Answer:
7.10 moles of iron
Explanation:
Given data:
Number of moles of iron = ?
Number of atoms of iron = 4.82×10²⁴
Solution:
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 atoms
4.82×10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms
0.710×10¹
7.10 moles of iron
Atoms of a given element will have the same mass. A. True B. False
Answer:
True
Explanation:
When using the scientific notation system to express large numbers, move the _____________ until _____ digit(s) remain(s) to the left, then indicate the number of moves of the decimal point as the ______________
help me guyzz
Answer:
When using the scientific notation system to express large numbers, move the decimal point until one digit(s) remain(s) to the left, then indicate the number of moves of the decimal point as the power of ten.
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
Radius of sun:
696000 Km
In scientific notation
6.96000 × 10⁵ Km
The expanded notation is standard notation of writing the numerical values which is normal way. The numbers are written as they are, without the power of 10.
The diagrams below represent the four states of matter. A number of blue balls are loosely packed in a container. A number of yellow balls are randomly distributed in a container. Diagram 1 Diagram 2 A number of red balls are tightly and neatly packed in a container. A number of balls are positioned randomly in a container. Some are pink and labeled with a plus sign and some are blue and labeled with a minus sign. Diagram 3 Diagram 4 Which diagram represents a gas that has been ionized? diagram 1 diagram 2 diagram 3 diagram 4
Answer:
diagram 1 blue balls
Explanation:
EDGE 2020
Answer: The answer is a
Explanation:
what causes a change in a state of matter? Help please
Answer:
Going through a phase. Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). Physical changes can also be caused by motion and pressure.
Explanation:
Hope this helps :)
concentrations
1) calculate the mass of sucrose and the mass of water (in grams) that must be used to prepare 400 g of 50% by mass of sucrose solution. since a solvent is present in greater proportion than the solute in a solution, do these terms still apply at 50% by mass concentration? why?
2) if a wine sample is 12.0% by volume ethanol, how many milliliters of ethanol is present in a bottle containing 500.0 mL of the wine? if other alcoholic drinks have relatively high concentration 35 to 50% (v/v) ethanol, is wine safer to drink before driving? why?
3) a pancake recipe recommends a 65% (v/v) sugar syrup concentration. if you wish to prepare the recipe and you only have 50 g of sugar at home, how will you prepare the syrup? if based on the recipe, one pancake will need 5 mL of the syrup, how many pancakes should you make to use all the syrup you made?
pls help >.
Answer:
The glucose concentration is measured in mM, the abbreviation for "milliMolar". The molar (M) concentration of a solution is a measure of how much solute (the component of a solution present in lesser amount, often a solid) there is in a given volume of solution. After swirling the flask to dissolve the solid, water is added carefully until the bottom of the meniscus coincides with the calibration mark on the neck of the flash.
what is the frequency of light released when electron moves from the second energy level to the first energy level in hydrogen?
Answer:5 -2.176 eV
Explanation:
If an electron is in the first energy level, it must have exactly -13.6 eV of energy. If it is in the second energy level, it must have -3.4 eV of energy. An electron in a hydrogen atom cannot have -9 eV, -8 eV or any other value in between.
Two different recording stations have found that they had the same value for ΔT after an earthquake. If this is all the information they have so far, what can they conclude?
Answer:
The epicenter is the same distance from both recording stations
Explanation:
ΔT is the time between anomaly occurrence and the origin time of the earthquake.
Now, we are told both stations had the same value for ΔT.
This means that their points on the earth's surface which vertically above the focus of the earthquake is the same and thus we can conclude that the epicenter is the same distance from both stations.
Which of the following must be transformed into electrical energy when biomass is used as an energy resource?
chemical energy
mechanical energy
nuclear energy
radiant energy
Answer:
Nuclear Energy is the answer
A student writes down several steps of the scientific method. Put the steps in the best order.
Answer:
doe sit have a picture-
Explanation:
Calculate the density of 30 cubic centimeters of liquid that has a mass of 120 grams.
Answer:
4 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{120}{30} = \frac{12}{3} \\ [/tex]
We have the final answer as
4 g/cm³Hope this helps you
The volume of a container of gas is 2.65 L and is at a temperature of 22.4°C. What is the new volume if
the temperature is increased to 99.6 °C?
A) 11.8L
B) 3.34 L
C) 0.596 L
D) 10.6L
Answer:
B) 3.34
Explanation:
V1/T1 = V2/T2
So V2= (T2xV1)/T1
Side note Temp for using gas law is always kelvin (Celsius +273.15)
Volume is always in Liters
So V2 = (372.6Kx2.65L)/295.55L
Which results in 3.34L
circle the odd one out and give reason of your choices
copper
iron
pencil
rubber
How was the Periodic Table of Elements developed and how are the elements arranged on it?
Answer:
Following are the solution to this question:
Explanation:
Mendeleev has been the chemist that designed a periodic table for component identification based on the increasing number of elements. Thus, the is traditionally called a table parent and this periodic table had some drawbacks.
Consequently, Mosley rebuilt Mendeleev's periodic table to once again overcome this disadvantage. Which atoms were arranged as per the increasing order of atomic number instead of mass number. The traditional table, therefore, comprises seven horizontal lines regarded as cycles. But 18 control limits were named group lines.
The whole Periodical Tables is classified as a,p,d, and f block
S block, groups have 1 and 2.
P block, group has 13-18
D block, group has 3 to 12
F block, – Two lines far below the periodic table.
what happened to the boiling point of water after mixing it with table salt??
Answer:
Boiling point of water increases wben salt is added to the water this propertiy is known as elevation of boiling points
Explanation:
What is one technology scientists use to help forecast
earthquakes
Answer:
they often use a radon detector to help forecast earthquakes
What is the energy of a photon using the given frequency and Planck's
constant. *
Frequency (v)= 5.2x10155-1
h=6.626x10-34j.s
Answer:
Energy of photon is 34.45 ×10⁻¹⁹ J.
Explanation:
Given data:
Frequency of photon = 5.2×10¹⁵ s⁻¹
Plancks constant = 6.626×10⁻³⁴ Js
Energy of photon = ?
Solution:
Formula:
E = h.f
by putting values,
E = 6.626×10⁻³⁴ Js × 5.2×10¹⁵ s⁻¹
E = 34.45 ×10⁻¹⁹ J
Thus, energy of photon is 34.45 ×10⁻¹⁹ J.
Describe the Barium chlorate (Ba(ClO3)2) breaks down to form barium chloride and oxygen. What is the balanced equation for this reaction? When counting atoms in parentheses, multiply all subscripts by the number outside the parentheses to get the number of atoms.
Answer:
Ba(ClO3)2(s)> BaCl2(s) + 3 O2(g)
Explanation
You have to balance the equation to get the same number of oxygens as on the other side with the reactants. So adding a 3 before O2 gives you six oxygens on each side.
Why is carbone reduction process not applied for the extraction of alkali
2k+Cl2=2KCI how many grams of KCl is produced from 8.50 g of K and excess Cl2
Answer:
Mass = 16.4 g
Explanation:
Given data:
Mass of K = 8.50 g
Mass of KCl produced = ?
Solution:
Chemical equation:
2K + Cl₂ → 2KCl
Number of moles of K:
Number of moles = mass/ molar mass
Number of moles = 8.50 g/ 39 g/mol
Number of moles = 0.22 mol
Now we will compare the moles of potassium and potassium chloride.
K : KCl
2 : 2
0.22 : 0.22
Mass of KCl:
Mass = number of moles × molar mass
Mass = 0.22 mol × 74.55 g/mol
Mass = 16.4 g
i need help mbrainliest
Answer:
Heterogeneous- C, Homogeneous-D, Emulsion-B, Colloid-A
Explanation:
Pam's family is clearing some land, and there is a large boulder sitting on top of the ground. Even with the entire family pushing on it, they cannot mov
it. Which type of friction exists between the boulder and the ground
Answer:
d
Explanation:
I believe the answer to this question is d , I believe this as the question doesn't explain properly the surface under the boulder. it is questionable as the question is not clear though I believe this as there must be friction under the boulder stopping it from moving.
What is the defintion of speed of light
Answer:
a fundamental universal constant, the speed at which light and all forms of electromagnetic radiation travel in a vacuum, standardized ...
Explanation:
299 792 458 m / s
Calculate the percent composition of each element in K2C104. You should have a percentage for potassium, sulfur, and oxygen.
K= _%
Cl= _%
O= %
Answer:
K= 44.018%; S= 19.957%; O= 36.025%
Explanation:
your welcome
If u (x) = negative 2 x squared and v (x) = StartFraction 1 Over x EndFraction, what is the range of (u circle ma poottay
If the spheres represent an atom
and an anion of the same element, which sphere represents the atom?
Select one:
Answer:
a is the answer I know and if I'm right mark me brainlest
4.18 L of oxygen, O2, at STP is how many molecules of O2?
Answer:
1.12 × 10²³ molecules O₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KExplanation:
Step 1: Define
4.18 L O₂
Step 2: Identify Conversions
Avogadro's Number
STP - 22.4 L / mol
Step 3: Convert
[tex]4.18 \ L \ O_2(\frac{1 \ mol \ O_2}{22.4 \ L \ O_2})(\frac{6.022 \cdot 10^{23} \ molecules \ O_2}{1 \ mol \ O_2} )[/tex] = 1.12375 × 10²³ molecules O₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
1.12375 × 10²³ molecules O₂ ≈ 1.12 × 10²³ molecules O₂
jones soda contains 33g added sugar in a 355 ml bottle. calculate the molarity of sugar in this beverage
0.56M
15.4M
0.51M
0.00051M
The molarity of sugar in this beverage : 0.51 M
Explanation:
Given
mass of soda=solute=33 g
volume of bottle=solution=355 ml
Required
the molarity of sugar
Analysis
Convert mass to mol of sugarFind molarity :[tex]\tt M=\dfrac{n}{V}[/tex]
Solution
mol of sugar-C₆H₁₂O₆(MW=180.16 g/mol g/mol)[tex]\tt mol=\dfrac{33}{180.16 g/mol g/mol}=0.1832[/tex]
molarity(volume=355 ml=0.355 L)[tex]\tt M=\dfrac{0.1832}{0.355}=0.51~M[/tex]
2nd time posting someone please help
Answer:
Sb: Antimony
Si: 14 (atomic Number)
S: 32.06 u (atomic mass)
Explanation:
Matching: Which organelle makes proteins?
A. cell membrane
B. nucleus
C. endoplasmic reticulum
D. mitochondria
E. cell wall
F. ribosomes
A.
B.
C.
D.
E.
F.
Oceanic crust
Continental crust
Upper mantle
Upper mantle
In the diagram above, tectonic plate movement has created a volcanic mountain range. Which of the following provides the best explanation as to why this happened?
(AKS 29 DOK 2)
O A
An oceanic plate converged with a continental plate, and both plates subducted causing lava to rise up through a weak spot in Earth's crust to create
volcanic mountains.
ОВ
An oceanic plate converged with a continental plate, and neither plate subducted causing lava to rise up through a weak spot in Earth's crust to create
volcanic mountains.
Ос.
An oceanic plate converged with a continental plate. The more dense continental plate sank below the less dense oceanic plate causing magma to rise up
through a weak spot in Earth's crust to create volcanic mountains.
D. An oceanic plate converged with a continental plate. The more dense oceanic plate sank below the less denso continentetplate causing magma to rise up
through a weak spot in Earth's crust to create volcenie mountains.
Answer: It would be C
