How does the idea of a neutron help address the puzzles about the protons in the nucleus and the mass of atoms?
Answer:
a
Explanation:
5.Are pure solids included in equilibrium expressions? Explain your answer.
Answer:
Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The concentration of a pure liquid or solid equals its density divided by its molar mass.
Explanation:
Hope this helps!!!
4.13 moles of chromium (III) nitride weighs how much?
Answer: 272.5915639999...
Explanation:
HELP 20 POINTS
Predict the products of each reaction
Na + HCl→
PbCl2(s) + Li2SO4(aq) →
Zn(s) + AgNO3(aq) →
Answer:
2Na + 2HCl → 2NaCl + H2
PbCl2 + Li2SO4 = LiCl + PbSO4
Zn(S) + AgNO3(Aq) = ZnNO3(Aq) + Ag(S)
Match the term with its description. (4 points)
1.
Heterogeneous
2.
Colloid
3.
Homogeneous
4.
Emulsion
a.
A mixture in which microscopically insoluble particles are suspended throughout another substance
b.
A mixture in which two or more liquids are mixed that normally are not mixable
c.
Mixture that has its different components mixed unevenly within the substance
d.
Mixture that has its different components mixed evenly within the substance
Answer:
2B, 1A, 3D, 4C, because of the definitions, they match.
What do the two arrows in the diagram most likely represent?
O radiation
O photosynthesis
cellular respiration
Oenergy transfers
Our digestive enzymes are able to break the alpha linkage in potatoes but not the ?? Linkage in paper
Answer:Beta
Explanation:
I watched the video and I got it wrong, the right answer was beta. I can’t explain why because I’ve already forgotten lol
Digestive tract have digestive enzymes which are not able to break beta linkages as humans do not have enzymes which breakdown beta linkages.
What is digestive tract?
It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.
The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices from gastric glands in response to sight and smell of food.It involves chewing and chemical breakdown of food by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase and amylase which are secreted by the salivary and serous glands present on the tongue.
Learn more about digestive tract,here:
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True or False Hydrogen is amable used to in limpa
Answer:
False
Explanation:
Answer:
false
Explanation:
false
Which landform explains the lack of cultural interaction between ancient China and ancient India? (4 points)
the Loess Plateau
the Chang River valley
the Gobi Desert
the Himalaya Mountains
Answer:
I had this question and it was the 4th one for me
Explanation:
What is the mass of 5.119 102 molecules of copper sulfate
(CuSO4)?
Answer:
Mass = 135.66 ×10⁻²¹ g
Explanation:
Given data:
Number of molecules of CuSO₄= 5.119×10²
Mass of CuSO₄= ?
Solution:
The given problem will solve by using Avogadro number.
1 mole contain 6.022×10²³ molecules
5.119×10² molecules ×1 mol / 6.022×10²³ molecules
0.85×10⁻²¹ mol
Mass in grams:
Mass = number of moles × molar mass
Mass = 0.85×10⁻²¹ mol × 159.6 g/mol
Mass = 135.66 ×10⁻²¹ g
find the mass in 3.8 moles of magnesium chloride
Explanation:
34.31+35.45(2)=
27.31+70.90=
95.21g/mol
name the process of separating into immiseible liquid?
Answer:
Decantation
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
I need help, and fast, please.
Acid contains. a) h^+. b)oh^-
Answer:
hydrogen ions which is H+
Answer: An acid is a solution with more H+ ions than OH- ions. An acid is any compound that yields hydrogen ions (H+) or hydronium ions (H3O+) when dissolved in water.
Explanation:
Which of the following correctly shows the word equation for the reaction of aluminum and copper oxide yielding aluminum oxide and copper?
A. aluminum + aluminum oxide → copper + copper oxide
B. aluminum + copper oxide → aluminum oxide + copper
C. aluminum oxide + copper → aluminum oxide + copper
D. copper + aluminum → copper oxide + aluminum oxide
Answer:
The correct answer is B
Explanation:
Educere
aluminium + copper oxide → aluminium oxide + copper. Hence, option B is correct.
What is a word equation?A word equation represents a chemical reaction using the names of the substances involved.
aluminium + copper oxide → aluminium oxide + copper correctly shows the word equation for the reaction of aluminium and copper oxide yielding aluminum oxide and copper.
Hence, option B is correct.
Learn more about word equations here:
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formic acid is a stronger acid than Acetic Acid, why ?
Answer:
In acetic acid, due to the +I effect of the alkyl group the electron density on the oxygen atom increases.
The release of H + ion becomes difficult. Thus , greater the magnitude of +I effect weaker will be the acid.
Order of +I effect : CH 3>H
Therefore , formic acid (HCOOH) is more acidic than acetic acid (CH 3COOH).
If you help me quickly i will give you 100 point
Answer:
Ovary
Explanation:
The ovaries are organs that lie to the upper right and left of the uterus. They produce, store, and release eggs into the fallopian tubes in the process called ovulation
14.
How many grams of copper are in 4.6 moles of copper?
Answer:
292.1 kg = 292 100 g
Explanation:
n = m/Mm
Mm(Cu) = 63.5
m = n * Mm
m = 4.6 * 63.5
m = 292.1 kg
A cube of zinc at 15.C is placed in contact with a cube of tin at 45. Which statement describes the initial flow of heat between the cubes? *
Multiple lines between two atoms in a covalent lewis dot diagram mean:
A That there are more atoms involved
B That multiple electrons are shared between the atoms
C That the atoms are not bonded
D That the bond is easier to break
Explain how the rock cycle works.
Be sure to include the name of each type of rock in your description.
(Igneous rock, metamorphic rock, and sedimentary rocks)
Question 4
Calculate the nlass of 7.1 x 1024 formula units of magnesium hydroxide, Mg(OH),.
its me again this is how you find the answer. note: i dont have the periodic table to see the exact atomic mass to find the molar mass however this is the answer:
so the actual formula is Mg(OH) with a 2 as a subscript because there are 2 Mg. so with Mg(OH)2 the Molar mass is 58.32g/mol. 58.32 g/mol x 7.1x1024 = 4.1x1026g
a student observed the shape of the moon once every 7 days during the month of June. which of the following sets of drawings shows how the moons shape could have changed during the month of June?
las diferencias fundamentales del entramado urbano antes y despues de 1750
Answer:?
?Explanation:
Please Help Meeee.
Best answer will get brainliest.
Answer:Yes I am very good at acid
Explanation:
Answer: I say B
Explanation:
My question is on the image
Answer:
Top left: RR Top right: Rr Bottom left: Rr Bottom right: rr
Explanation:
if both parents are heterozygous then the table will always look like this. the chances of the offspring being heterozygous are 50%. the offspring has a 25% chance of having two recessive traits and a 25% chance of having two dominant traits.
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
How many moles of chloride ion (Cl-) are present in a 395 mL of a 1.79 M solution of beryllium chloride (BeCl2)?
(THOROUGH EXPLANATION PLEASEEEE)
Answer: 1.414 mol Cl-
Explanation:
First, let's find the moles of BeCl2.
1.79 M = 1.79 mol/L
395 mL = 0.395 L , since 1L = 1000 mL
Using stoichiometry,
1.79 mol/L *0.395 L = about 0.707 mol BeCl2
Now, we have 0.707 mol of BeCl2, but we are trying to find moles of Cl-
There are two chloride ions in each molecule of BeCl2, so there will be twice as many moles as well.
0.707 mol BeCl * (2 mol Cl- / 1 mol BeCl) = 1.414 mol Cl-
Hope this helps!
how many moles of aluminum are needed to produce 2.8 moles of aluminum chloride
Answer:
1.4 mol
Explanation:
that my i got i was doing for it
This chart shows descriptions of the atoms for four different substances.
Which substance is a solid?
Object 1
Object 2
Object 3
Object 4