Answer: The answer is D,
Adolescents should be careful about what they eat beacause
Answer:
it can affect your growth, like it can stunt your growth and could get health problems. pls make me brainiest.
A(n)____ is a ripened ovary
Shauna is looking over her family history for heart disease and thought about the easiest way to represent what she discovered. What model is used to show the pattern of traits that are passed from one generation to the next in a family?
dichotomous key
pedigree chart
line graph
punnett square
differentiate between hypothesis and Theory
Answer:
A
Explanation:
edge
Which feature separates watershed
Answer:
Ridges.
Explanation:
Watersheds are separated from one another by ridges. Ridges are elevated boundaries that divide watersheds.
Which of the nine substances are made of four elements?
Answer:
Oxygen mucury carbon dioxide and platinum
Explanation:
When does the energy in the H atom get closer
Answer:
3.48 g
Explanation:
Because its useful.
Explain the differences between bronze and brass, and steel and cast iron. Which is best used for cooking wares?
Answer:
Steel and cast iron
Explanation:
They are all metal but assuming that you are finding the best material for your pan i suggest going for steel or cast iron
ill give brainlist pls help me and don't guess I want full explanation please.
Answer:
C. 3
Explanation:
volume = length×width×height
3×3×3=27
Please help will mark brainliest!! What is the main point of paragraph 3?
Answer:
the highest frequency
Explanation:
Pls 50 points right answer gets brainliest
Explain the meaning of thermal energy transfer and give specific examples of conduction, convection, and radiation.
Answer:
thermal energy: the part of total internal energy that can be transferred (a portion of the kinetic energy)
heat is the thermal energy that flows from one substance to another due to a temperature difference.
Thermal energy is measured in temperature change.
Thermal energy transfer stops when thermal equilibrium is achieved (Both substances at the same temperature).
conduction: Transfer of thermal energy through a solid object like heat transferring up a metal spoon from a hot cup of coffee.
convection: the transfer of thermal energy due to the movement of a liquid or gas caused by differences in temperature. Only in a fluid (liquid or gas). Breezes, ocean currents.
radiation: Transfer energy with or without matter. Warming from the Sun, microwave oven.
Answer:
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission. Hope this helps!
Explanation:
When naming an acid, which of the following is true?
chlorite changes to chloric acid
chlorate changes to chloric acid
none of these is true
chlorate changes to chlorous acid
Answer:
chlorate changes to chlorous acid
1 mole of any gas is equivalent to?
Answer:
22.4 L at standard temperature and pressure.
In ADEF, the measure of F=90°, the measure of ZD=10, and EF = 94 feet. Find the
length of DE to the nearest tenth of a foot.
Answer:
answer. the measure. is f=90 the equbaliint is 180
Explanation:
yan ang sagot ko
Antacid has a pH of 11. What does that tell you about its concentration of hydrogen ions? What does that tell you about its concentration of hydroxide ions?
Answer: The concentration of hydrogen ions is [tex]10^{-11}M[/tex] and the concentration of hydroxide ions is [tex]10^{-3}M[/tex]. Thus the concentration of hydroxide ions is more than the concentration of hydrogen ions.
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]pOH=-\log[OH^-][/tex]
Putting in the values:
[tex]11=-\log[H^+][/tex]
[tex][H^+]=10^{-11}M[/tex]
[tex]pH+pOH=14[/tex]
[tex]pOH=14-11=3[/tex]
[tex]3=-log[OH^-][/tex]
[tex][OH^-]=10^{-3}M[/tex]
Thus the concentration of hydroxide ions is more than the concentration of hydrogen ions.
What volume of Nitrogen measured at s.T.P. Will be produced on heating 33.8g of calcium trioxonitrate
Answer:
9.2288 L
Explanation:
The equation of the reaction is given as;
2 Ca(NO3)2 → 2 CaO + 4 NO2 + O2
From the reaction;
2 mol of Ca(NO3)2 produces 4 mol of NO2
Converting 33.8g to Number of moles;
Number of moles = Mass / Molar mass
Number of moles = 33.8 g / 164.088 g/mol
Number of moles = 0.206 mol
2 = 4
0.206 = x
Solving for x;
x = 0.206 * 4 / 2
x = 0.412 mol
At STP;
1 mol = 22.4 L
0.412 mol = x
Solving for x;
x = 0.412 * 22.4 = 9.2288 L
how do I complete this column graph of the number of conductors vs the number of insulators
the Conductors are:
carbon,iron nail, aluminium foil, copper wire
the Insulators are:
Paddle pop stick
plastic spoon
and please explain how to do it
it's due this Friday the 26th
it is a Science
Answer:
sorry but i am doing this for point
Explanation:
how do I complete this column graph of the number of conduct vs the number of
I am so lost. Does anyone know how to do this??? Enthalpies of reaction stuff
C2H4(g)+3O2(g)→2CO2(g)+2H2O(l) ΔH∘1=?
The combustion of C2H4(g) is represented by the equation above.
(a) Use the enthalpies of formation in the table below to calculate the value of ΔH∘1 for the reaction.
ΔH∘f(kJ/mol)
C2H4(g) 52
CO2(g) −394
H2O(l) −286
O2(g) 0
Please help!!! :(
Answer:
-1464 kJ/mol
Explanation:
The balanced equation for the reaction is given as;
C2H4(g)+3O2(g)→2CO2(g)+2H2O(l) ΔH∘1=?
The enthalpy of the reaction is given by the equation;
Enthalpy of reaction = Enthalpy of products - Enthalpy of reactants
Products:
2CO2(g)+2H2O(l)
Enthalpy of Products = 2 (−394) + 2(−286)
Enthalpy of Products = -1360 kJ/mol
Reactants:
C2H4(g)+3O2(g)
Enthalpy of Reactants = 2 (52) + 3(0)
Enthalpy of Reactants = 104 kJ/mol
Enthalpy of Reaction = -1360 - 104 = -1464 kJ/mol
Why is there a hole in the ozone layer? What do you think the consequences of that hole are?
Answer:
There is a ozone layer because of the special atomphere and chemical conditions that takes place there. I think the consequences of that home area is the very low winter temperatures.
Answer:
There is a hole in the ozone layer because of the pollution on earth. Because of that the UV rays are easily entering the earth through that portion. The consequences of this can be cancers, global warming and disastrous storms.
plz mark as brainliest
How many grams of ammonia would be produced from the reaction of 2.64 moles of hydrogen gas reacting with excess nitrogen?
Answer:
29.92g
Explanation:
tell me if my answer is wrong
what is the grams of molar mass of magnesium
Answer:
4.0359398 × 10^-23 g
Explanation:
All explanations or thoughts led to that answer
before you retire in the evening, you sit down for a snack of milk and cookies. when you waken in the morning, you discover a carton of sour milk on the counter. knowing that milk sours if left in the refrigerator too long, has the reaction rate increased or decreased for the carton of milk on the counter? what has happened to its reaction time
Answer:
Increased
Explanation:
We know that the higher the temperature the higher the rate of reaction. This implies that as the temperature is increased, a reaction tends to proceed faster.
This follows from the collision theory, the higher the temperature, the higher the energy of the reacting particles hence they collide with each other faster and more effectively.
Thus the rate of reaction( or reaction time) for the carton of milk on the counter was increased.
Ba(NO3)2 + 2LiOH → Ba(OH)2 + 2LiNO3
How many nitrate ions are in the products and the reactants of the chemical equation?
A.
one in the reactants and two in the products
B.
three in the reactants and three in the products
C.
two in the reactants and two in the products
D.
six in the reactants and three in the products
Answer:
C.
two in the reactants and two in the products
Explanation:
The law of conservation of mass helps us balance chemical equations so that there are the same number and type of atoms in the reactants and products.
There are two nitrate ions in Ba(NO3)2 and two in 2LiNO3.
An unknown concentration of sodium thiosulfate, Na2S2O3, is used to titrate a standardized solution of KIO3 with excess KI present. Suppose 15.55 mL of the Na2S2O3 solution is required to titrate the iodine formed from 21.45 mL of 0.0135 M KIO3. What is the molarity of the Na2S2O3 solution?
Answer:
0.112M is molarity of the Na₂S₂O₃ solution
Explanation:
First, the KIO₃ reacts with KI as follows:
KIO3 (aq) + 5 KI (aq) + 6 HCl (aq) → 3 I2 (s) + 6 KCl (aq) + 3 H2O (l)
Then, the I₂ produced reacts with the Na₂S₂O₃ as follows:
2 Na2S2O3 + I2 → Na2S4O6 + 2 NaI
Thus, to solve this question, we need to obtain the moles of KIO₃ that react, then, the moles of I₂ produced -Using the chemical reaction- to find the initial moles of Na₂S₂O₃. With these moles and the volume we can find molarity of the solution:
Moles KIO₃:
21.45mL = 0.02145L * (0.0135mol/L) = 2.896x10⁻⁴ moles KIO₃
Moles I₂:
2.896x10⁻⁴ moles KIO₃ * (3mol I₂ / 1mol KIO₃) = 8.687x10⁻⁴ moles I₂
Moles Na₂S₂O₃:
8.687x10⁻⁴ moles I₂ * (2mol Na₂S₂O₃ / 1mol I₂) = 1.737x10⁻³ moles Na₂S₂O₃
As the volume of the titrated solution is 15.55mL, molarity is:
1.737x10⁻³ moles Na₂S₂O₃ / 0.01555L =
0.112M is molarity of the Na₂S₂O₃ solutionThe data shows the number of humans and western pond turtles in a particular county.
800
700
600
500
400
300
200
100
1987
1990
07
1960 1970
1980
number of western pond turtles
human population (in thousands)
What can be inferred about the turtle population?
The turtle population decreases as a result of less livable space.
O The turtle population moves to a new county due to a fear of humans.
The turtle population decreases as a result of natural disasters.
The turtle population moves to a new county due to a change in the climate.
How is Melting and Cooling of Rock like a Chocolate Bar?
Answer:
Melting and cooling of a rock is like a chocolate bar because, when chocolate melts, it happens with heat just like melting of a rock. When chocolate cools, it just becomes a solid with no heat just like rocks when becoming an igneous rock.
Explanation:
You can kinda re-phrase it if u want cause yea. hhah.
what is a molecule??
Answer:
molecule is a group of atoms bonded together representing the smallest fundamental unit of a chemical reaction
A 6.0-V battery does 1200 J of work transferring charge. How much charge is transferred?
answer is below!! hope this helped
A 6.0-V battery does 1200 J of work transferring charge, then 100C charge is transferred.
What is battery ?One or more electrochemical cells with external connections for powering electrical equipment make up an electric battery, which is a source of electric power.
A battery's positive terminal serves as the cathode and its negative terminal serves as the anode when it is delivering electricity.
Electricity is accepted, stored, and released on demand by batteries and similar devices. Like many other common energy sources, batteries store energy through chemistry in the form of chemical potential.
For instance, until they are burned, logs store energy in their chemical bonds for later conversion to heat.
V = 12 V
W = 1200 J
q = ?
V = W / q
12 = 1200 / q
q = 100 C
Thus, A 6.0-V battery does 1200 J of work transferring charge, then 100C charge is transferred.
To learn more about battery follow the link;
https://brainly.com/question/19225854
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Natasha is learning about density in science class. She has been given three different geometric shapes made from different substances and asked to determine which has the greatest density. She measures the masses of the objects and records her results in the table below
What should Natasha do next to determine the relative densities of the objec
A. She should measure the temperature of each object.
B. She should measure the volume of each object.
C. She should measure the surface area of each object.
D. She should measure the circumference of each object.
why is chemistry a science
Answer:
Explanation:
Chemistry is often referred to as the central science because it joins together physics and mathematics, biology and medicine, and the earth and environmental sciences. Knowledge of the nature of chemicals and chemical processes therefore provides insights into a variety of physical and biological phenomena.
Answer:
Science chemistry is the investigation of issue, examining its design, properties and conduct to see what happens when they change in substance responses. Thusly, it very well may be viewed as a part of actual science, close by stargazing, physical science and studies of the planet including geography.
Explanation:
.Science chemistry is fundamental for meeting our essential requirements of food, clothing, cover, wellbeing, energy, and clean air, water, and soil. Substance advances improve our personal satisfaction in various ways by giving new answers for issues in wellbeing, materials, and energy use.
Here are the absolute best motivations to concentrate on science.
,Science assists you with figuring out your general surroundings. ...
,,Essential information on science assists you with perusing and
comprehend item marks.
,,,Science can assist you with pursuing informed choices. ...
,,Science is at the core of cooking. ...
,,,An order of science can assist with guarding you