Answer: the erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium. Brownian motion, or pedesis, is the random motion of particles suspended in a medium. This pattern of motion typically consists of random fluctuations in a particle's position inside a fluid sub-domain, followed by a relocation to another sub-domain. Brownian motion, also called Brownian movement, any of various physical phenomena in which some quantity is constantly undergoing small, random fluctuations. It was named for the Scottish botanist Robert Brown, the first to study such fluctuations (1827).
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Explanation:
Answer:
to and fro motion is called brownian motion
How many known elements have atoms, in their ground-state, with valence electrons whose quantum numbers are n = 5 and l = 1?a. 36..
b. 37.
c. 6.
d. 8.
Answer:
c. 6.
Explanation:
Looking at the description given in the question, the elements involved must belong to the p- block of the periodic table and must be in period 5. They also must possess valence electrons in the 5p- orbital.
Now if we look at the p- block of period 5, the following elements satisfy these requirements; Sr, In, Sn, Sb, Te and I.
Hence there are six of such elements.
The chemical elements that have atoms, in their ground-state, with valence electrons whose quantum numbers are n = 5 and l = 1 are: C. 6.
What is a valence electron?A valence electron can be defined as the number of electrons that is present in the outermost shell of an atom.
In Chemistry, valence electrons are primarily used to determine whether an atom or group of chemical elements that are found on the periodic table can bond with others.
Based on electronic configuration, quantum numbers of n = 5 and l = 1 simply represents a 6p orbital and there a total of six (6) chemical elements with this orbital, and these include;
ThalliumLeadRadonAstatinePoloniumBismuthRead more on valence electrons here: https://brainly.com/question/16554158
Examples of nuclear fusion and fission.
Answer: For example, uranium can fission to yield strontium and krypton. Fusion joins atomic nuclei together. The element formed has more neutrons or more protons than that of the starting material. For example, hydrogen and hydrogen can fuse to form helium.
Explanation:
Hope this helped!
Answer:
Explanation:For example, uranium can fission to yield strontium and krypton. Fusion joins atomic nuclei together. The element formed has more neutrons or more protons than that of the starting material. For example, hydrogen and hydrogen can fuse to form helium.
what are the 7 methods of separating mixtures?
Methods Of Separating Mixtures
Handpicking.
Threshing.
Winnowing.
Sieving.
Evaporation.
Distillation.
Filtration or Sedimentation.
Separating Funnel.
Answer:
wanna friend
Explanation:
pls
why specific gravity test is done ?
Answer: Urinary specific gravity (SG) is a measure of the concentration of solutes in the urine. It measures the ratio of urine density compared with water density and provides information on the kidney's ability to concentrate urine. A urinary specific gravity measurement is a routine part of urinalysis. A urine specific gravity test compares the density of urine to the density of water. This quick test can help determine how well your kidneys are diluting your urine. Urine that's too concentrated could mean that your kidneys aren't functioning properly or that you aren't drinking enough water.
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Explanation:
Which molecule/molecular compound is joined by a single covalent bond? O2 or N2 or Br2 or CO2?
500 grams of an unknown substance gains 23000 J of heat as it is heated from a temperature of 250C to 1250C. Using mathematical computation and the chart below, determine the identity of the unknown substance.
Answer:
The given substance is cast iron.
Explanation:
Given data:
Mass of substance = 50 g
Heat absorbed = 23000 J
Initial temperature = 250°C
Final temperature = 1250°C
Which metal is this = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 1250°C - 250°C
ΔT = 1000°C
23000 j = 50 g ×c ×1000 °C
23000 J = 50,000 g. °C×c
c = 23000 J /50,000 g. °C
c = 0.46 J/g.°C
The given substance is cast iron.
Which balance equation represents a single replacement reaction
Answer: A single replacement reaction looks sort of like this
A + BC —> AC + B
Explanation: It would be a LOT more helpful for us if you had provided the answer choices for this question, but I'll try to help by explaining WHAT single-replacement reactions are.
Single-replacement reactions are reactions in which one ion displaces another to form a new compound . One reactant is an element; one reactant is a compound . One product is an element; one product is a compound . The reactant element is part of the compound product .
I hope this helped!
The cost of table of sugar C12 H22 O11 is RS 24 per kg calculate it cost mole
Answer:
One mole of sugar is a considered as atomic mass. The atomic mass of sugar is 342 g. Rate of 1 kg of sugar is 40 Rs. Thus, the rate of 342 gram of sugar= 40x342/1000 = 13.68 Rupees
Explanation:
What is the molar mass of h2
Answer:
The answer is one
Explanation:
I will just type any rubbish here bcuz my answer should be more than 20 words..... Just know the answer is 1
How are ionic compounds named?
Answer:
Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.
Explanation:
Hope this helps.
What do you think is the common link between each of the phenomena shown?
Answer:
sounds wave
Explanation:
From alarm, microwave, laser, TV, water waves and a musical instrument, everything release sounds.
(Not the same)
If it convinced you please add this in the brainlist
A chemist combine did 3.50g of potassium level with chlorine gas to yield 6.6 7g of potassium for it. Assuming all the potassium was consumed, and that potassium chloride was the only product that formed, what mass of chlorine reacted?
Answer: mass of chlorine reacted is 3.18 g
Explanation:
2 K + Cl2 = 2KCl
no. of moles of K = mass / molar mass
= 3.50 / 39
= 0.0897
no. of moles of KCl = mass / molar mass
= 6.67 / 74.5
= 0.0895
no. of moles of Cl2 required = number of moles of KCl / 2
= 0.0895 / 2
= 0.0448 moles
mass of Cl2 required = no. of moles of Cl2 required x molar mass
= 0.0448 x 71
= 3.1808 g ≈ 3.18 g
Therefore mass of chlorine reacted is 3.18 g
FeO+ PdF2 ---> FeF2+PdO balance please worth 50 points
Answer: FeO
Explanation:
Answer:
This is not worth 50 points liar
Explanation:
500.0 liters of a gas are prepared at 700 mm Hg and 200 C. The gas is placed into a tank under high pressure. What is the volume of the gas?
Answer: 143*tank temperature/tank pressure L
Explanation: too few data. Need to know the pressure and what if any, temperature change.
tank volume = (tank temp/tank pressure)*(500*200/700) = 143*tank temp/tank pressure L
At constant temperature, (500*700)/tank temp
e.g. at 1400mm Hg, 500*700/1400 = 250L
List three things, other than the name, symbol, atomic number, and average atomic mass, you can discover about an element using the periodic table in Figure 6.9.
Answer: State of matter, Subcategory in the metal-metalloid-nonmetal trend, and electrons per shell.
Explanation:
Why is cellular respiration important?
A or B?
A. It changes energy in glucose into energy that can be used.
B. It changes radiant energy into chemical energy for all living things.
using the ideal gas law, PV=nRT, where R=0.0821 L atm/mol K, calculate the volume in liters of oxygen produced by the catalytic decomposition of 25.5 g potassium chlorate according to the following reaction. The oxygen is collected at 2.22 atm and 25.44 C. express your answer to the correct number of significant figures.
2KClO3(s) ---> 2KCl(s) + 3O2(g)
Answer:
V = 2.32 Liters
Explanation:
PV = nRT => V = nRT/P
n = 25.8g/122g/mole = 0.21 mole
R = 0.08206 L·atm/mol·K
T = 25.44°C + 273 = 298.44K
P = 2.22 atm (given in problem)
V = (0.21mol)(0.08206 L·atm/mol·K)(298.44K)/(2.22atm) = 2.32 Liters at 25.44°C & 2.22atm
if you have 4 moles of n2 and 6 moles of h2, how much would be produced?
Answer:
8 i think
Explanation:
The phase change between white tin and gray tin is difficult to observe directly. Both substances can be burned, however. From these equations, calculate AHⓇ for the conversion of gray tin into white tin:
Sn(s, white) + O2(g) + SnO2(g) AH = -580.69 kJ
Sn(s, gray) + O2(g) + SnO2(g) AH° = -582.78 kJ
AH = _________ kJ
Answer: Thus [tex]\Delta H[/tex] for the conversion of gray tin to white tin is -20.9 kJ
Explanation:
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The final reaction is
[tex]Sn(s, gray)\rightarrow Sn(s, white)[/tex] [tex]\Delta H=?[/tex]
The intermediate balanced chemical reaction will be,
[tex]Sn(s, gray)+O_2(g)\rightarrow SnO_2(g)[/tex] [tex]\Delta H^0=-582.78kJ[/tex] (1)
[tex]Sn(s, white)+O_2(g)\rightarrow SnO_2(g)[/tex] [tex]\Delta H^0=-580.69kJ[/tex] (2)
substarcting (2) form (1) we get
[tex]\Delta H=\Delta H_1-\Delta H_2[/tex]
[tex]\Delta H=-582.78-(-580.69kJ)[/tex]
[tex]\Delta H=-20.9kJ[/tex]
The free flow of electrons is responsible for
Answer:
An electrical phenomenon is caused by flow of free electrons from one atom to another. The characteristics of current electricity are opposite to those of static electricity. Wires are made up of conductors such as copper or aluminum.
Explanation:
from google
Read the statement about Mount Vesuvius. Mount Vesuvius erupted in 79 CE and destroyed the ancient city of Pompeii. Why is the statement free of bias? It is based on opinion. It is a fair statement of fact. It expresses one specific view. It exaggerates details of the event. Explain good or ill report
Answer:
It is a fair statement of fact
Explanation:
The statement is a fact that is unopinionated and it does not exaggerate details of the event it just states the fact without opinions or exagerrations. This is why its unbiased.
The statement that is given is free of bias because It is a fair statement of fact. The correct option is B.
What is a statement?A statement is affirmative that is proposed and based on facts or the condition of the situation. It is a declaration. Statements don't pose queries, issue requests, or issue directives. They are not exclamations, either.
Scientific statements are generally based on facts and true results that came from an experiment. Like the one here, about Mount Vesuvius.
The statement simply tells the truth without opinions or exaggerations; it is a fact that is opinionated but does not embellish the specifics of the occurrence. This is why it is objective.
Thus, the correct option is B. It is a fair statement of fact.
To learn more about the statement, refer to the below link:
https://brainly.com/question/24071808
#SPJ2
A 2.52 L container of oxygen gas at 28.6 °C is heated to 45.9 °C. Assuming that the volume of the container can vary, what is the new volume of the gas?
Answer:
4.04433566 L (433566 repeating)
Explanation:
2.52 is divided by 28.6 is 0.0881118 (881118 repeating). multiply 0.0881118 (881118 repeating) by 45.9 to get 4.04433566 L (433566 repeating).
what is an atomic element of carbon
Answer: do u mean atomic number? The atomic number for carbon is 6
Explanation:
Answer:
Chemical element
Explanation:
Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.
Mg + P4 → Mg3P2
Assuming an unlimited amount of phosphorous (P4), how many grams of Mg are needed in order to
produce 1200.00 grams of Mg3P2?
Answer:
648.7g of Mg must be added
Explanation:
Based on the reaction:
3Mg + 1/2P4 → Mg3P2
3 moles of Mg produce 1 mole of Mg3P2
To solve this problem we neeed to find the moles of Mg3P2 in 1200g. With these moles and the chemical reaction we can finf moles of Mg and its mass:
Moles Mg3P2 -Molar mass: 134.88g/mol-:
1200.0g Mg3P2 * (1mol / 134.88g) = 8.897 moles of Mg3P2
Moles Mg:
8.897 moles of Mg3P2 * (3mol Mg / 1mol Mg3P2) = 26.69 moles of Mg
Mass Mg -Molar mass: 24.305g/mol-:
26.69 moles of Mg * (24.305g / 1mol) =
648.7g of Mg must be added7. A. How many moles of Calcium hydroxide (CaOH2) are needed to completely react with 14.5 mol of Phosphoric acid (H3PO4)?
2 H3PO4 + 3 Ca(OH)2 → 6 H(OH) + Ca3(PO4)2
a. How many moles of water (HOH) will be produced?
b. How many moles of Calcium Phosphate (CaOH2) will be produced?
Answer:
moles of calcium hydroxide= 21.75 mol
a) 43.5 mol
b) 7.25 mol
Explanation:
Please see the attached picture for the full solution.
21.4 L of gas at 42.3 °C and 681 mm Hg are heated to 221 °C, and the pressure is changed to 248 mm Hg. What is the new volume?
Answer:
V₂ = 90.42 L
Explanation:
Given data:
Initial volume = 21.4 L
Initial pressure = 681 mmHg (681/760=0.89 atm)
Initial temperature = 42.3 °C (42.3 +273 = 315.3 K)
Final temperature = 221°C (221+273 = 494 K)
Final volume = ?
Final pressure = 248 mmHg(248/760 =0.33 atm)
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₁V₁/T₁ = P₂V₂/T₂
V₂ = P₁V₁T₂/T₁P₂
V₂ = 0.89 atm × 21.4 L × 494 K / 315.3 K × 0.33 atm
V₂ = 9408.72 L /104.05
V₂ = 90.42 L
What is a net ionic equation?
A. An equation that shows all substances as compounds
B. An equation that shows all dissolved compounds as ions
C. An equation showing only what is involved in the reaction
D. An equation that is balanced on both sides
Answer:
the answer is C
Explanation:
i took a test and it said c was the answer
The correct option is C.
In the complete equation of a chemical reaction, the complete symbols of reactants and products are written along with states of matter under conditions at which the reaction is taking place.
In the net ionic equation of a chemical reaction, only those chemical species are written which directly participate in the chemical reaction. The mass and charge in the net ion equation must be balanced.So, the correct option is c.
To know more about:-
https://brainly.com/question/7018960
How many grams of F2 are in 3.45 x 1022 molecules of F2?
Answer:
Mass = 2.16 g
Explanation:
Given data:
Number of molecules of F₂ = 3.45 × 10²²
Mass in gram = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
3.45 × 10²² molecules ×1 mol / 6.022 × 10²³ molecules
0.57× 10⁻¹ mol
0.057 mol
Mass in gram :
Mass = number of moles × molar mass
Mass = 0.057 mol × 37.9 g/mol
Mass = 2.16 g
If a person tells you she is 6 feet tall, is she basing that measurement on customary units or metric units?
customary
metric
Answer:
Customary
Explanation:
Answer:
Customary
Explanation:
In the reaction __S+3O2→2SO3, what coefficient should be placed in front of the S to balance the reaction?
Question 1 options:
1
2
3
Answer:
2
Explanation:
because on the product side you have 2 sulfurs so you need 2 on the reactant side.