Answer:
0.01185M = moles/0.02755L
0.02755*0.01185=0.00032647
Explanation:
Which of the following a true statement about igneous rocks?
A: Igneous rocks are only formed under a lot of heat and pressure. Some igneous rocks are formed below the surface others in oceans.
B: The properties of igneous rocks depend on the location in which they are formed.
C: Wind and water erosion can create igneous rocks.
Answer:
i think the answer is A....
Explanation:
Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.
Benzoic acid is a white crystalline powder used as a food preservative the compound contains 68.8% carbon, 5.0% hydrogen and 26.2% oxygen by mass what is the empirical formula
Name an example of a molecule
Answer:
N2 (nitrogen) O3 (ozone) CaO (calcium oxide) C6H12O6 (glucose, a type of sugar)
Answer:
dihydrogen monoxide
dinitrogen monosulfide
What are the reactants in the following reaction?
2FeS + 302 → 2FeO + 2502
iron (II) sulfide and oxygen
iron (II) sulfide and iron (II) oxide
oxygen and sulfur dioxide
iron (11) oxide and sulfur dioxide
Answer:
Iron (II) sulfide and oxygen
Which of the following organisms carry out photosynthesis?
Which of the following do omnivores eat?
A. only
B. plants and meat
C. meat only
D. they make their own food
Answer:
(B. Plants and meat)
Explanation:
10-14 is smaller than 107
Answer:
it is true because if you subtract 10 - 14 you will get -4 so it is less than 107.
Explanation:
Hope this helps!
You dissolve 0.47 g of potassium chloride (KCl) in 700 ml of water.
What is the molarity of the solution?
(From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g)
Enter the value rounded to three decimal places with no units
Will give BRAINLEst
Answer:
0.009
Explanation:
Molarity, a measure of molar concentration of a substance is calculated thus;
Molarity = number of moles ÷ volume
According to the provided information, mass of KCl = 0.47g, volume of water = 700ml
Using mole = mass/molar mass
Molar Mass of KCl = 39.10 + 35.453
= 74.553g/mol
Mole = 0.47/74.55
Mole = 0.0063mol
Volume of water = 700ml = 700/1000 = 0.7L
Molarity = 0.006/0.7
Molarity = 0.00857
The value of molarity rounded to three decimal places (3 d.p) = 0.009
The diameter of a red blood cell is about 3 × 10−4 in. What is its diameter in centimeters?
Answer:
1 in. =2.54 cm
3*(10^-4)*2.54=7.62*10^-4
Explanation:
When a metal reacts with oxygen gas what is the product formed
Answer:
Metal + Oxygen -> Metal Oxide
Explanation:
It's pretty self-explanatory. However, let me show you an example:
Iron + Oxygen -> Iron Oxide
Iron rusts. When iron rusts, it comes in contact with air to form Iron Oxide, which is rust itself.
Given the following equation formats, which form matches a single replacement
reaction?
O AB + CD → AD + CB
O A+B → AB
O A + BC → AC + B
O AB → A+B
Answer:
The answer is c. A + BC → AC + B
3. Consider the reaction of methane, CH4, burning in the presence of oxygen at constant pressure. Given the following equation, how much heat could be obtained by the combustion of 8.0 grams CH4? Given the thermochemical equation: CH4(g)+2O2→CO2(g)+2H2O(l); ΔH0=890.3kJ;
Answer: 445.15 kJ of heat could be obtained by the combustion of 8.0 grams [tex]CH_4[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} CH_4=\frac{8.0g}{16.04g/mol}=0.50moles[/tex]
The given thermochemical equation is:
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex] [tex]\Delta H=890.3kJ[/tex]
According to stoichiometry :
1 mole of [tex]CH_4[/tex] on combustion produce heat = 890.3 kJ
Thus 0.50 moles of [tex]CH_4[/tex] on combustion produce heat =[tex]\frac{890.3}{1}\times 0.50=445.15kJ[/tex]
Thus 445.15 kJ of heat could be obtained by the combustion of 8.0 grams [tex]CH_4[/tex]
_Na+ Cl2 - -> _NaCl
A 2,4
B 1,2
C 3,3
D 2,2
Answer:
D 2,2
Explanation:
We can see that there are 2 chlorines on the reactant side so there has to be a 2 on the product side
Now we have Na + Cl2 --> 2NaCl
The problem now is that there are 2 sodiums on the product side so add a 2 to the Na on the reactant side
2Na + Cl2 --> 2NaCl
Now it's balanced!
Weather is caused by the:
mesosphere
stratosphere
troposphere
thermosphere
I WILL MARK BRAINLIST
How is conservation of mass illustrated in this simulation? Explain your answer.
Answer:
Do part by part
Explanation:
How many moles of F are in 8.25 grams of F?
0.434 mol F
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TablesMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 8.25 g F
[Solve] moles F
Step 2: Identify Conversions
[PT] Molar Mass of F - 19.00 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 8.25 \ g \ F(\frac{1 \ mol \ F}{19.00 \ g \ F})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 0.434211 \ mol \ F[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.434211 mol F ≈ 0.434 mol F
Which of the following statements about maintaining a fitness program is ture?
Answer:
im sorry but you havent posted the pic
Explanation:
which part of the red blood cells can you find hemoglobin
Answer:
The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood. Each human red blood cell contains approximately 270 million of these hemoglobin molecules.
Explanation:
hope this helps(;
3. Calculate the energy in joules) of a photon with a wavelength of 3.66 X 104 hm (Infrared region) (Hint: Use Planck's equation)
104.3 x 10")
104.3 x 10-21,
1.043 X 1033
5.43 x 10 21
Answer:
5.43×10¯³² J
Explanation:
From the question given above, the following data were obtained:
Wavelength (λ) = 3.66×10⁴ hm
Energy (E) =?
Next, we shall convert 3.66×10⁴ hm to metre (m). This can be obtained as follow:
1 hm = 100 m
Therefore,
3.66×10⁴ hm = 3.66×10⁴ hm × 100 m / 1 hm
3.66×10⁴ hm = 3.66×10⁶ m
Next, we shall determine the frequency of the frequency of the photon. This can be obtained as follow:
Wavelength (λ) = 3.66×10⁶ m
Velocity (v) = 3×10⁸ m/s
Frequency (f) =?
v = λf
3×10⁸ = 3.66×10⁶ × f
Divide both side by 3.66×10⁶
f = 3×10⁸ / 3.66×10⁶
f = 81.97 Hz
Finally, we shall determine the energy of the photon. This can be obtained as follow:
Frequency (f) = 81.97 Hz
Planck's constant (h) = 6.63×10¯³⁴ Js
Energy (E) =?
E = hf
E = 6.63×10¯³⁴ × 81.97
E = 5.43×10¯³² J
Therefore, the energy of the photon is 5.43×10¯³² J
The density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 18.2 g of CO2 according to the following chemical equation?
C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l)
Answer: 12.1 ml of ethanol is needed
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} CO_2=\frac{18.2g}{44g/mol}=0.414moles[/tex]
[tex]C_2H_5OH(l)+3O_2(g)\rightarrow 2CO_2(g)+3H_2O(l)[/tex]
According to stoichiometry :
2 moles of [tex]CO_2[/tex] is produced by = 1 mole of [tex]C_2H_5OH[/tex]
Thus 0.414 moles of [tex]CO_2[/tex] is produced by=[tex]\frac{1}{2}\times 0.414=0.207moles[/tex] of [tex]C_2H_5OH[/tex]
Mass of [tex]C_2H_5OH=moles\times {\text {Molar mass}}=0.207moles\times 46.07g/mol=9.54g[/tex]
Volume of ethanol = [tex]\frac{\text {Mass of ethanol}}{\text {density of ethanol}}=\frac{9.54g}{0.789g/ml}=12.1ml[/tex]
12.1 ml of ethanol is needed to produce 18.2 g of [tex]CO_2[/tex]
How many grams are in 7.32 x 1023 molecules of potassium carbonate (K2CO3)?
(I leave off the x10^23 because they both will divide out) Use your per
What is occurring with the velocity between points D and E?
A velocity is decreasing
B. velocity is increasing
C. velocity is constant
D. velocity is zero
Answer:
a
Explanation:
the line is going down
To determine the highest angle the pendulum will swing to after the impact, we can apply the principle of conservation of momentum. Initially, the total momentum is zero since the pendulum is at rest.
After the impact, the total momentum remains zero because the block and embedded projectile move together as a single system.First, let's convert the weight units to a common system. The 5-pound rod is approximately 2.27 kg, and the 10-pound wooden block is around 4.54 kg. The projectile's weight is 0.3 oz, which is about 0.0085 kg.The momentum before the impact is zero, so the momentum after the impact must also be zero. This can be expressed as:(2.27 kg + 4.54 kg + 0.0085 kg) * V_final = 0Solving for V_final gives us V_final ≈ 0 ft/s. Since the velocity is zero after the impact, the pendulum will momentarily stop at its highest point.Therefore, the highest angle the pendulum will swing to after the impact is 0 degrees, or it will come to rest at the vertical position.
Learn more about momentum here :
https://brainly.com/question/30677308
#SPJ11
Which yield comes from measurements obtained during a real experiment?
A) actual yield
B) theoretical yield
C) percent yield
Answer:
A) actual yield
Explanation:
Theoretical yield is the amount of product expected based on the stoichiomety.
Percent yield is the actual yield over the theoretical yield.
What number will go in the _?_ below to balance the equation?
3Gr3V2 + O3 --> 3GrO + __?__V
Question 1 options:
A. 1
B. 2
C. 3
D. 4
E. 5
F. 6
G. 9
Answer:
Option F 6 will be the answer.
What is the mass in grams of 1.00 x 10^12 lead (Pb)
atoms?
3.44 × 10⁻¹⁰ g Pb
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.00 × 10¹² atoms Pb
[Solve] grams Pb
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of Pb - 207.2 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.00 \cdot 10^{12} \ atoms \ Pb(\frac{1 \ mol \ Pb}{6.022 \cdot 10^{23} \ atoms \ Pb})(\frac{207.2 \ g \ Pb}{1 \ mol \ Pb})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 3.44072 \cdot 10^{-10} \ g \ Pb[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
3.44072 × 10⁻¹⁰ g Pb ≈ 3.44 × 10⁻¹⁰ g Pb
Answer:
[tex]\boxed {\boxed {\sf 3.44 *10^{-10} \ g \ Pb}}[/tex]
Explanation:
1. Atoms to Moles
Use Avogadro's Number to convert atoms to moles. This number: 6.022*10²³, tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, the particles are atoms of lead.
[tex]\frac {6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}[/tex]
Multiply by the given number of atoms.
[tex]1.00 *10^{12} \ atoms \ Pb *\frac {6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}[/tex]
Flip the fraction so the atoms of lead cancel.
[tex]1.00 *10^{12} \ atoms \ Pb *\frac {1 \ mol \ Pb}{6.022*10^{23} \ atoms \ Pb}[/tex]
[tex]1.00 *10^{12}*\frac {1 \ mol \ Pb}{6.022*10^{23}}[/tex]
[tex]\frac {1.00 *10^{12}\ mol \ Pb}{6.022*10^{23}} = 1.66057788*10^{-12} \ mol \ Pb[/tex]
2. Moles to Grams
Use the molar mass to convert moles to grams. This can be found on the Periodic Table. For lead it is 207.2 grams per mole.
[tex]\frac {207.2 \ g\ Pb}{ 1 \ mol \ Pb}[/tex]
Multiply by the number of moles we calculated.
[tex]1.66057788*10^{-12} \ mol \ Pb* \frac {207.2 \ g\ Pb}{ 1 \ mol \ Pb}[/tex]
[tex]1.66057788*10^{-12}* \frac {207.2 \ g\ Pb}{ 1 }[/tex]
[tex]1.66057788*10^{-12}* {207.2 \ g\ Pb}= 3.44071737*10^{-10} \ g \ Pb[/tex]
3. Round
The original measurement of atoms has 3 significant figures, so our answer must have the same. For the number we calculated, it is the hundredth place. The 0 in the thousandth place tells us to leave the 4.
[tex]3.44 *10^{-10} \ g \ Pb[/tex]
When gases are treated as real, via use of the van der Waals equation, the actual volume occupied by gas molecules ________ the pressure exerted and the attractive forces between gas molecules ________ the pressure exerted, as compared to an ideal gas.
decreases, increases
does not affect, decreases
increases, decreases
does not affect, increases
increases, increases
Answer:
Increases, decreases
Explanation:
make a prediction about the relationship between electrons and molecular shapes
Answer:
★ Molecular geometry is described by VSEPR theory, which basically states that electron pairs around a central atom will repel each other, and get as far apart as possible, in three dimensions.
Explanation:
Hope you have a great day :)
Chemical formula of copper (II) nitrate
Calculate the mass of chromium produced from 50g of Cr2O3.
Answer: 34 gram of chromium produced from 50g of [tex]Cr_2O_3[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Cr_2O_3=\frac{50g}{152g/mol}=0.33moles[/tex]
The decomposition of [tex]Cr_2O_3[/tex] follows the equation :
[tex]2Cr_2O_3\rightarrow 4Cr+3O_2[/tex]
According to stoichiometry :
2 moles of [tex]Cr_2O_3[/tex] produce = 4 moles of [tex]Cr[/tex]
Thus 0.33 moles of [tex]Cr_2O_3[/tex] will produce=[tex]\frac{4}{2}\times 0.33=0.66moles[/tex] of [tex]Cr[/tex]
Mass of [tex]Cr=moles\times {\text {Molar mass}}=0.66moles\times 52g/mol=34g[/tex]
Thus 34 gram of chromium produced from 50g of [tex]Cr_2O_3[/tex]
How many grams are in 6.60 moles of ZnO?
Answer:
6.60 moles of ZnO have 537,108 g.
Explanation: