Explanation:
7erhsigusiskjkurfnkldowustehwoostfsjsozdtshalsoxttensiuxdnslc icy rbkedlxt
What are two things with the same volume but different masses?
Answer:
an ice cube and paper cube with the same dimensions
Explanation:
an example is an ice cube and a cube with the same dimensions made of paper. these have the same volume, but different masses because the particles are packed differently and in different amounts.
Which is not an example of an element ?
Answer:
include all compounds.
Answer:
CO2 is a pure compound
Explanation:
Element non examples include all compounds, which are substances made when two different types of atoms form a chemical bond. Any material made by mixing elements is no longer an element. Anytime you see a chemical formula with more than one element symbol in it, it's an element non example.Pure elements are Substances which are made up of only one kind of atom. Air is a mixture of element and compound whereas alcohol in water is a mixture of compounds. CO2 is a pure compound and not an element.
I WILL GIVE YOU BRAINLIEST!!!
Refer to the Newsela article "How You Can Make a Solar Oven To Cook with a Pizza Box."
What is the author's purpose in mentioning variables in designing the solar oven?
to show how easy it is to produce solar energy
to encourage readers to vary the design
to explain how wasteful solar energy production can be
to show the author did not think too hard about the design
Answer:
Encourage readers to vary the design
Explanation:
NEED ANSWER ASAP!! I would really aprecitate it! Please.
Explanation:
Positron..............Pesticides are a type of wastewater
pollutant.
True
False
The Earth is always _______ as it revolves around the sun.
Fill in the blank
Get Brainliest if correct.
Answer
Rotating
Explanation:
The Earth is always being pulled towards the Sun by gravity.
The Earth is not moving fast enough to "escape" the Sun's gravity and leave the solar system, but it is going too fast to be pulled into the Sun. Therefore, it keeps going around and around( roating)- orbiting the Sun.
Answer:
Rotating around the sun
Based on the physical properties of elements on the periodic table, which of the
following elements will most likely act as both a conductor and insulator? *
Aluminum
O Sulfur
O Copper
Silicon
What is the name of the process that plants and animals undergo to release carbon
Please help meee!!!
Answer:
Wood
Explanation:
Because the nail is driven into the wood by the force of the hammer.
True/False The atoms of a gas are the most tightly packed of the 3 states of matter.
Answer:
false
Explanation:
because solid is the most tightly packed out of gas and liquid .
Find the average atomic mass of smithium ?
Answer:
google friend tell me
Explanation:
You will have to look up the isotopic distribution of lithium nuclei. ALL lithium nuclei have 3 positively charged nuclear particles, protons, i.e. Z = 3 . These 3 particles give rise to the element's identity. If you take the weighted average of ALL lithium nuclei, we get an average mass of 6.941 g⋅mol−1
Why are some isotopes stable and others not stable
Answer: Many elements have one or more isotopes that are radioactive. These isotopes are called radioisotopes.
Answer:
Many elements have one or more isotopes that are radioactive. The isotopes are called radioisotopes
At $2.186/gallon, how many pennies would it cost to buy 125 L of gasoline? (1 gallon =
128 oz, 1 oz= 29.6 mL)
PLS HELPPPP
Answer : The cost of pennies to buy 125 L of gasoline would be, $71.92
Explanation :
As we are given that the cost to buy gasoline is $2.186/gallon.
Now we have to determine the cost to buy 125 L of gasoline.
First we have to convert 125 L into gallon.
Conversion used:
(1 gallon = 128 oz, 1 oz= 29.6 mL, 1 mL = 0.001 L)
As, 1 L = 1000 mL
So, 125 L = 125000 mL
and,
As, 29.6 mL = 1 oz
So, 125000 mL = [tex]\frac{125000mL}{29.6mL}\times 1oz=4222.9oz[/tex]
and,
As, 128 oz = 1 gallon
So, 4222.9 oz = [tex]\frac{4222.9oz}{128oz}\times 1\text{ gallon}=32.9\text{ gallon}[/tex]
Now we have to determine the cost to buy 125 L of gasoline.
As, the cost of 1 gallon of gasoline = $2.186
So, the cost of 32.9 gallon of gasoline = $2.186 × 32.9
= $71.92
Therefore, the cost of pennies to buy 125 L of gasoline would be, $71.92
The heat required to raise the temperature of 12g of water from 16 C to 21 C is:
I don't understand how and why some transition metals form more than one ions eg: copper forms two. PLS EXPLAIN. I WILL GIVE YOU BRAINLIEST.PLS EXPLAIN PROPERLY AND IN FULL DETAIL. I AM IN YEAR 9.
THANKYOU
USE COPPER OXIDE IONS AS AN EXAMPLE.
7-8 POINTS
Answer:because some have more radiation than others causing mutations and there for either decreasing or increasing the amount of ions
copper is a acidic metal in general therefor it will most likely erode faster than any other metal making it hard to determan the number of ions in general the metal will have basicly what I’m trying to say is there is no solid answer as many metals can change there ions for no given reason
Explanation:
Except for helium, all the elements in the last column of the periodic table have
valence electrons.
0 7
0 8
О О
O 18
Answer:
O
Explanation:
they have O valence electrons
One of the main goals of environmental science is to help humans use the environment in a way that is economically profitable.
true or false
Answer:
true this is correct its your econimically
The half-life of a radioisotope
a
gets shorter with time
b
is constant
c
get shorter with increasing temperature
d
decreases by a factor of two each time
e
become longer over time
Answer:
b is constant
Explanation:
The half-life of a radioisotope is constant throughout its life cycle.
Half-life is the time taken for half of the radioactive nuclei to disintegrate.
Every radionuclide has its characteristic half-life and it is independent of the number of radioactive atoms.
The half-life does not depend on any variable. It is an inherent property of a radioactive isotope. The shorter the half-life, the faster a radionuclide decays. Nuclides with a long half life are fairly stable for a long period of time. The decay of a radioactive element is usually characterized by its half-life.Therefore, the most ideal statement about half-life is that it is constant.
How have batteries gotten better over time
Answer:
Yes they have gotten better overtime
Explanation:
what is the total charge of 20 electrons in zeka-Coulombs?
Answer:
[tex]3.2\times 10^{-18}\ C[/tex]
Explanation:
No of electrons, n = 20
We need to find the total charge. We can use quantization of electric charge in this case.
Net charge,
q = ne
e is charge on an electron
[tex]q=20\times 1.6\times 10^{-19}\\\\q=3.2\times 10^{-18}\ C[/tex]
So, there are [tex]3.2\times 10^{-18}\ C[/tex] of charge in 20 electrons.
When does the shape of a molecule affect its polarity?
A. When the molecule contains ionic bonds
B. When the molecule contains polar bonds
C. When the molecule contains hydrogen bonds
D. When the molecule contains nonpolar bonds
Answer:
B When the molecule contains polar bonds.
Explanation:
AP-EXpert
The shape of a molecule affect its polarity, when the molecule contains polar bonds because polarity depends on polar bonds.
What is the effect on polarity?The polarization of a molecule greatly depends on the shape of the molecule. The net dipole moment occurs only due to the uneven distribution of electrons between the two atoms.
So we can conclude that the shape of a molecule affect its polarity, when the molecule contains polar bonds because polarity depends on polar bonds.
Learn more about polar here: https://brainly.com/question/545359
#SPJ2
What do you do if your friends hate you ex that you secretly dating again and you promised not to date him again but you i love him?
Answer:
this is what I personally feel.
Explanation:
it depends on ex . If he is a a hole ,not trustworthy, or is a negitive person,Then yeah i understand what they are coming from. Another is that is also on your end. if you keep going back to a person that is on you . if he isnt treating you right, then listen to them !! . Youll find someone that knows your worth :) . I hope this helped . have a nice day <3
Leann is learning about chemical reactions. She wants to create a model of a chemical reaction, so she is examining the information that she should include. What are the different components that she should include in her model? Choose the three that apply.
A. the kinds of atoms that form during a reaction
B. the kinds of molecules involved in the reaction
C. the kinds of elements that make up a molecule
D. whether the molecules are products or reactants
E. whether the products have more mass than the reactants
Which surface will most likely cause a rolling ball to slow down?A.grassB.iceC.tile
Answer:
grass
Explanation:
ice and tile are smooth and without any bumps or large ridges, unlike grass which is spiky and flexible. grass will most likely slow down a ball that is rolling, unlike answer choices B and C.
Answer:
grass
Explanation:
ice and tile are bothe a flat surface where grass has texture
The change of state in which a solid becomes a liquid is called ______. a liquefaction b melting c condensation d sublimation
How many atoms are in 1.9 g C? Answer in units of atoms.
Answer:
9.5E22
Explanation:
(1.9/12.011)×6.02E23
I need help please answer
Where do the glucose molecules that our cells need come from?
Answer:
glucose molecules that our cells need from is plants
Newton’s third law of motion included which terms?
Based on the oxidation states of the atoms in this reaction, answer the questions. 4Fe(0) + 3O2(0) → 2Fe2(3+)O3(2-) How many electrons does the iron half-reaction lose? How many electrons does the oxygen half-reaction gain? What is the total number of electrons that are moved in this oxidation-reduction reaction?
Answer:
Twelve electrons
Explanation:
If we look at the product side, we will notice that iron lost twelve electrons and oxygen gained twelve electrons.
Hence, we have 4Fe^3+ and 2O3^2- showing twelve electrons lost/gained.
Answer:
How many electrons does the iron half-reaction lose?
12
How many electrons does the oxygen half-reaction gain?
12
What is the total number of electrons that are moved in this oxidation-reduction reaction? 12
Explanation:
What happens when the number of particles in an atom is changed
Answer:
When the number of particles, though in this case I think you mean (electrons), changes in an atom....it become an ion. Ions are atoms that were chnaged by losing or gaining an electron. If an atom gains an electron it will have a negative charge. If an atom loses an electron it will have a positive charge. Hope this was helpful!!
Explanation:
