The correct answer is "Greater at 72 °F " hope it helps
Four students each measured the mass of 1.43g sample four times
Answer:
look up 4 divided by 1.43
I need help pleaseee!!!!!!!! Fast
Answer:
C.) 1700 Pa
Explanation:
300 k - 0.3 m^3 = 17000
what is meant by dative covalent bond
A coordinate covalent bond, also known as a dative bond, dipolar bond, or coordinate bond is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom. The bonding of metal ions to ligands involves this kind of interaction. This type of interaction is central to Lewis theory.
Compare the types of elements in covalent molecular compounds vs. ionic compounds. explain
Answer:
Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral. Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other.
Explanation:
Hope this helps.
the mass number for an atom is numerically equal to which quantity
Answer:
The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.
Explanation:
protons
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
Convert 7,442 fluid Ounces (oz) to liters (L) rounding to 4 sig figs
Answer:
220.1 litres
Explanation:
7442 ounces to litres is 220.0892.
Rounding it to 4 significant figures will make it 220.1
A 0.8612-g sample of a mixture of NaBr, NaI, and NaNO3 was analyzed by adding AgNO3 and precipitating a 1.0186-g mixture of AgBrand AgI. The precipitate was then heated in a stream of Cl2, convertingit to 0.7125 g of AgCl. Calculate the %w/w NaNO3 in the sample.
Percentage by weight of the NaNO₃, is given by the ratio of the mass of NaNO₃ to the mass of the sample
The percentage by weight of NaNO₃ in the sample is approximately 30.713 %
Reason:
Given parameters are;
Mass of sample of NaBr, NaI, and NaNO₃ mixture = 0.8612 g
Mass of AgNO₃ and AgI formed = 1.0186
Mass of AgCl formed = 0.7125
Required:
Percentage by weight of NaNO₃ in the sample
Solution:
Let A represent NaBr, let B represent NaI, and let C represent NaNO₃, we have;
Equation 1 A + B + C = 0.8612
The addition of AgNO₃, precipitates 1.0186 g mixture of AgBr and AgI, therefore, we have;
[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgBr}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgI}{Molar \ mass \ of \ NaI} \right) = 1.0186[/tex]
Molar mass of AgBr = 187.77 g/mol
Molar mass of NaBr = 102.894 g/mol
Molar mass of AgI = 234.77 g/mol
Molar mass of NaI = 149.89 g/mol
Which gives;
Equation 2 [tex]A \cdot\left(\dfrac{187.77}{102.894} \right) + B \cdot \left(\dfrac{234.77}{149.89} \right) = 1.0186[/tex]
The forming of the precipitate by passing the compounds through a stream of chlorine gives;
[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaI} \right) = 0.7125[/tex]
Molar mass of AgCl = 143.32 g/mol
Therefore, we get;
Equation 3 [tex]A \cdot\left(\dfrac{143.32}{102.894} \right) + B \cdot \left(\dfrac{143.32}{149.89} \right) = 0.7125[/tex]
Solving equation (2), and (3) gives;
A ≈ 0.3252 g, B ≈ 0.2715 g
Plugging in the values of A, and B in equation (1), gives;
0.3252 + 0.2715 + C = 0.8612
C = 0.8612 - (0.3252 + 0.2715) ≈ 0.2645
The mass of NaNO₃ in the mixture, C ≈ 0.2645
[tex]The \ percent \ by \ weight \ of \ NaNO_3 = \dfrac{0.2645}{0.8612} \times 100 \approx \underline{30.713 \%}[/tex]
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How does the chemical structure of ionic liquids make them more flexible for scientists to use and what will most likely be the first industrial application of them?
Explanation:
Ionic liquids offer numerous advantages over conventional organic solvents for carrying out organic reactions, Malhotra notes. "In many cases, product recovery is easier, catalysts can be recycled, and the ionic liquids can be reused," he says. "In addition, their thermodynamic and kinetic behavior is different.
A HOMOGENEOUS LIQUID THAT CANNOT BE SEPARATED INTO ITS COMPONENTS BY DISTILLATION BUT CAN BE DECOMPOSED BY ELECTROLYSIS IS CLASSIFIED AS A/AN _______________.
ELEMENT
SUBSTANCE
COMPOUND
SOLUTION
Answer:
ELEMENTS
Explanation:
CUZ AN A
ELEMENT IS A GROUP OF ATOMS THAT CANNOT BE BROKEN DOWN BY ANY CHEMICAL OR PHYSICAL MEAN
De quien es el modelo matemático
Answer:
si
Explanation:
Help me pls I will mark you as brain
Answer:Infection with a pathogen does not necessarily lead to disease. Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.
Explanation:
Can someone help me to write the ionic equation :((
Answer:
Here use this to help you
Explanation:
why do we need to calibrate equipment
Answer:
to be precise in the calculations
Explanation: for example your cell phone has a gps inside it, the gps is responsible for providing direction data like a compass, if the equipment is not calibrated, the gps will not find the correct direction.
How many moles of HCl will be produced when 34.56 g of AIC3 are reacted according to this chemical equation
Answer:The answer to your question is It will be formed 0.39 moles of H₂
Data
moles of H₂ = ?
moles of HCl = 0.78
moles of Zinc = excess
Balanced chemical reaction
2 HCl + Zn ⇒ 1 H₂ + ZnCl₂
Process
Explanation:
1.- Use proportions to solve this problem. Consider the coefficients of the balanced reaction.
2 moles of HCl ---------------------- 1 mol of H₂
0.78 moles of HCl ----------------- x
x = (0.78 x 1) / 2
- Simplification
x = 0.78 / 2
- Result
x = 0.39 moles of H₂
What gas is dissolved into soft drinks such as soda which causes them to bubble when opened? A. Carbon dioxide B. Ethylene C. Hydrogen D. Argon
Answer: A, Carbon Dioxide
Explanation:
A. Soda water, like other carbonated beverages, contains carbon dioxide that has dissolved under pressure. When the pressure is released by opening the soda container, the liquid cannot hold as much carbon dioxide, so the excess bubbles out of the solution.
Answer:
A. carbon dioxide
Explanation:
the answer is A
a motorcycle travels 95.0 km/hr. how many seconds will it take the motorcycle to cover 2.70*10^3 m?
How many moles in 5.75 x 1024 atoms of copper (Cu)? (9.55 mol)
Answer:
9.55 moles
Explanation:
How many moles are equivalent to 5.75x1024 atoms of Al? 9.55 moles contain 5.75 x 1024 atoms of Al
a helium laser emits light with a wavelength of 633nm. what is the frequency of light
Answer:
14 ft 7 inches
step-by-step explanation:
since each model inch corresponds to 25 real inches, 7 model inches will correspond to
7×25" = 175"
at 12" per foot, that is 14 feet, 7 inches.
Explanation:
The density of a liquid is 6.0g/cm3 , when it fills a container of volume 300cubic centimeters . What is the mass of the liquid in the container?
Answer:
1800g
Explanation:
b/c d=m/v
m=dv
m=300×6=1800g
The mass of the liquid in the container is equal to 1800 g.
What is the density?The density of an object can be described as the mass per unit volume of the object. The average density of any substance equals the total mass of the substance divided by its total volume.
The mathematical formula of the density can be expressed as follows:
The density of material = Mass/Volume
Mass = density × Volume
The S.I. unit of the density of any substance is Kg/m³ and it is an intrinsic property. If the size of the substance increases, the mass increases as well but the density of the substance will stay constant.
Give, the density of the liquid, d = 6.0 g/cm³
The volume of the container, V = 300 cm³
The mass of the liquid = 6 ×300 = 1800 g
Therefore, the mass of the liquid is equal to 1800 g.
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the fact that matter is not created or destroyed in any chemical or physical change is called the
Answer:
Law of Conservation of Mass.
Is that Right?
how many sets of lone pairs are around sulfur in sf4?
Answer:
One Lone Pair. (I think)
Explanation:
PLEASE HELP!!
Which element in Fe(NO3) is a metal?
O
N
Fe
Answer:
Explanation:
Most periodic tables have a staircase thick line on their right side. This line separates the metals from the non metals.
O (oxygen) and N (nitrogen) are on the right side of the staircase.
Fe is on the left.
Those elements on the right side of the staircase are non metals.
Those elements on the left of the staircase are metals, so Fe is a metal.
identify the number of bonding pairs and lone pairs of electrons in water.
Answer:
2 bonding pairs and 2 lone pairs
If you have 24.19 moles of nickel, how many atoms do you have?
Answer:
No idea
Explanation:
I'll tell u how to do it. You multiply by amidagros number. that is how many atoms you have. Your welcome.
I will brainless who can answer this all pleaseeeeej
Answer:
False, True, True, False, False, not sure, True, False, True, True
here u go
label the particles, charges, & mass for Elements: 6, 8 & 10?
Answer:
charges, & mass
Explanation:
3.7x10^45 molecules of hydrogen gas = how many grams of hydrogen gas
Since we weren't given the moles of hydrogen, we have to find it. However, we can do it all in one step if we set up the equation correctly.
Since Mass = moles × molar mass
& Moles = #molecules ÷ Avogadro's Number
∴ mass = (#molecules ÷ Avogadro's Number) × molar mass
= (3.7 × 10⁴⁵ mcules ÷ (6.022 × 10²³ mcules/mole)) × 1.008 g/mol)
= 6.19 × 10²¹ g
Using the periodic table, calculate the number of protons, neutrons, and electrons for Calcium, Argon, and Bromine.(Ca,Ar,Br)
Answer:
Calcium has 20 protons 26 neutrons and 20 electrons.
argon has 18 protons
22 neutrons and 18 electrons
Bromine has 35 protons 44 neutrons and 35 electonrs
Explanation:
good luck with your homework hope I helped
Someone pls help me I will make you brain
Answer:
i guess the answer is..true
the ozone in troposphere protects the earth from ultra violet waves that may cause global warming