V = n : M
Mr CaCl₂ : 111 g/mol
n = mole = mass : Mr
V = 15 g/111 g/mol : 2 M
V = 0.068 L
Which statement best describes how a compound is different from an element?
Answer:
An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.
Explanation:
Which characteristics describe bacteria
Answer:
5 simple characteristics of bacteria-
Single-Celled.
Absent Organelles.
Plasma Membrane.
Cell Walls.
DNA.
Explanation:
I WILL GIVE BRAINLEST PLS HELP
Phosphorus forms many oxoacids. Indicate the oxidation number of phosphorus in each of the following acids:
(a) HPO3, (b) H3PO2, (c) H3PO3, (d) H3PO4, (e) H4P2O7, (f) H5P3O10.
Answer:I need it
Explanation: I have the same quision in my chemistry exam but i dont have the answer
After performing an experiment in the lab, Michelle finds that she has produced 15.6 g of compound. She calculated that the theoretical yield of her reaction was 17 g. What percent yield did Michelle achieve?
a) 109%
b) 91.8%
c) 8.2%
d) 0.918%
Answer:
b
Explanation:
percentage yield = mass of what is produced ÷ theoretical yield x 100
percentage yield = 15.6÷17=0.9176470588235
x 100 = 91.76
this rounds to 91.8%, so the answer is b. :)
What is carbon made up of?
Carbon atoms is made up of a nucleus of neutrons and six protons which is surrounded by six electrons.
What is Carbon?This refers to a chemical element which has an atomic number of 6 and is denoted as C. It is the major constituent of all organic substances which are present in nature.
Examples include carbohydrate, hydrocarbons etc and usually acts as the central atom in reactions.
It is made up of neutrons, six protons and six electrons thereby making it the most appropriate choice.
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SOMEONE HELP ME PLEASE
Convert the answer from above to Kelvin
Answer:
313.15K
Explanation:
According to the Celsius to Kelvin formula, by adding 273.15, the temperature in Celsius can be converted to the temperature in Kelvin. Thus, 0°C = 0 + 273.15 = 273.15 K.
so to convert 40°c to kelvin
40+273.15
= 313.15K
If I have 8.5 moles of gas at a temperature of 83 °C, and a volume of 100.0 liters, what is the pressure of the gas?
Answer:
1.18 atm
Explanation:
We need to use the Ideal Gal Law for this question:
PV = nRT, where P is the pressure, V the volume, n the moles, R the gas constant, and T the temperature in Kelvins.
I'll choose a gas constant that has units compatible with the given conditions:
R = 0.08206 (L*atm)/(K*mol)
P = (8.5 moles)*(0.08206 (L*atm)/(K*mol))*(365.1K)
Make sure all the units cancel except atmospheres.
P = 1.18 atm
What is the iupac name of the oxyacid formed from chlorite?.
The IUPAC name of the oxyacid formed from chlorite is chlorous acid.
All oxyacids have the acidic hydrogen bound to an oxygen atom, so bond strength (length) is not a factor, as it is with binary nonmetal hydrides. Rather, the electronegativity of the central atom and the number of oxygen atoms determine oxyacid acidity. For oxyacids with the same central atom, acid strength increases with the number of oxygen atoms attached to it. With the same number of oxygen atoms attached to it, acid strength increases with increasing electronegativity of the central atom.
Compared to the salts of their deprotonated forms (a class of compounds known as the oxyanions), oxyacids are generally less stable, and many of them only exist formally as hypothetical species, or only exist in solution and cannot be isolated in pure form.
Thus, the IUPAC name of the oxyacid formed from chlorite is chlorous acid.
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In the Rutherford nuclear-atom model, ________.
A)the heavy subatomic particles, protons and neutrons, reside in the nucleus
B)the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass
C)the light subatomic particles, protons and neutrons, reside in the nucleus
D)mass is spread essentially uniformly throughout the atom
determine the cation of each?
HURRY!!!
Answer:
Potassium (K)
Strontium (Sr)
Magnesium (Mg)
Explanation:
The cation in Potassium Chloride (KCl) is Potassium (K) because of Potassium’s placement on the periodic table it has a charge of +1 while Chlorine has a charge of -1, making it the anion with a 1:1 ratio.
The cation in Strontium Chloride (SrCl2) is Stronitum (Sr) because of Strontium’s placement on the periodic table it has a charge of +2 while Chlorine has a charge of -1, making it the anion but since there are two Chlorines present in the formula, a 1:2 ratio.
The cation in Magnesium Chloride (MgCl2) is Magnesium (Mg) because of Magnesium’s placement on the periodic table it has a charge of +2 while Chlorine has a charge of -1, making it the anion but since there are two Chlorines present in the formula, a 1:2 ratio.
hope this helps :)
Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess Group of answer choices the ability to be synthesized in the laboratory as well as be found in nature. metallic elements, such as iron, calcium, or magnesium. metallic luster. a fixed crystalline structure (spatial arrangement of atoms and ions).
They must also possess a fixed crystalline structure (spatial arrangement of atoms and ions).
Structure of mineralsMinerals are those naturally occurring substances that are required for proper growth of living organisms.
It is found both on earth and in food substances such as calcium, magnesium, iron.
Minerals are known to have spatial arrangement of atoms and ions. Which means the ions and atoms are not randomly arranged.
Therefore, minerals are all naturally occurring solid substances with a definable chemical composition because it possess a fixed crystalline structure.
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Fill the chart below (23.46.haploid,diploid,gametes, body cells, reproduction, growth/healing”
Answer:
A. Gametes are formed by meiosis and are haploid, while body cells are formed by mitosis and are diploid.
Explanation:
Meiosis is a type of cell division that produces four haploid daughter cells (gametes) from one cell, while mitosis produces two diploid daughter cells (i.e., somatic cells). In both cases, the DNA is replicated during interphase of the cell cycle
Yeast contribute to beer brewing by producing ________ during alcohol fermentation. ethanol ethanol methanol methanol oxygen
Yeast is a substance which contributes to beer brewing by producing ethanol during alcohol fermentation.
What is Fermentation?This a process in which carbohydrate is converted into an acid or alcohol. A common fungus used by brewing companies in fermentation processes is referred to as Yeast.
It converts Sugar to the following products:
ethanol, CO2HeatRead more about Fermentation here https://brainly.com/question/546578
If lava from volcanoes moves slowly enough that people can get away from it, why are volcanoes dangerous?
Answer:
I think this is the right answer, I researched this. I am not sure if this is the right answer.
Lava flows rarely kill people because they move slowly enough for people to get out of their way. If magma is thick and sticky, gases cannot escape easily. Pressure builds up until the gases escape violently and explode. ... Explosive volcanic eruptions can be dangerous and deadly.
Explanation:
Imagine the movement of gas particles in a closed container. According to the kinetic molecular theory, which statements below are true of the gas particles? Check all that apply. Gas particles act like tiny, solid spheres. Gas particles are in constant, random motion. Gas particles at lower temperatures move faster. Collisions are elastic, there is no energy lost as the particle hits the sides of the container. Slower moving particles collide more often and with more force with the container.
Answer:
The answers are:
1. Gas particles act like tiny, solid spheres.
2. Gas particles are in constant, random motion.
4. Collisions are elastic, there is no energy lost as the particle hits the sides of the container.
Hope this helps!
According to the Kinetic Molecular Theory, the statements that are true of the gas particles are:
Gas particles act like tiny, solid spheres.Gas particles are in constant, random motion.Collisions are elastic, there is no energy lost as the particle hits the sides of the container.What is the Kinetic Molecular Theory?The Kinetic Molecular Theory actually states that the particles of gas are in motion constantly and their collisions are perfectly elastic.
This theory is actually used to give explanations for Boyle's and Charles' laws.
According to the Kinetic Molecular Theory, the collisions of the gas are elastic and are in constant motion.
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A covalent molecule Q contains exactly 6 shared electrons. What is Q
Answer:
oxygen has six shared electrons
Covalent molecules are the group of atoms that shares a covalent bond. Ammonia is a molecule that shares three pairs or six electrons to form a covalent bond.
What are covalent bonds?Covalent bonds are the intermolecular bonds that mutually involve the sharing of electrons between the two or more atoms of the molecules. In ammonia three pairs of electrons are in a covalent bond.
In an ammonia molecule nitrogen have five electrons in its outer shells and hydrogen have one electron each. When three hydrogen shares their electrons with nitrogen to make a covalent bond the octet of the nitrogen atom is completed.
Therefore, covalent molecule Q is ammonia.
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Which environmental change is considered short term? forest fire ice age mountain building solar energy changes
Answer:
Forest fire
Explanation:
Mark me as brainliest
Environmental change that is considered short term is forest fire.
What is short term environmental change?Short-term environmental change is the environmental change that occurs quickly and affects organisms. Forest fires are an example of a short- term environmental change.
Short-term changes include changes in seasonal patterns, unseasonal rainfall, changes in the life cycle of insects and animals, and so on. Long term changes examples are melting of glaciers or a rise in levels of water bodies which may cover islands close to sea level.
El Niño and La Niña are two examples of short-term climate changes lasting one to a few years. In an El Niño, the trade winds reverse direction, as do the equatorial surface currents. This causes warm water to pool off of South America and stop upwelling. A La Niña is like normal conditions only more so.
Therefore, Environmental change that is considered short term is forest fire.
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What is the atomic number and mass number of calcium ?
Answer:
Calcium has an Atomic number of 20 and Atomic mass of 40.078 u
Hope this helps!
Explain how hormones control the menstrual cycle? ( 6 )
The menstrual cycle is regulated by hormones. Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone.
PLZ HELP ON THESE QUESTIONSSS
Answer:
wat
Explanation:
During an investigation, hair samples are taken from either the head or pubic area of a victim.
A. True
B. False
Answer:
A. True
Explanation:
it is possible to identify a hair as originating from a particular body area, the regions of the body that are primarily used in forensic comparisons are the head and pubic areas.
Forensic = the application of scientific methods and techniques to natters investigation by a court of law.
During an investigation, hair samples are taken from either the head or pubic area of a victim. This statement is true.
What is investigation ?A thorough search for facts, particularly those that are obscure or need to be sorted out in a complicated situation, is known as an investigation. An investigation's main objective is often to ascertain how or why something occurred. Investigations are frequently formal, official processes.
Establishing pertinent data to support or refute claims of fraud and corruption is the goal of an inquiry.
It takes subjective thought to develop justifiable justifications for beliefs. It is conceivably the most significant line of thought an investigator will follow. It is a way of thinking that is founded on the facts, information, and evidence the investigator has gathered throughout their inquiry.
Thus, During an investigation, hair samples are taken from either the head or pubic area of a victim.
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3. An automobile tire has a pressure of 210.0 kPa at 20.0°C. What will be the
tire pressure after diving, if the tire temperature rises to 35.0°C? (221 kPa)
Answer:
answer=217.047pa
Explanation:
we apply the Gay Lussac's law "at constant volume the pressure of a fixed mass of a gas is directly proportional to kelvin temperature"
p1/t1=p2/t2
hence we can modify the equation
p2=t2*p1/t1
=210*308/298
=217.047pa
PLEASE HELP!!!!!!!!!!!
Heat change
Q1 = 27 x 4.184 x (314-273)=4631.688 J
n H₂O = 27 g : 18 g/mol = 1.5 moles
Q2 = 1.5 x 40.7 = 61.05 J
Q3 = 27 x 2.093 x (273-263)=565.11 J
Q4 = 4631.688 + 61.05 + 565.11 = 4987.848 J
Living things need to reproduce in order to propagate the species and survive. Males and females are set up in such a way that reproduction is possible, but sometimes humans do not have the ability to reproduce. Science has advanced technologies tremendously for the past few decades that artificial reproduction is now an option.
For this performance task, research and define the 4 Artificial Reproductive Technologies. After gathering information, reflect on the following questions. Write your answers based on your research on a separate sheet of paper.
a. What are the ethical implications of these technologies?
b. Should humans be allowed the ability to artificially reproduce? What is your opinion on this and why?
c. Should these technologies not exist, what would be the impact on others should one person not be able to reproduce?
Artificial reproduction technologies enables individuals unable to conceive to be able to conceive and give birth.
Although ethical issues are raised, artificial reproduction technologies are important for people who cannot naturally conceive if the technology is used within the allowed ethics.
What are artificial reproduction technologies?Artificial reproduction technologies refers to the technologies available which enables individuals unable to conceive to be able to conceive and give birth.
Some artificial reproduction technologies includes;
in vitro fertilization (IVF)gamete intrafallopian transfer (GIFT)pronuclear stage tubal transfer (PROST)tubal embryo transfer (TET)zygote intrafallopian transfer (ZIFT).The ethical implications is that humans now can choose between which babies to be born and which are not, thereby playing God.
Though, many ethical issues arise, humans should be allowed to use this technologies in order to help those who are unable to give birth to be able to do so.
Without these technologies, it would be impossible for people who can not give birth to do so, which could cause a lot of mental and physical anxiety.
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An angle grinder is best suited for use with which material?.
In a heat engine, 700 J of heat enters the system, and the piston does 400 J of work. What is the final internal (thermal) energy of the system if the initial energy is 1200 J? 300 J 900 J 1100 J 1500 J.
The first law of thermodynamics characterises the two types of energy transfer, as heat and as thermodynamic. The final internal (thermal) energy of the system is 1,500 J.
What is internal energy?The energy present in a system itself for conducting reactions is called internal energy.
Given,
Heat entering system (Q) = 700 JWork done by the piston (W) = 400Initial energy [tex](\rm U_{1})[/tex]= 1200 JAccording to the first law of thermodynamics:
[tex]\rm Q = \Delta U + W[/tex]
Substituting values in the above equation:
[tex]\begin{aligned}\rm Q &= \rm U_{2} - U_{1} + W\\\\\rm U_{2} &= \rm Q - W + U_{1}\\\\\rm U_{2} &= 700 - 400 + 1200\\\\&= 1500 \;\rm J\end{aligned}[/tex]
Therefore, option D. 1500 J is the final energy.
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Answer: The answer would be: 1500 J
Explanation:
took the quiz
how much oxygen is typically required to complete a combustion reaction
A.Triple to Quadruple the amount listed
B. Same as the amount listed
C. Ten times amount listed
D. Double or triple the amount listed
Answer:
Mass of oxygen required = 19.5 moles × 16 g/mol = 312 g.
Explanation:
1. What type of circuit is in the diagram?
parallel circuit
series circuit
Answer:
A series circuit is defined as the circuit in which a number of resistances are connected one after the other.. In a series circuit, the flow of current follows a single path.
A parallel circuit is defined as the circuit in which a number of resistances are linked across each other in such a way that one terminal of each resistance is connected to form a junction point while the remaining end is also connected to form another point.
You havent added the diagram so i cant tell you the answer, but i added the definition of each circuit, see if that helps!
What errors or inherent limitations of the procedure used in this lab might have changed the amount of limonene you have calculated to be present in orange rind as compared to the amount that would actually be extracted in an industrial facility
In this experiment, errors may be due to the presence of impurities of the splashing of solutions used in the laboratory analysis.
What are errors in experiments?Experiments are often used by scientists to determine cause and effect relationships. These experiments are often not free from errors. These errors affect the quality of the results from the experiments.
In this experiment, errors may be due to the presence of impurities of the splashing of solutions used in the laboratory analysis.
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Calculate the number of SO2 molecules in 5.65 mol of SO2.
Answer:
[tex]3.40x10^{24}[/tex] molecules
Explanation:
[tex]\frac{5.65mol}{1} *\frac{6.02*10^{23}mlx }{1 mol}=3.4013x10^{24} mlx[/tex]
btw mlx stands for molecules and i put the answer in correct sig figs in case your teacher is like mine and wants answers in correct significant figures