Answer:
A!!! is the answer hope this helps!!!!
Answer: the answer is A
Explanation:
A soil:rocks
Explain the importance of valence electrons in chemical bonding.
Answer:
Explanation: Understanding valence electrons is key to understanding chemical bonding. Delocalized valence electrons produce metallic bonds (bonds between atoms of metals) which give metals unique properties such as conductivity and ductility (draw metal into wires)
1 You place a 28.95-g piece of gold in a 10-ml graduated cylinder. The level of the water rises 1.50 mL. What is the density of gold?
Answer:
What mass of silver will raise the level of the water in the graduated cylinder 1.50 mL? (Ans) 28.95 g / 1.50 mL = 19.3 g/mL (The gold's density)
19.3 gm/ml³ is the density of gold .
What do you mean by the density of the substance?Density, mass of a unit volume of a material substance. Density of a substance tells how close the particles of a substance are packed.
The formula for density is D = M/V, where d is density, M is mass, and V is volume.
Density is commonly expressed in units of grams per cubic centimeter.
The SI unit of density is kilogram per cubic meter (kg/m3).
It is also represented in the c g s unit of grams per cubic centimeter (g/cm3).
To calculate density of gold (here):
Given,
Mass of gold=28.95 gm
Volume of water=1.50 mL
Density=?
Density =Mass/Volume
Density=28.95/1.50
Density=19.3 gm/ml³
Hence, 19.3 gm/ml³ is the density of gold .
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calculate the number of moles
for 66 gram of CO2
Answer:
1.55
Explanation:
The number of moles = given mass / molar mass
The given mass is 66 g and the molar mass is 44 g/molar mass
Substituting the values in, we get that:
the number of moles = 66/44
the number of moles = 1.55
hope this helped!
1-Are natural resources renewable or nonrenewable?
2-what is the only way to stop the depletion of natural resources?
3-What is an example of poor soil management?
Answer:
1- Natural sources are renewable with time
2- To refrain from over usage of products on unnecessary things
3- An example of poor soil management is using the soil with the most minerals to put houses on instead of farming with
4) How does an atom have a charge of -3?
Answer:
When the electrons hit the atoms in the chamber, they cause some of the electrons in the atoms to be stripped or knocked away. ... When one or more electrons is knocked off of an atom, it becomes positively charged. It is now an positive ion. A negative ion can be made by adding an electron to an atom.
Explanation:
Which of the following describes a species with the greatest fitness?
The species that can reproduce beter than the others
The species that is faster than the others
The species that is stronger than the others
The species that is larger than the others
Answer:
C is it!
Explanation:
If KI K I has a solubility of 140. G g in 100. G g of H2O H 2 O at 20 ∘C ∘ C , how many grams of water are needed to prepare a saturated solution containing 75.0 g g of KI K I ?
Answer:
53.6g of water are needed
Explanation:
Solubility is the maximum amount that a solvent can dissolve of a particular solute.
100g of Water can dissolve 140g of KI.
That is also the definition of a satured solution: A solution that is dissolved in the maximum amount in a particular amount of solvent.
If there are dissolved 75.0g of KI, the amount of water needed are:
75g KI * (100g water / 140g KI) =
53.6g of water are neededplease only do the ones I didn't do I will give brainiest
Heat transfer has to do with the movement of heat from one point to another.
What is heat transfer?The term heat transfer has to do with the movement of heat from one point to another. There are three modes of heat transfer and these are;
1 Conduction
2 Convection
3 Radiation
Now, we shall try to establish the modes of heat transfer here;
1) The oven get warmer while transporting a hot baking dish - conduction
2) Maslow heats over fire - Radiation
3) The sun causes water in the pond to evaporate - Convection
4) Hot air inflates a balloon - conduction
5) Heat from the air is absorbed by ice cubes - conduction
6) A hot horseshoe transfers heat to tongs - conduction
7) A pot sitting on a hot burner - conduction
8) A bowl of cereal cools - convection
9) Water is warmed over fire - conduction
10) spoon gets warmer after sitting over a bowl of soup - Conduction
11) A microwave heats food - Radiation
12) An infrared sensor detects body heat - radiation
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What makes the element oxygen different from the element hydrogen?
Answer: the difference is due to the fact that one water molecule has two hydrogen atoms to one oxygen this means it takes two water molecules (2 H2O) to make one oxygen molecule (02) .At the same time however two molecules of water (2 H20) can make two molecules of hydrogen (2 H20)
Explanation: hope this helped and mark me as brainliest please =)
Who knows the answer to this please help
10. A gas sample that has a mass of 6g occupies 400 mL at 504°C and a pressure of 600 mm Hg. Calculate the gas’s density at STP.
Answer:
51 g/mol
Explanation:
Whenever you see molar masses in gas law questions, more often than not density will be involved. This question is no different. To solve this, however, we will first need to play with the combined ideal gas equation PV=nRT to make it work for density and molar mass. The derivation is simple but for the sake of time and space, I will skip it. Hence, just take my word for it that you will end up with the equation:
Which is the last section of the digestive system?
small intestine
liver
large intestine
rectum
The last section of the digestive system is the rectum.
What is digestive system?Digestive system is the system of the body that comprises of organs,enzymes that help to break down large molecules of food into smaller mole yles which is easily absorbed by the body.
Therefore, The last section of the digestive system is the rectum.
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Answer:
r3ctum
Explanation:
for people on edge.
I need help with this one please it’s science
Answer: A change in appearance. (Please say thanks!)
Explanation:
The biggest sign of a chemical change is change in appearance.
Answer:
d
Explanation:
This is a science question. What is the acceleration of the dragster?
Answer:
8.89m/s^2
Explanation:
The question is asking what rate the dragster is accellerating. In science, acceleration is a change in velocity (speed) and direction. So, the speed decreases 40 m/s. It does this in 4.5 seconds. That's 40m/4.5 seconds. So, when you simplify that, it's 8.999999...m/s.
Harry dissolved 9.36 g sample of LiOH into water in a calorimeter. The temperature of the calorimeter rose from 36.9 degrees Celsius to 52.8 degrees Celsius. The heat capacity of the calorimeter and its contents is 639 J/ degC. What is the enthalpy for the solution process if Harry repeats the lab again and 2.85 mol of the LiOH was dissolved? Given: the molar mass of LiOH is 23.95 g/mol
Answer:
did u get the answer?
Explanation:
The half-life of carbon-14 is about ____________ years.
Fill in the blank.
Answer:
5730 years
Explanation: for more on radiocarbon dating.) and hence explain why the amount of carbon-14 in the sample decays by half over any period of 5730 years.
If a star has a higher apparent magnitude, what does that mean? A low apparent magnitude?
Atoms that gain
an electrons
have a _____
Charge?
Answer:
positive
Explanation:
How does the shape of a molecule affect its function?
titt
A. The shape of a molécule determines its molecular weight.
B. The shape of a molecule determines its properties and
interactions
C. The shape of a molecule determines how gravity affects it.
D. The shape of a molecule determines what kinds of atoms it
contains
Answer:
Letter B
Explanation:
The shape of the molecule affects its function as it determines it's properties and interactions.
What are molecular shapes?Molecular shapes or more precisely geometry of molecules is a three dimensional arrangement by which atoms and chemical bonds are present in a molecule .Molecular shapes affects many properties of a molecule like it's color, reactivity and action.
The molecular shapes are important as they play a vital role in determining macroscopic properties like melting and boiling points. It also helps in prediction of the way by which the molecule reacts with the other molecule.
It majorly affects physical and chemical properties of compounds .The shape of the molecule is mostly determined by the repulsion caused among valence electrons which is stated by valence shell electron pair repulsion theory.
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.Which statement about transition elements is correct?A Their soluble salts usually form coloured aqueous solutions. B They are all in the same group of the Periodic Table. C They are non-metals with high melting points. D They can be mixed together to form compounds
Answer:
A Their soluble salts usually form coloured aqueous solutions
The concept of continental drift was developed by Alfred Wegener. Which of the following pieces of evidence does NOT support Wegener's hypothesis?
Fossils of the same organisms are found on different continents.
Similar glacial sediments are found in different parts of the world.
The shapes of the continents fit together like pieces of a jigsaw puzzle
Climates at different latitudes are similar to one another.
Answer:
Climates at different latitudes are similar to one another.
Explanation:
I believe it is D.
Can I have brainliest
The concept of continental drift was developed by Alfred Wegener. Climates at different latitudes are similar to one another does not support Wegener's hypothesis. Therefore, option D is correct.
What is wegener's hypothesis ?Wagner's law, commonly referred to as the law of growing state activity, states that public spending rises as GDP does. Adolph Wagner (1835–1917), a German economist, is credited with discovering it first in his own nation before noticing it in other nations.
On January 6, 1912, Alfred Wegener initially presented his theory to the German Geological Society. According to his theory, the continents were formerly part of a single landmass known as Pangaea before disintegrating and migrating to their current places.
However, Wegener's hypothesis lacked a geological explanation for how the continents might have moved as he predicted over the surface of the globe.
Thus, option D is correct.
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Everyone has a laughing place, The trouble is most people don't take the time to look for it.
true
or
false
Answer:
True
Explanation:
Answer:
True
Explanation:
Most people stick to what they know and don't look for a laughing place.
How do the products of chemical reactions compare to their reactants?
Question 5 options:
The products often have completely different properties than the reactants.
The products usually weigh more than the reactants.
The products usually have more atoms than the reactants.
The products are usually more toxic than the reactants.
Answer: The products usually weigh more than the reactants.
Explanation:
Answer:
A
Explanation:
i just took the k12 test
What does it mean when an element has no subscript in a chemical formula?
Answer:
the element has no subscript because it is only one atom of it
Explanation:
If there isn't a subscript, it's presumed that there is only one atom of that element present.
What is subscript?Subscript is defined as a character that is printed slightly below and to the side of another character, commonly a letter or a number. A subscript is a character that is printed slightly below and to the side of another character, commonly a letter or a number. Chemists frequently employ subscripts in their formulations.
There is no number written if there is just one atom. The number is given as a subscript after the atom if there are multiples of a particular kind of atom. The number on the right side of the symbol indicates how many atoms of that element are contained in the molecule. The atomic number of an element is shown as a subscript on the left-bottom corner of a stand-alone symbol.
Thus, if there isn't a subscript, it's presumed that there is only one atom of that element present.
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How many significant figures are present in the sum of 6.0025 + 9.1
Answer:
15.1025 I your answer okayyyyy
Where do you find the Group 1 and Group 2 metals?
Answer:
far left
Explanation:
Janet is sliding a box across the floor what does she need to know to calculate the force on a box?
Answer:
She needs to know the Mass and acceleration
Janet needs to know the mass of the box and acceleration .
What is force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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Jeremiah pushed Anthony with a net force of 12 N. Anthony accelerated across the hall at 0.2 m/s2. What was Anthony’s mass?
Answer:
6
Explanation:
Work Shown:
Force = Mass*Acceleration
F = ma
12 = m*0.2
12/0.2 = m
60 = m
m = 60 kilograms
What is the electron configuration of chlorine?
Explanation:
[Ne] 3s² 3p⁵
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Atomic number: 17
Symbol: Cl
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