Answer:
833.12g
Explanation:
Use the mole=mass/mr equation (rearrange this to find mass)
Mr= 164
So, 5.08 x 164 = 833.12g
The mass in grams of 5.08 mol Ca(NO3)2 is =833.12g
What is a mole?
The mole is the amount of substance of a gadget which includes as many standard entities as there are atoms in zero.012 kilogram of carbon 12;
Molecular mass of Ca(NO3)2 = 40+(14+48)*2
=40+124
= 164 g
1 mole of Ca(NO3)2 = 164 g
5.08 mole of = 5.08*164g
=833.12g
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1 Unit 3 Lab Part 1
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Answer:
hhhhdhabbjdksdalitkslhbdlqhbdndnvlirladiksha pokgjwnfkfdiksha pokhrel shhddhhgkd
Which diatomic molecule (H2, N2 or O2) forms the strongest bond and why
Answer:
Hydorgen will.
Because hydrogen has 1 as valency.
DNA
What organism is often used to study mutations
Answer:
Hartwell's yeast
Explanation: A model organism for studying somatic mutations and cancer."
Which of these forces does not act over a distance?
A. Friction
B. Electric
C. Magnetic
D. Gravitational
Calculate the molarity of a solution that contains 85.0 g of Zn(C2H3O2)2 in 250. mL of solution (don't forget to convert mL to L first). Round to the nearest hundredth.
Answer:
[Zn(C₂H₃O₂)₂] = 1.85M (3 sig-figs accurate to 0.01 Molar)
Explanation:
Concentration is defined as amount of solute in a specified volume of solution. That is, Concentration = mass of solute/volume of solution (solution = solute + solvent). When concentration is in terms of Molar values the essential relationship is Molarity(M) = moles solute / volume of solution in liters.
For this problem => first, convert mass of Zn(C₂H₃O₂)₂ into moles and then the volume of solution into liters. Take ratio of moles/volume of solution (L).
=> Molar Concentration = moles of Zn(C₂H₃O₂)₂ / Liters of solution
moles of Zn(C₂H₃O₂)₂ = 85.0 grams Zn(C₂H₃O₂)₂ / formula weight of Zn(C₂H₃O₂)₂ = 85.0g/183.5g·mole⁻¹ = 0.463 mole Zn(C₂H₃O₂)₂.
Volume of solution in Liters = 250ml / 1000ml/L = 0.250 liters
Molarity of Zn(C₂H₃O₂)₂ solution = 0.463 mole Zn(C₂H₃O₂)₂ /0.250 liters of solution = 1.85 Molar in Zn(C₂H₃O₂)₂
_____________
Note: The symbiology convention for 'molar solution concentration' is to place brackets around the molecular formula. That is, [Zn(C₂H₃O₂)₂] = 1.85M
State the name of the ion which is oxidised in the following half equations. Cathode: Na+ + e– → Na Anode: 2Cl– → Cl2 + 2e–
Answer:
hahahahhahhhahahaha
Explanation:
haahahahahhahahhaha
The chemical formula of aspirin is C9H8O4. What is the mass of 0.40 mol
of aspirin?
Answer:
[tex]\boxed {\boxed {\sf About \ 72 \ grams }}[/tex]
Explanation:
To convert from moles to grams, we must use the molar mass (also known as the gram formula mass).
First, look up the molar masses of the elements in the formula.
C: 12.011 g/mol H: 1.008 g/mol O: 15.999 g/molNext, multiply by the subscript, because it tells us the number of atoms of each element in the formula.
C₉: 4(12.011 g/mol)= 108.099 g/mol H₈: 8(1.008 g/mol)= 8.064 g/mol O₄: 4(15.999 g/mol)= 63.996 g/molAdd the values.
108.099 + 8.064+63.996=180.159 g/molUse this molar mass as a ratio.
[tex]\frac {180.159 \ g \ C_9H_8O_4}{1 \ mol \ C_9H_8O_4}[/tex]
Multiply by the given number of moles, 0.40
[tex]0.40 \ mol \ C_9H_8O_4 *\frac {180.159 \ g \ C_9H_8O_4}{1 \ mol \ C_9H_8O_4}[/tex]
The units moles of aspirin cancel.
[tex]0.40 *\frac {180.159 \ g \ C_9H_8O_4}{1 }[/tex]
[tex]72.0636 \ g \ C_9H_8O_4[/tex]
The original number of moles has 2 sig figs (4 and 0), so answer must have the same. For the number we calculated, it is the ones place. The 0 in the tenth place tells us to leave the 2.
[tex]72 \ g[/tex]
A weight of 8.7 N is attached to a spring that has a spring constant of 190 N/m. How much will the spring stretch?
Given values are:
Force, Fs = 8.7 NSpring constant, k = 190 N/mAs we know the relation,
→ [tex]Fs = K\times x[/tex]
or,
→ [tex]x = \frac{Fs}{k}[/tex]
By putting the values, we get
[tex]= \frac{8.7}{190}[/tex]
[tex]= 4.6\times 10^{-2} \ m[/tex]
Thus the response above is right.
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Calculate how many molecules are in 25.1 grams of N2.
answer choices:
1. 1.08 x 10^24 molecules N2
2. 6.02 x 10^23 molecules N2
3. 6.31 x 10^22 molecules N2
4. 5.39 x 10^23 molecules N2
ILL GIVE 100 POINTS!!!HELP!! THIS IS FOR CHEM!!an object acted upon by an unbalanced force will accelerate in the direction of the force is newtons what law?
1:second law
2:first law
3:third law
Eyes, nose, mouth would each be an example of a(n)
a. organ system
b. Cell
c. tissue
d. organ
Answer:
I think it is Organ
Explanation:
I need someone to help me awnser is you have a min
The chemical equation, Cr + Fe(NO3)2 → Fe + Cr(NO3)3, is an example of which type of reaction?
Answer:
Redox type
Explanation:
The reaction is:
2Cr + 3Fe(NO₃)₂ → 2Fe + 2Cr(NO₃)₃
2 moles of chromium can react to 3 moles of iron (II) nitrate in order to produce 2 moles of iron and 2 moles of chromium nitrate.
If we see oxidation state, we see that chromium changes from 0 to +3
Iron changed the oxidation state from +2 to 0
Remember that elements at ground state has 0, as oxidation state.
Iron is being reduced while chromium is oxidized. Then, the half reactions are:
Fe²⁺ + 2e⁻ ⇄ Fe (Reduction)
Cr ⇄ Cr³⁺ + 3e⁻ (Oxidation)
When an element is being reduced, while another is being oxidized, we are in prescence of a redox reaction.
specific heat is defined as the amount of heat in what
Answer:
Specific heat is the amount of energy that must be added, in the form of heat, to one unit of mass of the substance in order to cause an increase of one unit in temperature.
Explanation:
Answer:
Specific heat is the amount of energy that must be added, in the form of heat, to one unit of mass of the substance in order to cause an increase of one unit in temperature.
Explanation:
The term "para" in Paralympics means?
Answer:
It means beside or alongside.
Answer:
The word Paralympics means “parallel with the Olympics”, with the para prefix coming from the Greek word for alongside. The name was chosen to embody the spirit of the two movements existing side-by-side.
Explanation:
It takes 5.54 mL of a 2.18 M NaOH solution to neutralize 6.19 mL of an HCl solution. What is the concentration of the HCl solution? Do not include units in your
answer. Round to the tenths place or further.
Answer:
2 M
Explanation:
NaOH + HCl --> NaCl + H2O,
5.54 mL = .00545 L,
If we consider 2.18 M, M [molarity] = mol/L, so we have 2.18 mol/L. From this we can get the moles of NaOH.
.00545 L * 2.18 mol/L ≈ .0121 mol
The concentration of HCl can be found from the following:
.0121 mol = .00619(x) [where x = concentration of HCl]
x = 1.955 M ≈ 2 M
We equate the two as we require the same amount in order to neutralize the base.
50 POINTS
Which will reduce the possible environmental damage associated with mining uranium?
A. installing newer water recycling systems in older power plants
B. increasing the reprocessing of used fuel for reuse
C. building additional fission nuclear power plants
D. developing better places to store radioactive wastes
Magnesium hydroxide is 54.87% oxygen by mass.
How many grams of oxygen are in 175 g of the com-
pound? How many moles of oxygen is this?
Answer:
hhmxui
Explanation:
A certain first-order reaction has a half-life of 20.0 minutes. How much time is required for this reaction to be 75% complete?
Answer:
X = 2
Explanation:
As you know, the rate of a first-order reaction depends linearly on the concentration of a single reactant. The rate of a first-order reaction that takes the form
A tree is an example of an object that contains chemical energy
True or false
please help
Answer:
false
Explanation:
Help me pretty please
Answer:
C
Explanation:
Answer:
I think ur answer would be C.)
Explanation:
hope this helps
A removal of the predator populations from an ecosystem would most likely result in
Answer:
Overpopulated prey.
Explanation:
Because if you remove the predators from the picture who's gonna eat the prey? So it would only make sense that the prey would overpopulate! Hope this helped! (^-^)
A removal of the predator populations from an ecosystem would most likely result in overpopulated prey.
What is ecosystem?An ecosystem, sometimes known as just an ecological system, primarily made up of all the species that dwell in the physical environment. These abiotic components are linked via nutrition cycles as well as energy fluxes.
Animals contribute significantly to the transport of nutrients as well as energy through the system by consuming plants and each other. They also influence the biomass concentrations of microbial and plant populations. A removal of the predator populations from an ecosystem would most likely result in overpopulated prey.
Therefore, a removal of the predator populations from an ecosystem would most likely result in overpopulated prey.
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help fast plssssssssssssssssssss
In a chemical reaction
1 point
The atoms of the reactants unbond, rearrange and then rebond to form the products
Some atoms disappear while others multiply to form the products
The atoms of the reactants always stay together to form the products
New atoms are formed which combine to make the products
Answer:
A) The atoms of the reactants unbond, rearrange and then rebond to form the products
Explanation:
Using method of elimination:
A) The atoms of the reactants unbond, rearrange and then rebond to form the products
This is the correct option. Chemical reactions involves breaking and forming of new bonds.
B) Some atoms disappear while others multiply to form the products
This option is incorrect. Atoms do not disappear
C) The atoms of the reactants always stay together to form the products
This option is incorrect. The bonds between the atoms in the reactants must first be broken before products can be formed.
D) New atoms are formed which combine to make the products
This option is incorrect. Atoms do not just form out of nowhere.
how many molecules of NaCl are in 32.5 G
Answer :32,5 g NaCl equal 0,556 moles.
Explanation:
Helppp me pretty please
Answer:
I think the correct answer would be the second one
Which group of microorganisms has the ability to mutate?
OMG PLEASEEEE HELPPPPPPPPPPP!!!!!!!!!!!
Answer:
the second one
Explanation:
THE answers is b
The force that is pulling down on a person or object on the surface of the Earth is
called (attraction of matter to matter)?
normal force
mass
weight
gravity
What measures are being taken to minimize the threat of green iguana?
Answer:
use wire nettings
Explanation:
and cages