Answer:
the sun im not 100% sure but yes
Answer:
B. The Mantle
Explanation:
The mantle is the part of the earth that has convection currents.
What are mineral acids?
Answer:
mineral acids are obtained from one or more inorganic compounds which is a compound that lacks carbon and hydrogen bonds. Inorganic compound examples include water and carbon dioxide. Something all mineral acids do is form hydrogen ions and the joined together bases when it is dissolved in water.
Explanation:
Find the percent composition of chromium(|||) fluoride (CrF3), which is commonly used as a dye in textiles
Answer:
%Cr = 47.71%
%F = 52.29%
Explanation:
To do this, we need the atomic weights of all the elements in the chromiun fluoride, which are the following:
Cr: 51.996 g/mol
F: 18.998 g/mol
With these atomic weights, let's calculate the molecular mass of the chromium fluoride:
MM CrF₃ = (51.996) + (18.998 * 3) = 108.99 g/mol
Now, to get the percent composition, all we have to do is divide the atomic weight of each element by the molecular mass, and then, multiply by 100%:
% = (AW / MM) * 100
Replacing with each element:
%Cr = (51.996 / 108.99) * 100
%Cr = 47.71%%F = 100 - 47.71
%F = 52.29%Hope this helps
What are periods on the periodic table? How many are there?
Write the formula for potassium nitride?
(show work)
CAN SOMEONE PLEASE HELP?
Answer:
It should b KNO3
Explanation:
one Potassium (K) and three Nitrite (NO3)
How is the rotation of the Sun different from the rotation of Earth?
OThe parts of the Sun rotate at different speeds and the parts of Earth rotate at the same speed.
O The Sun's equator rotates faster than its poles and Earth's equator rotates slower than its poles.
O The Sun's poles rotate faster than its equator and Earth's poles rotate slower than its equator.
O The parts of the Sun rotate in different directions and the parts of Earth all rotate in the same direction
Answer:
The Sun's equator rotates faster than it's poles and Earth's equator rotates slower than it's poles.
Explanation:
-
In the reaction: 2X2Y3 + 3Z(QR)4 4X(QR)3 + 3ZY2
What is the charge of the "X" cation needed to form these compounds?
Answer:
That's simple it's the caca of 54 32 x (5) b ÷ 5683jvl done so your answer is 0
Metal x combines with fluorine to form XF2. what compound does it form with the sulfate ion?
A. XSO4
B. X2SO4
C.X(SO4)2
Explanation:
The answer is A b/c
the polyatomic SO4² have 2 valance electron,also
the metal X also have 2 valance electron so,They cancel each other
I need help with this question ASAP
Answer:
I think its A)
Explanation: im not sure im sorry
describe nucleus of atom
Answer:
the nucleus is made up of protons and neutrons
Amoeba have the following metabolism.
A. Autotrophic
[tex] \huge \purple{\tt{Answer:}} [/tex]
a. Autotrophic
No attempt was made to test sodium with hydrochloric
acid. Why not?
Answer:
the reaction is violent and quick
Explanation:
[please answer fast!] If the hydroxide ion concentration is 2x10^-3 M, what is the pH of the solution? Show your working.
Answer:
pH = 11.30
Explanation:
pH is defined as -log [H⁺]
To find [H⁺] from [OH⁻] -Concentration of hydroxide ion-, we must use the equilibrium of water:
H₂O(l) ⇄ H⁺(aq) + OH⁻(aq)
Keq = 1x10⁻¹⁴ = [H⁺] [OH⁻]
[H⁺] = 1x10⁻¹⁴ / [OH⁻]
[H⁺] = 1x10⁻¹⁴ / 2x10⁻³M
[H⁺] = 5x10⁻¹²M
pH = -log (5x10⁻¹²M)
pH = 11.30
The solubility of substance (Z) is 40g/100ml of water at 25°C. A)Can you
make a saturated solution if you add 120 g. of (Z) to 450ml of water at
25°C?
-
can anyone help me?!!!??!?!
Answer:
No, It would be a unsaturated solution
Explanation:
The solubility of a compound gives us information about how a compound may dissolve or not in a determinate solvent.
In this case we have Z, which in 25 °C the solubility of this compound is 40g/100 mL water. This means that if we have 60 g of Z and try to dissolve it in 100 mL of water, only 40 g of Z will solve and the remaining 20 g will be in the water as precipitate or remaining solid.
Now if you just put 40 g of Z in 100 mL water, it will dissolve completely in water, and in this case, we have a saturated solution. A saturated solution is when you dissolve a determinated quantity of a solute in a determinated quantity of solvent, without remaining of solid or excess of solvent.
According to this explanation, we now have 120 g of Z. To make a saturated solution of Z with this quantity, well, let's do math. If 40 g dissolves in 100 mL, then 80 g would be 200 mL and 120 g would have to be 300 mL of water. But in this case, we have 450 mL of water, we have more than 300 mL, an excess of water, so, the 120 g will dissolve but it's dissolved in more than the needed quantity to be a saturated solution, therefore, we have an unsaturated solution of Z (more solvent than the needed).
Hope this helps.
Which type of model is described below? A scientist thinks of the inside of a tree as being like a giant straw that can suck up water A. Atomic model B. Physical model C. Mathematical model D. Conceptual model
Answer:
B. Physical model
Explanation:
Out of the four of them this is the one that makes the most sense
You are given 0.39 mol of niobium (Nb). How many grams of niobium do you have?
Answer:
36gNb
Explanation:
0.39 mol Nb*92.91g Nb/1 mol Nb=36 g Nb
how can you find the charge on po4
Answer:
Answer:
Explanation:
I hope it's helpful!
100 POINTS PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
i need this im struggling with my work
Explanation:
Last one and the first
Can someone please explain to me what a Ecologist does for a living? (Or daily in their career?)
ecologists look at relationships between nature, studying the interactions between humans, animal and plants.
Answer:
Ecologists focus on the relationship of organisms within their environment. Ecology is a branch of biology (biology is the study of life). Given the broad scope of ecology, there are multiple sub-disciplines that an ecologist can choose to focus on. Since all living things (plants, animals, microbes) depend on other living things and a healthy environment to survive, ecologists may specialize in one aspect of an ecosystem. Examples include terrestrial (land), aquatic (water), applied (concepts and principles of ecology), conversation (management of biodiversity), and evolutionary (evolution).
Explanation:
Brainliest plz
Calculate number of g H3PO3 formed from 53.6 g H2O react with excess PCl3?
PCl3 + H2O → HCl + H3PO3
81.3 g H₃PO₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Reaction Molar RatiosUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN - Unbalanced] PCl₃ + H₂O → HCl + H₃PO₃
↓
[RxN - Balanced] PCl₃ + 3H₂O → 3HCl + H₃PO₃
[Given] 53.6 g H₂O
[Solve] x g H₃PO₃
Step 2: Identify Conversions
[RxN] 3 mol H₂O → 1 mol H₃PO₃
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
[PT] Molar Mass of P - 30.97 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
Molar Mass of H₃PO₃ - 3(1.01) + 30.97 + 3(16.00) = 82.00 g/mol
Step 3: Stoich
[S - DA] Set up: [tex]\displaystyle 53.6 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})(\frac{1 \ mol \ H_3PO_3}{3 \ mol \ H_2O})(\frac{82.00 \ g \ H_3PO_3}{1 \ mol \ H_3PO_3})[/tex][S - DA] Multiply/Divide [Cancel out unit]: [tex]\displaystyle 81.3023 \ g \ H_3PO_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
81.3023 g H₃PO₃ ≈ 81.3 g H₃PO₃
ahh help, is it true or false?
for 50 points!! im having a bit of trouble haha
Answer:
answer 16.1.) bohr model used to predict bonding abilities2.) electrical charge attraction holds atom together3.) valence electrons are outermost electrons4.) electron cloud - where electrons are foundanswer 17.falsebecause atomic number are numbers of protons
the number of molecules present in 0.036g of water
Answer:
5
Explanation:
Which statements reflect the process of electrolysis? Check all that apply. Water is formed from ions of hydrogen and oxygen. The electrical reactions in a rechargeable battery can be reversed. The cathode becomes the electrode for reduction. The cathode takes on the metal deposits or layers. Decomposition of ores produces separated elements. Decomposition of ores produces low energy products.
Answer:
Decomposition of ores produces separated element.
Answer: it’s b, d, and e
Explanation: i just did it, hope this helps :)
Look at the image below:
Mid ocean ridge
Sea towe
Marie Sedie
Osta 7m
WORM
PC
hohe materieur
Tron
Orope
thenosphere
perduta
What type of plate boundary is shown here?
convergent
divergent
transform
Answer:
Divergent
20 words
Answer:
divergent...........................
Mg3N2+3H2O-3MgO+2NH3 If 17 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20°C and 0.989 atm?
Explanation:
what are the unit given for the questions
how many atoms are in each compound ?
PLEASE HELP ME!!! I AM DESPERATE!!!
What causes infrared light to hit the ground?
Answer: The water vapor, carbon dioxide, methane, and other trace gases in the earth's atmosphere absorb the longer wavelength. These are all reasons why infrared waves hit the ground.
The water vapor, carbon dioxide, methane, and other trace gases in the earth's atmosphere absorb the longer wavelength. These are all reasons why infrared waves a part of electromagnetic spectrum hit the ground.
What is electromagnetic spectrum?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
Learn more about electromagnetic spectrum,here:
https://brainly.com/question/23727978
#SPJ6
Explain how you can convert from the number of representative particles of a substance to moles of that substance.
Answer:
the number of representative contain in 1 mol of a substance equals to 6.o2x10^23 particles.Number of representative particles of a substance can be converted to moles of that substance by multiplying it by Avogadro's number as 1 mole=6.023 ×10²³.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
Learn more about Avogadro's number,here:
https://brainly.com/question/11907018
#SPJ2
Helppp
me plzzz!!!!
Answer:
Explanation:
The sound waves are bocing off the walls.
Analyze the definition of light-year. Why is it in space we use light-year to
measure distance? *
Answer:
Because the distance is too far to count with any other way
Explanation: