Answer:
The energy content of substances is related to the physical state in which the substance exists. Molecules of gases are always in motion as they possess very high kinetic energy, hence, they exist as gases. Liquid molecules are less energetic than gas molecules, hence they have less flow than gases. Solid molecules on the other are fixed at a place because they possess very low kinetic energy and can only vibrate about their fixed positions.
Explanation:
The three states in which matter exist are solid, liquid and gas.
Solids are made of molecules that are closely packed together and held together by strong intermolecular forces. The particles in a solid possess very low kinetic energy and are not free to move about but can only vibrate and rotate about their fixed positions.
Liquids particles are able to move about as they possess enough kinetic energy to limit or reduce the strength of the intermolecular forces binding them together. Thus, liquids can flow.
The particles in a gas are relatively far apart and possess kinetic energy more than the particles of a liquid or solid. The intermolecular forces binding particles of gas together are weak due to the very high kinetic energy of yhe gas particlest
HELLPPPPP! The students were making zinc, Zn by reacting copper, Cu, with zinc nitrate, Zn(NO3)2. They were expecting to produce 5.63 g of copper but they recovered only 5.1 g copper. Calculate the percent yield
Answer:
[tex]5.1 \div 5.63[/tex]
If you could zoom enough to see atoms how would u find out if it is a compound element or a
mixture
Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients.
P4(s)+NaOH(aq)+H2O(l)➪
PH3(g)+Na2HPO3(aq)
Answer:
P₄ + 4NaOH + 2H₂O → 2PH₃ + 2Na₂HPO₃
Explanation:
The given reaction expression is given as:
P₄ + NaOH + H₂O → PH₃ + Na₂HPO₃
To solve this problem, now we put coefficients a, b, c, d and e and we use a mathematical approach to solve this problem;
aP₄ + bNaOH + cH₂O → dPH₃ + eNa₂HPO₃
Conserving P: 4a = d + e
Na: b = 2e
O: b + c = 3e
H: b + 2c = 3d + e
let b = 1, e = [tex]\frac{1}{2}[/tex] , c = [tex]\frac{1}{2}[/tex], d = [tex]\frac{1}{2}[/tex], a = [tex]\frac{1}{4}[/tex]
Multiply through by 4;
b = 4, e = 2, c = 2, d = 2, a = 1
P₄ + 4NaOH + 2H₂O → 2PH₃ + 2Na₂HPO₃
a 182.4g sample of germanium-66 is left undisturbed for 22.5 hours. At the end of that period, only 5.70g remain. What is the half-life of this material?
Answer:
Approximately [tex]4.5\; \text{hours}[/tex].
Explanation:
Calculate the ratio between the mass of this sample after [tex]22.5\; \text{hours}[/tex] and the initial mass:
[tex]\displaystyle \frac{5.70\; \rm g}{182.4\; \rm g} \approx 0.03125[/tex].
Let [tex]n[/tex] denote the number of half-lives in that [tex]22.5\; \text{hours}[/tex] (where [tex]n\![/tex] might not necessarily be an integer.) The mass of the sample is supposed to become [tex](1/2)[/tex] the previous quantity after each half-life. Therefore, if the initial mass of the sample is [tex]1\; \rm g[/tex] (for example,) the mass of the sample after [tex]\! n[/tex] half-lives would be [tex]{(1/2)}^{n}\; \rm g[/tex]. Regardless of the initial mass, the ratio between the mass of the sample after [tex]n\!\![/tex] half-lives and the initial mass should be [tex]{(1/2)}^{n}[/tex].
For this question:
[tex]{(1/2)}^{n}} = 0.03125[/tex].
Take the natural logarithm of both sides of this equation to solve for [tex]n[/tex]:
[tex]\ln \left[{(1/2)}^{n}}\right] = \ln (0.03125)[/tex].
[tex]n\, [\ln(1/2)] = \ln (0.03125)[/tex].
[tex]\displaystyle n = \frac{\ln(0.03125)}{\ln(1/2)} \approx 5[/tex].
In other words, there are [tex]5[/tex] half-lives of this sample in [tex]22.5\; \text{hours}[/tex]. If the length of each half-life is constant, that length should be [tex](1/5) \times 22.5\; \text{hours} = 4.5\; \text{hours}[/tex].
please answer Seed plants are divided into two groups. What are they? GIVING BRIANLIEST TO WHOEVER IS RIGHT.
vascular and nonvascular
brown seeds and green seeds
nonflowering and flowering
fruits and vegetables
Answer: nonflowering and flowering
Explanation: i just did the quiz
Seed plants are divided into two groups, are nonflowering and flowering plants. Therefore, option C is correct.
What is flowering plant ?Flowering plants create blooms, which they then use as seeds to develop more of their kind or other plants. Nonflowering plants don't produce flowers; instead, they produce microscopic reproductive components called seeds or spores that can be used to create additional plants that look exactly like them.
Gymnosperms and angiosperms are frequently used as arbitrary divisions for the seed plants. The difference between the two is based on the fact that angiosperms produce blooms, whereas gymnosperms do not.
An ovary surrounds the angiosperm seed. A seed grows on the size of a cone in gymnosperms. Inside an ovary, only an angiosperm seed can grow.
Thus, option C is correct.
To learn more about flowering plant, follow the link;
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How can we determine the number of significant figures in measurements?
Answer:
Rule 1: All nonzero digits in measurement are significant.
Rule 2: Zeros that appear between other nonzero digits (i.e., "middle zeros") are always significant.
Rule 3: Zeros that appear in front of all of the nonzero digits are called leading zeros. Leading zeros are never significant.
Rule 4: Zeros that appear after all nonzero digits are called trailing zeros. A number with trailing zeros that lacks a decimal point may or may not be significant.
Rule 5: Trailing zeros in a number with a decimal point are significant. This is true whether the zeros occur before or after the decimal point.
Which reason best explains why plasmas are good conductors of electricity? They have mobile charged particles. They are at extremely high temperatures. They are made up of particles in fixed positions. They have slow-moving nuclei that carry electricity.
Answer:
They have mobile charged particles.
Explanation:
Plasma refers to very hot matter such that the electrons in matter are ripped away from the atoms leading to the formation of an ionized gas.
We know that the carriers of electricity are charged particles. Any state of matter that has an abundance of charge carriers will definitely be a good conductor of electricity.
Therefore, plasmas are good conductors of electricity because they have a lot of mobile charged particles.
What type of reaction is Ni + MgSo4
please help due soon!
Answer:
W X Z Y. It is the strongest to the least
Which of the following is a compound?
Group of answer choices
Nitrogen
Oxygen
Hydrogen
Carbon Dioxide
Answer:
carbon dioxide
it is made up of carbon and oxygen.
1. By means of orbital diagrams, write down the
electronic configurations of these elements.
(a) Sodium
(e) Magnesium
(b) Aluminium (f) Silicon
(c) Phosphorus (g) Sulphur
(d) Chlorine
(h) Argon
Answer:
a) 1s22s22p63s1
b) 3s² 3p¹
c) 1s22s22p63s23p3
d) 3s² 3p⁵
e) 3s2
f) 1s22s22p63s23p2
g) 1s22s22p63s23p4
h) 3s² 3p⁶
a measuring cylinder cannot be used to measure the volume of regular shaped solids true or fakse
Answer:
False
Explanation:
The statement is false because the volume of an irregular object can either be measured by the use of a measuring cylinder or an overflowing jar. That's the standard method of measuring irregular objects volume.
What is the difference between reactants and products?
Answer:
The reactants are the substances that start the chemical reaction. The products are the substances that are produced in the chemical reaction.
Explanation:
What is the difference between reactants and products?
Answer:Reactants It is a substance that is present at the start of a chemical reaction.The substance(s) to the left of the arrow in a chemical equation. Products It is a substance that is present at the end of a chemical reaction.The substance(s) to the right of the arrow. #CARRYONLEARNING #STUDYWELLWhat is the chemical formula for carbon fibre? (specifically if possible)
Answer: 90% Polyacrylonitrile (PAN)
(C3H3N)n - n signifies the chain
10% Rayon & Pitch Base
Explanation:
Just Because...
How many atoms are in 2.00 x 10^-7 moles of Helium
Answer:
1.20 10^17
Explanation:
convert to atoms using Avogadro's number
2.00 x 10^-7 moles * 6.022 X 10^23 atoms= 1.20 10^17
3 points
44. Name one similarity and one difference between compounds and
homogeneous mixtures.
Your answer
Hey there!
Elements and compounds are purely homogeneous substances and they have a constant composition throughout. Elements and compounds cannot be separated into their respective constituents by physical means. Compounds and mixtures are made up of different elements or different atoms.
I need help with this
Answer: B
Explanation: All you have to do to find out if an equation is balanced is count the number of atoms on each side. To be balanced, they must be equal.
In case you didn’t know: The number in front of an element or compound means that you will multiply. For instance, 2AlBr3 would have 2 Al atoms and 6 Br atoms. The subscript number just means how many atoms there are in that compound.
There is no _____ movement in a strike-slip fault, meaning there are no mountain ranges.
Answer:
isostatic adjustment movement
I need to turn this in a 3:00 sharp
Answer:
i think their is amswer key for that
Explanation:
Question 13 (5 points)
(01.06 MC)
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?
Options:
It can be separated into carbon and oxygen using physical methods.
Carbon and oxygen retain their original identity in it.
Carbon and oxygen are chemically bonded in it.
Explanation:
Sorry the guy asking forgot to put in the options so comment below the correct answer and brainy STOP DISABLING COMMENTS YOUR CAUSING SO MANY INCORRECT THINGS
Four grams of magnesium react with an excess of dilute hydrochloric acid. Calculate the volume in liters of hydrogen gas collected over water at 300 K, if the vapor pressure of water at that temperature is 26.7 mm and the barometric pressure is 730 mm
Which of these elements is the odd one out? Li Na Mg K Rb Cs
Answer: cc
Explanation:..
What is the mass of 5.26 mol Fe2(SO4)3?
Answer in units of g.
2100 g Fe₂(SO₄)₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Using Dimensional AnalysisAtomic Structure
Reading a Periodic TableExplanation:Step 1: Define
5.26 mol Fe₂(SO₄)₃
Step 2: Identify Conversions
Molar Mass of Fe - 55.85 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Fe₂(SO₄)₃ - 2(55.85) + 3(32.07) + 12(16.00) = 399.91 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 5.26 \ mol \ Fe_2(SO_4)_3(\frac{399.91 \ g \ Fe_2(SO_4)_3}{1 \ mol \ Fe_2(SO_4)_3})[/tex]Multiply/Divide: [tex]\displaystyle 2103.53 \ g \ Fe_2(SO_4)_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2103.53 g Fe₂(SO₄)₃ ≈ 2100 g Fe₂(SO₄)₃
HELP ASAP WILL MARK BRAINLIEST!!!
Answer:
22.4/3.8=5.89
Explanation:
How could you increase the atomic number?
Answer:
So the atomic number increases with each element. The atomic mass is the sum of the protons and neutrons. As the atomic number increases it causes an increase in the atomic mass. However sometimes there is not a corresponding increase in the number of neutrons...
Explanation:
:)) good luck!!!
How many atoms of oxygen are in a molecule of glucose (C6H12O6)?
Record your answer. Be sure to use the correct place value.
Answer:
There are 6 oxygen atoms.
Explanation:
Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.
hope this helps
The molecular formula of glucose is C₆H₁₂O₆, therefore one molecule of glucose has six oxygen atoms.
What is the chemical formula?A chemical formula is a way of representing information about the chemical proportions of atoms of each element that are present in a molecule or chemical compound. The chemical formula can be written by using chemical symbols, numbers, and other symbols, such as commas, dashes, brackets, and plus (+) and minus (−) signs.
A chemical formula of a compound contains no words but can represent certain simple chemical structures. Chemical formulae are usually more limited in power than structural formulae and chemical names. There are two types of chemical formulas one empirical formula and another molecular formula.
In a molecular formula, more than one atom of the same element can be represented by subscripts. The given formula of glucose is C₆H₁₂O₆ and the total number of oxygen atoms in the formula is equal to six.
Learn more about chemical formula, here:
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Which atom has the largest atomic radius? *
K
Fr
Cs
Rb
PLSS ANSWERRRR
Earthquakes are relatively common throughout the west coast, especially in California. The map of California seen here gives you an idea why. Explain what is happening along with the red arrows on the map.
A.) The Pacific Plate and the North American plate are diverging.
B.) The sea floor is spreading where the Pacific and North American plates meet. (Converge)
C.) There is a transform boundary, commonly causing strike-slip faults, between the Pacific and the North American plates.
D.) There is a convergent plate boundary between the oceanic and continental plates.
Answer:
b
Explanation:
Come up with another way to separate certain mixture?
Answer:
Oil
Explanation:
Need help ASAP. Gave only 10 min
Answer:
Explanation:
If it interests you, you could check out Maxwell's demon. If he is not in operation (and he likely isn't), then the answer is D.
Heat always transfers from hot to cold -- at least at beginning levels of chemistry.
