Answer:
I do
Explanation:
I would love points because I like them.
what is the range of 11, 24, 37, 44, and 62?
Answer:
51
Explanation:
Range= the difference between highest number and lowest number in a data set. For this, range =62-11 = 51
hope this helps
What is the Average Speed?
Distance: 10m
Time: 55
0 2m/s
15m/s
50m/s
O 20m/s
Answer:
0.2m/s
Explanation:
speed =d/t
10/55= 0.181
approximately 0.2m/s
Answer: it is b.
Explanation: Average Speed = Total Distance
Total Time
= 10m/5s
=2m/s
Hope this helps!!
is LaCl3 an ternary ionic compound
Answer:
yes
Explanation:
a ternary compound is a compound containing three different elements. An example is sodium phosphate, Na3PO4. The sodium ion has a charge of 1+ and the phosphate ion has a charge of 3-. Therefore, three sodium ions are needed to balance the charge of one phosphate ion.
PLS HELP
Which of these elements has the largest atomic radius
a.carbon
c. aluminum
b. potassium
d. oxygen
Calculate the density for a rectangular block using the following measurements: Length = 10 cm, Width = 1.1 cm, Height = 15 cm, Mass = 65.2 grams.
Question 3 options:
4.35 g/cm3
0.40 g/cm3
2.53 g/cm3
6.52 g/cm3
Answer:
0.40 g/cm3
Explanation:
density = mass / volume.
mass = 65.2 grams
volume = 10*1.1*15=165 cm3
so density = 65.2/165=0.40 g/cm3
A student measures the time it takes for two reactions to be completed.
Reaction A is completed in 12 seconds, and reaction B is completed in 21
seconds. What can you conclude about the rates of these reactions?
A. The rates of reactions A and B are equal.
B. The rate of reaction A is lower.
C. The rate of reaction B is lower.
Answer:
c
Explanation:
because the left side of reactant is take more time to make a product than the first
The rate of these reactions should be considered as the option b. The rate of reaction A is lower.
Conclusion of the rate of reactions:Since Reaction A is completed in 12 seconds, and reaction B is completed in 21 seconds.
So based on this, we can say that the rate of reaction A should be lower as it contain 12 seconds as compared to reaction b.
hence, the option b is correct.
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The specific type of bond that results from unequal sharing of electrons in the bond is
Answer:
It's called A polar covalent bond
Can someone help me plz
Answer:
d
Explanation:
i think
geologists classify sedimentary rocks as either clastic chemical or organic
Answer:
both. yes
Explanation:
Which of the following changes on different celestial objects due to the force of gravity?
Mass
Weight
Height
Width.
Use your periodic table of elements. Take any element from the second column, except for beryllium and calcium, and answer the following
questions: (5 points)
What is the element's name and symbol?
Is it a meial, nonmetal, or metalloid?
Which family does it belong to?
How many protons, neutrons, and electrons does its neutral atom have?
Answer:
Radium (Ra)
Metal
Alkaline Earth Metal
Protons & Electrons: 88
Neutrons: 138
Explanation:
Answer:
magnesium, Mg, metal, alkaline earth metals, its neutral atom has 12 protons and 12 neutrons and 12 electrons
Charge is important when covalent bonds form
true
False
3. Why was the International System of Units adopted?
Answer:
Explanation:
Because the units are specifically designed in such a way that anyone, anywhere could reproduce them. They are based on scientifically developed definitions. For example the meter is defined as
Current definition (1983): The distance traveled by light in vacuum in [tex]{\displaystyle {\frac {1}{299792458}}}{\displaystyle {\frac {1}{299792458}}}[/tex]second.
That does not look like a great improvement, but it is certainly better than the distance of 1/10,000,000 of the distance between the meridian going through Paris going from the North Pole to the equator. How would you even measure that without a guess somewhere?
The subunits are also much better. 1/10 of a meter is much easier to dial with than a foot or a yard which is very arbitrarily defined.
Explanation:
The international System of Units adopted to facilitate measurements of diverse quantities.
Your mother gives you 250 mg of acetaminophen and a cup containing 500 ml of water. What is the concentration of the solution if you dissolve the Tylenol in the water?
Answer:
The concentration is 50%
Explanation:
Mass-Volume concentration is molarity (M) times 100% or [tex]\frac{Gsolute}{Lsoln}[/tex] * 100%
For this problem, we need to convert from milligrams to grams and milliliters to liters in order to plug the values into the equation and solve for the concentration.
So, 250 mg = 0.025g (there are 1000 mg in 1 g)
And 500ml = 0.05 L (there are 1000 ml in 1 L)
Now we can solve for the concentration
[tex]\frac{0.025 g}{0.05 L}[/tex] [tex]* 100[/tex] %= 0.5 [tex]* 100[/tex] % = 50% of Tylenol concentration
Which of the following lists the correct symbol for the ion that tin forms when it loses 2 electrons, the correct classification of the ion as an anion or a cation, and the name of the ion?
A) Sn; cation; tin(II) ion
B) Sn; anion; tin(II) ion
C) Sn; anion; tin ion
D) Sn; cation; tin ion
Answer:
[tex]\huge\boxed{\sf Option \ A}[/tex]
Explanation:
The symbol for TIN is Sn.
When Sn loses 2 electrons, it gets a double positive charge ( +2 ) and becomes [tex]\sf Sn ^{+2}[/tex].
It becomes a cation.
The name of Ion is Tin ( II ) Ion.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Answer:
option a
Explanation:
gradpoint
What is the most likely oxidation state of nitrogen?
A. +3
B. -2
C. +4
D. 3
Pls don’t steal points you’ll be reported
Answer:
-3
Explanation:
How much heat will a 45.00 g piece of glass require to change its temperature from 10 to 30 °C. The specific heat capacity is 0.500 J/g°C.
675 J
225 J
450 J
700 J
Answer:
Q = 450 J
Explanation:
Given that,
Mass of a piece of glass, m = 45 g
The temperature changes from 10°C to 30°C.
The specific heat is 0.5 J/g°C
We need to find heat required to raise the temperature. The formula that is used to find it is given by :
[tex]Q=mc\Delta T\\\\Q=45\times 0.5\times (30-10)\\\\Q=450\ J[/tex]
So, the required heat is 450 J. Hence, the correct option is (c).
To what temperature does a 250 mL cylinder containing 0.1 MOLHE need to be cooled in order for the pressure to be 253.2 5 K PA
we use the formula
pV=nRT
we convert Kilo Pascals to mmHg
253.25 KPa=253250 pascals
1mmHg is equal to 133.322 pascals
xmmHg are equal to 253250pascals
x=253250/133.322=1900mmHg
now we convert mmHg to atmospheres
1 atmosphere is equal to 760mmHg
x atmospheres are equatl to 1900mmHg
x=1900/760=2.5 atmospheres
in the formula:
pV=nRT
p-pressure
V-volume
n-number of moles
R-ideal constant of gases
T-temperature
the only missing variable is temperature since we know that R=0.082
250ml=0.25L
0.25*2.5=0.1*0.082T
T=0.625/0.0082=76.219K
Change the following word equation into a formula equation AND balance it. Iron(III) carbonate --> Iron(III) oxide + Carbon dioxide
Will give brainliest blus 100 points
Which two reactions are faster than the others?
A. Methane burns in air that contains oxygen.
B. Silver tarnishes in air that contains hydrogen sulfide.
O C. A steel ship rusts in ocean water.
U
D. Hydrogen gas and oxygen gas react explosively to form water.
Answer:
i think its Hydrogen gas and oxygen gas react explosively to form water. and . Methane burns in air that contains oxygen.
Explanation: Mine was a little bit different than yours please forgive me if I'm wrong I chose answers that was similar to mine
Methane burns in air that contains oxygen and Hydrogen gas and oxygen gas react explosively to form water. These two reactions are faster than the others.
What is methane ?Chemically speaking, methane has the formula CH4. The simplest alkane and the primary component of natural gas, it is a group-14 hydride. The amount of oxygen breathed from the air might be decreased by high methane levels. This may include headaches, facial flushes, slurred speech.
Unscented, colorless, and combustible, methane is a gas. It is mostly used as fuel to produce heat and light. It is also employed in the production of organic compounds. Methane is frequently found in landfills, marshes, septic tanks, sewers, and other places where natural materials decompose.
Suffocation can result from high methane concentrations in enclosed spaces because methane reduces the amount of oxygen in the air. Lack of oxygen can cause headaches, nausea, lightheadedness, and unconsciousness.
Thus, option A and D are correct.
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Which of the following correctly shows the word equation for the reaction of aluminum and copper oxide yielding aluminum oxide and copper?
A. aluminum + aluminum oxide → copper + copper oxide
B. aluminum + copper oxide → aluminum oxide + copper
C. aluminum oxide + copper → aluminum oxide + copper
D. copper + aluminum → copper oxide + aluminum oxide
Answer:
The correct answer is B
Explanation:
Educere
aluminium + copper oxide → aluminium oxide + copper. Hence, option B is correct.
What is a word equation?A word equation represents a chemical reaction using the names of the substances involved.
aluminium + copper oxide → aluminium oxide + copper correctly shows the word equation for the reaction of aluminium and copper oxide yielding aluminum oxide and copper.
Hence, option B is correct.
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Which pair of orbitals has the same shape?
Your answer:
2s and 2p
2s and 1s
3p and 3d
more than one is correct
Answer:
2s and 1s
Explanation:
The s orbital is spherically symmetrical. The wave function depends on the distance from the nucleus and not on the direction.
The 2s and 1s orbitals are of the same shape only that the 2s orbital is larger than the 1s orbital.
The images of these orbitals are shown in the image attached.
The pair "2s and 1s" has the same shape. A complete explanation is below.
Throughout Mendeleev's table, the "s" orbital has a sphere as well as round symmetry. This same wave function would be determined by the difference again from the nucleus rather than the directions.These same 2s, as well as 1s orbitals, are approximately identical in form, with the exception being the 2s orbital appears bigger than the whole 1s orbital.
Thus the above alternative i.e., "option B" is appropriate.
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What is the mass percent composition of an element in a molecule?
A. The element's mass in the empirical formula divided by its molecular formula mass
B. The fraction of the molecule's mass that comes from the element's mass
C. The fraction of the element's mass that comes from one atom of the element
D. The fraction of the total number of atoms in the molecule that comes from the element
Answer:
Try B. The fraction of the molecules mass that comes from one atom of the element
The mass percent composition of an element in a molecule is the fraction of the molecule's mass that comes from the element's mass. The correct answer is option B.
Mass percentage is a way of expressing the amount of a substance in a mixture or solution as a percentage of the total mass of the mixture or solution.
The fraction of the molecule's mass that comes from the element's mass. This is calculated by dividing the mass of the element in the molecule by the total mass of the molecule, then multiplying by 100 to get a percentage.
[tex]\rm Mass \ percentage\ = \dfrac {mass\ of \ the \ element}{total\ mass\ of\ the \ molecule} \times 100[/tex]
Therefore, option B." The fraction of the molecule's mass that comes from the element's mass" is the correct answer.
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Pls Help this is my last question on the quiz - Which two types of energies involve changes in atoms or atom rearrangement?
Sound & Mechanical
Thermal & Electrical
Nuclear & Chemical
Radiant & Sound
Answer:
Sound & Mechanical (i think)
Explanation:
PLEASEEEEEEE HELP ITs SUPER IMPORTANT I NEED IT PRETTY PLEASE
Answer:
c I think I hope it helps
1. Explain why BCl3 monomer but BH3 exist as B2H6.
Answer:
See explanation
Explanation:
Both BCl3 and BH3 are electron deficient compounds. In these compounds, boron has six instead of eight electrons surrounding it's outermost shell.
BH3 is able to form a dimmer because of the small size of hydrogen atoms which enable them to be fitted between boron atoms. Large size chlorine atoms can not be fitted between boron atoms hence B2Cl6 does not exist.
which atomic particle has about the same mass as a proton but has no electrical charge?
Answer:
neutrons ................
Ian has been learning about different kinds of mixtures at school. While he was helping prepare dinner for his family, he noticed that some of the food they were making were different kinds of mixtures. What kind of mixture was their dinner if they were having spaghetti and meatballs? A. heterogeneous B. homogeneous C. solute D. suspension
The type of mixture if they were having spaghetti and meatballs for dinner is
a heterogeneous mixture.
Heterogeneous mixture involves two or more substances not having a
uniform composition in the mixture. The substances in the mixture are
usually differentiated easily.
In the case of the spaghetti and meatballs , there is no uniform composition
and they are easily differentiated which means that the mixture is a
heterogeneous mixture.
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can someone pls answer this i’ll love you
Answer:
we kno you already do :)
how heavy is one atom of hydrogen/
Answer:
Answer⤵The number in a mole, Avogadro's number, is related to the relative sizes of the atomic mass unit and gram mass units. Whereas one hydrogen atom has a mass of approximately 1 u, 1 mol of H atoms has a mass of approximately 1 gram.