The percentage of fluorine in the given compound is 49%.
The given compound;
CaF₂
The molecular mass of the given compound is calculated as follows;
CaF₂ = (40) + (19 x 2)
= 40 + 38
= 78 g/mol
The mass of fluorine in the given compound = 38 g/mol
The percentage of fluorine in the given compound is calculated as follows;
[tex]= \frac{38}{78} \times 100\%\\\\= 48.7 \%\\\\\approx 49\%[/tex]
Thus, the percentage of fluorine in the given compound is 49%.
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A neutral atom possesses an atomic number of 13 and an atomie mass of 27. Three electrons are lost.
From what region of the atom are they lost?
outside the atom
inside the nucleus
outside the nucleus
both inside and outside the nucleus
heat flows naturally from objects that have higher energy to those with?
Answer:
heat flow
Explanation:
heat flow moves to a higher temperature to a lower temperature
Which two types of waves require matter in order to travel?
О A. Light Waves
О B. Water Waves
О C. Electromagnetic Waves
О D. Sound Waves
Answer:
water waves and sound waves
What is the name of the following compound?
Al4C3
-Silver carbonate
-Aluminum carbide
-Aluminum carborhte
-Silver carbide
The Big Bang Theory is a hypothesis that states that all matter
and energy were at one time compressed into a small volume
and then _________
Answer:
I’m not sure how they want you to answer the fill in blank.
Explanation:
The Big Bang is a theory where 14 billions years ago all matter and energy in the universe was compressed into an extremely small volume that exploded and began expanding in all directions.
The big bang theory is a hypothesis that states that all matter and energy were compressed into a small volume at one time and then expanded outward.
What is Big Bang Theory?The big bang model of the universe can be described as the model to identify the beginning of the universe. The big bang model is a cosmological model which is described by the software development life cycle.
The Big Bang theory is the dominant model of the observable universe from its beginnings to large-scale evolution. This model explains how the universe is expanded from a state of high density and temperature. It provides an explanation for phenomena, such as cosmic microwave background radiation, the abundance of light elements, and large-scale structure.
Due to the big bang as we know, the universe has been created existing about 12 - 15 billion years ago. According to the theory that the Big bang was a gigantic explosion that formed all of the energy and mass in less than a second in the universe.
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Thermal energy is added to water to raise the temperature to 250F.
Which of the following models BEST describes the movement of the particles after the thermal energy is added?
Answer:A
Explanation:the water will start to boil representing the yellow particles.
Answer:
A
Explanation:
Lol I'm doing the test right now and I have notes
How many grams are in 2.2 moles of magnesium hydroxide?
128.33g
26.51g
0.04g
Answer:
128.33g
Explanation:
A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C.
Solve the problem for the pressure of oxygen.
in kPa plz
Answer:
The pressure of gas in kilopascals is 55.9
Explanation:
variables given :
volume
temperature
moles
unknown variables :
pressure
Select the correct algebraic form for the equation to be used for this calculation.
p= nRT/V
Solve the problem for the pressure of oxygen.
Answer:
55.9 kPaSelect the correct text in the passage.
Which statements in this passage about volcanoes do not contain factual errors?
The Hawaiian islands are known for their volcanic activities. In fact, the islands were formed from volcanoes. Before a volcano erupts, earthquake activity beneath the volcano decreases. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano. When a volcano erupts, the amount of carbon dioxide and sulfur dioxide emitted decreases. Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
(I couldn't find the science subject so I just put chemistry)
Answer:
The answers are
1. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano.
2. Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
Explanation:
When a volcano is near eruption Earthquake activity gets stronger and stronger. Scientists use a wide variety of techniques to monitor volcanoes, including seismographic detection of the earthquakes and tremor that almost always precede eruptions, precise measurements of ground deformation that often accompanies the rise of magma, changes in volcanic gas emissions, and changes in gravity and.
Scientists can use the FTIR or Fourier Transform Infrared Spectrometer to measure dissolved volatile concentrations as described above or can be used to measure several gases emitted from a volcano simultaneously. The device can be used both as an open-path or closed-path system. I had just taken the test and got the question right as well
The statements in this passage about volcanoes which do not contain factual errors are scientists use seismometers to measure the earthquake activity that occurs beneath a volcano.Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
What are errors?Errors in chemical analysis are defined as a result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in a decrease in accuracy, reproducibility, and precision.
There are three types of errors present:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings or observations to reduce the error.
Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental error or systematic error if there is a fault in the thermometer.
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Help!
Which of the following can scientists NOT interpret by examining fossils?
A. How earth's environment has changed overtime.
B. How plants and animals have changed overtime.
C. The age of certain layers of rocks. D. How the pull of gravity has changed.
Define balanced forces(giving Brainly)
Answer:
Explanation:
Balanced forces are opposite in direction and equal in size.
Balanced forces are in a state of equilibrium.
Answer:
Balanced forces are forces whose net amount remains zero.
This can take place when two equal forces are acting in opposite direction.
Balanced forces don't make any change in the position of objects
Can the structure of an atom be broken down into smaller parts?
Answer
yes it can because it can be split in to neutrons and electrons.
Explanation:
balance the following equations
1) 2KI + Cl2 → 2KCl I2
2) 2C2H6 + 7O2 → 4CO2 + 6H2O
3) 3Mg(NO3)2 + 2K3PO4 → Mg3(PO4)2 + 6KNO3
The thin muscular wall that separates the right side of the heart from the left side is called the
give full experimental details of how you would prepare a aluminum chloride from aluminum
Answer:
hello hello hello hello hello hello hello
Select the correct answer.
Which substance is most likely to form in a precipitation reaction?
A.
calcium nitrate
B.
copper(I) nitrate
C.
iron(I) chloride
D.
iron(II) sulfide
E.
potassium sulfate
Answer:
C.
Explanation:
Iron is most likely to form a precipitation reaction.
What was important about the Hydrogen bright line emission spectrum?
Answer:
The emission spectrum lines are the changes in the quantum energy levels of the single electron in the Hydrogen atom.
Explanation:
Electrons move around the hydrogen atom in electron waves patterns. These waves occur in distinct quantum energy levels.
The change from one quantum energy level to another energy level has a definite energy level change. There is a wave length associated with each change in energy levels. These wave lengths have a color associated with them.
Low energy level changes have long wave lengths associated with them giving red and orange colors.
High energy level changes have short wave lengths associated with them giving blue and violet colors.
Note each atom has a unique emission spectrum associated with the energy levels and electron structure of the atom. Helium was first discovered by looking at its emission spectrum as seen in the sun.
Explanation:
How are the cells produced through mitosis and meiosis different?
Answer:
In mitosis 2 identical cells are created, but in meiosis 4 sex cells are created.
Explanation:
In mitosis there are 5 stages. These stages are prophase, prometaphase, metaphase, anaphases, and telophase. In meiosis there are also 5 stages, they are the same phases, they just end with II. (Ex. Prophases II)
Your sick puppy is diagnosed with roundworms. They grow inside of the puppy. What type of symbiotic relationship do the puppy and the roundworms have?
A. Cooperative
B. Commensalism
C. Mutualism
D. parasitism
what is an example of a combustion reaction
if possible, can it come with an explanation pls
Answer:
An example of a combustion reaction is the burning wood in a fire.
Explanation:
In the combustion reaction, the carbohydrates in wood combine with oxygen to create water and carbon dioxide. This reaction is very energetic, and it generates heat and light as it releases said energy.
Hope this helps! Have a nice day! (And please mark me brainliest)
What are two things in nature that solar energy powers?
Answer: light and heat
Explanation:Our sun is the source of all life on Earth, and solar energy is useful to us in many different ways. The sun creates two main types of energy - light and heat - that we can harness for many activities ranging from photosynthesis in plants to creating electricity with photovoltaic (PV) cells to heating water and food.
A reaction yields 6.25 grams of a product. What is the percent yield if the theoretical yield is 18.8 grams?
Answer:
Ans. 33.2%
Explanation:
Teacher Told me
Which organelle is found in both prokaryotes and eukaryotes?
a. Mitochondria b. Ribosomes c. Cell
Answer: It would be ribosomes..
Explanation:
What will happen to an object
that is more dense than the fluid
it is in?
A. It will sink.
B. It will float.
C. It will rise to the surface.
D. It will bounce out of the water.
Answer:
A
Explanation:
For Connexus/Edge
advantages of artificial fertilizers?
Answer:
they improve soil texture
Explanation:
that's it helps to hold
water longer and and increase the soil bacteria and fungal activity in the soil so they do not only assist your plants , they help the soil.
If a Maritime Tropical Air mass begins in the Southern United States and keeps traveling North directly over the central USA, will it remain a Maritime Tropical air mass? Why?
Answer:
If a Maritime Tropical Air mass begins in the Southern United States and keeps traveling North directly over the central USA, it will turn into a polar air mass.
Explanation:
because Northern USA is colder than the South :)
Can somebody sort these from non-metals to metals?
Sonorous, low melting point, high density, brittle, dull, malleable, basic oxide
please help me on this question
Answer:
B
Explanation:
That seem the most locigal to me
10pts! Will give brainllest if you are right! Please come quicklyyyy!
How are speed and velocity related?
A. they're exactly the same
B. velocity = speed and direction
C. speed = velocity and direction
D. direction = speed and velocity
Answer:
Hey there :))
Speed and Velocity are related in a lot of ways distance and displacement are. Speed is a scalar and velocity is a vector. They both represent a way to measure the change in position of an object relative to time.
How do ionic bonds form between atoms?