Answer:
7.38654 in 54 grams
Explanation:
To get moles, you divide grams of a substance by molecular weight. The molecular weight of CO2 is 44 g/mol. 54g divided by 44/mol is 1.227moles.
You then need to multiply moles by Avogadro’s constant (6.022x10^23). That gives you 7.38654x10^23 molecules in 54 grams of CO2.
The number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.
• To find the number of molecules, first there is a need to find the number of moles in a substance.
• Moles are determined by using the formula, mass of substances/molecular weight of the substance.
• The molecular weight of CO2 is 44 gram per mole.
• So, the number of moles will be,
Number of moles = 54 g/44 g/mol = 1.227 moles
Now to determine the molecules, there is a need to multiply the moles with the Avogadro's constant, that is, 6.022 × 10²³. This comes out to be as,
= 1.227 moles × 6.022 × 10²³
= 7.39 × 10²³ molecules
Thus, the number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.
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Please write down the definitions of elements, compounds, mixtures, homogenous mixtures, and heterogenous mixtures.
Help please What would you do if your water was turned off? Where or how would you get water for you
and your family? Be specific, realistic, and creative on your answer.
Answer:
If the water was turned off i would go look for some in a river and filter it out and bring for my family too.
Explain:
How many moles of FeCI3 are present in 345.0 g FeCI3
Answer:
[tex]\boxed {\boxed {\sf About \ 2.127 \ moles \ of \ FeCl_3}}[/tex]
Explanation:
To convert from moles to grams, the molar mass must be used.
1. Find Molar Mass
The compound is iron (III) chloride: FeCl₃
First, find the molar masses of the individual elements in the compound: iron (Fe) and chlorine (Cl).
Fe: 55.84 g/molCl: 35.45 g/molThere are 3 atoms of chlorine, denoted by the subscript after Cl. Multiply the molar mass of chlorine by 3 and add iron's molar mass.
FeCl₃: 3(35.45 g/mol)+(55.84 g/mol)=162.19 g/molThis number tells us the grams of FeCl₃ in 1 mole.
2. Calculate Moles
Use the number as a ratio.
[tex]\frac{162.19 \ g \ FeCl_3}{1 \ mol \ FeCl_3}[/tex]
Multiply by the given number of grams, 345.0.
[tex]345.0 \ g \ FeCl_3 *\frac{162.19 \ g \ FeCl_3}{1 \ mol \ FeCl_3}[/tex]
Flip the fraction so the grams of FeCl₃ will cancel.
[tex]345.0 \ g \ FeCl_3 *\frac{1 \ mol \ FeCl_3}{162.19 \ g \ FeCl_3}[/tex]
[tex]345.0 *\frac{1 \ mol \ FeCl_3}{162.19 }[/tex]
[tex]\frac{345.0 \ mol \ FeCl_3}{162.19 }[/tex]
Divide.
[tex]2.12713484 \ mol \ FeCl_3[/tex]
3. Round
The original measurement of grams, 345.0, has 4 significant figures. We must round our answer to 4 sig figs.
For the answer we calculated, that is the thousandth place.
The 1 in the ten thousandth place tells us to leave the 7 in the thousandth place.
[tex]\approx 2.127 \ mol \ FeCl_3[/tex]
There are about 2.127 moles of iron (III) chloride in 345.0 grams.
to multiply food with the help of a simple machine
Answer:
Explanation:
Inclined Plane: Easy Lifting. An inclined plane is simply an even, sloping surface. ...
Wedge: Splitting and Separating. ...
Screw: Fastening and Moving. ...
Lever: Multiplying Force. ...
Wheel and Axle: Rolling. ...
Pulley: Hoisting Heavy Loads. ...
Scissors: Making the Cut. ...
Hand Truck: Mover's Friend.
im being timed
someone pls help
i have 3 minutes
1.) Name a metal and explain how the physical properties of this raw metal help change it into common household items?
2.)What is one chemical property Rb and Cu have in common?
When heat from the sun turns water into water vapor this is called?
A) condensation
B) runoff
C) precipitation
D) evaporation
Which manufacturing process is shown in the photograph?
O A. Forming
B. Combining
C. Conditioning
D. Separating
Answer:
c
Explanation:
Which of the following is an example of a mixture?
A. Ca
B. CO2 + H2 + O2
C. NaCl
D. C6H12O6
The first one to help me will get the brainliest and 50 points UwU
Answer:
B is because their not combined
Answer:
tru it's B
Explanation:
give the person above me brainliest if u want
Hydrogen ions _____.
are hydrogen atoms which have lost protons
are released by bases
have positive charges
have negative charges
are hydrogen atoms which have lost protons
4. Two bulbs have a resistance of 20 ohms when working normally. They are placed in a series
circuit whey they operate normally. What is the combined resistance of the two bulbs?
(1 Point)
22 ohms
20 ohms
10 ohms
40 ohms
Answer:
R = 40 ohms
Explanation:
Two bulbs have a resistance of 20 ohms when working normally.
When they are placed in series, the combined resistance is given by :
R = R₁ + R₂
We have, R₁ = R₂ = 20 ohms
R = 20 +20
= 40 ohms
Hence, the combined resistance of the two bulbs is 40 ohms.
At least how many elements are needed to create a compound
Answer:
Two
Explanation:
Answer:
two or more than two elements.
Organisms can be classified as
and
Answer:
Eukaryotes and prokaryotes
Explanation:
Can somebody plz help answer this science questions (only 1-2 sentences is good thx !
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST!…promise :D
Graduated cylinder is filled to 41.5mL with water, and a price of granite is placed in the cylinder displacing the level to 47.6mL. What is the volume of the granite piece in cubic centimeters
Answer:
6.1 cm³
Explanation:
To solve this problem we first need to keep in mind Archimedes' principle:
The volume of water (or any fluid) displaced by a submerged object is equal to the object's volume.With that in mind we calculate the volume of the granite piece in mililiters:
Volume displaced = 47.6 mL - 41.5 mL = 6.1 mLVolume of the granite piece = 6.1 mLGiven that one cubic centimeter is equal to one mililiter, the volume of the granite piece in cm³ is 6.1 cm³.
I need help with life in a pond?
4. A sample of gas has a pressure of 700 mmHg and 30.0°C. Ar what temperature would the pressure be 600 mmHg if the volume remains constant?
Answer:
T₂ = 259.84 K
T₂ = -13.31 °C
Explanation:
Given data:
Initial pressure = 700 mmHg
Initial temperature = 30.0°C (30+273.15 K = 303.15 K)
Final temperature = ?
Final pressure = 600 mmHg
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
700 mmHg /303.15 K = 600 mmHg / T₂
T₂ = 600 mmHg × 303.15 K / 700 mmHg
T₂ =181890 mmHg.K /700 mmHg
T₂ = 259.84 K
Temperature in celsius
259.84 K - 273.15 = -13.31 °C
Using the phase diagram for CO2, what phase is carbon dioxide in at -70°C
and 1 atm pressure?
A. It is in the liquid phase.
B. It is in the solid phase.
C. It is at its melting point.
D. It is in the gas phase.
its a gas phase because... it is
To solve this we must be knowing each and every concept related to phase diagram. Therefore, the correct option is option D that is it is in the gas phase.
What is phase diagram?A phase diagram is a graph that displays a substance's thermodynamic properties at various pressures and temperatures. The areas around the lines depict the substance's phase, while the lines depict the points in which the phases are in balance.
Where planes of equilibrium converge, triple points appear. The situation in which 3 components of matter may coexist is known as a triple point. Using the phase diagram for carbon dioxide, gas phase of carbon dioxide is present at -70°C. The correct option is option D.
Therefore, the correct option is option D that is it is in the gas phase.
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H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4
How many grams of NaNO2 do you need in order to make 24.14714 g of Na2SO4?
g (use 5 sig figs)
23.459 g NaNO₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Reading a Periodic TableUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN] H₂SO₄ + 2NaNO₂ → 2HNO₂ + Na₂SO₄
[Given] 24.14714 g Na₂SO₄
Step 2: Identify Conversions
[RxN] 1 mol Na₂SO₄ = 2 mol NaNO₂
Molar Mass of Na - 22.99 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of Na₂SO₄ - 2(22.99) + 32.07 + 4(16.00) = 142.05 g/mol
Molar Mass of NaNO₂ - 22.99 + 14.01 + 2(16.00) = 69.00 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 24.14714 \ g \ Na_2SO_4(\frac{1 \ mol \ Na_2SO_4}{142.05 \ g \ Na_2SO_4})(\frac{2 \ mol \ NaNO_2}{1 \ mol \ Na_2SO_4})(\frac{69.00 \ g \ NaNO_2}{1 \ mol \ NaNO_2})[/tex]Multiply/Divide: [tex]\displaystyle 23.4587 \ g \ NaNO_2[/tex]Step 4: Check
Follow sig fig rules and round. We need 5 sig figs (instructed).
23.4587 g NaNO₂ ≈ 23.459 g NaNO₂
Answer:
23.458
Explanation:
I just did the quiz
S
SIO₂ +3C Sic +20o
Sic ? mass in grams
С c-
Answer:
26.74g
Explanation:
The equation of the reaction is;
SIO₂ + 3C --> SiC +2CO
From the balanced equation, the relationship between SiC and C is;
3 mol of C produces 1 mol of SiC
Converting mol to mass using; Mass = moles * Molar mass
Mass of SiC = 1 mol * 40.11 g/mol = 40.11g
This means;
3 mol of C produces 40.11g of SiC
2 mol of C produces xg of SiC
3 = 40.11
2 = x
x = 2 * 40.11 / 3 = 26.74g
How many Chorine atoms should bond with one Aluminum atom?
Answer:
three chlorine atoms
Explanation:
Which of these travels fastest in vacuum?
A. sound
B. water
C. air
D. light
thanks xx
Answer:
d, light waves!
Explanation:
A reptile egg is shown in the diagram.
Y
Which best describes the function of the structure
labeled Y?
O food source
O protection
waste collection
gas exchange
HELP
Answer:Its D
Explanation:
Trust
Answer:
food source
Explanation:
Got 100%
4. The type of thermal energy transfer that heats our homes is called
Answer:
conduction is the answer
1. Calculate the mass (in grams) of 6.15 moles of the following:
a) P4010
b) AgC2H302
c) Fe(CN)
a. 2683.168 g
b. 2683.168 g
c. 663.468 g
Further explanationGiven
Compounds
Required
The mass
Solution
Mass = mol x MW
a) P4010 (MW=283.9 g mol−1)
mass = 6.15 x 283.9 g mol−1
mass = 1745.985 g
b) AgC2H302 (MW=436.2875 g/mol)
mass = 6.15 x 436.2875 g/mol
mass = 2683.168 g
c) Fe(CN)2 (MW=107.881 g/mol)
mass = 6.15 x 107.881 g/mol
mass = 663.468 g
Fill in the blank. Elements in group 17 of the periodic table get more reactive as you go ___ the group.
Answer:
down the group
Explanation:
Is water wet? This is a discussion for easy points so I suggest you answer it.
Answer:
Water isn't wet by itself but it makes other materials wet. Like paper, clothes, shoes, etc.
Explanation:
How can you increase an object's kinetic energy?
pls helppp
37.9 grams of unknown substance undergoes a temperature increase of 25.0°C after absorbing 989 J. What is the specific heat of the substance?
The specific heat of the substance : c = 1.044 J/g °C J/g °C
Further explanationGiven
Heat absorbed by substance = 989 J
m = mass = 37.9 g
Δt = Temperature difference : 25 °C
Required
The specific heat
Solution
Heat can be formulated
Q = m.c.Δt
Input the value :
989 = 37.9 x c x 25
c = 989 : (37.9 x 25)
c = 1.044 J/g °C
define the term "filtration"
Answer:
the action or process of filtering something. hope this helps :D
A small portion of the periodic table of the elements is reproduced here showing eight elements and the groups to which they belong.
Based on its position on the periodic table, which column of elements would be most likely to chemically combine with lithium in 2:1 ratio?
it is 2.1 that it is his w ga hshshwu