Which question about plants can be answered scientifically by classifying?
OA. Which kind of flower smells the best?
OB. What does a plant need in order to survive?
OC. What kinds of animals like to eat dandelion plants?,
OD. Is an oak tree a plant?
Answers
The question about plants can be answered scientifically by classifying is What kinds of animals like to eat dandelion plants? Therefore, option C is correct.
What kinds of animals like to eat dandelion plants?Many songbirds consume dandelion seeds, including chipping, field, house, song, and white-throated sparrows, American goldfinches, and indigo buntings. Bobwhite quail, wild turkeys, ruffed grouse, rabbits, white-tailed deer, and eastern chipmunks all consume dandelions.
They are one of the first food sources for bees, butterflies, moths, flies, beetles, and other insects because they bloom early in the spring. Dandelion seeds are eaten by finches and sparrows.
Thus, option C is correct.
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Related Questions
What is unique about the size and location of this exoplanet?
Answers
Answer:
It is the smallest planet found in the habitable zone.
Explanation:
A weather balloon holds 2,000 cubic meters of helium. The density of helium is 0. 1765 kilograms per cubic meter. How many kilograms of helium does the balloon contain? Only enter a numerical value in the answer blank.
Answers
Answer:
353kg
Explanation:
2000 x 0.1765 = 353kg
for every 1 cubic metre of helium there is 0.1765 kg of it
the balloon is holding 2,000 cubic metres of the helium.
That means that there are 2000 times of 0.1765kg of helium in the balloon
so you times 0.1765kg by 2000
Identify the gas law that applies to the following scenario: A 36.5 liter balloon holding 2.9 moles of carbon dioxide leaks. If we are able to determine that 1.2
moles of carbon dioxide escaped before the container could be sealed, what is the new volume of the container?
O Boyle's Law
O Charles' Law
O Gay-Lussac's Law
Avogadro's Law
Answers
Answer:
Avogadro's Law; 15.1L
Explanation:
Boyle's Law- Pressure and volume are inversely related, so an increase in pressure= decrease in volume. We see this in the equation P1V1=P2V2.
Charle's Law- Gas expands/increases in volume when temperature increases, so they are proportional. We see this in the formula \(\frac{V1}{T1} = \frac{V2}{T2}\).
Guy-Lussac's Law- As temperature increases, pressure increases, so they are proportional. We see this in the formula \(\frac{P1}{T1} = \frac{P2}{T2}\).
Avogadro's Law- There are equal amount of volume have an equal amount of moles, so they are proportional. We see this in the formula \(\frac{V1}{n1} = \frac{V2}{n2}\).
Plugging in the values based on Avogadro's Law, we'll have:
\(\frac{36.5}{2.9} = \frac{V2}{1.2}\)
12.6 = \(\frac{V2}{1.2}\)
12.6 x 1.2 = V2
15.1L =V2
What mass of H2 forms when
35.25 g of Al reacts with excess
hydrochloric acid?
2AI+ 6HCI→ 2AlCl3 + 3H₂
Al: 26.98 g/mol
H₂: 2.02 g/mol
[?] g H₂
Answers
35.25/26.98 (mass reacted/molar mass of Al)
2) Find number of moles of H2 produced:
Number of mol. of Al x 3/2 (based on stoichiometry)
3) Find mass of H2 formed:
Number of mol. of H2 x molar mass of H2 = 3.9588mol = 4 mol (estimated value)
Redox Ex
20. Which reaction is an example of oxidation-reduction?
1) KOH + HCl → KCl + H₂O
2) 2 KCl → 2 K + Cl2
3) BaCl2 + K2SO4 → 2 KCl + BaSO4
4) KCl + AgNO3 → AgCl + KNO3
Answers
Answer: 2 KCl → 2 K + Cl2
Explanation:
An oxidation-reduction (or redox) reaction involves a transfer of electrons from one species to another. In this type of reaction, one species undergoes oxidation (loses electrons) while another species undergoes reduction (gains electrons).
Looking at the provided options, the reaction that represents an oxidation-reduction process is:
2) 2 KCl → 2 K + Cl2
In this reaction, potassium (K) is being reduced (gaining electrons to form neutral K atoms) and chlorine (Cl) is being oxidized (losing electrons to form Cl2).
71.1 mL of 0.695M rubidium hydroxide neutralized 89.7mL of sulfuric acid and solution of unknown concentration. Find the concentration of the acid
Answers
Answer: Concentration of the acid is 0.551 M.
Explanation:
Given: \(V_{1}\) = 71.1 mL, \(M_{1}\) = 0.695 M
\(V_{2}\) = 89.7 mL, \(M_{2}\) = ?
Formula used to calculate the concentration of acid is as follows.
\(M_{1}V_{1} = M_{2}V_{2}\)
Substitute the values into above formula as follows.
\(M_{1}V_{1} = M_{2}V_{2}\\0.695 \times 71.1 mL = M_{2} \times 89.7 mL\\M_{2} = 0.551 M\)
Thus, we can conclude that concentration of the acid is 0.551 M.
Sodium chloride is NaCl, and zinc chloride ZnCl₂. Why are there more chloride ions in the zinc compound?
Answers
Answer:
Zinc chloride (ZnCl2) has more chloride ions compared to sodium chloride (NaCl) because the zinc ion has a +2 charge, while the sodium ion has a +1 charge.
Chlorine (Cl) is a halogen element with a -1 charge when it gains an electron to form an ion. To form a neutral compound, the number of positive and negative charges must be balanced.
In NaCl, the sodium ion has a +1 charge and can only bond with one negatively charged chloride ion, which has a -1 charge. Therefore, the formula for sodium chloride is NaCl, with one sodium ion and one chloride ion.
In ZnCl2, the zinc ion has a +2 charge, and it requires two negatively charged chloride ions, each with a -1 charge, to form a neutral compound. Therefore, the formula for zinc chloride is ZnCl2, with one zinc ion and two chloride ions.
Thus, the reason why there are more chloride ions in the zinc compound is because the zinc ion has a higher charge compared to the sodium ion, and it requires two chloride ions to balance its charge, whereas sodium ion requires only one chloride ion.
what is the concentration in molarity of lithium hydroxide prepared by dissolving 48.0 grams 48.0 grams of solid in sufficient water to make 250 ml 250 ml of solution?
Answers
the concentration of lithium hydroxide in molarity was 8M
what are the properties of lithium hydroxide?
A transparent to water-white liquid with a possible strong odour is what lithium hydroxide solution looks like. Skin, eyes, and mucous membranes may have very irritating contact reactions. Through consumption, inhalation, or skin absorption, it may be harmful. Other compounds are created using it.
Given,
weight =48 g
No. of moles =2448=2 moles
volume =250mL
Molarity Volume (in L)No. of moles=0.25L2=8M
=8M
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what is the mass in grams of 0.00125 mole of sodium Na=23
Answers
Answer:
0.03g
Explanation:
Given parameters:
Number of moles of Na = 0.00125mole
Unknown:
Mass in grams of Na = ?
Solution:
To find the mass of this substance, we simply multiply the number of moles with the given molar mass of Na.
Mass of Na = number of moles x molar mass
Mass of Na = 0.00125 x 23 = 0.03g
a voltaic cell is constructed with a cu/cu2 half-cell and an ni/ni2 half-cell. the nickel electrode is negative. write both balanced half-reactions and the overall reaction. recall that states of matter are not included for electrons transferred in the reaction but be sure to include states of matter for the other materials in your reaction statement. reduction half-reaction: oxidation half-reaction: overall reaction:
Answers
Oxidation half-reaction on the nickel anode: Ni → Ni²⁺ + 2e⁻
Reduction half-reaction on the copper cathode: Cu²⁺ + 2e⁻ → Cu
Overall reaction: Ni + Cu²⁺ → Ni²⁺ + Cu
Voltaic cell (galvanic cell or electrochemical cell) is generating electrical energy from chemical reactions.
In this voltaic cell, nickel (Ni) and nickel cations from one half-cell lose electrons (oxidation) to the species from the other half-cell, copper (Cu) and copper cations who gain electrons (reduction).
Copper (solid state) is forming from the solution (aq) and nickel dissolves from solid state (s) to the solution (see the picture below).
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Consider the balanced equation:
3Mg(OH)2 + 2H3PO4 Mg3(PO4)2 + 6H20
If you have 3 moles of Mg(OH)2, how many moles of water will be produced?
A
2
B
3
6
D
1
Answers
Answer:
A). 3 Mg, 2 P, 14 O, 12 H
Explanation:
Mass and energy are conserved:
Question 3 options:
A)
only in physical changes.
B)
in chemical changes and physical changes.
C)
always in physical changes and sometimes in chemical changes.
D)
only in chemical changes.
Answers
What element is this atom?
(Urgent plz help)
Answers
If 2.2 moles of calcium oxide are decomposed, how many moles of oxygen are produced?
2CaO --> 2Ca + O2
Answers
Answer: Since the reaction is 2Ca(NO3)2 = 2CaO + 4NO2 + O2
1) - given the stoichiometric coefficients, we know that 2 moles of Ca(NO3)2 will produce 4 moles of NO2, hence, 1 mole will produce 2 moles of NO2
2) - 328 g produces 22.4 L, since One mole of any gas at S.T.P. occupies the same volume which is 22.4 L.
Hence, 65.6 g produces (65.6*22.4)/328 = 4.48 L
3) - 328 g produces 112 g CaO. Therefore, 65.6 g produces = (65.6*112)/328 = 22.4 g CaO.
4) - Given the stoichiometric coefficients, we know 5 moles of gaseous products are already being produces ( 4+1) by 2 moles of reactant.
5) - 44.8 L at STP = 2 moles of NO2, since One mole of any gas at S.T.P. occupies the same volume which is 22.4 L.
Hence, to produce 2 moles of NO2, we need 1 mole of reactant = 164 g
Hope this helps :)
Explanation:
calculate the ml of 0.553 m hydrochloric acid needed to completely react with 85.0 g of a 5.00% lead (ii) nitrate solution. 2 hcl(aq) pb(no3)2(aq) --> pbcl2(s) 2 hno3(aq)
Answers
Approximately 46.0 mL of 0.553 M HCl is needed to completely react with 85.0 g of a 5.00% lead (II) nitrate solution.
To calculate the volume of 0.553 M hydrochloric acid (HCl) needed to react with 85.0 g of a 5.00% lead (II) nitrate (Pb(NO₃)₂) solution, we need to follow a series of steps:
Step 1: Calculate the amount of lead (II) nitrate (Pb(NO₃)₂) in the solution.
Given:
Mass of (Pb(NO₃)₂) solution = 85.0 g
Percentage concentration of (Pb(NO₃)₂) = 5.00%
First, we need to convert the percentage concentration to grams of (Pb(NO₃)₂):
Mass of (Pb(NO₃)₂) = (Percentage concentration / 100) x Mass of solution
Mass of (Pb(NO₃)₂) = (5.00 / 100) x 85.0 g
Mass of (Pb(NO₃)₂) = 4.25 g
Step 2: Calculate the number of moles of (Pb(NO₃)₂).
To do this, we need to divide the mass of (Pb(NO₃)₂) by its molar mass.
The molar mass of (Pb(NO₃)₂) = 207.2 g/mol (lead atomic mass: 207.2 g/mol, nitrogen atomic mass: 14.0 g/mol, oxygen atomic mass: 16.0 g/mol)
Number of moles of (Pb(NO₃)₂) = Mass of (Pb(NO₃)₂) / Molar mass of (Pb(NO₃)₂)
Number of moles of (Pb(NO₃)₂) = 4.25 g / 331.2 g/mol
Number of moles of (Pb(NO₃)₂) = 0.0128 mol
Step 3: Use the stoichiometry of the balanced chemical equation to determine the number of moles of HCl required.
From the balanced equation: 2 HCl(aq) + Pb(NO₃)₂ (aq) → PbCl₂(s) + 2 HNO₃(aq)
The stoichiometric ratio between Pb(NO₃)₂ and HCl is 1:2.
Number of moles of HCl = 2 x Number of moles of Pb(NO₃)₂
Number of moles of HCl = 2 x 0.0128 mol
Number of moles of HCl = 0.0256 mol
Step 4: Calculate the volume of 0.553 M HCl using the number of moles of HCl.
To find the volume of the HCl solution, we can use the formula:
Volume (L) = Number of moles / Concentration (M)
Volume of HCl = Number of moles of HCl / Concentration of HCl
Volume of HCl = 0.0256 mol / 0.553 mol/L
Volume of HCl = 0.046 L
Finally, convert the volume from liters to milliliters:
Volume of HCl = 0.046 L x 1000 mL/L
Volume of HCl = 46.0 mL
Therefore, approximately 46.0 mL of 0.553 M HCl is needed to completely react with 85.0 g of a 5.00% lead (II) nitrate solution.
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what questions should I expect on the Chemistry module 4 DBA?
(When I’m finished with the DBA I’ll answer this question but right now I need help)
Answers
Decomposition processes should appear here on Chemistry previous modules DBA, When I'm done with the DBA, I'll respond to this query.
How do you define reaction?Opposition or antagonism to a force, effect, or movement is a reactionary act, process, or occurrence. especially: a reaction to a particular treatment, circumstance, or stimulus; leaning toward a past and typically antiquated political or social system or policy.
What kinds of reactions are there?Combination, disintegration, single-replacement, twofold, and combustion are the five fundamental types of chemical reactions. You can classify a reaction into one of these groups by looking at the reactants and products.
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Answer: I was asked to classify equations, balance equations, and define + explain the law of conservation of mass
Question 6 of 10 What is the function of mitochondria? O
A. The mitochondria use sugars as fuel to produce energy.
B. The mitochondria direct the cell's activities and hold its DNA.
C. The mitochondria surround the cell and control which materials come into and out of the cell.
D. The mitochondria use sunlight to produce sugars. SUBE
Answers
Answer:
A. The mitochondria use sugars as fuel to produce energy.Explanation:
The most prominent function of mitochondria is to produce the energy currency of the cell, ATP (i.e., phosphorylation of ADP), through respiration and using sugar as fuel, and to regulate cellular metabolism .
It is defined as the number of particles per mole of a substance. *
a. Molar ratio
b. Mole
c. Avogrado's number
Answers
Answer:
Avogadro's number
Explanation:
Avogadro's number
defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.
why are some materials such as solids soluble in water, while other molecular solids such as petroleum are in soluable in water?
Answers
Hi! Solubility of materials in water depends on several factors, including polarity, intermolecular forces, and lattice energy. Here's an explanation with the terms you've requested:
1. Polarity: Water is a polar molecule, meaning it has a positive and negative end due to uneven distribution of electrons. Polar substances dissolve well in water (like dissolves like). Molecular solids with polar molecules will generally be soluble in water.
2. Intermolecular forces: There are various intermolecular forces, such as hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Solids with intermolecular forces that are compatible with water's polarity will dissolve more readily.
3. Lattice energy: Molecular solids have a lattice structure, and the energy required to break this lattice determines their solubility. If the energy gained from solvation (interaction with water molecules) is greater than the lattice energy, the solid will dissolve.
Petroleum is insoluble in water because it is nonpolar and mostly consists of hydrocarbon molecules. These molecules have weak London dispersion forces and are not attracted to water's polar nature. Consequently, petroleum doesn't dissolve in water.
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2014 Quantity Nuts 300 Meat 175 2015 Quantity Nuts 420 Meat 340 19 Using CPI what is the inflation rate from 2014 to 2015 if we assume 2014 is the base year? (enter your answer as a percentage and to 2 decimal places as needed) Price 9 19 Price 14
Answers
The inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.
The inflation rate from 2014 to 2015, assuming that 2014 is the base year, can be determined using the Consumer Price Index (CPI). The CPI measures the cost of goods and services over time and is used to calculate inflation. The formula for calculating inflation rate using CPI is as follows: Inflation rate = ((CPI year 2 - CPI year 1) / CPI year 1) x 100To solve this problem, we first need to calculate the CPI for each year using the prices and quantities of nuts and meat.
Calculating CPI for 2014:CPI 2014 = (300 x $9) + (175 x $19) = $5,625 Calculating CPI for 2015:CPI 2015 = (420 x $9) + (340 x $14) = $9,460Using the CPI formula, we can calculate the inflation rate from 2014 to 2015:Inflation rate = ((CPI 2015 - CPI 2014) / CPI 2014) x 100= (($9,460 - $5,625) / $5,625) x 100= $3,835 / $5,625 x 100= 68.09% (to 2 decimal places) Therefore, the inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.
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Why isn't the atomic mass of most of the elements on the Periodic Table an integer (not a decimal)?
Answers
Answer:
Atomic mass is never an integer number for several reasons
Which two factors can affect a solid solute solubility
A. Whether the particles of the solute and solvent are changed
B. Pressure acting on the solute
C. Length of time spent stirring
D. Temperatures of the solvent and solute
The subject is science
Answers
Answer:
A and D
Explanation:
it might seem like B and D but I took the test and it's A and D.
Answer:
A And D
Yw C: for help
What forces typically hold ions together?
O A. Intermolecular forces
OB. Ionic attractions
OC. Metallic bonds
O D. Covalent bonds
Answers
Answer: Ionic attractions
Explanation:
Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.
What is the percent composition of all the elements of sucrose, C12, H22 and O11?please be specific..
Answers
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
There are completely ( 12 + 22 + 11 = 45 ) elements .
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
(( C )) percentage :
\( \frac{12}{45} \times 100 = \frac{4}{15} \times 100 = 26.666 \: \: percent \\ \)
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
(( H )) percentage :
\( \frac{22}{45} \times 100 = 48.888 \: \: percent \\ \)
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
(( O )) percentage :
\( \frac{11}{45} \times 100 = 24.444 \: \: percetage \\ \)
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
I NEED HELP PLEASE, THANKS! :)
The mole is a counting number that allows scientists to describe how individual molecules and atoms react. If one mole of atoms or molecules is equal to 6.022 × 10^23 atoms or molecules, how many molecules are in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2? Express your answer to the correct number of significant figures. (MM of Cu(OH)2 is 97.562 g/mol)
Answers
Answer:
\(\large \boxed{1.447 \times 10^{23}\text{ molecules Cu(OH)}_{2 }}\)
Explanation:
1. Calculate the moles of copper(II) hydroxide
\(\text{Moles of Cu(OH)}_{2} = \text{23.45 g Cu(OH)}_{2} \times \dfrac{\text{1 mol Cu(OH)}_{2}}{\text{97.562 g Cu(OH)}_{2}} = \\\\\text{0.240 36 mol Cu(OH)}_{2}\)
2. Calculate the molecules of copper(II) hydroxide
\(\text{No. of molecules} = \text{0.240 36 mol Cu(OH)}_{2} \times \dfrac{6.022 \times 10^{23}\text{ molecules Cu(OH)}_{2}}{\text{1 mol Cu(OH)}_{2}}\\\\= 1.447 \times 10^{23}\text{ molecules Cu(OH)}_{2}\\\text{The sample contains $\large \boxed{\mathbf{1.447 \times 10^{23}}\textbf{ molecules Cu(OH)}_{\mathbf{2}}}$}\)
Answer:
Mass of Cu(OH)2 = 23.45 g
Molar mass of Cu(OH)2 = 97.562 g/mol
Since we know,
Moles = Mass/Molar mass
\Rightarrow Moles = (23.45 g)/(97.562 g/mol) = 0.2404 moles
Since 1 mole of substance contains = 6.022 × 1023 molecules
So 0.2404 moles will contain = 0.2404*(6.022 × 1023 molecules) = 1.448 × 1023 molecules
Explanation:
Explain how each property affects the energy in a wave:
Amplitude:
Wave speed:
Wavelength:
Frequency:
Answers
Answer:
frequency
Explanation:
because a wave is equally a frequency
The molar mass of gallium (
G
a
GaG, a) is
69. 72
g
/
m
o
l
69. 72 g/mol69, point, 72, space, g, slash, m, o, l. Calculate the number of atoms in a
27. 2
m
g
27. 2 mg27, point, 2, space, m, g sample of
G
a
GaG, a
Answers
Answer:
Explanation:
To calculate the number of atoms in the sample of gallium, we first need to determine the number of moles present in 27.2 mg of gallium. We can use the molar mass of gallium to convert mass to moles:
1 mol Ga = 69.72 g
x mol Ga = 27.2 mg
x mol Ga = 0.000390 mol Ga
Next, we can use Avogadro's number (6.022 x 10^23 atoms/mol) to convert the number of moles to the number of atoms:
0.000390 mol Ga * 6.022 x 10^23 atoms/mol = 2.35 x 10^20 atoms
Therefore, there are 2.35 x 10^20 atoms of gallium in a 27.2 mg sample.
Identify the name of the carboxylic acid derived from an alkane with one carbon.Select the correct answer below:methanoic acid
monocarboxylic acid
monoalkane acid
ethanoic acid
Answers
The carboxylic acid derived from an alkane with one carbon is called methanoic acid. Option A is correct.
Carboxylic acids are organic compounds containing a carboxyl group (-COOH) attached to a carbon atom. This functional group consists of a carbonyl group (C=O) and a hydroxyl group (-OH) attached to the same carbon atom. The general formula for carboxylic acids is R-COOH, where R is an alkyl or aryl group.
Carboxylic acids are commonly found in nature and have many important biological functions. They are essential building blocks for the synthesis of amino acids, which are the building blocks of proteins. Carboxylic acids are also involved in many metabolic pathways and are important in the metabolism of fats.
Carboxylic acids are used in many applications, including as preservatives in food and as intermediates in the synthesis of pharmaceuticals, polymers, and other organic compounds.
Hence, A. is the correct option.
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--The given question is incomplete, the complete question is
"Identify the name of the carboxylic acid derived from an alkane with one carbon. Select the correct answer below: A) methanoic acid B) monocarboxylic acid C) monoalkane acid D) ethanoic acid."--
Does the amount of mentos affect the height of the pop explosion
Answers
Answer:
no
Explanation:
bcuz science
Answer:
The more mentos you put in a bottle of pop does not necessarily mean a larger explosion. The max amount of mentos with the largest explosion was 4 mentos, it went 350 cm high. With 5 or 6 mentos the explosion went only 330 and 310 cm high.
Hope this helped in some way?
answer for the rate please help me with my chemistry homework thank you so much
Answers
Answer:
Rate cup 1: 36.00 tsp/h.
Rate cup 2: 59.50 tsp/h.
Rate cup 3: 70.13 tsp/h.
Explanation:
Based on the given example, the units must be in tsp/hour. To do this we just have to divide tsp by seconds and then convert it to hours remembering that 1 hour equals 3600 seconds.
Let's calculate each case:
- Cup 1: 1 tsp, 1 minute 40 seconds. Remember that 1 minute equals 60 seconds, so 1 minute and 40 seconds equals 100 seconds. The calculation of the rate will look like this:
\(\frac{1\text{ tsp}}{100\text{ s}}\cdot\frac{3600\text{ s}}{1\text{ h}}=36.00\frac{tsp}{h}.\)The rate of cup 1 is 36.00 tsp/h.
- Cup 2: 2 tsp, 2 minutes 1 second. As we saw before 1 minute equals 60 seconds, so 2 minutes equals 120 seconds. 2 minutes and 1 second equals 121 seconds. The rate of cup 2 will be calculated as:
\(\frac{2\text{ tsp}}{121\text{ s}}\cdot\frac{3600\text{ s}}{1\text{ h}}=59.50\frac{tsp}{h}.\)The rate of cup 2 is 59.50 tsp/h.
- Cup 3: 3 tsp, 2 minutes 34 seconds. 2 minutes are the same that 120 seconds, so 2 minutes 34 seconds equals 154 seconds. The rate of cup 3 is calculated as follows:
\(\frac{3\text{ tsp}}{154\text{ s}}\cdot\frac{3600\text{ s}}{1\text{ h}}=70.13\frac{tsp}{h}.\)The rate of cup 3 is 70.13 tsp/h.