1. Get the Gizmo ready: Place the overflow cup under the faucet. Fill it until water starts to

flow out of the spout. Place the 250-ml beaker next to the overflow cup so that the spout of

the overflow cup is over the beaker. (If necessary, empty the beaker into the sink. )

2. Measure: Place the sphere into the overflow cup, causing water to pour into the beaker.

Empty the beaker into the 50-ml graduated cylinder. Place the magnifier over the

waterline.

A. What is the volume of water in the graduated cylinder?

26. 5ml

B. Recall that you used the ruler and the volume of a sphere equation to find the

volume of the sphere in activity B. What is the volume of the sphere?

Answer:

2 electrons

Explanation:

I literally learned this in class just now.

Answer:

There can be two electrons in one orbital maximum. The s sublevel has just one orbital, so can contain 2 electrons max. The p sublevel has 3 orbitals, so can contain 6 electrons max.

UwU I might be wrong

Answer:

A). An independent variable

Explanation:

The Independent variable is characterized itself as the variable that is controlled or manipulated by the experimenter to observe its direct impact on the dependent variable. It is a variable that is not dependent and can stand alone. For example, if a student aims to observe the impact of temperature on solubility of a substance(sugar/salt) in a liquid, the temperature will be the independent variable as any change in the temperature will directly affect the solubility power of the liquid. Thus, option A is the correct answer.

Answer:

D.

Explanation:

Answer:

Two Lithium ions and one carbonate ion

Explanation:

Let us look at this equation;

Li2CO3(s) ------->2Li^(aq) + CO3^2-(aq)

We can see that each unit of Li2CO3 has two lithium ions and one carbonate ion.

Let us not forget that Li has a valency of 1 while carbonate ion has a valency of 2. Exchange of valencies gives the final formula of the compound.

Answer:

Two Lithium ions and one carbonate ion

Explanation:

Answer:

Explanation:

When you are pedaling the bike, it is transforming chemical energy, supplied by the breakdown of the food you eat (any food), into mechanical energy to turn the pedals (energy we produce). The chemical energy is potential and the mechanical energy is kinetic.

Hope this helps :)

The chemical formula of magnesium chloride is MgCl2.

This can be determined by the following steps :

Therefore, the chemical formula for magnesium chloride is MgCl2.

Here is a diagram of the chemical structure of magnesium chloride:

Mg^2+

Cl- Cl-

As you can see, the magnesium atom is positively charged and the chlorine atoms are negatively charged. The opposite charges attract each other, forming a strong ionic bond.

Thus, the chemical formula of magnesium chloride is MgCl2.

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Explanation:

V1/T1 = V2/T2      T  must be in Kelvin

12.78 / (-50 + 273.15)  =  V2 / ( 28+ 273.15)

V2 = 17.25 L

Answer:

2..............

................

Answer:

A. 2

Explanation:

Answer:

To draw a Lewis dot structure for an atom, you must know how many valence electrons an atom possesses. The periodic table organizes the elements based on the similarity of their chemical properties.

Explanation:

Answer:

The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.

Nitrous oxide, also known as laughing gas, has an atmospheric lifetime of approximately 114 years.

This means that once it is released into the atmosphere, it can remain there for over a century before it is removed. Nitrous oxide is a potent greenhouse gas and contributes to global warming and climate change.

It is estimated that nitrous oxide is responsible for about 6% of the warming effect of long-lived greenhouse gases. In addition to its impact on climate, nitrous oxide also plays a role in the destruction of the ozone layer, which protects the Earth from harmful UV radiation.

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The molarity of  an acid refers to the number of moles of the acid in the solution.

An acid refers to a substance that contains hydrogen ions as its only positive ion in solution. This is an aqueous media based definition of acids according to Arrhenius.

The molarity of  an acid refers to the number of moles of the acid in the solution. The negative logarithm of the molarity of the acid is the pH of the acid solution.

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The particle diagrams can be used to represent elements and compounds.

A particle diagram is a box where colored balls are drawn to represent an atom or molecule. These diagrams can be used to represent elements or compounds and their molecular structure by the type of balls and the way they are connected.

The particle model is useful to scientists for two main reasons. Firstly, it offers a rational explanation for how matter behaves. Secondly, it supports a fundamental idea—that the particles in matter are constantly changing. The matter that appears perfectly stable is not stable at all.

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The question is incomplete. The diagram in question is attached below.

Answer:

Kilograms

Explanation:

The metric system denotes their measurements with prefixes (kilo)

Each F atom has a formal charge of 0 and the I atom has a formal charge of +2. The overall charge on IF₅ is 0.

The Lewis structure of IF₅ is, I; 7 valence electrons, F; 7 valence electrons each (5 F atoms)

Total valence electrons = 7 + 5(7) = 42

We place I at the center and connect it with the 5 F atoms using a single bond. This uses 6 valence electrons. We then place the remaining 36 electrons as lone pairs on the F atoms, giving each F atom a full octet. The Lewis structure is;

  F      F

  |      |

F--I--F--F--F

  |  

  F

To determine the formal charge on each atom, we use the formula;

Formal charge = valence electrons-lone pair electrons - 1/2(bonding electrons)

Valence electrons for I = 7

Lone pair electrons on I = 0

Bonding electrons on I = 5 x 2 = 10

Formal charge on I = 7 - 0 - 1/2(10) = +2

Valence electrons for F = 7

Lone pair electrons on F = 6

Bonding electrons on F = 1 x 2 = 2

Formal charge on F = 7 - 6 - 1/2(2)

= 0

Therefore , the charge of each atom in IF₅ is zero (0).

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The best elements to form ionic bonds with halogens, elements from group 17, are the atoms in group 1, which are the alkali metals, since they have 1 electron in their valence shell and halogens have 7 electrons in their valence shell, therefore the halogen will attract this extra electron from the metal and stabilize with 8 electrons. For our question, the best option is letter B, Sodium

The pH of this solution is 12.54.

A saturated aqueous solution of calcium hydroxide has a density of 1.02 g/mL and contains roughly 0.13% calcium hydroxide by mass. This solution's pH can be estimated as follows:

Calcium hydroxide has a molar mass of 74.1 g/mol and a solubility in water of roughly 0.13% calcium hydroxide by mass, or 1.3 g of Ca(OH)2 in 1000 g of water.

Calculate the molarity of the solution.

Number of moles of Ca(OH)2 in 1.3 g = 1.3/74.1 = 0.0175 moles in 1000 g of water

Number of moles in 1 L of water = 0.0175 * 1000/1000 = 0.0175 M

Calculate the [OH-] ion concentration[OH-] ion concentration = 2 x 0.0175 = 0.035 M

Calculate the pOH of the solution

pOH = -log[OH-] = -log0.035 = 1.46

Calculate the pH of the solution

pH = 14 - pOH = 14 - 1.46 = 12.54

Therefore, the pH of this solution is 12.54.

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After boiling the mixture of iron salt, water

iron, and salt it will remain and water will be evaporated

Explanation:

Making a salt from an alkali

If you are using an alkali - which is a soluble base - then you need to add just enough acid to make a neutral solution (check a small sample with universal indicator paper).

Warm the salt solution to evaporate the water. You get larger crystals if you evaporate the water slowly.

Answer:

Reduction half

Fe2+ +2e -------> Fe

Oxidation half

Mn-----> Mn4+. +4e

Explanation:

Oxidation is loss of electron and reduction is gain of electron

Answer:

10,765 g As

Explanation:

Percent yield = 78.7% , the correct answer is D) 78.7%, which represents the percent yield of NaCl in the reaction.

To calculate the percent yield of NaCl in the given chemical equation, we need to compare the actual yield of NaCl with the theoretical yield. The theoretical yield is the amount of NaCl that would be produced if the reaction went to completion based on stoichiometry.

First, we need to determine the theoretical yield of NaCl. By examining the balanced equation, we can see that the stoichiometric ratio between CuCl2 and NaCl is 1:2. This means that for every 1 mole of CuCl2, 2 moles of NaCl are produced.

Step 1: Convert the mass of CuCl2 to moles using its molar mass.

Molar mass of CuCl2 = 63.55 g/mol (atomic mass of Cu) + 2 × 35.45 g/mol (atomic mass of Cl)

Molar mass of CuCl2 = 134.45 g/mol

Moles of CuCl2 = 31.0 g / 134.45 g/mol ≈ 0.231 mol

Step 2: Use the stoichiometry to calculate the theoretical yield of NaCl.

Since the stoichiometric ratio between CuCl2 and NaCl is 1:2, the moles of NaCl produced will be twice the moles of CuCl2.

Moles of NaCl (theoretical) = 2 × 0.231 mol = 0.462 mol

Step 3: Convert the moles of NaCl to grams using its molar mass.

Molar mass of NaCl = 22.99 g/mol (atomic mass of Na) + 35.45 g/mol (atomic mass of Cl)

Molar mass of NaCl = 58.44 g/mol

Theoretical yield of NaCl = 0.462 mol × 58.44 g/mol ≈ 26.96 g

Now, we can calculate the percent yield using the formula:

Percent yield = (Actual yield / Theoretical yield) × 100

Percent yield = (21.2 g / 26.96 g) × 100 ≈ 78.7%

Option D

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Answer:

acid

Explanation:

7 is neutral if more than 7 add acid if less than 7 add alkali

The pH of the equivalence point in a 0.50 L solution of 0.10 M HF titrated to the equivalence point with a 0.10 M solution of NaOH is 8.28.

When HF is titrated with NaOH, the reaction is as follows: HF + NaOH → Naf + H2OAt the equivalence point, the moles of NaOH added is equal to the moles of HF initially present. Since the initial concentration of HF is 0.10 M and the volume of the solution is 0.50 L, the initial moles of HF are 0.10 M x 0.50 L = 0.050 moles. Therefore, 0.050 moles of NaOH are added to the solution.At the equivalence point, all of the HF has been converted to NaF, which is the conjugate base of HF. NaF is a basic salt that hydrolyzes in water, resulting in the formation of OH- ions.

This means that the solution will be basic at the equivalence point. To determine the pH of the equivalence point, we need to find the pOH first. Since the concentration of NaF is 0.10 M and the volume of the solution is 1.0 L (since the final volume is 1.0 L), the moles of NaF are 0.10 M x 1.0 L = 0.10 moles. Since NaF completely dissociates in water, it will produce 0.10 moles of OH- ions. Therefore, [OH-] = 0.10 moles / 1.0 L = 0.10 Musing the equation pOH = -log[OH-], we get: Poh = -log(0.10) = 1.00Therefore, pH = 14.00 - pOH = 14.00 - 1.00 = 13.00. Since we need to use two significant figures, the pH is 13.

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Answer:

c

Explanation:

because they transfer an electron the sodium ion has a positive charge, and the chlorine ion has a negative charge so one gives off positive and one gives of negative

The molar mass of Ferric Oxide (Fe2O3) is calculated as follows:

Fe: (2 atoms) x (56 g/mol) = 112 g/mol

O: (3 atoms) x (16 g/mol) = 48 g/mol

Fe2O3 = 112 g/mol + 48 g/mol = 160 g/mol

The molar mass of Lactic acid (C3H6O3) is calculated as follows:

C: (3 atoms) x (12.01 g/mol) = 36.03 g/mol

H: (6 atoms) x (1.01 g/mol) = 6.06 g/mol

O: (3 atoms) x (16 g/mol) = 48 g/mol

C3H6O3 = 36.03 g/mol + 6.06 g/mol + 48 g/mol = 90.09 g/mol

The molar mass of water (H2O) is calculated as follows:

H: (2 atoms) x (1.01 g/mol) = 2.02 g/mol

O: (1 atom) x (16 g/mol) = 16 g/mol

H2O = 2.02 g/mol + 16 g/mol = 18.02 g/mol

The molar mass of ascorbic acid (C6H8O6) is calculated as follows:

C: (6 atoms) x (12.01 g/mol) = 72.06 g/mol

H: (8 atoms) x (1.01 g/mol) = 8.08 g/mol

O: (6 atoms) x (16 g/mol) = 96 g/mol

C6H8O6 = 72.06 g/mol + 8.08 g/mol + 96 g/mol = 176.14 g/mol

Explanation:

guess

exothermic because of the heat

Answer:

Synthetic clothes can easily build up static electricity. It also easily can catch up on fire and when it does, it melts and can fuse to your skin.

Explanation:

Answer:

Explanation:

Synthetic fibres like Polyester catches fire very easily and melts. After melting It sticks to the body of the person wearing it causing severe burns. Hence it is advised not wear synthetic clothes while working in the Kitchen. Its advised to wear Apron or cotton clothes while cooking in Kitchen.

The inlet pressure of the pipeline in (bar) is 6.7 bar. To calculate the inlet pressure of the pipeline, we can use the Darcy-Weisbach equation.

Darcy-Weisbach equation relates pressure drop, flow rate, pipe characteristics, and fluid properties. The equation is given as:

ΔP = (fLρV²) / (2D) where:

ΔP is the pressure drop

f is the Darcy friction factor

L is the length of the pipeline

ρ is the density of water

V is the velocity of water

D is the diameter of the pipeline

First, we need to convert the flow rate from m³/hr to m³/s:

Flow rate = 27 m³/hr = (27/3600) m³/s = 0.0075 m³/s

Next, we need to calculate the velocity of water:

Area of the pipeline =\(\pi \times \frac {(76/1000)^2}{4} = 0.004556 m^2\)

Velocity
= Flow rate / Area of the pipeline
= 0.0075 m³/s / 0.004556 m² = 1.646 m/s

Now, we can calculate the pressure drop using the Darcy-Weisbach equation. Since we need to calculate the inlet pressure, we assume ΔP is the difference between the outlet pressure and the inlet pressure:

ΔP = (fLρV²) / (2D)

\(\triangle P = \frac {(0.015 \times 4000 \times 1000 \times 1.646^2)}{(2 \times 0.076)} = 10.69 \times 10^5 Pa\)

= 10.7 bar (approx)

Rearranging the equation to solve for the inlet pressure:

Inlet pressure = ΔP - outlet pressure = 10.7 bar - 4 bar = 6.7 bar

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ANSWER

EXPLANATION

Firstly, we need to define the word titration.

Titration is defined as a technique that is used to determine the known concentration of an unknown solution.

This normally occurs between an acid and a base

During titration, an indicator changes color when equilibrium has been attained between the two solutions. The solutions are normally acid and base. At equilibrium, the number of moles of acid is equal to the number of base.

Therefore, the correct answer is option C

When considering the precise mass, the particle has the greatest mass is the neutrons.

The Neutron is the heaviest among all the subatomic particles with the  mass of the  1.0087 amu, and the proton has the mass of the 1.0073 amu. The Positron and the electron both have the mass of the 0.00055 amu.

The difference in between the mass  of the neutron and the proton is very small. This is the reason that they are both have the relative mass of the one atomic mass unit. The mass of the neutron in the grams  is the  1.674 × 10⁻²⁴ grams.

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