Answer:
Protons are the atomic number and for each element they never change.
Electrons are equal to the atomic number unless it is an Ion (Positive charge means it has less negative means it has more)
Mass number is Protons+Nuetrons
Explanation:
Is the substance in the chart a metal or non metal? Explain.
Answer:
Nonmetal
Explanation:
A substance in the chart is a nonmetal because nonmetals are not water soluble, they are poor conductors of heat and electricity and they do not have high melting points like metals.
______________- the layers of soil. More mature (older) soils have more of these layers
fill in the blank please
I am not sure why your teacher isn't asking for the layers, but here is the list of layers;
A -(topsoil) Mostly minerals from parent material with organic matter incorporated. A good material for plants and other organisms to live.
E - (eluviated) - Leached of clay, minerals, and organic matter, leaving a concentration of sand and silt particles of quartz or other resistant materials – missing in some soils but often found in older soils and forest soils.
B - (subsoil) Rich in minerals that leached (moved down) from the A or E horizons and accumulated here.
C - (parent material) The deposit at Earth’s surface from which the soil developed.
R - (bedrock) A mass of rock such as granite, basalt, quartzite, limestone or sandstone that forms the parent material for some soils – if the bedrock is close enough to the surface to weather. This is not soil and is located under the C horizon.
Which prefix is the smallest?
Answer:could it be kilo
Explanation:it looks like it has the least letters
Worth 40 Points❤ 10th grade chemistry
Answer:
FEGACBDExplanation:
Those are the answers in order, BUT the Goldstein and Rutherford ones are confusing me because Rutherford discovered protons and the nuclear atom. Through my research I also noticed that Goldstein contributed to the discovery of the protons made Rutherford, so I listed him as the one who discovered the proton.
I hope this helps! Have a wonderful night! :D
What is true of a gas
Answer:
did you have options, cause if you did chose something alond the lines of
Explanation:
A real gas is a gas that does not behave as an ideal gas due to interactions between gas molecules. A real gas is also known as a nonideal gas because the behavior of a real gas in only approximated by the ideal gas law.
An organism can occupy more than one niche in an ecosystem
A) True
B) False
Answer T
Explanation:
mass in grams of 3.32 mol k
Answer:
129.8 grams
Explanation:
Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry
You multiply mols x Molecular weight.
So
3.32x 39.1= 129.8 grams
Marcel conducts an experiment to test which stain remover works best on mustard stains. He wants to make sure that he does not make mistakes and has correct data in his experiment. What should Marcel do to make sure that his data are correct? conduct a similar experiment with a different washing machine ask other students to conduct related experiments at their homes ask his sibling to conduct the same experiment using his washing machine repeat the experiment several times with the same variable and constants
Answer: Repeat the experiment several times with the same variable and constants.
Explanation: The experimental procedure should be performed many times so as to determine the effect of the stain remover on mustard stain in different conditions and while using different variables such as water and type of machine used. This will tell how useful the stain remover in all conditions provided to check the accuracy of the stain remover.
Hope this help!!! :)
Answer:
C
Explanation:
if his brother does the expire end it is replication if he was to do the same expirement with the same variables then the same outcome would come out
Match each type of mass movement to its description.
the rapid downhill flow of a mixture of rock,
soil, and water
slump
mudflow
the slow downhill movement of rock and soil
creep
the rapid downhill movement of a mass of
rock, debris, or soil
landslide
a loosely connected mass of rock and soil
that moves a short distance
Answer: np
Explanation:
Correctly matched are :
landside - rapid movement of rock, debris, and soil. mudflow - mixture of rocks, soil, water. slump - loosely mass of rocks and soil.What is a landslide?A landslide is also called a land slip. It refers to several forms of mass wasting and may include a wide range of ground movements. They occur in a variety of environments characterize by gentle and steep slope gradients.
The mudflow is a mixture of rocks and soil along with water. While a creep is a slow downloads movement of rocks and soil.
Find out more information about the mass movement.
brainly.com/question/6068732
What is the order of complexity of solids from least to greatest?
Explanation:
The solids can be classified on the basis of bond they are joined with. There are four types of solids on the basis of bond. There are four type of crystalline solids: namely, molecular solids, network solids, ionic solids, and metallic solids. The molecular and the structure of the solid determines its properties likes conductivity, solibility, heat conductivity, and density. Solids are incompressible and rigid as there molecules are fixed in place.
Answer:
Atoms, Molecules, Extended Structures, and Substances
Explanation:
High arky of solids
The name for the ionic compound CoHPO4
Answer:
Dicalcium phosphate. (I'm sure meant for the "o" to be an "a" for Calcium).
Explanation:
I hope this helps! :D Have a nice night!
Can one mole of peas fit inside your house? List the materials and steps of an experiment that answers the
question without actually filling up your house with peas!
Answer:
No.
Explanation:
No, one mole of peas do not fit inside a house because one mole is equals to 6.022 × 10²³ units which is a very large value. mole only use for atoms, ions and molecules etc due to very small size but mole is not used for big sized materials such as peas and other vegetables etc. So that's why we can conclude that one mole of peas did not fit inside a house.
Why is it so important to use more than just fossil fuels for our energy sources?
Answer:
Fossil fuels are non-renewable which means that they wont last forever and they contribute largely to unnatural climate change.
Explanation:
What is the difference between heat of formation and heat of reaction? Give examples and units
Answer:
The main difference between the heat of formation and heat of reaction is that heat of formation is the amount of energy either absorbed or released during the formation of a compound whereas heat of reaction is the amount of energy either absorbed or released during any chemical reaction.
Write the names of the following covalent compounds: no2
Answer:
nitrogen dioxide
Explanation:
this was on my chemistry test
Explain why, in a balanced chemical equation C + O2 CO2, we know that 1 gram of C will not react exactly with 1 gram of O2.
Answer:
See the answer below
Explanation:
From the equation, 1 mole of C requires 1 mole of O2 for a balanced reaction.
1 g of C will not exactly react with 1 g of O2 because the 1 g of each of the reactants contain different amounts of the substance.
The amount (in moles) of a substance is the mass of that substance divided by the molar mass.
Hence, 1 g of C will contain 1/12 moles of the substance while 1 g of O2 will contain 1/32 moles of the substance.
pls this is my second time asking these questions, i'm sorry, but i really need help!!! 1. what happens to atoms when there is a chemical reaction? 2. what are the rules that have to be followed for atoms? 3. what do these rules mean for chemical reactions? sorry, chemistry isn’t really my best subject lol
Answer:
the atoms of the original substances gain, lose and even share their very own electrons. write the symbols of the elements that form the compound. Write down the valency, and lastly go over valencies. This is all I got so far. I hope this helps
Explanation:
2. What is the mass of 5.3 moles of CaCl2?
Answer:
590 g CaCl₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
5.3 mol CaCl₂
Step 2: Identify Conversions
Molar Mass of Ca - 40.08 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of CaCl₂ - 40.08 + 2(35.45) = 110.98 g/mol
Step 3: Convert
[tex]5.3 \ mol \ CaCl_2(\frac{110.98 \ g \ CaCl_2}{1 \ mol \ CaCl_2} )[/tex] = 588.194 g CaCl₂
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
588.194 g CaCl₂ ≈ 590 g CaCl₂
1-calculate the mass of 4 moles of Na
2-what is the mass of 0.3 moles of water H2o H:1 O:16
3-compute the number of moles found in 10g of ethanol C2H5OH C:12 O:16
please help me as fast you can
1. 92 g
2. 5.4 g
3. 0.217 moles
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
[tex]\tt n=\dfrac{m}{MW}[/tex]
1. the mass of 4 moles of Na(MW= 23 g/mol)
[tex]\tt mass=mol\times MW\\\\mass=4\times 23\\\\mass=92~g[/tex]
2. the mass of 0.3 moles of water(MW=18 g/mol)
[tex]\tt mass=mol\times MW\\\\mass=0.3\times 18\\\\mass=5.4~g[/tex]
3. the number of moles found in 10g of ethanol C2H5OH(MW=46 g/mol) :
[tex]\tt mol=\dfrac{10}{46}\\\\mol=0.217[/tex]
A pH of 1 there are a lot of ______ in a solution. 2.A pH of 14 there are a lot of ______ in a solution.
Answer:
Hydrogen or hydroxonium ions in the solution
Hydroxyl ions in the solution
Explanation:
A pH of 1 shows there is a lot of hydroxonium ions in the solution and a pH of 14 shows there is a lot of hydroxyl ions in the solution.
The pH scale ranges from 1 to 14 As the values tends towards 1, the acidity increases due to concentration of hydroxonium ions in the solution. As the pH tends towards 14, the basicity increases due to the concentration of hydrogen ions in the solution.In a solid, the particles..
A. Vibrate in place
B. Overcome the strong attraction
C. Slide past one another
D. Move freely
halogenation of propane
Answer:
The halogenation of propane discloses an interesting feature of these reactions. All the hydrogens in a complex alkane do not exhibit equal reactivity. For example, propane has eight hydrogens, six of them being structurally equivalent primary, and the other two being secondary
in 2 hours a bicyclist traveled 75 kilometers. What was the bicyclist's average speed?
Answer:
37.5 miles per hour....
If a 200 kg person stands next to a 100 kg person. Which person would have a larger gravitational attraction?
Answer:
200 kg
Explanation:
the 200 kg person is heavier due to gravity's force the 100 kg person has less force than the other person
Answer:
massive one that is 200kg
Explanation:
Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.
Write one equation each for the decomposition reactions where energy is supplied in the form of (a) electricity and
Answer:
Electrolysis of water
Explanation:
The electrolysis of water is a decomposition reaction in which electricity is used to break down a compound into simpler molecules.
Decomposition of water is carried out in the Hofman Voltameter.
This process is achieved by passing current through an acidified water.
The expression is given as:
2H₂O → 2H₂ + O₂
calculate the percentage of iron in iron (III) sulphate
Answer:
28.01 percent
Explanation:
Iron (III) sulphate, [tex]Fe_2(SO_4)_3[/tex], has 2 atoms of Fe.
One atom of Fe has a molar weight of 56. Hence, 2 atoms of Fe would have a total molar weight of 56 x 2 = 112 g/mol
Molar weight of [tex]Fe_2(SO_4)_3[/tex] = 399.88 g/mol
Percentage Fe in [tex]Fe_2(SO_4)_3[/tex] = 112/399.88 x 100%
= 28.01%
The percentage of iron is iron (III) sulphate is, therefore, 28.01 percent.
2 points
Al + HCI—_AICI:
+_H2
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion
What happens when an object
returns to its original shape-does it
still have elastic energy?
Answer:
Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.
Given the reaction: 4Al + 302 --> 2AI2O3
How many moles of Aluminum oxide do you have if you have 6 moles of AI?
A
6: moles
B: 2 moles
C: 3 moles
D: 12 moles
Answer:
B: 2 moles
Explanation:
that my answer I got i think its correct
Need help with these.