H8 + 5O2 --> 3CO2 + 4H2O
Answer:
Explanation:
The reaction is:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
We see, that the equation is ballanced.
As we have data from only one reactant, we assume the other is in excess.
Ratio is 1:4 (stoichiometry). We solve this, by a rule of three:
1 mol of propane can produce 4 moles of water
Then, 4 moles of propane, may produce
( 4 . 4 ) /1 = 16 moles of water can be made.
Remember, we always have to work with the limiting reactant.
What does the MC1R gene code for
Answer:
The MC1R gene provides instructions for making a protein called the melanocortin 1 receptor. This receptor plays an important role in normal pigmentation. The receptor is primarily located on the surface of melanocytes, which are specialized cells that produce a pigment called melanin.
Explanation:
#hope this help
1. What mass of Mgo will I make from 48 g of Mg?
2Mg + O2 + 2MgO
Answer:
80.6 g
Explanation:
MgO=24.3+16=40.3 g
48.6/24.3= 2 moles
64/2x16= 2 moles
2x40.3= 80.6g
50 pts! Please help, much appreciated (:
2. Consider the table of boiling points and structural isomers. Note that butane has two possible isomers but that decane has 75 possible isomers. Why does the number of possible isomers go up with an increasing number of carbon atoms?
Answer:
because the number of constitutional confirmation , and geometric isomers goes up with each carbon atom added there are many more possible configurations and connectivities possible with decane , a 10 carbon chain , than with butane, a 4 carbon chain
"The number of possible isomers go up with an increasing number of carbon atoms because as the number of carbon atoms increases the tendency to form branching with other carbon atom increases as well."
What is isomer?
Isomers are molecules or polyatomic ions that have the same molecular formulas that is, the identical number of atoms of each element but different atomic configurations in space. Isomerism refers to the existence or potential of isomers. Isomers don't have to have the same chemical or physical properties.
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An effective treatment for some cancerous tumors involves irradiation with "fast" neutrons. The neutrons from one treatment source have an average velocity of 3.5×107 m/s. If the velocities of individual neutrons are known to within 2.0% of this value, what is the uncertainty in the position of one of them?
Answer:
4.54 * 10^-14 m
Explanation:
From Heisenberg's uncertainty principle, we can write;
Δp.Δx ≥ h/4π
Given that;
Δp =Δmv
So;
Δmv.Δx ≥h/4π
Δmv =2/100(3.5×10^7 m/s * 1.66 * 10^-27)
Δmv =1.162 * 10^-21 Kgms-1
Δx ≥6.63 * 10^-34 /4 * 3.142 * 1.162 * 10^-21
Δx ≥4.54 * 10^-14 m
How does fog rising off water compare to plant growth?
The humidity in the air affects the evapotranspiration rate from the leaf surfaces. ... The use of fog and mist at this time can reduce the air temperature and increase the humidity within the plant canopy without saturating the plant medium. With more oxygen in the root zone, faster rooting occurs.
16. Keesha performed a chemical reaction, and the products looked quite
different from the reactants. She knew the amount of matter had not
changed due to the law of conservation of mass. According to the law of
conservation of mass, what happens in a chemical reaction? *
Answer:
it's the third one
Explanation:
matter can't change, but mass can differ
AgNO3 ionic or covalent
Answer:
what i need more details
Explanation:
Answer:
Ionic
Explanation:
AgNO3 is also highly soluble in water. Ionic means that the compound is composed of ions.
A screw decreases the amount of work done.
True
False
Answer:
tru
Explanation:
Dr. Thomas was doing laundry and accidentally knocked over the entire bottle of liquid laundry detergent (true story!). What would be the best substance to use to help clean up the spill?
Group of answer choices
(Hint) Detergent is a base.
A) lemon juice
B) bleach
C) baking soda
D) water
A.S.A.P
1.25 x 10^12 molecules H2SO4 to moles
2.08 × 10⁻¹² mol H₂SO₄
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
1.25 × 10¹² molecules H₂SO₄
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.25 \cdot 10^{12} \ molecules \ H_2SO_4(\frac{1 \ mol \ H_2SO_4}{6.022 \cdot 10^{23} \ molecules \ H_2SO_4})[/tex]Multiply/Divide: [tex]\displaystyle 2.07572 \cdot 10^{-12} \ moles \ H_2SO_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2.07572 × 10⁻¹² mol H₂SO₄ ≈ 2.08 × 10⁻¹² mol H₂SO₄
Which of the following is an example of mutualism?
Answer:The relationship which is between bacteria and ungulates with the intestine is or good example of mutualism. Mutualism plays an important role in ecology. We can say that if we measure the exact fitness what we get as a benefit is a mutualistic relationship.example of a mutualistic relationship is that of the oxpecker (a kind of bird) and the rhinoceros or zebra. Oxpeckers land on rhinos or zebras and eat ticks and other parasites that live on their skin. The oxpeckers get food and the beasts get pest control.
Explanation:
hope this helps have a nice night❤️❤️❤️❤️
Explanation:
a human uses dog to protect a flock of sheep
What is the amount of aluminum chloride produced from 40 moles of chlorine and excess aluminum?
Answer: Molar mass of Al = 26.98 g/mol
mass of Al = 12 g
mol of Al = (mass)/(molar mass)
= 12/26.98
= 0.4448 mol
According to balanced equation
mol of AlCl3 formed = moles of Al
= 0.4448 mol
Answer: 0.445 mol
hope this help boo❤️❤️❤️
Explanation:
Which characteristic is a behavior adaptation in birds?
of course migration
Explanation:
if you need help again i'll be there.
Answer:
yea its migration
Explanation:
Name 5 things that the periodic table includes about 1 atom for each element:
1.
2.
3.
4.
5.
Answer:
They are listed below
Explanation:
The 5 things that the periodic table includes are;
1. Name of the element
2. The symbol of the element
3. Atomic number of the element
4. Relative atomic mass
5. Electron configuration
The Beryllium (Be) atom has 4 protons, 4 electrons (2 valence e- ), and 5 neutrons. It is on the 2nd period, so it has two electron shells
(diagram below)
1. has two electron shells, so draw two rings around the nucleus
2. has 4 electrons, and since the first shell always has two the second shell would have 2 as well (to add up to four). this makes sense, because the description says that Be has 2 valence electrons
3. Draw 4 protons inside the grey circle (the nucleus)
4. Draw 5 neutrons inside the grey circle too (the nucleus)
they don't have to be in any particular order, hope this helps!
Beryllium (Be) atom has 5 neutrons, 4 electrons and 4 protons. It has two electron shells as it is in the second period of the periodic table.
Only two electrons can fit in the first shell, which is the innermost shell. Beryllium has two electrons in its initial shell. There are additionally 2 electrons in the second shell, which is the outermost shell for beryllium. Valence electrons are the moniker for these outermost electrons.
The electron configuration of beryllium is 1s² 2s², where the superscript refers to the number of electrons in each orbital and shell. The two electrons in the 1s orbital of the first shell are denoted by the symbol 1s², while the two electrons in the 2s orbital are denoted by the symbol 2s².
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What is the correct hybridization for a ion of IF6 that has a charge of (1-)
Answer:
6 F atoms at 6 corners
Explanation:
The shape of IF6 (-1) is trigonally distorted octahedron. The central iodine atom has 7 valence electrons. It gains one electron from negative charge. Out of 8 electrons, 6 are imvolved in formation of 6 I - F bonds and one lone pair of electrons is present. 6F atoms are present at 6corners of distorted octahedron. The lone pair of electrons distorts the octahedral shape due to electron repulsion.
The useful energy a light bulb gives out is
(a). kinetic energy (b) chemical energy (c) light energy
science subject
Answer:
Light bulb gives light energy which is usefull
Answer:
(c) light energy
Explanation:
As bulb is used for giving light and hence the energy that it gives is light energy.
How many Noble gases are there?
Answer:
six noble gases
Here are five of the six noble gases: helium, neon, argon, kypton and xeon. They're all colourless and transparent. Krypton and xeon form compounds only with difficulty. Helium, neon and argon don't form compounds at all.
Answer:
There are in total 6 noble gases in the periodic table.
Namely,
1. Helium
2. Neon
3. Argon
4. Krypton
5. Xenon
6. Radon
covalent compounds contain
Answer: Covalent compounds have bonds where electrons are shared between atoms. Due to the sharing of electrons, they exhibit characteristic physical properties that include lower melting points and electrical conductivity compared to ionic compounds.
hope this helps!
Explanation:
what is the product for the synthesis reaction Na+O2
1-NaO
2-NaO2
3-Na2O
4-Na3O2
5-Na2O3
6-Na2O2
This is an unbalanced equation representing a chemical reaction HgO->Hg+O2 (two is supposed to be small and on the bottom right part of the O) Which equation is the correctly balanced chemical equation for this reaction? A. HgO->Hg+20 (and a tiny 2 next to the 20) B. 2Hgo->Hg+0 (and a tiny 2 next to the 0) C. 2HgO->2Hg+0 (and a tiny 2 next to the 0) D. 2Hgo->Hg+20 (and a tiny 2 next to the 20)
Answer: C. [tex]2HgO\rightarrow 2Hg+O_2[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The skeletal chemical equation will be:
[tex]HgO\rightarrow Hg+O_2[/tex]
The balanced chemical equation will be:
[tex]2HgO\rightarrow 2Hg+O_2[/tex]
The correctly balanced chemical equation for the reaction [tex]HgO - > Hg + O_{2}[/tex] is: C. [tex]2HgO - > 2Hg + O_{2}[/tex]
The law of conservation of mass states that mass can neither be created nor destroyed; it can only be transferred from one location to another. As a result, the mass of the products is required to be the same as the mass of the reactants.
On both the reactant and product sides of the reaction, the identical amount of atoms of each element is required. Therefore, the equations used in chemistry are balanced.
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