Answer:
B
Explanation:
The rock is physically weathered down and decreases in size.
What is the excess reactant of water?
Answer:
Hydrogen
Explanation:
An example of this can be In this example, hydrogen is the limiting reagent and oxygen is the excess reagent. The amount of product formed is limited by the amount of hydrogen.
Consider the reaction below. 2H2 O2 Right arrow. 2H2O How many moles of water are produced from 13. 35 mol of oxygen? 6. 675 mol 26. 70 mol 53. 40 mol 66. 75 mol.
Considering the reaction stoichiometry, the correct answer is second option: the total number of moles of water produced from 13. 35 mol of oxygen is 26.7 moles.
The balanced reaction is:
2 H₂ + O₂ → 2 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
H₂: 2 moles O₂: 1 mole H₂O: 2 molesThen you can apply the following rule of three: if by stoichiometry 1 moles of O₂ produce 2 moles of H₂O, 13.35 moles of O₂ will produce how many moles of H₂O?
[tex]amount of moles of H_{2} O=\frac{13.35 moles of O_{2} x2 moles of H_{2} O}{1 mole of O_{2}}[/tex]
amount of moles of H₂O= 26.7 moles
Finally, the correct answer is second option: the total number of moles of water produced from 13. 35 mol of oxygen is 26.7 moles.
Learn more about stoichiometry:
brainly.com/question/16487206?referrer=searchResults brainly.com/question/14446695?referrer=searchResults brainly.com/question/11564309?referrer=searchResults brainly.com/question/4025026?referrer=searchResults brainly.com/question/18650135?referrer=searchResultsThe very act of you observing something
will disturb the system is known as:
Answer:
The observer effect is the answer.
In Natural selection, who/what makes the decision about which traits are desirable and get passed to future generations?
In Artificial selection, who/what makes the decision about which traits are desirable and get passed to future generations?
please help me with these two questions complete sentences please thank you! This is for 50 points and BRAINLIEST.
Answer:
Artificial selection, also called "selective breeding” is where humans select for desirable traits in agricultural products or animals, rather than leaving the species.
A wave has wavelength of 10 m and a speed of 340 m/s. What is the frequency of the wave?
Answer:
The frequency of the wave is 34 Hertz
AHHHH HELP IM TIMEd!!!!! WILL BRAINLIEST
Answer:
211.0
Explanation:
∆G(free energy) = ∆H(enthalpy) - T∆S(entropy)
∆H = 215KJ/mol
T = 90°C = 273 + 90
= 363K
∆S = 11J/mol/K or 11 × 10^-3kJ/mol/K
∆G = 215- 363(11 × 10^-3)
= 215 - 3.993
= 211.007
To the nearest tenth 211.0
A compound contains 40%carbon, 6.7%hydrogen, and 56.3%oxygen
calculate the molecular formula of the compound, if it’s vapour density is 90. Note that molecular
mass=2 x vapeur density
Both graphite and pure metals are both soft. explain why
Answer:
In a pure metal, the force needed to make the layers slide over each other is small. This explains why many pure metals are soft. ... The smaller or bigger atoms distort the layers of atoms in the pure metal. This means that a greater force is required for the layers to slide over each other.
Explanation:
In a pure metal, the force needed to make the layers slide over each other is small. This explains why many pure metals are soft. ... The smaller or bigger atoms distort the layers of atoms in the pure metal.
mass is the gravitational pull on the earth
-tru
-fals
plz help
Answer:
I believe the answer is false
Explanation:
Earth's gravity comes from all of its mass. All the mass makes a combined gravitational pull on all the mass in an object. If you were on a planet with less mass than Earth, you would weigh less than you do here. Mass is the quantity of matter in a physical body. It is also a measure of the body's inertia, the resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. Mass is not the gravitational pull on the earth.
what is an atom plz answer to get 10 points +brainliest
Explain what happens during soil depletion and also how we can help prevent this naturally without chemicals?
PLZ FAST TYY <3
Answer: create more healthy products for the soil and animals
Explanation:
Of the elements listed, circle the one that will form the LARGEST ion:
Br, Zn, Ni, Cu, Fe, Mn
A 100 watt solar power panel usually costs $146 they are on sale for 0.75 of the regular price what is the sale price
¿Cómo pueden los padres pasar a sus
hijos rasgos como el color de ojos?
Answer:
Los padres transmiten rasgos o características, como el color de ojos y el tipo de sangre, a sus hijos a través de sus genes. Algunas condiciones de salud y enfermedades también pueden transmitirse genéticamente. A veces, en
why must a ph meter be calibrated by using a solution with a known ph value
Answer:
A pH calibration is the process of adjusting your pH meter by measuring solutions of a known pH value. This is because the characteristics of your electrode will change over time and this needs to be compensated for. A calibration does this by matching your pH meter to the current characteristics of your pH sensor.
Explanation:
A student is asked to describe three random
elements found on the periodic table. All three
elements will FOR SURE have which of the two
following characteristics?
A. similar color and texture
B. shininess and value
C. mass and volume
D. similar boiling and freezing points
All three elements in the periodic table will for sure have characteristic of mass and volume.
What is an element?
An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom which is characteristic of it's own. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
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Evaluate: (12)2 ×102 −6.3 ÷2.1
21.4 A
22 B
9.3 C
75 D HELP PLS
Answer:
answer is 2,445..or B as its noted
Four students wrote down their descriptions of rotting.
Nick: Rotting is a chemical change that happens to fruit like strawberries or apples. Rotting happens slower when there is more heat.
Kevin: Rotting is a chemical change that happens to iron objects like nails. It causes iron objects to change color and texture.
Howie: Rotting is a physical change that happens to food like fruit. Rotting happens faster with increased heat and changes a fruits color and odor.
AJ: Rotting is a chemical change that affects food such as fruit. Rotting changes the fruits color and odor and happens faster with increased heat.
Which student had the best description of rotting?
Nick
Kevin
Howie
AJ
Answer:
Technically only AJ got it correct Howie got it wrong because rotting is a chemical not a physical change AJ was correct becuase he knew what would make the fruit go faster so yes howie would have been right if he got the right kind change.
Explanation:
hope this help
Crumpling and tearing cause physical changes to a piece of paper.
Which two characteristics of the paper change?
A. Size
B. Reactivity
I C. Identity
I D. Shape
Please help I’ll give brainlist and no spamming or links just please help
size and shape. only the appearance of the paper will have changed, but is reversible.
Write the chemical formulas and names for the following ionic compounds. Tin4+ and chlorine
Answer:
SnCl4.
Explanation:
Which element has a greater Ist ionization energy, Phosphorus or Fluorine?
Answer:
phosphorus
Explanation:
Help me with my Science, Part 1 and 2 please this has to be done by tomorrow
Answer:
Part 1: Condensation is when - a
Condensation happens when- water vapour suddenly freezes
Part 2: Water, condenses, vapour, cold, droplets, Condensation
Which is the pathway of light as it travels through the eye?cornea → iris → retina → lenscornea → iris → lens → retinairis → cornea → lens → retinaretina → lens → iris → cornea
Answer:
Cornea >iris>lens >retina
Explanation:
Can't exactly figure out the answer but I think it should look like this
Answer: cornea → iris → lens → retina
Explanation: I have my ways ;>
fe3(so4)3->fe(oh)3->fe2o3->fe->feso4->fecl2
Answer: Id answer it but i think your copy and paste got corrupted!
Explanation:
PLEASE HELP CHEMISTRY
What is the hydronium ion concentration of a solution with a POH of 6.90?
O 6.29 x 10-7 M
6.53 x 10-7 M.
O 7.18 x 10-8 M
O 7.94 x 10-8 M
Answer:
O 7.94 x 10-8 M
Explanation:
Did the test
The hydronium ion concentration of a solution with a pOH of 6.90 is 7.94 × 10⁻⁸ M.
What is the relation between pH & pOH?Relation between the pH and pOH will be represented by the below equation as:
pH + pOH = 14
Given that pOH = 6.90
So, pH = 14 - 6.90 = 7.1
Also we know that, pH = -log[H⁺]
[H⁺] = [tex]10^{-pH}[/tex]
[H⁺] = [tex]10^{-7.1}[/tex]M
[H⁺] = 7.94 × 10⁻⁸ M
Hence the concentration of hydronium ion is [tex]10^{-7.1}[/tex] M.
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Which environment will probably have the lowest relative humidity?
A) A tropical rain forestincorrect answer
B) A desertincorrect answer
C) Farmlandincorrect answer
D) A swampincorrect answer
Really need this quick i will give 20 pnts
B.
Thank Me Later ;))))))
Desert environment will probably have the lowest relative humidity.
What is relative humidity?Relative humidity is a measure of water vapor content in the air. Desert environment will have the lowest relative humidity due to its high temperature and no availability of water bodies such as river, ocean etc so we can conclude that desert environment will probably have the lowest relative humidity.
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What is the frequency of 14000 X ray photons having an energy of 5.27*10-5 J/Hz
The frequency of the X - ray is [tex]7.95 \times 10^{28} \ Hz[/tex].
The given parameters:
Energy of the X-ray, E = 5.27 x 10⁻⁵ JThe frequency of the wave is calculated as follows;
[tex]E = hf\\\\f = \frac{E}{h} \\\\[/tex]
where;
h is Planck's constant = 6.626 x 10⁻³⁴ J/HzSubstitute the given parameters;
[tex]f = \frac{E}{h} \\\\f = \frac{5.27 \times 10^{-5} }{6.626 \times 10^{-34}} \\\\f = 7.95 \times 10^{28} \ Hz[/tex]
Thus, the frequency of the X - ray is [tex]7.95 \times 10^{28} \ Hz[/tex].
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What does it mean to optimize a solution ?
How are solutions optimize
Question
What does it mean to optimize a solution?
To find out best possible solution for a given problem within the given constraint is generally termed as optimization
How are solution optimize ?
To solve an optimization problem, begin by drawing a picture and introducing variables. Find an equation relating the variables. Find a function of one variable to describe the quantity that is to be minimized or maximized. Look for critical points to locate local extrema.
A gas occupies 900 mL at a temperature of 27 °C. What is the volume at
132 °C?
Answer:
4400 ml
Explanation:
How does temperature affect winds all
over the globe?
Answer:
The differences in atmospheric pressure generate winds.
Explanation:
At the Equator, the sun warms the water and land more than it does the rest of the world. Warm equatorial air rises higher into the atmospher and migrates towards the poles. The complex relationships between fronts cause different types of winds and weather patterns.
I hope this helps :)
