Answer:
False
Explanation:
Brainliest??
what is the Sequence the different segments of the visible spectrum in order from shortest wavelength to
longest wavelength.
Answer:The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.
Explanation:
The different segements of the visible spectrum is form violet to red color. The wave lenth is goes on oncreases from violet to red color. Longest wavelength in visible spectrum is red and shortest is violet.
What is electromagnetic spectrum?Electromagnetic spectrum is a collection of a range of waves in a sequential order. The radio waves have the highest frequency and the gamma rays have the shortest wavelength.
In electromagnetic spectrum visible spectrum is one of small portion, which comes around 400 to 700nm. In that 7 colors are divided.
I.e. VIBGYOR, where violet is the lowest wave length and red is the longest wavelength. In the electromagnetic spectrum from left to right wavelength goes on incresses form gamma to radio waves. Gama rays have highest energy and radio waves have less energy.
Thus, the sequence of different segemetns is Violet, indigo, blue, green, yellow, orange and red from shortest wavelength to longest wavelength.
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When molten magma cools ________ under the surface, it forms _________ igneous rocks.
A. rapidly, extrusive
B. slowly, extrusive
C. rapidly, intrusive
D. slowly, intrusive
Which of the following is a good Observation?Bees are attracted to honey.If dogs are given a choice between beef and chicken, then they will prefer to eat beef over chicken because it is juicier.If people exercise, then they will live longer.If bees have a choice between red and yellow flowers, then they will prefer the red flowers.
Answer:
if bees have a choice between red and yellow flowers, then they will prefer the red flowers.
Explanation:
this is because red flowers have a very intense attractive brightening appears the makes it very visible to the bee and also, red flowers produce more nectar
how to balance equations step by step?
Here's a step-by-step guide on how to balance chemical equations. Balancing chemical equations may take some practice, but with a bit of effort, you can learn to balance any equation.
Step 1: Write the unbalanced chemical equation
Write the chemical equation for the reaction you want to balance, using chemical formulas for the reactants and products. For example, the equation for the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O) is:
H2 + O2 → H2O
Step 2: Count the number of atoms of each element
Count the number of atoms of each element on both sides of the equation. This will give you an idea of which elements are not balanced. For the example equation above, you would count:
H: 2 on the left, 2 on the right
O: 2 on the left, 1 on the right
Step 3: Balance the most complex molecule first
If there is a molecule that contains multiple atoms of a single element, balance that molecule first. In the example equation above, water (H2O) contains two hydrogen atoms and one oxygen atom, so it's a good molecule to start with.
Step 4: Use coefficients to balance the equation
Add coefficients (whole numbers) in front of the chemical formulas to balance the number of atoms of each element on both sides of the equation. Start with the most complex molecule and work your way out. For example:
H2 + O2 → 2H2O
This balances the number of hydrogen atoms (4 on both sides) and the number of oxygen atoms (2 on both sides).
Step 5: Check your work
Double-check your work to make sure that the number of atoms of each element is the same on both sides of the equation. In the balanced equation above, there are 2 hydrogen atoms and 2 oxygen atoms on both sides.
That's it! Balancing chemical equations may take some practice, but with a bit of effort, you can learn to balance any equation.
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6. Perform the following calculations and report each answer to the correct number of significant figures: a. 162.1 g + 38.73 g + 1.554 g
b. 21.9 m + 6.34 m + 157 m
c. 0.004 dm + 0.12508 dm
d. 2.0 L + 2.4L + 2.51L
e. .025 mol + .0267 mol + .00287 mol
f. 9.88 s-7.2 s
g. 44.7 kg - 2.7 kg
h. 20 L - 20.0 L i. 2.89g - 3.00g
j. 8.894 mL - 9.23 mL
Answer:
Explanation:
a) 202.4 g
b) 185.24 m
c) 0.13 dm
d) 6.91 L
e)0.0546 mol
f) 2.7 s
g) 42kg
h) 0
i) -0.11 g
j) -0.34 mL
which of the following formula/name pairs is incorrect? a. mnco3: manganese(ii) carbonate b. mgso4:magnesium sulfate c. n3o5: trinitrogen pentoxide d. bacl2: barium chloride e. fe2s3: iron(ii) sulfide
c. n3o5: tri nitrogen pentoxide is incorrect because the correct formula should be N2O5, representing two nitrogen atoms and five oxygen atoms in the compound.
The correct formula for trinitrogen pentoxide should be N2O5, not N3O5. Trinitrogen pentoxide consists of two nitrogen atoms (N2) and five oxygen atoms (O5). The prefix "tri-" indicates the presence of three nitrogen atoms. Therefore, the formula N2O5 correctly represents tri-nitrogen pentoxide.
Option c states N3O5 as the formula for tri-nitrogen pentoxide, which is incorrect because it suggests the presence of three nitrogen atoms and five oxygen atoms. The formula should have two nitrogen atoms and five oxygen atoms, as represented by N2O5.
The other formula/name pairs (a. MnCO3, b. MgSO4, d. BaCl2, and e. Fe2S3) are correct and match the correct names of the respective compounds (manganese(ii) carbonate, magnesium sulfate, barium chloride, and iron(ii) sulfide).
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The incorrect formula/name pair is Fe2S3: Iron(II) Sulphide. According to the formula Fe2S3, the correct name should be Iron(III) Sulphide.
Explanation:The question is asking to identify the incorrect formula/name pair among the given options. The pairs are: (a) MnCO3: Manganese(II) Carbonate, (b) MgSO4: Magnesium Sulfate, (c) N3O5: Trinitrogen Pentoxide, (d) BaCl2: Barium Chloride, and (e) Fe2S3: Iron(II) Sulphide.
Using the rules of naming chemical compounds, the incorrect pair is (e) Fe2S3: Iron(II) Sulphide. The Roman numeral (II) in 'Iron(II)' indicates the oxidation number of Iron. According to the given formula, Fe2S3, there are 2 atoms of Iron and 3 atoms of Sulfur. Hence, the correct name should be Iron(III) Sulfide, not Iron(II) Sulfide. All the other pairs are correctly named.
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450 J of heat are added to a 50 g block of lead. What is the resulting
temperature change? c for lead is 0.13 J/g(degC)
Answer:
69.2°C
Explanation:
Recall the heat energy formula
q = cmΔT
where q = heat energy ( measured in joules ) , c = specific heat , m = mass and ΔT = change in temperature.
We are given that:
The heat energy is 450J The mass is 50g The specific heat is 0.13 J/g(degC)Given this we want to find the temperature change.
First we want to define our variables.
Again recall that heat energy (q) = 450J , mass(m) = 50g and specific heat (c) = 0.13 J/g(degC)
Now that we have defined our variables we plug in the values of the variables into q = cmΔT and solve for the undefined variable
q = cmΔT
q = 450 , m = 50, c = 0.13
450 = (50) x (0.13) x (ΔT)
multiply 50 and .13
450 = 6.5 x (ΔT)
divide both sides by 6.5
69.2 = ΔT
The change in temperature was 69.2°C
Describe how a constant volume calorimeter can be used to measure the heat transferred from a burning piece of coal to cool water.
thank you <3
Answer:
A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.
Explanation:
Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.
- When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.
A burning piece of coal which is releasing heat due to its combustion and is transferred to water.
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short note on carbon and it's compounds
Answer:
Carbon compounds are defined as chemical substances
Explanation:
Carbon compounds are defined as chemical substances containing carbon. More compounds of carbon exist than any other chemical element except for hydrogen.
Is there a periodic trend in oxidation strength of the halogens?
Explanation:
As the halogens become less reactive down the group, their oxidising ability decreases. Remember that oxidation is a gain of electrons. Halogens become less oxidising as you move down the group as it is more difficult to gain an electron.
Give three examples of environmental, industrial and bio-chemistry.
Three examples of environmental, industrial and bio-chemistry are listed below:
Environmental chemistry: Contamination, Atmospheric Deposition, and Soil Pollution.industrial chemistry: industrial inorganic chemicals, industrial organic chemicals, and agricultural chemicalsbio-chemistry: genetic, immunology, and enzymologyMeaning of ChemistryChemistry can be defined as a branch of science which is concerned with the substances matter is composed of, their properties and reactions,
Chemistry also deals with the use of such reactions to form new substances.
In conclusion, Three examples of environmental, industrial and bio-chemistry are listed anove
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____________ rays show areas where large quantities of energy are released.
Answer:
Gamma
Explanation:
Answer:
Gamma
Explanation:
How many moles of Na2SO4 are present in 284.078 grams of Na2SO4?
2
3
5
6
Answer:
2
Explanation:
\(mole = \frac{mass}{relative \: molecular \: mass} \)
Mass of Na2SO4 = 284.078g
Relative Molecular Mass = 142g/mol
\(therefore \\ mole = \frac{284.078}{142} \)
mole = 2.000549
mole ≈ 2
What is the % dissociation of a solution of acetic acid if at equilibrium the solution has a pH = 4.74 and a pKa = 4.74?
Answer:
\(\% diss = 50\%\)
Explanation:
Hello there!
In this case, when considering weak acids which have an associated percent dissociation, we first need to set up the ionization reaction and the equilibrium expression:
\(HA\rightleftharpoons H^++A^-\\\\Ka=\frac{[H^+][A^-]}{[HA]}\)
Now, by introducing x as the reaction extent which also represents the concentration of both H+ and A-, we have:
\(Ka=\frac{x^2}{[HA]_0-x} =10^{-4.74}=1.82x10^{-5}\)
Thus, it is possible to find x given the pH as shown below:
\(x=10^{-pH}=10^{-4.74}=1.82x10^{-5}M\)
So that we can calculate the initial concentration of the acid:
\(\frac{(1.82x10^{-5})^2}{[HA]_0-1.82x10^{-5}} =1.82x10^{-5}\\\\\frac{1.82x10^{-5}}{[HA]_0-1.82x10^{-5}} =1\\\\\)
\([HA]_0=3.64x10^{-5}M\)
Therefore, the percent dissociation turns out to be:
\(\% diss=\frac{x}{[HA]_0}*100\% \\\\\% diss=\frac{1.82x10^{-5}M}{3.64x10^{-5}M}*100\% \\\\\% diss = 50\%\)
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A 22.0 g block of copper at 45°C absorbs 2.50 kJ of heat. Given the specific heat of Cu is 0.385 J/g·°C what will be the final temperature of the Cu?
Answer: 340°C
Explanation: To calculate the temperature we have a formula:
q=mcΔT-------------(1)
Given that q=2.50kJ
m=22.0g
c=0.385J/g°C
T1=45°C
ΔT=change in Temperature(T2-T1)
Now calculate the temp substitute these values in euation(1)
2.50= (22.0*0.385)(x-45)
2.50 = 8.47(T2-45)
2.50=8.47T2-381
T2=340°C
Hence,the final temperature of cu ic 340°C
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what is the empirical formula a compound (which contains only c, h and o) if the combustion of 0.255 grams of the compound produces 0.561 grams of co2 and 0.306 grams of h2o?
An empirical chemical formula is one that provides the proportions (ratios) of the elements present in the complex but not the exact number or arrangement of atoms. This would be the compound's element to whole number ratio with the lowest value.
What is an element?An essential component of a whole. Refers to a straightforward substance that cannot be divided into smaller components or transformed into another chemical in chemistry. An atom, which is made up of protons, neutrons, and electrons, is the building block of an element. A given element's atoms all contain the same number of protons.A chemical compound that cannot be converted into another chemical substance is referred to as an element. Chemical elements are distinguishable from one another by the number of protons in the nucleus of their atoms, which is the fundamental particle that makes up a chemical element. The minuscule components that make up matter are called elements.To learn more about element refer to:
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What is the Molecular Formula for Fiber?
Answer:
Description. Dietary fiber is mostly derived from the plant cell wall. It mainly includes cellulose, hemicellulose, pectic polysaccharides, oligosaccharides, resistant starch, and lignin.
Explanation:
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What are 3 things that
happen to your body when you start exercising
regularly?
Explanation:
Weight loss and weight maintenance.
Muscle gain.
Improved mood.
Improved heart health.
2. you are age dating an ancient volcanic lava flow and decide to analyze for u235/lead 207 to determine
of the lava flow. upon analysis you determine the sample contains 3.125% u235.
the age
a. what is the half life of the parent/daughter isotope pair you analyzed?
The half life of the parent/daughter isotope pair we analyzed is 0.518 year.
The half life of the parent/daughter isotope pair we analyzed is 0.518 year. You are age dating an ancient volcanic lava flow and decide to analyze for u235/lead 207 to determine the half life and full life of the lava flow. upon analysis you determine the sample contains 3.125% u235 the age. So, we conclude that 0.518 half-lives have passed since the formation of this mineral sample. To determine the absolute age of this mineral sample, we simply multiply y (= 0.518) times the half life of the parent atom (=2.7 million years). In the United States, the best place to look for active lava flow would be in Hawaii. And, just earlier this year in 2018, there was an active event that lasted for months. Hence by this we can consider that the half life of the parent/daughter isotope pair we analyzed is 0.518 year.
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if you add 15 grams of sodium chloride to 250 grams of water, what will the freezing and boiling points of the resulting solution be? hint: use the molal boiling point elevation and freezing point depression constants chart to find the k values.
The solution's boiling point will be 101.5 C. Freezing point depression = 2 * 1.027 * kg * mol * kg * mol * = 3.82 K. Thus, the solution's fusion point will be 3.8 C.
Why does NaCl solution freeze at a lower temperature than water does?The vapour pressure drops when a non-volatile solute is dissolved in a solvent. A lower temperature is needed for the solvent to freeze as a result.
Why does freshwater freeze more quickly than seawater?Due to the salt in seawater, it freezes at a lower temperature than fresh water—approximately 28.4 degrees Fahrenheit. Yet, because only the water part of seawater freezes, very little salt is present in the ice when it is formed.
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Fire ants move in to a new environment with the lizards.what will most likely happen to the lizard population over the next several years
Answer:
Some lizards in the eastern U.S. have adapted to invasive fire ants -- which can bite, sting, and kill lizards -- reversing geographical trends in behavioral and physical traits used to avoid predators. A new study describing this reversal appears online on November 29, 2018, in the journal Global Change Biology and reveals that new environmental challenges can override the historical influences that originally determined geographical trends in traits.
"Rapid environmental change, be it from changing climate or the introduction of invasive species, is putting a lot of pressure on native species," said Christopher Thawley, graduate student at Penn State at the time of the study and first author of the paper. "Usually when researchers look at how native species might respond to these kinds of threats, they might measure one characteristic of the animal and at one or a few sites. In this study, we looked at three separate characteristics of eastern fence lizards from thirteen sites spanning a thousand miles and found that these lizards are capable of adapting in a concerted way to meet the threat of invasive fire ants, and in a relatively short time frame."
Explanation:
Pedro adds 1.25 moles of helium to a balloon that already contained 4.51 moles of helium creating a balloon with a volume of 8.97 liters. What was the volume of the balloon before the addition of the extra gas
Answer:
don't know what u mean by that
Explanation:
so help me
explain the difference between weathering and erosion.
Answer:
So, if a rock is changed or broken but stays where it is, it is called weathering. If the pieces of weathered rock are moved away, it is called erosion.
nitric acid (63 g) and sodium hydroxide (60 g) are mixed. determine how many grams of water will form.
17.99 g of water will formed when nitric acid (63 g) and sodium hydroxide (60 g) are mixed.
When nitric acid and sodium hydroxide are mixed, a neutralisation reaction takes place, with the salt created by the two substances and water serving as the reaction result. The rational response to the statement in this instance is:
Na(OH) + HNO3 ⇒ NaNO3 + H2O
• The formula for HNO3's molar mass is 3xmO + mH + mN, or 3x15.99g + 1g + 14g = 62.97 g/mol.
• The formula for NaOH molar mass is: mO + mH + mNa = 15.99g + 1.00g + 22.99g = 39.98 g / mol.
18g of water and 63g of HNO3
17.99 g of water from 62.97 g of HNO3
62.97 g divided by 18 g and 63 g equals 17.99 g of water.
As a result, 17.99 g of water will form.
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what are the reactants in the following equation: hcl(aq) nahco₃(aq)→ co₂(g) h₂o(l) nacl(aq)
Hydrogen chloride (HCl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and NaCl(aq).
The reactants in the following equation:
HCl (a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na C l (aq) are hydrogen chloride (HC l) and sodium bicarbonate (NaHCO3).
Explanation:
A reactant is a substance that undergoes change during a chemical reaction. A reaction equation includes the symbols and formulas of reactants and products, along with the physical states of the substances, as they appear before and after the reaction.
The chemical reaction in this question is: HC l(a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na Cl (a q)In this equation, the reactants are H Cl (a q) and NaHCO3(a q), which are in an aqueous state.
Therefore, hydrogen chloride (H Cl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and Na Cl (a q).
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what do opposite electric forces do
Answer:
Charges that are opposite each other, such as positive and negative charges, draw each other. Like charges repel each other, such as two negative charges or two positive charges.
Explanation:
Answer:
Opposite electric forces attract each other.
Like if it's positive and negative they will come together.
If they are the same(positive and positive or negative and negative) they will repel each other.
Explanation:
Plz help me...!!! I need this answer by today!....
What is the weight of a 98 kg astronaut on the Mars where the value of the gravitational pull is 3.711 m/s2?
What is his mass on earth? What is his weight on Venus where the gravitational pull is 8.87 m/s2?
Answer:
Explanation:
given mass on earth =98 kg
gravitational pull on mars =3.711 m/s2
gravitational pull on venus =8.87 m/s2
weight of the body on mars =weight on earth/9.81 m/s2 *3.711 m/s2
W=98 kg*3.711 /9.81m/s2
W=37.07 kg
weight on the venus =weight on earth*8.87 m/s2 /9.81 m/s2
W= 98 kg*7.87 m/s2/9.81 m/s2
W=78.62 kg
how much heat is required to convert a block of ice of mass 42.30 g at 25.042 8c into water vapor at 150.35 8c?
The amount of heat required to convert a block of ice of mass 42.30 g at 25.042 8C into water vapor at 150.35 8C is 31843.08 J.
The process of converting a block of ice to water vapor at a temperature of 150.35 8C requires a significant amount of heat. In order to determine how much heat is required to convert a block of ice of mass 42.30 g at 25.042 8C into water vapor at 150.35 8C, we will need to use the specific heat capacities of water and ice.
First, we need to determine the amount of heat required to melt the ice and then heat it to its boiling point. The heat required to melt ice is given by:
Q1 = m * ΔHfus
Where:
Q1 = heat required to melt the ice
m = mass of ice = 42.30 g
ΔHfus = heat of fusion of water = 333.55 J/g
Substituting the values, we get:
Q1 = 42.30 g * 333.55 J/g
Q1 = 14117.12 J
The heat required to heat the melted ice to its boiling point is given by:
Q2 = m * Cp * ΔT
Where:
Q2 = heat required to heat the ice to its boiling point
m = mass of ice = 42.30 g
Cp = specific heat capacity of water = 4.184 J/g °C
ΔT = change in temperature = (100 - 0) 8C = 100 8C
Substituting the values, we get:
Q2 = 42.30 g * 4.184 J/g °C * 100 8C
Q2 = 17725.96 J
The total amount of heat required to convert the ice to water vapor is given by:
Q = Q1 + Q2
Substituting the values, we get:
Q = 14117.12 J + 17725.96 J
Q = 31843.08 J
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the density of helium in a balloon is 1.18 g/l. if a balloon holds 2.93 l of he, how many atoms of he are in the balloon?
The number of Helium atoms in the balloon is 5.135 × 10²³.
The density of helium in a balloon is 1.18 g/L. the balloon holds 2.93L of He.
The number of atoms of He are in the balloon is ...
Mass of He in the balloon = density of the He × volume of balloon.
= 1.18 g/L × 2.93 L
= 3.4102 g
no of moles of He = given mass of He/atomic mass of He
= 3.4102g/4g/mol = 0.85255 mol
now the no of atoms of He in the balloon = no of moles of He × Avogadro's number
= 0.85255 × 6.023 × 10²³
= 5.135 × 10²³
Therefore the number of Helium atoms in the balloon is 5.135 × 10²³.
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the subatomic particle that determines the ways in which atoms interact with each other in chemical reactions is the?
Answer: The subatomic particle that determines the ways in which atoms interact with each other in chemical reactions is the electron. Electrons are negatively charged particles that orbit the nucleus of an atom. The number of electrons in the outermost energy level, or valence shell, of an atom determines its chemical properties and how it interacts with other atoms in chemical reactions.
Explanation:
The electron, a subatomic particle, determines how atoms behave in chemical reactions. They reside in the outer shells of atoms and their changes in configuration during a reaction lead to new substances, like in the formation of water from hydrogen and oxygen.
Explanation:The subatomic particle that dictates how atoms interact with each other in chemical reactions is the electron. These are found in the outermost energy levels, or shells, of atoms. Changes in their configuration during the course of a chemical reaction lead to the formation of new substances. For instance, in a reaction between hydrogen (H) and oxygen (O) to form water (H2O), the hydrogen atoms each provide one electron and the oxygen atom provides two, creating a bond to form a water molecule.
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