The mass of carbon in a sample of the compound is 1.46 g
What is the percent mass of Carbon in the sample of he compound?The percent mass of Carbon in the sample of he compound is calculated as follows:
Percent mass = mass of carbo/mass of sample * 10%Mass of sample of compound = 8.07 g
Mass of H = 0.299 g
Mass of N = 4.18 g
mass of carbon = 8.07 g - 0.299 g - 4.18 g
Mass of carbon = 3.591 g
Percent mass of carbon = 3.591/8.07 * 100%
Percent mass of carbon = 44.5 %
Therefore, mass of carbon in a sample of the compound with a mass of 3.28 g = 3.28 g * 44.5%
mass of carbon in a sample of the compound = 1.46 g
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Steve races to the nearest taco stand at lunchtime and sees that his pedometer recorded his peak speed at 91.1 cm/s. What was Steve's peak speed in kilometers per hour?
The answer will be 3,279 km/hr.
Pedometer is a device used to measure the number of steps covered by a person.
Pedometer sensor = Step count and IMS sensor used.
Peak Speed rate recorded in the pedometer = 91.1 cm/s
1 Km = 100 * 1000 cm
1 hour = 60 * 60 = 3600 sec
Now, 1 cm = 10^-5 km
1 sec = 0.00027777777 hour
speed = 91.1 cm /s = 91.1 * 10^-5 / 0.00027777777 km/hour
speed = 3.279 km/hr
Steve's peak speed rate in km / hr would be 3.279 km/hr
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If you have a solution of 3M HCl in water, how much solute in grams is there in 250 mL?
Answer:
27.3 g HCl
Explanation:
**Be sure to arrange the conversion in a way that allows for the cancellation of units.
(Step 1)
Convert milliliters (mL) to liters (L).
1,000 mL = 1 L
250 mL 1 L
--------------- x ----------------- = 0.25 L
1,000 mL
(Step 2)
Use the molarity ratio to find the moles of HCl.
Molarity = moles / L
3 M = moles / 0.25 L
0.75 = moles
(Step 3)
Convert moles to grams using the molar mass of HCl.
Molar Mass (HCl): 1.008 g/mol + 35.453 g/mol
Molar Mass (HCl): 36.461 g/mol
0.75 moles HCl 36.461 g
-------------------------- x -------------------- = 27.3 g HCl
1 mole
Question 1 of 10
Which of the following is a testable hypothesis?
A. Green toothpaste tastes better than blue toothpaste or red
toothpaste.
B. It's wrong to not brush your teeth before you have an important
conversation with someone.
C. Smart, careful, healthy people always brush their teeth.
D. If I brush my teeth, I will get fewer cavities than if I don't brush my
teeth.
Answer:
D. If I brush my teeth, I will get fewer cavities than if I don't brush my
teeth.
Explanation:
How did Katya echazarreta make history in the science community
Answer:She became one of the six space tourists transported by Blue Origin's New Shepard spacecraft, proving that there is room in the universe for all those who strive to reach it. The ten-minute trip marked the fifth successful manned mission for Jeff Bezos' company, but the feat of a lifetime for Echazarreta.
Explanation:
Calculate the price of energy ($/GJ) obtained from burning hydrogen, that is a product
of
CH3OH + ΔH0 → CO + H2 ,
and:
methanol density at 20C = 0.791 g/ml,
methanol molecular weight = 32.04 g/mol,
price of 100% methanol = $38/ml.
Assume that methanol thermal decomposition utilizes energy from electricity ($33/GJ)
The calculated answer is 96.7
In the chemical process of combustion, an object quickly combines with oxygen to produce heat. The original substance is referred to as the fuel, and the oxygen's source as the oxidizer. Although it is typically a liquid for airplane propulsion, the fuel can be a solid, liquid, or gas.
In an air-burning flame of pure hydrogen, hydrogen (H2) combines with oxygen (O2) to generate water (H2O), releasing energy in the process. Instead of producing pure oxygen, hydrogen combustion in ambient air can occasionally produce a tiny amount of nitrogen oxides along with the water vapor. Hydrogen can be utilized as a fuel thanks to the energy emitted.
Methanol burns in the following way: CH3OH(l)+ 23O2(g)21CO2(g)+2H2O (l)
G= [G f CO2 (g)+2 G f H2O(l)] reaction
[Gf CH3OH(l)+23Gf O2 (g)]
[−394.36+2(−237.13)]
− [−166.27+0]
=−702.35kJmol−1
How well Gibbs free energy is converted into meaningful labor
= "H reaction," "G reaction," and "100."
= −702.35×100/−726
=96.7
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The compound known as butylated hydroxytoluene, abbreviated as BHT, contains carbon, hydrogen, and oxygen. A 2.876 g
sample of BHT was combusted in an oxygen rich environment to produce 8.616 g of CO₂(g) and 2.821 g of H₂O(g).
Insert subscripts to complete the empirical formula of BHT.
Answer:15
Explanation:
Learning Task No. 2: Study the diagram above. Answer the guide questions.
Guide Questions:
1. What do you call the force acting on the ball along the horizontal line or
along the force that makes the ball in motion?
2. What makes the ball stop on rolling after sometime?
3. What makes the ball keep on rolling?
1. "Fn" stands for "Normal Force," "Fg" for "Gravity Force," "Ff" for "Force Friction," and "A" for "Applied Force." 2. As a result of the friction, which causes the ball to stop. 3. The reason the ball rolls is due to the force that is imparted to it.
The definition of force is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A force that opposes this motion of the hands is activated when they brush against one another. Frictional force is the force resisting motion applied in the direction perpendicular to the direction of motion of the hands.
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The doctor orders 525 mg of a medication to be administered every 12 hours. The
medication comes in 150 mg scored tablets. How many tablets need to be administered
to the patient in one day?
Answer: 7 pills
Explanation:
A day is 24 hours so you multiply 12 x 2 and do the same to 525, 525 x 2 = 1050
then divide 1050 by 150 and you get 7
What is the molar mass of H₂CO3?
A. 61 g/mol
B. 62 g/mol
C. 30 g/mol
D. 29 g/mol
Answer:
ans is b 62 g/mole
because mass of h is 2 an carbon is 12 and 3 atoms of oxygen in 16*3 =48 adding all we get 62 g/mole
When 53 J of heat is added to 15 g of a liquid, its temperature rises from 10.7 °C to
13.0°C.
What is the heat capacity of the liquid?
The heat capacity of liquid is 1.53 J/ g°C
Heat capacity measures the energy required to raise temperature of a unit mass of a substance by a unit degree
Formula used:
Q = m × c × ΔT
= m × c × ( T₂ - T₁ )
where,
Q = Amount of heat gained or lost = 53 J
m = mass of liquid = 15 g
c = specific heat of liquid = ?
ΔT = change in temperature
T₁ = initial temperature = 10.7 °C
T₂ = final temperature = 13 °C
Substituting the values in the formula
53 J = 15 g × c × ( 13 - 10.7) °C
53 J = 15 g × c × 2.3 °C
c = 53/ ( 15 × 2.3 )
= 1.53 J/ g°C
Thus we can conclude that the heat capacity of liquid is 1.53 J/ g°C
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The world's record for the largest cup of coffee was broken on
October 15. 2010. with a 2010-gal cup of coffee in Las Vegas, Ive
vada. If a cup of coffee contains 473 mL of coffee, how many
cups of coffee would be reauired to till this coffee cup
The number of cups of coffee in a 2010-gal cup of coffee is 16086 cups of coffee
What is the number of cups of coffee in a 2010-gal cup of coffee?The number of cups of coffee in a 2010-gal cup of coffee is calculated as follows:
Number of cups of coffee = volume of 2010-gal in ml/473 ml
Volume of large cup of coffee = 2010-gal
Number of mL in 1 gal = 3785.41 mL
2010 gal in mL = 2010 * 3785.41
2010 gal in mL = 7608674.1 mL
Number of cups of coffee = 7608674.1 mL/473 mL
Number of cups of coffee = 16086 cups of coffee
In conclusion, the number of cups pf coffee in 2010 gal is obtained using the conversion factor between gal and mL
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calculate the moles of NaCl in 5.67 grams of NaCl?
Answer:
0.0970 moles NaCl
Explanation:
To find the amount of moles, you need to multiply the mass (grams) by the molar mass of NaCl. The molar mass exists as a ratio that compares the mass of a substance per every 1 mole. The molar mass is made up of the individual atomic masses of every element in the molecule. The final answer should have 3 sig figs like the given value (5.67 = 3 sig figs).
Atomic Mass (Na): 22.770 g/mol
Atomic Mass (Cl): 35.453 g/mol
Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol
Molar Mass (NaCl): 58.443 g/mol
5.67 grams NaCl 1 mole
---------------------------- x ------------------------- = 0.0970 moles NaCl
58.443 grams
Why is CrO named using a roman numeral, chromium (II) oxide, whereas CaOis named without a roman numeral in the name, calcium oxide?
Answer: Cr (chromium) has multiple oxidation states, while Ca (calcium) only has one.
Explanation: You only specify with a Roman numeral when the metal/positively charged ion in the compound has multiple charges. Chromium is a transition metal, and most transition metals have multiple charges. Calcium is a group 2 metal so it will only have a charge of +2.
the reaction of -COOH and -NH₂:
a) forms urea
b) creates a peptide bond
c) forms glycogen
d) forms a ketone body
The reaction of -COOH and -NH₂ creates a peptide bond.
What is peptide bond?Peptide bond is defined as a type of amide type covalent chemical bond which is formed between the two simultaneous molecules of amino acid in such a way that carboxyl group of one molecule of amino acid get attached to the NH₂ group of another molecules of Amino acid.
Formation of Peptide bondPeptide bond is formed by the elimination of water molecules.
The hydroxyl group from the carboxyl and proton hydrogen cation from NH₂ group.
Thus, we concluded that the reaction of -COOH and -NH₂ creates a peptide bond by losing—OH from the -COOH and H+ from the -NH₂.
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What element completes the 7s sub level?
Answer:
Radium
Explanation:
A tuna swam at a constant velocity of 1.2 meters per second toward a smaller fish. If the tuna swam toward the smaller fish for 7.0 seconds, how far did the tuna swim?
Write your answer to the tenths place!!!!
The tuna fish that swam at a constant velocity of 1.2 meters per second toward a smaller fish in 7 seconds swam 8.4m.
How to calculate distance?The distance moved by a moving body can be calculated by multiplying the speed by the time taken as follows:
Distance = speed × time
According to this question, a tuna swam at a constant velocity of 1.2 meters per second toward a smaller fish. If the tuna swam toward the smaller fish for 7.0 seconds, the distance is calculated as follows:
Distance = 1.2m/s × 7s
Distance = 8.4m
Therefore, the tuna fish that swam at a constant velocity of 1.2 meters per second toward a smaller fish in 7 seconds swam 8.4m.
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Answer:
i think u have to mutiply but i might be confused
i think the answer is 8.4 im not sure tho
Explanation:
Zn(s) + 2HCl(aq) > H2(g) + ZnCl2 (aq)
When 25.0 g of Zn reacts, how many grams of ZnCl2 are produced?
A. 1.5 B. 0.59 C. 104 D. 25 E. 52
Taking into account the reaction stoichiometry, the correct answer is option E. when 25.0 g of Zn reacts, 52 grams of ZnCl₂ are produced.
Reaction stoichiometryIn first place, the balanced reaction is:
Zn + 2 HCl → H₂ + ZnCl₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Zn: 1 moleHCl: 2 molesH₂: 1 moleZnCl₂: 1 moleThe molar mass of the compounds is:
Zn: 65.37 g/moleHCl: 36.45 g/moleH₂: 2 g/moleZnCl₂: 136.27 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Zn: 1 mole ×65.37 g/mole= 65.37 gramsHCl: 2 moles ×36.45 g/mole= 72.9 gramsH₂: 1 mole ×2 g/mole= 2 gramsZnCl₂: 1 mole ×136.27 g/mole= 136.27 gramsMass of ZnCl₂ formedThe following rule of three can be applied: if by reaction stoichiometry 63.37 grams of Zn form 136.27 grams of ZnCl₂, 25 grams of Zn form how much mass of ZnCl₂?
mass of ZnCl₂= (25 grams of Zn× 136.27 grams of ZnCl₂)÷ 63.37 grams of Zn
mass of ZnCl₂= 53.76 grams
This mass can be considered approximately equal to 52 grams. Finally, the correct answer is option E. when 25.0 g of Zn reacts, 52 grams of ZnCl₂ are produced.
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Calculate the mass of aluminium that can be formed from
1020 g of aluminium oxide. 2Al203–>4Al+3o2
Answer:
see the step by step answer is up
The diagrams suggest that compounds must be
The diagrams of a chemical compound give an idea of the structure and composition of the compound.
What is a diagrammatic representation?
Because a molecular formula often does not accurately describe a single molecule, structural formulae must be created for organic compounds. Isomers are different compounds with the same chemical formula, and the abundance of organic isomers is a reflection of carbon's exceptional plasticity in creating stable bonds with both other elements and itself.
We refer to such compounds as constitutional isomers when the atoms that make up the molecules of various isomers are linked together in fundamentally different ways. The formulae share a similar structural element and represent all known and hypothetical C4H10O compounds. No double or triple bonds and no rings exist in any of these structures.
Therefore, the diagrams of a chemical compound give an idea of the compound.
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