Question 4
4. Organic chemistry is chemistry that studies carbon containing
substances.
True
False
Answers
Answer:
true
Explanation:
Related Questions
If you have a graduated cylinder containing 15.50 mL of water and this volume changes to 17.97 mL after a metal with a mass of 17.95 g is dropped into the graduated cylinder, then what is the density of this metal?
Answers
Answer:
Explanation:
density = mass / volume
mass = 17.95 grams
volume = 17.97 - 15.50 mL = 2.45 mL = 2.45 cc
density = 17.95 /(2.45) = 7.327 grams / cc
I'm looking at the barometer in my lab as I type this question. It says the pressure is 968 torr. What is this pressure expressed in atm
Answers
Answer:
1.27 atm.
Explanation:
The following data were obtained from the question:
Pressure (P) in torr = 968 torr
Pressure (P) in atm =...?
Thus, we can convert from torr to atm by doing the following:
Recall:
760 torr = 1 atm
Therefore,
968 torr = 968/760 = 1.27 atm
Therefore, 968 torr is equivalent to 1.27 atm.
Can anyone help me with these I’m really co fused on what to do it’s for chemistry?
Answers
Answer:
It's just asking you to rearrange to equations to get what you want, so no numbers involved it's just teaching you the basics.
Explanation:
2 C2F4 → C4F8 is 0.0410 M−1 s −1 . We start with 0.105 mol C2F4 in a 4.00-liter container, with no C4F8 initially present. What will be the concentration of C2F4 after 3.00 hours ? Answer in units of M.
Answers
Answer:
After three hours, concentration of C₂F₄ is 0.00208M
Explanation:
As the units of the rate constant of the reaction are M⁻¹s⁻¹ we can know this reaction is of second order. Its integrated law is:
[tex]\frac{1}{[A]} =\frac{1}{[A]_0} +Kt[/tex]
Where [A] and [A]₀ represents initial and final concentrations of the reactant (C₂F₄), K is rate constant (0.0410M⁻¹s⁻¹) and t is time.
3.00 hours are in seconds:
3 hours ₓ (3600 seconds / 1 hour) = 10800 seconds
Computing in the equation:
[tex]\frac{1}{[A]} =\frac{1}{[0.105mol / 4L]} +0.0410M^{-1}s^{-1}*10800s\\\frac{1}{[A]} = 480.9M^{-1}\\\[/tex]
[A] = 0.00208M
After three hours, concentration of C₂F₄ is 0.00208MWhat is science? Why do you think science is important?
Answers
Answer:
As scientist discovered that Science is the method of learning everything about the natural world.
An important role in science is to ask questions to get much more know to the topic.
Science is important to the natural world.
Science is the systematic study of the natural world through observation, experimentation, and analysis, aiming to understand its underlying principles and laws.
What is science?Science is the systematic and empirical study of the natural world and its phenomena through observation, experimentation, and the formulation of testable hypotheses. It aims to uncover the underlying principles and laws that govern the universe and provides a methodical approach to understanding, explaining, and predicting various aspects of the world around us. Science covers a wide range of disciplines, from physics and chemistry to biology, psychology, and beyond, and it plays a crucial role in advancing knowledge, technology, and society.
Science is important because it drives progress, expands knowledge, and improves lives by providing evidence-based solutions to complex problems. It fosters innovation, informs decision-making, and enhances our understanding of the universe and ourselves.
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The simplest substances on Earth are called ________.
Answers
Answer:
elements
because There's no fourmals of 2 subsances that can make up an element
Answer:
Elements
Explanation:
G.O.O.G.L.E.
Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?
Answers
Answer:
solubility
Explanation:
Solubility is the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution. The solubility of a substance fundamentally depends on the solvent used, as well as temperature and pressure.
hope it helps :)
please mark it the brainliest!
Answer:
Solubility
Explanation:
just in case
Which element has the smallest atomio radius?
Answers
Convert 0.0035 weeks into seconds.
Answers
Answer: 2116.8 seconds
Explanation:
0.0035 weeks × 7days/week × 24hrs/day × 60min/hr × 60sec/min
=2116.8 seconds
=2100 (if you are required to consider significant figures)
List of things that you’ll use in the scientific method
Answers
Explanation:
Make an observation
ask a question
form a hyposisese
make a prediction
test the prediction
use the results to fix the prediction and hypotheses
5
Select the correct answer.
Who was the main author of the Declaration of Independence?
A. James Monroe
B.
Alexander Hamilton
C.
Thomas Jefferson
D. George Washington
Vjdky
Answers
If you have a volume of 10 mL and a mass of 100kg what is the density (please explain)
Answers
Answer:
0.1 grams per millilitre
Explanation:
Explanation:
Density = Mass/Volume = 10 g/100 mL = 0.1 grams per millilitre.
0.1 grams per millilitre, The density is 10 kg/mL
What is density ?The density of a material can be defined as its mass per unit volume means it is the ratio between mass and volume, where the how much stuff an object has in a unit volume.
Density is a measurement of matter, where it shows how tightly matter is crammed together, it was discovered by the Greek scientist Archimedes
To calculate the density of an object, the mass (m) can be divided by the volume (v)
Density = Mass/Volume
The SI unit of density is kilogram per cubic meter (kg/m3) or in cgs unit of grams per cubic centimeter (g/cm3).
For example, Wood floats in water as it has lower density while anchor sinks because it has a higher density, similarly Helium balloons float because the density of the helium is lower than the density of air.
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O Math
1 point
The
Is a process that uses evidence and logic to learn about
the natural world,
O observational method
experimental method
hypothetical method
O scientific method
Answers
Answer:
D). Scientific method.
Explanation:
'Scientific research method' is described as the method of research that 'employs evidence as well as logic to learn about the natural phenomenon and world.' An observation is made at first, then sufficient data is gathered to formulate a theory or hypothesis and its validity is tested and the results are interpreted. The careful observation is logically tested and justified by testing the accuracy through appropriate evidence. It helps in reaching more authentic conclusions and hence, option D is the correct answer.
which of the following is an example of how research into the effects of a chemical has changed how it is used
Answers
Answer: Finding out that asbestos is dangerous and limiting its use in building materials
Explanation:
What is the speed of a truck that travels 120km in 1.5 hours? Give your answer in km/hr.
Answers
Explanation:
Hey, there!!
Given,
distance (s)= 120km
Time (t) = 1.5 hrs.
speed = ?
We have,
[tex]speed = \frac{s}{t} [/tex]
[tex]speed = \frac{120}{1.5} [/tex]
Therefore, the answer is 80km/hr.
Hope it helps...
Answer:
82.6 km/hr
Explanation:
hoped that helped
Q1.Write down advantages and disadvantages of Mendeleev's Periodic table? Plz Help Me I Want To Make Notes For It..........
Answers
Answer:the advantage is that he discover many element unknown that time
And the disadvantage is wrong order of atomic masses and the position of isotopes
Explanation:
Answer:
Disadvantage: the isotopes and no separate position also as they have different atomic mass but same atomic number. Since the change in atomic mass of two successive elements was not constant therefore it was difficult to predict the number of missing elements with the help of atomic number only.
It could predict the existence of other elements and could predict their properties so, as to leave space in the periodic table. It could accommodate all the sixty elements discovered at that time and could accommodate the noble gases which, where discovered later.
If you have a density of 100 kg/L and a mass of 1000 g what is the volume (please explain)
Answers
Answer: Volume = 0.01L
Explanation:
The density of a substance is given by; Density = Mass / Volume.
In this question, Mass = 1000g, Volume = ? and Density = 100 Kg/L
For the units to be uniform, we convert 1000g to Kg = 1Kg
Therefore, Volume = Mass / Density = 1Kg / 100Kg/L = 0.01L
what is the metric system of units?
Answers
Answer:
The metric system is a system of measurement that uses the meter, liter, and gram as base units of length (distance), capacity (volume), and weight (mass) respectively.
Answer:
The metric system of units are:
a) meter
b) litre
c) gram.
Explanation:
These are all system of measurements.
okay.
. Calculate percentage of nitrogen in potassium nitrate (KNO3)?
Answers
Answer:
20%of nitrogen in potassium nitrate
When testing a diode with the multimeter set on "Diode Check," a reading of 0.6 volt is obtained. This indicates that the diode being tested is a
Answers
Answer:
Rectifier
Explanation:
when The reading on a multi meter set used to test a diode shows a reading of approximately 0.6 Volt, it simply means that the diode being tested is a either a silicon diode or a rectifier.
setting the multi meter set to " Diode check" is done when one wants to check for the voltage ( forward or reverse bias ) across the diode. the current passed through the diode is between : 1-10mA. and a reading of 0.6 to 0.7 volts indicates that the diode is a rectifier or a silicon diode
A glass container has a volume of 42.122cm^3. A lead sphere of radius 2.102 cm is placed inside the glass container. How much water must be added to exactly fill the container with the lead sphere sitting at the bottom of the container?
Answers
Answer: 32.9345 cm^3
Explanation:
The volume of the water that must be added to exactly fill the container with the lead sphere sitting at the bottom of the container will be 3.222 cubic cm.
What is volume?Volume is defined as the space occupied by any solid object in the three-Dimensions. For the sphere, the radius will be the parameter to calculate the volume. For a cylindrical body, the height and the radius are required to calculate the volume.
Given that A glass container has a volume of 42.122cm³ A lead sphere of radius 2.102 cm is placed inside the glass container.
To calculate the volume of the water calculate the volume of a lead sphere and subtract it from the volume of the cylindrical container.
Volume of lead sphere = ( 4 / 3 )πr³
Volume of lead sphere = ( 4 / 3 ) x π x ( 2.102)³
Volume of lead sphere = 38.90 cubic cm
Amount of water to fill in the container:-
= ( Volume of container - Volume of the lead sphere )
= 42.122 - 38.90
= 3.222 cubic cm
Therefore, the volume of the water that can be filled in the container will be 3.22 cubic cm.
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3) 2500 pounds to Kilograms
Would this be 1,250?
Answers
Answer:
1134
Explanation:
(the ones place was rounded up). 1133.981 is the unrounded answer.
Ca:
alkali metal
alkaline earth metal
The answer is alkaline earth metal!
Answers
Answer:
alkaline earth metal
it's because calcium in the periodic table is located in group 2
I) Do both the cyclists start at the same point? If not, who is ahead at the starting point? ii) At t = 7s, which cylclist is lagging behind? iii) Which cyclist – A or B would be travelling with greater speed? How can you justify?
Answers
Answer and Explanation:
Assuming the image attached is the distance/displacement-time graph of both cyclists A and B:
Cyclist B started at a position higher than 0 meters, whereas cyclist A started at 0 meters. Cyclist B started ahead.When t = 7, it s observed that cyclist A is at a higher position on the graph than cyclist B, and is therefor travelling faster. B is lagging behind.Cyclist A is travelling at a greater speed, because his distance covered is exponentially increased per time, whereas the Cyclist B only records marginal steady increase in distance covered.I hope this explanation was easy to understand and helpful.
What part of the scientific method involves controlling variables while testing a hypothesis
Answers
Answer:
Making observation
Explanation:
A theory is an attempt to explain what happens is an experiment. True or false?
Answers
10. What procedure is safest to follow when using an open flame to heat the contents
of a test tube that contains a flammable mixture?
O A. Cork the test tube and then heat it gently near the bottom only.
O D. Cork the test tube and place it in a beaker of water, then heat the water in the beaker.
C. Heat the open test tube gently near the bottom only.
O B. Place the open test tube in a beaker of water, then heat the water in the beaker.
Answers
Answer:
Cork the test tube and then heat it gently near the bottom only.
Explanation:
If the contents of the test tube is flammable, then it can catch fire easily at any time. In that case, we can not heat the mixture in an open test tube, that will make the flammable substance to catch fire easily.
In heating such a flammable material, the test tube should be securely corked and heat is delivered gently to the bottom of the tube. This will prevent the substance from bursting into flames spontaneously.
Titanium occurs naturally as the mineral rutile, TiO2. One possible method of extraction of titanium is to reduce the rutile by heating with carbon. TiO2(s) + 2C(s) Ti(s) + 2CO(g) → The standard enthalpy changes of formation of TiO2(s) and CO(g) are –940 kJ mol–1 and –110kJ mol–1 respectively. What is the standard enthalpy change of this reaction?
Answers
Answer:
The standard entalpy change for the reaction is 720 kJ/mol
Explanation:
The chemical equation for the reaction is given as follows;
TiO₂ (s) + 2C → Ti (s) + 2CO
The standard enthalpy changes of formation for TiO₂ (s) = -940 kJ/mol
The standard enthalpy changes of formation for CO (g) = -110 kJ/mol
The enthalpy change of the reaction = The enthalpy of the products - The enthalpy of the reactants
Given that there are two moles of CO, we have;
The enthalpy of the products= -110 × 2 = -220 kJ/mol
∴ The enthalpy change = -220 - (-940) = 720 kJ/mol
The standard entalpy change for the reaction = 720 kJ/mol.
a plant only requires the correct chemicals to make plant food ture or false
Answers
Answer:
Your correct answer is true.
Explanation:
A plant only requires the correct chemicals to make plant food. ( True )
Supón que se ha descubierto una nueva especie de organismo. Los científicos observan sus células en un microscopio y determinan que carecen de mitocondrias. ¿Qué tipo de respiración celular crees que cumple la nueva especie? Explica tu respuesta . Un cuerpo humano trabaja en armonía. Desde la célula hasta los sistemas, cada parte cumple una tarea que hace posible el funcionamiento del cuerpo. ¿Qué otro ejemplo puedes encontrar de trabajo en armonía en el funcionamiento de tu cuerpo?
Answers
Answer:
Respiración anaerobica
Explicación:
Las nuevas especies carecen de mitocondrias, por lo que realizan respiración anaeróbica porque en las mitocondrias solo ocurre la respiración aeróbica mientras que la respiración anaeróbica ocurre en el citoplasma de la célula. Trabajar en armonía es muy importante para el funcionamiento normal de su cuerpo. Por ejemplo, el funcionamiento combinado del sistema circulatorio y excretor. ambos sistemas hacen su trabajo mutuamente y por eso hay armonía en el cuerpo.