Answer:
A fire proof
Explanation:
I hope this is help
OMG PLEASEEEE HELPPPPPPPPPPP!!!!!!!!!!!
Answer:
the second one
Explanation:
THE answers is b
Freezing and thawing water can cause a rock to break down into smaller pieces. Which part of the rock cycle is this an example of?
melting
weathering
subsidence
deposition
Answer:
Deposition
Explanation:
It’s breaking down the rock :]
Answer:
deposition
Explanation:
Ap3x
What results when equal but opposite charges are present in two regions of a polar molecule? A. dipole B. ionic bond C. Electron sea D. crystal lattice
Answer: A. dipole
Explanation:
Dipole can be defined as the separation of the equal and opposite charges present in the molecule via ionic bonding. The water molecule comprising of two molecules of hydrogen being positively charged and one molecule of oxygen being negatively charged are connected via ionic bonding thus water molecule is an example of dipole molecule. There is unequal distribution of the electrical density throughout the molecule.
The polar molecule results in a dipole when equal but opposite charges are present in two regions.
Dipole:
Dipole arises when a molecule have opposite and equal charge in the ends.
For example - water molecule
In water molecule Oxygen is negatively charged and hydrogen have low electronegativity, this difference in electronegativities arise dipole in molecule.
Therefore, the polar molecule results in a dipole when equal but opposite charges are present in two regions.
To know more about Dipole,
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Which of the following chemical reactions produces water via a
synthesis reaction?
a 2H2 + O2 + 2H2O
b NaOH + HCI - NaCl + H2O
C CuO + H2 - Cu + H2O
d H2CO3 → CO2 + H2O
Answer:
Should be A, but also I think there should be an arrow between O2 and 2H2O
How many lone pairs does this molecule have?
Answer:
Just 1 i.e., Option B.
Because except for top of the molecule, all other sides are filled with a letter meaning there is one free space.
Answer:
B
Explanation:
H . + H . -----> H:H {":" represents a covalent bond, that is, a shared pair of electrons}
A Lewis structure is a convention used to represent the covalent bonding in a molecule. Dots or lines are used to represent
valence electrons (electrons available for bonding). The Lewis structure for the hydrogen molecule is as follows.
H:H or H-H
A bonding pair is an electron pair shared between two atoms.
A nonbonding pair (lone pair, unshared pair) is a pair of electrons that remains on one atom and is not shared.
HELP PLEASE❗️❗️‼️
An increase in temperature is an increase in.... ( there are two correct answers)
A.) Water molecules
B.) The melting point
C.) pressure
D.) Fun
Where are the volcano located
Answer:
In the ring of fire
Hope this acc helps
बा
If OPPOSITE poles (N and S) of
a magnet are placed near
each other, what happens?
Type answer here
Answer:
They attract each other
Explanation:
A magnet has two poles;
North pole and south pole
When two opposite poles are placed close to each other, they attract each other. The short rule is opposite opes attract.
When two like poles are placed close to each other, they repel each other. The short rule is like poles repel.
4 Hydrogen has three naturally occurring isotopes. H.1, H-2, and H-3 The atomie mass of Hydrogen is 1.097 Which isotope is most abundant in nature? Explain
Answer:
The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes.
Since, the average atomic mass of the hydrogen is nearest to 1 then, the most abundant isotope should be hydrogen-1.
How many grams are in 8.50 e 23 formula units of NaCl?
a)82.5 g
b)8.25 g
c)85.0 g
d)91.5 g
Answer:
a)82.5 g
Explanation:
To solve this problem we will use Avogadro's number, which states the number of formula units per mole.
8.50x10²³formula units ÷ 6.023x10²³ formula units/mol = 1.41 molThen we convert 1.41 moles of NaCl to grams, using its molar mass:
1.41 mol NaCl * 58.44 g/mol = 82.4 gThe closest answer is option a).
1)how is ice made?
2)what materials does it use?
3)how is it put together
Answer:
milk and sugar and vinillia it uses a machine and you stir until it forms
Explanation:
How did chemists make their proposed model of the sub atomic particles?
Answer:
Because they want to clarify or give solution to the particle that the other didn't know
Explanation:
Correct me if im wrong thanks
Silver is a metal; it reacts with oxygen which is a non-metal to form Silver Oxide. The bond between Silver and Oxygen is called
(Related to Science)
If 3.22 g of precipitate are recovered from the reaction of limewater (Ca(OH),) with carbon dioxide to produce
water and calcium carbonate, what is the percent yield if 20.0 g of carbon dioxide was mixed with the
limewater?
the correct answer is 7.1% but i don't understand what they did
Answer:
Percent yield = 7.1%
Explanation:
The general reaction of the problem is:
Ca(OH)₂ + CO₂ → H₂O + CaCO₃
To solve this question we need to find theoretical yield using the amount of carbon dioxide added because:
Percent yield = Actual yield (3.22g) / Theoretical yield * 100
Theoretical yield is the maximum amount of product that could be obtained. To find it we need to convert the mass of CO₂ to moles. The moles of CO₂ = Moles of CaCO₃:
Moles CO₂ -Molar mass: 44.01g/mol):
20.0g * (1mol / 44.01g) = 0.454 moles CO₂ = Moles of CaCO₃ produced
Mass CaCO₃ = Theoretical yield -Molar mass: 100.09g/mol-:
0.454 moles * (100.09g / mol) = 45.5g of CaCO₃ = Theoretical yield.
Replacing:
Percent yield = 3.22g / 45.5g * 100
Percent yield = 7.1%is lime flavor ionic or covalent
Answer:Calcium carbonate (CaCO3), essentially, is an ionic compound having the bivalent calcium and carbonate ions. But the carbonate anion is a polyatomic species. The carbon atom is bonded to all the three oxygen atoms by covalent bonds - two carbon-oxygen single bonds and one carbon-oxygen double bond.
Explanation:So it's ionic hope this helps u. Btw may i have brainlist plz.
True or false The difference between solids and liquids is that solids have definite shape and volume, while liquids have no define volume
Answer:
False
Explanation:
Answer:
true! :) hope it helps
If today is Monday and it is a 1st Quarter moon, what phase will it
be on Thursday?
Answer:
Wanning gibouss 56%
Explanation:
Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution.
Answer:
https://newshamchem.weebly.com/uploads/2/2/0/3/22035226/molarity_&_worksheet_answer.pdf
question 9.
Explanation:
Answer:
.0125 moles
Explanation:
Molarity = moles/volume
.05 M = moles/.250L
.0125 = moles
someone plz help me.
Answer:
The answer is 2.
Explanation:
It is the only one that has a chemical change.
Hope this helped you :)
If so pls give brainliest.
what kind of chemical reaction is this?
Answer:
Ethane Combustion Reaction or just Combustion Reaction
Explanation:
If combining cation A with a +3 charge and anion X with a -3 charge, how would we write the compound?
O AX
O A3X3
O 3AX
Answer: it’s not A3X3
Explanation:
1. AX
For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.If a cation A carries +3 charge and an anion X carries -3 charge, the compound so formed is AX. Since the charges gets cancelled out.For example: consider aluminum phosphate, aluminum carries +3 charge and phosphate carries -3 charge, the molecular formula for the compound will be AlPO₄.Learn more:
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Measurements show that unknown compound X has the following composition:
element mass %
carbon 74.8%
hydrogen 25.1%
Write the empirical chemical formula of X. please help
the empirical chemical formula of X is CH4
Explanation:Step 1: Imagine you have a sample of compound weighing exactly . Multiply the mass of this sample by the mass percents to find the mass of each element in the sample
Step 2: Divide the mass of each element by the element's molar mass to find the moles of each element in the sample. Remember to round your answers to the correct number of significant digits.
Step 3: Divide the moles of each element by the the smallest number of moles of any element to find the mole ratio of elements in the sample.
Step 4: Multiply the mole ratio by the smallest whole number that changes it into a whole number ratio to find the atom ratio of elements in the sample.
Note that the result of each multiplication must equal a whole number only within measurement uncertainty.
The measurement uncertainty in this calculation comes from the measurement uncertainty of the mass percents given in the question. The mass percents each have significant digits. That means each mass percent has some measurement uncertainty in the third significant digit, and only the first two significant digits can be considered completely reliable.
In Step 1 you multiplied each mass percent by something with zero uncertainty (the exactly you assumed your sample weighed), in Step 2 you divided by a measurement with more than significant digits (the molar mass of the elements), and in Step 3 you divided by a measurement with the same number of significant digits (the least number of moles of any element in the compound). None of these steps added to the measurement uncertainty of your calculation.
Therefore, the measurement uncertainty in the final result of all your calculations is determined by the measurement uncertainty in the original mass percents and will be in the third significant digit. That means the result of each of the final multiplication steps must equal a whole number only to within the first two significant digits.
The whole numbers in the last column of the table are and .
Helppp me pretty please
Suppose you add water to 6 g of sugar to make a solution with a concentration of 3 g/l What is the total volume of the solution?
Answer:
no
Explanation:
Balance the equation by typing in the correct coefficients into the blank spaces in front of each formula. Type 1 if
the coefficient is 1, do not leave space blank
_EH + _ G2 → _EG + _HG2
Answer:
2 in front of every one
Explanation:
HOPE IT HELPS
How do you find the scientific notation of a Avogadro's number??
Answer: ummmmmm hmmmmm
Explanation:
A rectangular poster is /4 yard wide and / yard tall. What is its area? Solve this problem any way you choose
Answer:
Area of rectangular poster = [tex]\frac{3}{16}[/tex] yard²
Explanation:
P.S - The exact question is -
Given - A rectangular poster is [tex]\frac{1}{4}[/tex] yard wide and [tex]\frac{3}{4}[/tex] yard tall.
To find - What is its area ?
Proof -
We know that ,
The area of rectangle = Length × Breadth
Here,
Given that,
Length of rectangle = [tex]\frac{3}{4}[/tex] yard
Breadth of rectangle = [tex]\frac{1}{4}[/tex] yard
∴ we get
Area of rectangular poster = [tex]\frac{3}{4}[/tex] × [tex]\frac{1}{4}[/tex] yard²
= [tex]\frac{3}{16}[/tex] yard²
⇒Area of rectangular poster = [tex]\frac{3}{16}[/tex] yard²
PLS HURRY MY TEST IS TIMED
Currently, some commercially available explosives are tagged with traceable
radioactive isotopes
chemical markers
cell-signal components
acetone compounds
Answer:chemical markers
Explanation:
I’m smart give brainlest plz
What does Boyle's Law describe?
Answer: Image result for What does Boyle's Law describe?
This empirical relation, formulated by the physicist Robert Boyle in 1662, states that the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature; i.e., in equation form, pv = k, a constant.
Explanation:
Which of these compounds has the largest percentage by mass of nitrogen? NO N2O NO2 N2O3
The largest mass percentage of nitrogen in NO. Therefore, option (A) is correct.
What is the mass percentage?The percentage by mass of an element in a chemical compound can be described as the number of parts by mass of the element contained in 100 parts by mass of a chemical compound.
The mass percentage of an element can be determined in two steps:
First, calculate the molar mass of the compound and then the percentage of each element by dividing the total mass of the element present in the compound by the molecular mass of the compound multiplied by 100.
Given, the molecular formula of the compound is NO.
The molecular mass of the NO = 30 g/mol
The mass percentage of the Nitrogen = (14/30) × 100 = 46.67 %
the molecular formula of the compound is NO₂.
The molecular mass of the NO = 46 g/mol
The mass percentage of the Nitrogen = (14/46) × 100 = 30.4 %
the molecular formula of the compound is N₂O.
The molecular mass of the NO = 44 g/mol
The mass percentage of the Nitrogen = (14/44) × 100 = 31.81 %
the molecular formula of the compound is N₂O₃.
The molecular mass of the NO = 76 g/mol
The mass percentage of the Nitrogen = (28/76) × 100 = 36.84 %
Learn more about the mass percentage, here:
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