have Gym
Answer
answer 1
Answer:
Using the Guess method
Explanation:
Finding the square root of a number is an automatic action in tools like calculators and Excel without any reasoning behind it. Therefore, I find it more useful to describe what I learned in school: the method of guessing and approximating (it can have several other names).
The square root of a number is 'a number that produces a certain quantity when multiplied by itself'.
The guessing method guesses that number by approximation until you get exactly the right one.
For example, we want to know the square root of, say, 144. We know that 10*10 is 100. That's close. Let's add 1 to that. 11*11 is 121. Getting closer! 12*12 is… 144! Straight! Therefore, the square root of 144 is 12.
He used that technique every time he had to count by hand, no matter the number. I thought of a number that might be close enough (I guess! Do you have the method name now? Lol) and adjusted until I got my correct answer.
Related questions
When comparing the two elements P and I, the element with the highest first ionization energy is PP. When comparing the two elements P and I, the element with the highest first ionization energy is blank based on periodic trends only. based solely on periodic trends.
Answer
Answer:
Explanation:
The first ionization energy varies in a predictable way throughout the periodic table. Ionization energy decreases from top to bottom in groups and increases from left to right over a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.
Given the two reactions PbCl2(aq)⇌Pb2+(aq)+2Cl−(aq), K3 = 1.89×10−10, and AgCl(aq)⇌Ag+(aq)+Cl−(aq), K4 = ,25 ×10 −4, what is the Kfinal equilibrium constant for the following reaction? PbCl2(aq)+2Ag+(aq)⇌2AgCl(aq)+Pb2+(aq) Express your answer numerically.
Answer
Answer:
Explanation:
The reactions given are:
PbCl2(ac)⇌Pb2+(ac)+2Cl−(ac)
AgCl(ac)⇌Ag+(ac)+Cl−(ac)
The required reaction is:
PbCl2(ac)+2Ag+(ac)⇌2AgCl(ac)+Pb2+(ac)
Which of the following statements about Ca2+ pumps is FALSE? Which of the following statements about Ca2+ pumps is FALSE? A. Calcium is actively transported from the cytosol into the extracellular fluid. B. Maintains low cytosolic calcium levels. C. The pump is also an ATPase. D. Calcium is actively transported from an organelle to the cytosol. E. It is a form of primary active transport.
Answer
Answer: The correct answer is D.
Explanation:
Calcium is not actively transported from an organelle to the cytosol.
Calcium pumps are protein pumps that move Ca2+ back into the sarcoplasmic reticulum (a modified endoplasmic reticulum) of skeletal muscle after each contraction. They belong to the family of ion transporter proteins.
In calcium homeostasis, these pumps are basic ion transporters located in the cell membrane of all animal cells. They help pump Ca2+ out of the cell to maintain electrochemical gradients across the cell membrane.
The pump in the membrane called Ca2+ ATPase (PMCA) and the sodium-calcium exchanger, and they actively pump cytosolic calcium •
The calcium pump has high affinity for Ca2+ but low ability to pump Ca2+, while NCX has low affinity for Ca2+ but high ability to pump Ca2+.
The next questions involve the amount of some materials you will use in the calorimetry lab. Keep a copy of your answers so you don't have to recalculate them in the lab. (a) How many moles of NH3 will you use in part C of the calorimetry experiment?
Answer
Answer:
0,075 moles
Explanation:
Molarity = mass/molar mass*1000/volume (ml)
Mol = Time/ molar time
Given
Molaritet = 1,50 mol/ml
Volume = 50mL
∴ mol = Molarity*Volume/1000
=1,50 *50 / 1000
= 0,075 moles
You'll put a drop of hydrogen peroxide on the edge of your plate as one of the many tests used to identify bacteria. If it bubbles, it means that: a. it is a negative reaction, which means that catalase b is present. is a positive reaction, which means that catalase is present c. it is a negative reaction, which means that catalase is not present d. is a positive reaction, which means that catalase is not present
Answer
Putting a drop of hydrogen peroxide on the edge of your plate as one of the many tests used to identify bacteria. If it bubbles, it means that
b.It is a positive reaction.
Hydrogen Peroxide Test:
Hydrogen peroxide decomposes into water and oxygen when heated or in the presence of various substances. This test is used to identify organisms that produce the catalase enzyme.
This enzyme detoxifies hydrogen peroxide by breaking it down into water and oxygen gas. Bubbles resulting from the production of oxygen gas clearly indicate a catalase positive result.
The correct option is therefore b.
Find more information about hydrogen peroxide testing here:
brainly.com/question/2094740
Answer:
I would say ''B, positive reaction''
Hope this helps ^-^* Sorry if I'm wrong.
Explanation:
A sample of 850 grams of Pb is equal to how many moles
Answer
850g of Pb bran 4.10 mol
If you weigh the lauric acid to the nearest 0.1 g and weigh the unknown solid to the nearest 0.0001 g, can you find the molar mass of your unknown solid to three significant figures? Clearly show your reasoning.
Answer
To calculate a molar mass of your unknown solid to three significant figures, here's what we need to do:
The limiting significant number in a calculation is our smallest number. 1 g is a number using the rules for significant figures. Similarly, we don't count zeros unless there's a non-zero number in front of it, so 0.0001 g is still 1 number.
What are significant figures?
They are the number of digits in a value, often a measure that contributes to the degree of precision of the value.
Thus, using significant figures, we can also calculate the molar mass of an unknown solid.
Find more information on significant figures here:
brainly.com/question/15027067
Answer and explanation:
The limiting significant number in a calculation is our smallest number. 1 g is a number using the rules for significant figures. Similarly, we don't count zeros unless there's a non-zero number in front of it, so 0.0001 g is still 1 number.
So no, we only know the unknown of one significant figure.
Neon has three naturally occurring isotopes: Ne-20 with a mass of 19.9924 amu and a natural abundance of 90.60%, Ne-21 with a mass of 20.9938 amu and a natural abundance of 0.260%, and Ne -22 with a mass of 21 .9914 amu and a natural abundance of 9.20%
Answer
Answer:
20.191 kilos
Explanation:
To calculate the average atomic mass of neon, we take into account the individual isotopes and their masses. We multiply the percentage of each of their abundances by their masses and add the results to arrive at the value.
This can be done as follows;
[90.60/100 * 19.9924] + [0.26/100 * 20.9938] + [9.2/100 * 21.9914] = 18.113 + 0.055 + 2.023 = 20.191 a
A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 at a path of 1.30 cm, what is the concentration of the solution?
Answer
Answer:
2.448 * 10^-5M
Explanation:
To calculate the concentration of the solution, we use Beer Lambert's law.
That is A = £LC
where £ represents the molar extinction coefficient.
We identify the values as follows:
A = absorbanos = 0,735
L = cell length = 1.30
£ = 23100
c = concentration = ?
Rearranging the equation, c = A/£L
c = 0,735/(23.100 * 1,3)
c = 2448 * 10^-5 M
In an air-filled room, the air is made up mostly of nitrogen and oxygen molecules (both at room temperature). Find (to two significant figures) the values of vrms for both molecules. (Equation (20.26) relates vrms to absolute temperature.
Answer
Explanation:
The expression for speed is as follows.
where, = root mean square of the velocity
k = Boltzmann's constant
T = temperature
M = masa molecular
Since the molecular weight of oxygen is 0.031 kg/mol and R = 8.314 J/mol K. Therefore, we will calculate the value of as follows.
=
= 498,5 m/s
Therefore, the oxygen atom is 498.5 m/s.
For nitrogen atoms, the molecular weight is 0.028 kg/mol. Therefore, we will calculate its speed as follows.
=
= 524,5 m/s
Therefore, the velocity of nitrogen is 524.5 m/s.
Consider two solutes, solute A and solute B, that have the same lattice energy. Both solutes dissolve exothermically in water, but solute A creates weaker ion-dipole intermolecular forces with water. Which solute generally has a more exothermic solution?
Answer
Consider two solutes, solute A and solute B, that have the same lattice energy. Both solutes dissolve exothermically in water, but solute A creates weaker ion-dipole intermolecular forces with water. Which solute has a more exothermic solution in general?
Answer:
Solute B has a more exothermic solution.
Explanation:
Since solute A and solute B have the same lattice energy, but solute A has weaker ion-dipole intermolecular forces with water, which is the solvent.
Solution B will dissolve faster due to the higher ion-dipole intermolecular force compared to solution B, in the dissolution process it releases energy to that solvent.
Therefore, solute B has a more exothermic solution.
The structure of the compound or molecule helps predict the name of the compound. Given the binary molecule HCl, which statement does not follow the IUPCA rules of nomenclature?
Answer
Answer:
The two nonmetals indicate that the covalent naming rules apply.
Explanation:
What is the mass in grams of 4.91 moles of ammonium sulfate?
Answer
Answer:
648.12 grams
Explanation:
First we need to find the molar mass of ammonium sulfate (NH4)2SO4. This can be achieved by:
Masa molar de (NH4)2SO4 = 2(14+4)+32+(4x16) = 132g/mol
Mass of (NH4)2SO4 = 4.91 x 132 = 648.12 g
1 mol is equal to 1 mol of ammonium sulfate or 132.13952 grams
Small amounts of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3 ( er ). The reaction equation is 2 KClO3 ⟶ 2 KCl + 3 O 2 Calculate how many grams of O 2 (g) can be produced by heating 66.8 g of KClO 3 (s).
Answer
Answer:
The answer to your question is 52.35 g O₂
Explanation:
oxygen mass = ?
masa de KClO3 = 66,8 g
chemically balanced reaction
KClO3 ⇒ 2 KCl + 3O₂
Deal with
1.- Calculate the molar mass of KClO₃ and Oxygen
KClO3 = 39 + 35,5 + (16 x 3) = 122,5 g
O2 = 16 x 6 = 96 g
2.- Write proportions to solve this problem
122,5 g KClO3 ------------------ 96 g O2
66,8 g ------------------ x
x = (66,8 x 96) / 122,5
x = 6412,8/122,5
x = 52.35 g O2
In a chemical reaction, the physical states of each chemical species are indicated by a state symbol. Each state is represented by a small letter in parentheses after the formula. For example: (s) indicates solid, (l) indicates liquid, and (g) indicates gas. What does the status symbol (aq) indicate?
Answer
Aqueous media dissolved in water.
Ammonia is produced industrially by the reaction: for the reaction: ΔH° = –92.2 kJ and K (at 25°C) = 4.0 × 10⁸. When the reaction temperature increases to 500°C, which of the following is true?
one. At equilibrium, more NH3 is present at 500°C than at 25°C.
b) The reaction of N2 with H2 to form ammonia is endothermic.
c.K for the reaction will be higher at 500°C than at 25°C.
d) The formation of products (in equilibrium) is not favored as the temperature rises.
e) None of these options is true.
Answer
Answer:
The correct option is D.
Explanation:
The reaction in question is that of the formation of ammonia. The arrow in the reaction must be a reversible arrow. Due to the negative value of ΔH, the forward reaction is exothermic, while the reverse reaction is endothermic.
An increase in the temperature of a system in equilibrium favors the endothermic reaction, therefore the reverse reaction (the reactants) is favored. And when the reverse reaction is favored, more reactants are produced. Therefore, the formation of products (at equilibrium) is not favored when the temperature is raised.
If the solvent-solute interactions in a mixture are the solvent-solvent interactions and the solute-solute interactions, a homogeneous solution is formed. If the solvent-solute interactions in a mixture are the solvent-solvent interactions and the solute-solute interactions, the formation of a homogeneous solution is uncertain.
Answer
Answer:
a) If the interactions between solvent and solute in a mixture are stronger than the interactions between solvent and solvent and the interactions between solvent and solute, a homogeneous solution is formed.
b) If the interactions between the solvent and the solute in a mixture are weaker than the interactions between the solvent and the solute and the interactions between the solvent and the solute, the formation of a homogeneous solution is uncertain.
Explanation:
The solubility of the solute in a given solvent depends mainly on the intermolecular interactions between the solvent and the solute. If the solute is surrounded and solvated by the solvent, the solute will dissolve in that solvent. Therefore, in order to dissolve, the solute must form stronger interactions with the solvent compared to interactions with the solute or solvent-solvent interactions.
Example:
When NaCl is added to water, the partially negative oxygen in the water is attracted to the Na+ from NaCl, and the partially positive hydrogen in the water is attracted to the Cl⁻ from NaCl. These new interactions between the NaCl ions and water are stronger than the interactions between the water molecules and the NaCl molecules themselves, resulting in the solubility of NaCl in water.
On the other hand, if NaCl is added to hexane (C₆H₁4), it does not achieve strong interactions with the solvent molecules, resulting in the insolubility of NaCl in hexane.
Arrhenius acids are 1. substances that produce hydrogen atoms in solution. 2. substances that produce hydronium ions in aqueous solution. 3. substances that produce hydroxide ions in solution. 4. substances that cause the pH of a solution to rise
Answer
Answer:
1) substances that produce hydrogen atoms in solution.
Explanation:
A Swedish scientist, Savante Arhenius, gives the theory of the behavior of acid bases. According to Arrhenius, the Arrhenius acid compound produces hydrogen ions or protons when added in an aqueous solution. Acid is a molecular compound having a highly polar covalently bonded ionizable hydrogen atom. HCL is a covalently bound polar gas at room temperature and normal pressure. When adding HCL to water causes ionization, the water breaks down into chloride ions and hydrogen ions, in this reaction chlorine strengthens the electron pair bond while hydrogen ion or proton bonds with water. chlorine gains bond pair electrons due to higher electronegativity than hydrogen and hydrogen loses its electron due to lower electronegativity and becomes hydrogen ions, these hydrogen ions unite with water to form hydronium ions. The hydronium ion is a polyatomic ion.
- Ionization of HCL in water
- formation of polyatomic hydronium ions after ionization of HCL in water, where hydrogen ions bind to water and form polyatomic ions.
.
Answer:
SUS 2 (HYDRONIUM)
Explanation:
I learned the answer the hard way, please, that's 2!
The vapor pressure of pure acetone (CH3COCH3) at 30 oC is 240 torr. The vapor pressure of pure water (H2O) at 30 oC is 40 torr. If the total vapor pressure of a mixture of water and acetone at 30 oC is 190 torr, what is the mole fraction of acetone?
Answer
The mole fraction of acetone is 0.75.
Taking into account that,
- The vapor pressure of pure acetone (CH3COCH3) at 30 oC is 240 torr.
- The vapor pressure of pure water (H2O) at 30 oC is 40 torr.
- And the total vapor pressure of a mixture of water and acetone at 30 oC is 190 torr.
Calculation of the mole fraction of acetone:
Suppose the mole fraction of acetone = x
And the mole fraction of pure water is 1 - x
No
190 = 240x + 40(1 - x)
190 = 240x + 40 - 40x
190 = 200x + 40
150 = 200x
x = 0,75
Find more information about water here: brainly.com/question/4381433?referrer=searchResults
Two equilibrium reactions of nitrogen with oxygen are given below, with their corresponding equilibrium constants (Kc) at a particular temperature. reaction (1): N2(g) + O2(g)2NO(g); Kc = 1.54e-31 reaction (2): N2(g) + 1/2 O2(g) N2O(g); Kc = 2.61e-24 Using this data set, determine the equilibrium constant for the following reaction at the same temperature. reaction (3): N2O(g) + 1/2 O2(g) 2 NO(g)
Answer
Answer:
Kc = 1,54e - 31 / 2,61e - 24
Explanation:
1); Kc = 1,54e - 31
2); Kc = 2,16e - 24
inverting (2) Eq
Kc = 1/2,16e - 24
now adding 1 and inverting equation (2)
we obtain ,
Kc = 1,54e-31 × 1/2,61e - 24
the equilibrium constant for equation (3) is -
Kc = 1,54e - 31 / 2,61e - 24
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FAQs
How do I get the square root of a number? ›
For example, 6 × 6 = 36. Here, 36 is the square of 6. The square root of a number is that factor of the number and when it is multiplied by itself the result is the original number. Now, if we want to find the square root of 36, that is, √36, we get the answer as, √36 = 6.
What is the easiest formula for square root? ›The square root of any number can be expressed using the formula: √y = y½. In other words, if a number has 1/2 as its exponent, it means we need to find the square root of the number.
What is the square root of 7? ›√7 = 2.645. Thus, the square root of 7, √7 is approximately equal to 2.645.
How to solve √ 3? ›The square root of 3 is represented as √3 or 31/2. The numerical value of root 3 is given as follows: √3 = 1.732050807568877293527446341505872366….. To make the calculation easier, the value of root 3 is truncated as 1.732.
How do you find ✓ 5? ›Therefore, the value of root 5 is, √5 = 2.2360… You can find the value of the square root of all the non-perfect square number with the help of the long division method.
Where is the root of 5? ›The square root of 5 is 2.23606.
What is a root of 16? ›Step 4: Therefore, the value of the square root of 16, √16 is 4.
How do you find the square root of 13? ›The square root of 13 is given by √13 in the radical form and as (13)½ in exponential form. It is equal to 3.60555128. Since 3.60555128 is not a whole number but a fraction, therefore, 13 is not a perfect square.
Is √ 49 7 or 7? ›Step 4: Therefore, the value of the square root of 49, √49 is 7.
How do you find the square root of 89? ›For example, the square root of 25 is equal to 5, because 5 x 5 = 25. Expressed in a radical form: √25 = 5. Therefore, solving for the Square Root of 89, we find that the square root of 89 is 9.434. Always remember: your answer can be either a whole number or a decimal.
Is there a square root of 8? ›
The actual answer for the square root of 8 is 2.82842712475.
What are the roots of √ 4? ›The value of root 4 is equal to exactly 2. But the roots could be positive or negative or we can say there are always two roots for any given number. Hence, root 4 is equal to ±2 or +2 and -2 (positive 2 and negative 2). You can also find square root on a calculator.
Which is the square root of 121? ›Square root of 121 is 11.
It is represented as √121 = 11. When a number is multiplied by itself the resultant number is called the square of a number.
Thus, the square root of 50 is the value that is squared to get the original number. The simplified form of the square root of 50 is 5√2 or 7.07 (approximately).
How do you find the value of root 19? ›What is the Value of the Square Root of 19? The square root of 19 is 4.35889.
Is 7 a perfect square? ›Informally: When you multiply an integer (a “whole” number, positive, negative or zero) times itself, the resulting product is called a square number, or a perfect square or simply “a square.” So, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.
How do you solve root 10? ›The square root of 10 is expressed as √10 in the radical form and as (10)½ or (10)0.5 in the exponent form. The square root of 10 rounded up to 10 decimal places is 3.1622776602. It is the positive solution of the equation x2 = 10.
What is 55 square root? ›Therefore, solving for the Square Root of 55, we find that the square root of 55 is 7.416. Always remember: your answer can be either a whole number or a decimal.
What is the square root of 42? ›Square Root of 42 in Decimal Form: 6.481.
What is the value of √? ›| Square Root from 1 to 10 Rounded to 3 Decimal Places | |
|---|---|
| √1 = 1 | √2 = 1.414 |
| √3 = 1.732 | √4 = 2 |
| √5 = 2.236 | √6 = 2.449 |
| √7 = 2.646 | √8 = 2.828 |
Is 4 a square root? ›
4 is a perfect square. So the square root of 4 is 2.
Is √ 5 a number answer? ›⇒√5 is a rational number. But √5 is an irrational number.
What are the square roots of 64? ›The square root of 64 is 8, i.e. √64 = 8.
What is the square root of 400? ›√400 is 20, which is a rational number. To find the square root, we can use the simple prime factorisation method or long division method.