Given
speed = 1000 m/s or velocity (v) = 1000 m/s
frequency (f) = 500 Hz
wavelength (λ) = ?
We know,
λ = v/f
λ = 1000/ 500
λ = 2 m
It's wavelength is 2 m.
Hope it will help :)
If a wave has a wave speed of 1000 M/S anything see a 500 HZ, the wavelength of wave is 2 m.
What is wavelength?
The distance among identical spots between two succeeding waves is known as the wavelength, which is a feature of waves. The wavelength of a wave is the distance among one wave's peak (or trough) and the next. In mathematics, the Greek symbol lambda () is used to denote wavelength.
The color of light is determined by its wavelength, and the pitch of sound is determined by its wavelength. The visible spectrum of light has wavelengths between around 700 nm (red) and 400 nm (violet). The color of light is determined by its wavelength, and the pitch of sound is determined by its wavelength.
speed = 1000 m/s
frequency = 500 Hz
wavelength (λ) = ?
λ = v/f
λ = 1000/ 500
λ = 2 m
Therefore, the wavelength of wave is 2 m.
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Why is this a redox reaction?
A student decides to use the technique employed in Part B of this lab to determine the density of vodka. He first fills a buret with vodka to an initial volume of 1.52 mL. He then drains out some of the vodka into an empty beaker with a mass of 13.687 g. The final buret volume is 9.62 mL. If the combined mass of the beaker and vodka is 21.123 g, what is the the density of the vodka
Answer:
Explanation:
Volume of vodka = 9.62 - 1.52 = 8.10 mL drained into beaker .
Mass of vodka drained out = 21.123 - 13.687 = 7.436 g
density of vodka = mass / volume
= 7.436 / 8.10 g / mL .
.918 g / mL .
help please, please,please. ....
Answer:
the answer is nitrogen
Explanation:
u can right this for explain your answer-
( nitrogen is unreactive
nitrogen doesn't support burning )
orrrrr
(contains no oxygen
all the other jars contain oxygen)
4. Both vitamins and minerals are called protective foods. (True/False)
Answer:
true
Explanation:
hope this answer helps :)
Answer:
true
Explanation
vitamins and minerals are protective foods
Typically, water runs through the baseboard copper tubing and, therefore, fresh hot water is constantly running through the piping. However, consider a pipe where water was allowed to sit in the pipe. The hot water cools as it sits in the pipe. What is the temprature change, (ΔT), of the water if 194.0 g of water sat in the copper pipe from part A, releasing 1238 J of energy to the pipe? The specific heat of water is 4.184 (J/g)⋅∘C.
Answer:
[tex]\Delta T=1.53\°C[/tex]
Explanation:
Hello!
In this case, since the problem is providing mass, energy, and specific heat of water, we can write the following equation that relates them to each other:
[tex]Q=mC\Delta T[/tex]
In such a way, we get rid of both m and C, to solve for the change in temperature:
[tex]\Delta T=\frac{Q}{mC}[/tex]
Now we plug in the data to obtain:
[tex]\Delta T=\frac{1238J}{194.0g*4.184\frac{J}{g\°C} }\\\\\Delta T=1.53\°C[/tex]
Best regards!
How many different elements are combined in sulfur dioxide
Answer: 2elements sulfur and oxygen
Consider the following data:
HfCo2 = -393.5 kj/mol
HfH20 = -241.82 kj/mol
Hfc2h6 = -84.68 kj/mol
Using these data, calculate Delta HRXN
for this chemical reaction. Round to the nearest whole number.
2C2H6(g) + 7O2(g) -> 4CO2(g) + 6H2O(g)
Answer:
if you ask yahoo answers it will tell you
Explanation:
hope i helped
Answer:
-2856
-792
endothermic, exothermix, exothermic, endothermic
no
Explanation:
ron (II) hydroxide, Fe(OH)2, is very insoluble in water. Hence, if it is produced during an aqueous reaction it will precipitate from solution. How many grams of sodium hydroxide (a strong base) must be added to 42.7 mL of a 0.305 M aqueous solution of iron (II) nitrate, in order to precipitate all of the iron as Fe(OH)2
Answer:
1.04g of NaOH must be added to precipitate all of the iron
Explanation:
Based on the chemical reaction:
Fe(NO₃)₂(aq) + 2NaOH(aq) → Fe(OH)₂(s) + 2NaNO₃(aq)
Where 1 mole of Iron (II) nitrate reacts with 2 moles of NaOH to produce 1 mole of Fe(OH)₂
To solve this question we need to find the moles of Fe(NO₃)₂ and using the chemical reaction we can find the moles of NaOH and its mass:
Moles Fe(NO₃)₂:
0.0427L * (0.305mol / L) = 0.0130moles of Fe(NO₃)₂
Moles NaOH
0.0130moles of Fe(NO₃)₂ * (2mol NaOH / 1mol Fe(NO₃)₂) =
0.0260 moles NaOH
Mass -Molar mass NaOH = 40g/mol-:
0.0260 moles NaOH * (40g / mol) =
1.04g of NaOH must be added to precipitate all of the ironWhy are there few fossils of protists. write a paragraph response
Answer:
protists that produce a hard outer covering have left many fossils, other protists lack hard parts, so few fossils of these organisms have been found. ... Protists in this group are called plantlike because, like plants, they contain the pigment chlorophyll in chloroplasts and can make their own food.
Explanation:
Hope it helps, some how.
Chemistry student measured the boiling point of lyric acid to be 40°C the actual boiling point of lyric acid is 43.2°C what is the percent error for this measurement?
The percent error of Chemistry student : 7.4%
Further explanationGiven
40 °C measurement
Required
The percent error
Solution
% Error : difference between the theoretical value and the actual value
or
% Error : Absolute Error / Accepted Value
Absolute Error = Measured Value - Accepted Value
% Error for Chemistry student :
1. Subtract the measurement value with the accepted value
= 40 °C - 43.2 °C
= -3.2 °C
2. Divide by the accepted value, and multiply by 100
= |-3.2/43.2| x 100%
= 7.4%
For the reaction CH4 +2O2 = CO2 +H2O
How many grams of water (H2O) are produced from the combustion of 6.35 moles of methane (CH4)? Please show all work.
reaction
CH₄ + 2 O₂ ==> CO₂ + 2 H₂O (Equal)
first, let's count the mole of H₂O that formed
mole H₂O = (coefficient of H₂O / coefficient of CH₄) x mole CH₄
mole H₂O = (2/1) x 6,35 mole
mole H₂O = 12,7 mole
so
Mass H₂O = mole H₂O x Molecular Mass
Mass H₂O = 12,7 mole x 18 ((2 x Ar H) + Ar O)
Mass H₂O = 228,6 g
what is metal and non metal with differenties
Answer:
i have no clue
Explanation:
i have no clue
Answer:
hope it helps...
Explanation:
Elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal. Metals (like copper and aluminium) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators.
In sediments and waterlogged soil, dissolved O2 concentrations are so low that the microorganisms living there must rely on other sources of oxygen for respiration. Some bacteria can extract the oxygen in sulfate ions, reducing the sulfur in them to hydrogen sulfide gas and giving the sediments or soil a distinctive rotten-egg odor.
Required:
a. What is the oxidation number of sulfur in these compounds?
b. Write the net ionic equation for the reaction under acidic conditions (H3O+) that releases O2 from sulfate and forms hydrogen sulfide gas. Use water as the reactant In the hall-reaction that describes the formation of oxygen.
Answer:
1) SO₄ ²⁻ : (+6)
H₂S : (-2)
Explanation:
a) Sulfate reducers are widespread in muds and other sediments, water-logged soils, etc., environments that contain SO₄ ²⁻ and become anoxic as a result of microbial decomposition.
Sulfate (SO₄ ²⁻), the most oxidized form of sulfur (+6), is reduced by these
sulfate-reducing bacteria. The end product of sulfate reduction is hydrogen sulfide, H₂S, (oxidation number -2) an important natural product that participates in many biogeochemical processes. The H₂S they generate is responsible for the pungent smell (like that of rotten eggs) often encountered near coastal ecosystems. When sulfate-reducing bacteria grow, the H₂S formed from SO₄ ²⁻ reduction combines with the ferrous iron to form black, insoluble ferrous sulfide, which is not toxic. This is important for the conservation of the environment.
b) The net ionic equation under acidic conditions is:
4 H₂ + SO₄²⁻ + H⁺ → HS⁻ + 4 H₂O
Global reaction: SO₄²⁻ + 2H⁺ → H₂S + O₂
At what temperature will 7.2 moles of a gas under 107.5 kPa of pressure that takes up 748 cm^3 be?
The temperature = T = 1.29 K
Further explanationGiven
n = 7.5 moles
P = 107.5 kPa = 1,0609425 atm
V = 748 cm³ = 0.748 L
Required
Temperature
Solution
Ideal gas law :
PV = nRT
T = (PV)/(nR)
T = (1,0609425 x 0.748)/(7.5 x 0.08205)
T = 1.29 K
Please help me ASAP I’ll mark Brainly
Answer:
Electrical, heat, and light
Explanation:
True or false: elements are atoms or molecules that have a net charge
Answer:
true
Explanation:
Is acid rain a global or a regional concern ?
Explanation:
Acid rain is linked to both natural and man-made sources. Nitrogen oxides are formed through the extreme heating of air when a thunderstorm produces lightning. ... For this reason, acid rain is considered a global problem
Answer:
Acid rain is a global concern.
Explanation:
The effects of acid rain have reached dramatically mainly in the industrialized countries which fall on global ecology.
Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction entropy of the following chemical reaction: Round your answer to zero decimal places. N2 O2 yields NO2
Answer:
-122 J/K
Explanation:
Let's consider the following balanced reaction.
N₂(g) + 2 O₂(g) ⇒ 2 NO₂(g)
We can calculate the standard reaction entropy (ΔS°) using the following expression.
ΔS° = Σ ηp × Sf°p - Σ ηr × Sf°r
where,
η: stoichiometric coefficients of products and reactantsSf°r: entropies of formation of products and reactantsΔS° = 2 mol × 240.06 J/K.mol - 1 mol × 191.61 J/K.mol - 2 mol × 205.14 J/K.mol
ΔS° = -121.77 J/K ≈ -122 J/K
four difference between electrolytic cell and electrochemical cell
Answer:
Electrochemical cells convert chemical energy into electrical energy or vice versa. Electrolytic cell is a type of electrochemical cell in which electrical energy is converted into chemical energy. ... Electrolytic cells consist of positively charged anode and a negatively charged cathode.
I hope it's help
Which statement correctly describes protons?
A. They have no charge and are present in the nucleus of an atom.
B. They have a negative charge and travel around the nucleus of an atom.
C. They have a positive charge and travel around the nucleus of an atom.
D. They have a positive charge and are present in the nucleus of an atom along with the neutrons.
Answer:
d
Explanation:
it's basic chemistry. electrons are negative and travel around the outside. neutrons are neutral and in the nucleus with the proton
balance the chemical reaction ___ Al + ___ FeO → ___ Al2O3 + ___ Fe
Answer:
2Al+3FeO→Al2O3+3Fe
Explanation:
Basically, to get this answer, you need to balance the amount of Aluminum to the ammount on the other side which is 2 so you need 2 Al to balance the reaction correct, next you move on to the amount of Oxygen in the reaction, there are three Oxygen’s on the right and one on the left, so you need 3 FeO in order for the Oxygens to be balanced. Now that the Iron is unbalanced on both sides, you need 3 Fe (on the right) in order for the equation to be balanced.
The balanced chemical reaction is [tex]2Al+3FeO[/tex] → [tex]Al_2O_3+3Fe[/tex]
What is a balanced chemical reaction?A balanced chemical equation occurs when the number of atoms involved on the reactants side is equal to the number of atoms on the products side.
To balance a reaction means to make the number of atoms the same on both the reactants and products sides. To do so, coefficients need to be added to the chemical equation.
Hence, the balanced the chemical reaction is [tex]2Al+3FeO[/tex] → [tex]Al_2O_3+3Fe[/tex].
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how many particles would be found in a 2.1 mol sample of AlPO4?
1.3 × 10²⁴ particles AlPO₄
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
2.1 mol AlPO₄
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 2.1 \ mol \ AlPO_4(\frac{6.022 \cdot 10^{23} \ particles \ AlPO_4}{1 \ mol \ AlPO_4})[/tex]Multiply/Divide: [tex]\displaystyle 1.26462 \cdot 10^{24} \ particles \ AlPO_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
1.26462 × 10²⁴ particles AlPO₄ ≈ 1.3 × 10²⁴ particles AlPO₄
B. Each atom is neutrally charged, which means that each atom has the same number of protons and
electrons. Based on this, how many protons are in each atom?
Sodium
Chlorine
How many grams are presented in a 7.4 moles sample of H2O?
Answer:
130g
Explanation:
For every mole of a substance, there is a molar mass that coincides with the masses on the periodic table. For one mole of H2O, you would add the molar masses of the two hydrogen atoms and the oxygen atom to get 18.016g. You would then take this molar mass and multiple it by the amount of moles present (7.4) to get 133.3184g
From here, you would round to the significant figures to get 130g
4)
The color of your eyes is an example of an inherited trait. These are the traits that are passed down to you from your parents.
How are inherited traits like this passed from parents to their children?
A)
Traits like this are developed over a long period of time.
ht
B)
Traits like this are responsible for the way you look, act, and feel.
ing
42
ols
Traits like this are determined by the genes passed from parents to their
children.
D)
Traits like this are determined by the knowledge passed from parents to
their children
Answer:
Explanation: C
According to the law of conservation of mass, in any chemical change:
the mass of reactants is greater than the mass of products
O the mass of reactants is less than the mass of products
the mass of reactants is equal to the mass of the products
the masses of products and reactants have no predictable relationship
Answer:
The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. ... The carbon atom changes from a solid structure to a gas but its mass does not change. Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.
The correct statement is 'the mass of reactants is equal to the mass of the products'.
Explanation:
The law of conservation of mass states that 'in chemical reaction mass can neither be created nor be destroyed.According to this law total mass of reactant before chemical reaction is eqaul to total mass of the products after the chemcial reaction.The number of atoms of taking part in chemical remains the same before and after the course of chemical reaction.So, from this we can conclude that the from the given statements the correct statement is 'the mass of reactants is equal to the mass of the products'.
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Which of the following does NOT change the amount of resistance to the flow of
electrons in a wire?
Length of the wire
Diameter of the wire
Amount of insulation surrounding the wire
O
The material the wire is made from
Answer:
Amount of insulation surrounding the wire
Which chemical equation is unbalanced?
A). C+O,, CO,
B). Sr t+ O2 2SFO
C). 6H, + 30, 6H,O
D). H, +H, +O,-→ H,0 + H,O
Answer:
The options in this question are unclear, the clear options are as follows:
A. C + O2 → CO2
B. Sr + O2 → 2SrO
C. 6H2 + 3O2 → 6H2O
D. H2 + H2 + O2 → H2O + H2O
The answer is B
Explanation:
A balanced chemical equation is that equation in which atoms of each elements in the reaction are of equal number on both sides of the equation (product and reactant). To balance a chemical equation, coefficients are used.
In this question, four chemical equations are given as follows:
- C + O2 → CO2
In this equation, atoms of carbon (1) and oxygen (2) are the same on both sides, hence, it is BALANCED.
- Sr + O2 → 2SrO
In this equation, Sr has 1 atom on the reactant side but 2 atoms on the product side. Hence, it is UNBALANCED. The balanced equation will be: 2Sr + O2 → 2SrO
- 6H2 + 3O2 → 6H2O
In this equation, atoms of hydrogen (12) and oxygen (6) are the same on both sides, hence, it is BALANCED.
- H2 + H2 + O2 → H2O + H2O
In this equation, atoms of hydrogen (4) and oxygen (2) are the same on both sides, hence, it is BALANCED.
PLEAS EHELPP!!
True or false: lone pairs of electrons around the central atom do not influence the shape
of the molecule.
HELP PLEASE ANSWER PLEASE ITS URGENT!!
-unnecessary comments will be reported.
Answer:
19. 1, 2, 3, 4, 5, 6, 7, 8
20. Li=1+, Be=2+, B=3+, C=4+
21. N=3-, O=2-, F=1-
Explanation:
