Answer:
Explanation:
Scientific investigations produce evidence that helps answer questions and solve problems. If the evidence cannot provide answers or solutions, it may still be useful. It may lead to new questions or problems for investigation. As more knowledge is discovered, science advances.
If a sample of 400g of ammonium chlorate is taken, how many grams of chlorine can be
extracted from the sample?
Second Question:
- When decomposed, a sample of mercury (I) carbonate yields 40 g of carbon. What is the
mass of mercury (I) carbonate, given that all carbon from the sample was extracted
without losing any mass of carbon?
PLEASE SOMEONE HELP ASAP IM BEGGING I NEED THIS TURNED IN BY 10:30!!
Answer: 120g
Explanation: 400g x 30% Cl = 120g
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
What was Ernest Rutherford's contribution to our understanding of atomic structure?
He discovered the electron.
He discovered the existence of a center to the atom.
He discovered the neutron.
He discovered the mass of the electron.
Answer:
Ernest Rutherford discovered the existence of a center of the atom.
Explanation:
Answer:
He discovered the existence of a centre to the atom
Explanation:
please mark brainliest
Why is it more convenient to wear light-colored clothing than dark-colored clothing during
hot days?
Answer:
because dark colors attract heat so if your clothes are light you won't be as hot as if you were wearing dark colors.
Answer:
bc dark colored clothing attracts heat
The mass of an unidentified rock is 40 grams. Students determine the volume of the rock by placing the rock in a cylinder with water. The students calculate the density of the rock. They determine the identity of the rock based on the density ranges in the table.
Answer:
A. Coal
Explanation:
[tex] Volume_{rock} [/tex] = water displaced by rock
Water displaced by rock = volume of water after rock is dropped into the cylinder - volume of water before the rock was dropped into the water
Water displaced by the rock = 180 ml - 150 ml = 30 ml
[tex] Volume_{rock} = 30 ml [/tex]
Density of rock:
40 grams => 30 ml
x grams => 1 ml
Cross multiply
1*40 = 30*x
40 = 30x
40/30 = 30x/30
1.3 = x
Density of rock = 1.3 g per 1 ml
Recall: 1 ml = 1 cm³
Therefore,
Density of the rock = 1.3 g/cm³
1.3 g/cm³ falls within the range of 1.1 - 1.4 g/cm³
Therefore, the rock is identified as Coal.
What property of an element does the group number identify in a numbering
system that uses "A" and "B"?
A. The number of core electrons
B. The number of inner electrons
C. The number of valence electrons
D. The electrons closest to the nucleus
Answer:
C) the number of valence electrons
Explanation:
the group shows the valence electrons in the atom
eg. Na has one valence electron hence it belongs to group(I)
the endomembrane system and the ribosome work together is called what function
Answer:
During protein synthesis, ribosomes assemble amino acids into proteins. Before we discuss the endomembrane system, it's essential to have an understanding of ribosomes. Ribosomes are the cellular structures responsible for protein synthesis
i think this might help
Explanation:
What are some different ways large or small distance can be measured?
Answer:
The method used for measuring the small distance is by using the scales and the distance measured over long distance is by inch tape or measuring tape.
Explanation:
Radar, the parallax method, and the triangulation method are used to calculate very long distances. Small distances are measured in centimeters and millimeters.
What are different ways of large or small measurement?Length is measured in distance. For instance, the length of a road equals its distance. The most popular units of measurement for distance in the metric system are millimeters, centimeters, meters, and kilometers.
The various ways that length, distance, or range can be measured are referred to as length, distance, or range measurement (ranging).
The rulers, transit-time methods, and interferometer methods based on the speed of light are the methods that are most frequently used.
Calipers and micrometers are used for making small, accurate measurements.
Therefore, different ways large or small distance can be measured.
Learn more about measure here:
https://brainly.com/question/28500284
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How many feet are in 3.2 miles
Answer:
16896
Explanation:
5280*3.2=16896
Answer:
The answer is 16896 feet.Explanation:
1 mile = 5280 feetor, 3.2 miles = 3.2 × 5280 feet =16896 feet. Therefore, the answer is 16896 feet. If you like this answer then mark this answer as BRAINLIEST answer.Thank you ☺️☺️
For ___, 2 lobes have positive signs while the other 2 have negative signs, showing that the opposite lobes of have same sign.
Answer:d orbitals
Explanation: just trustme
Orbitals are defined as the mathematical function used to identify the probability of an electron of an atom in a specific region. The orbitals are s, p, d, and f.
The correct statement for the given blank is:
For d orbitals, 2 lobes have positive signs while the other 2 have negative signs, showing that the opposite lobes have the same sign.
D-orbitals have 5 lobes, in which two lobes have positive signs and 2 lobes have negative signs.
The orbitals have positive and negative signs, as they represent the positive displacement of the wave, whereas negative displacement (down) of the wave is represented by the negative sign.
Therefore, the correct answer is d-orbitals.
To know more about orbitals, refer to the following link:
https://brainly.com/question/18914648
which system of the human body has a function similar to that of a vacuole inside a cell
Answer:
The stomach.
Explanation:
The vacuole is like the stomach because it stores food and water for later use. This allows the body and or cell to get energy when needed.
Nuclear symbol notation for hydrogen-1
Answer:
1H, 2H, and 3H.
Explanation:
is C2S6 ionic or covalent
Answer:
Ionic
Explanation:
I heard this somewhere
What do you think or know about atoms?
Answer:
atoms I personally think and somewhat know that they are what mostly makes up everything and everyone but an interesting fact scientists say atoms can not touch
As particles in a convection current are heated up, what happens to their speed and density?
A.) Particles speed up and get closer together, making their more dense.
B.) Particles speed up and spread out, making them less dense.
C.) Particles slow down and spread out, making them less dense.
D.) Particles slow down and get closer together, making them less dense.
Answer:
As they rise, they transfer their thermal energy to other particles of the fluid and cool off in the process. With less energy, the particles move more slowly, have fewer collisions, and move closer together. This increases their density, so they sink back down through the fluid
Explanation:
what do you have to do before you preform your experiment?
a. the experiment
b. analyze data
c. form hypothesis
Answer:
form hypothesis
Explanation:
Which is the best way to determine if an object is made of pure gold?
Answer:
Acid?
Explanation:
What sort of reaction would feel warm to the person holdi
This is how zirconium appears in the periodic table.
A purple box has Z r at the center and 40 above. Below it says zirconium and below that 91.22.
Rounded to the nearest whole number, how many electrons are in an atom of zirconium?
40
51
91
131
Answer:
40
Explanation:
I got a 100 on my quiz edg 2020 :)
Answer:
the answer is 40
Explanation:
i took the quiz
How many scientific methods are there?
Answer:
h
Explanation:
Answer:
I think its 8!
Explanation:
please tell me if I'm wrong :<
1. the ball has no energy
2. it has both potential and kinetic energy
3. all of the ball's energy is kinetic
4. all of the ball's energy is potential
Answer:
2
Explanation:
It is going through the air and is moving so that means that it has kinetic energy. But it is also going to go the down, which gives it potential energy.
Read the water level with the correct number of significant figures.
1) 5 mL
2) 5.3 mL
3) 5.32 mL
4) 5.320 mL
5) 5.3200 mL
Answer:
the answereis is 5 ml
Explanation:
hope thhis helped.
What do you think is the most important element and why? Include information
on its position on the Periodic Table in your response,
80 word count
Answer:
Hydrogen
Explanation:
It is considered a special element due to its flexibility in giving up & taking in electrons, therefore making it good for organic & inorganic chemistry. Hydrogen has only one proton and one electron and is the only element which has no neutrons. it is considered as the simplest element in the universe and gives a valid reason for it to be the most abundant and common element in the universe.
Hoped this helped! If this doesn't fit your 80 word count, you could shorten it.
Which of the following values are not equal to 1 mole?
12.0 g of Carbon
12.0 g of Carbon
16.0 g of Oxygen
16.0 g of Oxygen
1.0 g of Hydrogen
1.0 g of Hydrogen
20.0 g of Nitrogen
Answer:
none of them are equal to one mole
What is a limitation of using a chemical formula, such as CGH1206, to represent a compound?
The chemical formula does not show the types of elements that make up the compound
The chemical formula does not show how the atoms are connected to one another.
O The chemical formula does not show the number of atoms of each element in a molecule
The chemical formula does not show the chemical symbols of the elements in the compound.
Answer:
The chemical formula does not show how the atoms are connected to one another.
Explanation:
With a chemical formula, you can see the types of elements that make up the compound, the number of atoms of each element in a molecule, and the chemical symbols of the elements in the compound.
what is an emission spectra
J.J. Thomson discovered what part of the atom using a cathode ray tube (CRT?
What is 13.48 cm + 7.6 cm, rounded to the correct number of
significant figures?
Electrons don't go around the nucleus in nice
little round circular paths, but are found in
regions called
Answer:
Orbitals
Explanation:
An orbital is a region in space where there is a high probability of finding an electron. An orbital is a probability function put forward by the wave mechanical model of the atom.
The wave mechanical model derives its principles from the Heisenberg uncertainty principle and the principle of wave particle duality.
Since we can not describe the momentum or position of the electron at any time with certainty, an orbital is a probability function that describes the region in space where the electron may be found around the nucleus.
Pick the odd one out from the following.
Milk, Butter, Smoke , Carbon dioxide
1.Milk
2.Carbon dioxide
3. Smoke
4.Butter
plz answered fast
Answer:
Smoke
Explanation:
All of those listed are under the group of matter, except for smoke, making it the odd one one.
The rough definition of matter means that it occupies space, but smoke does not.
There are 3 main groups, Solid, Liquid and Gas.
Milk is classified under liquid.
Carbon Dioxide is classified under gas.
Butter is classified under solid.
Since you cannot classify smoke under any of the 3 categories, it is the odd one out.
What are four ways to measure matter?
Weight, matter, density, volume
Density, atoms, viscosity, hight
Weight, mass, volume, density
Nucleus, neutron, electron, positive
Answer:
C
The answer is C pleaaaaaaase