An avalanche comes down the East side of the mountain. If the avalanche lasted for 97 seconds and travels 4.5 miles, what was the velocity of the avalanche?

The most common way to monitor the rate of reaction is by observing the increase in the absorbance of the solution.

The rate of reaction is the rate at which reactants are converted into products or the rate at which the reactants disappear.

Given that the reaction is a colorimetric reaction, the most common way to monitor the rate of reaction is by observing the increase in the absorbance of the solution.

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From the  highest to lowest Ionization Energies for beryllium, calcium, magnesium, and strontium, the order is:  Be > Mg > Ca > Sr

Ionization energy is defined as a measure of the difficulty in removing an electron from an atom or ion or the tendency of an atom or ion to give off an electron.

Now, ionization energy usually decreases as it descends in a group.  Thus, from the  highest to lowest for beryllium, calcium, magnesium, and strontium, the order is determined as:

Be > Mg > Ca > Sr

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Answer: B (BE > MG > CA > SR)

Explanation: ON EDGE

The mass of NaCl that can be produced from 9.8 moles of HCl is 572.712 g

2Na + 2HCl --> 2NaCl + H₂

From the balanced equation above,

2 moles of HCl reacted to produced 2 moles of NaCl.

Therefore,

9.8 moles of HCl will also react to produce 9.8 moles of NaCl

Mass = mole × molar mass

Mass of NaCl = 9.8 × 58.44

Mass of NaCl = 572.712 g

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Answer:

Option D

Explanation:

sour taste refers to acid hence B is wrong

Bases have pH higher than 7 so D is the correct answer

Answer:

Slippery, high pH, and caustic

(last option listed)

Explanation:

sour taste - acid feature

pH < 7 - acid feature [low pH]

dissolves metal - strong acid feature

bitter taste - base feature

slippery feel - base feature

pH > 7 - base feature [high pH]

dissolves metal - strong base feature

[essentially, traits of base can be described as opposites of acid traits]

So, if you combine these traits, "Slippery, high pH, and caustic" best describes characteristics of a base

Yes, you're absolutely correct

Titanium dioxide is a type of mixture if particles of titanium dioxide are insoluble in the liquid.

A mixture is composed of one or more pure substances in varying compositions.

A mixture is a material made up of two or more components joined together, but not chemically combined. In a mixture, a chemical reaction does not occur and each of its components maintains its identity and chemical properties.

A compound is a substance formed by the chemical combination of two or more different elements from the periodic table. The elements of a compound cannot be divided or separated by physical processes. They are not mixtures or alloys

An element is a type of matter made up of atoms of the same class.  It is an atom with unique physical characteristics, a substance that cannot be decomposed by a chemical reaction.

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Answer:

The name of this molecule structure is 1-Butyne

The name of the given molecule according to IUPAC is 1-Butyne. Thus, option C is correct.

The IUPAC nomenclature is given as the standard naming technique that is used to name a chemical compound. It is named with the following main rules.

The triple bond compound is an alkyne with the suffix -yne. The development of the name to the given structure is therefore given by counting the number of carbon atoms, and the location of the triple bond.

There are 4 carbon atoms in the structure with the triple bond at carbon 1, therefore the name will be 1-Butyne. Hence, option C is correct.

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Answer:

chemical because it turned into a new compound

Explanation:

is zinc and hydrogen chloride combining into zinc chloride and hydrogen gas a chemical or physical change?​

physical change is like  boiling, melting, freezing, and shredding

but its still the same compound

chemical is like it turns into something else like a new compound

Zn + 2HCl = ZnCl2 + H2(g)

Metal + Acid → Hydrogen + Acid Anion

new compound forms in this reaction

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Les McLean

toppr

Answer:

B it is decomposition reaction

Explanation:

In decomposition reaction compound is broken into two or other elements

1.Four major features provide clues:

(1) The Sun, planets, and large moons generally rotate and orbit in a very organized way.

(2) With the exception of Pluto, the planets divide clearly into two groups: terrestrial and jovian.

(3) The solar system contains huge numbers of asteroids and comets.

(4) There are some notable exceptions to these general patterns.

2. Gravity causes the early solar nebula to collapse. The solar nebula flattens and warms at its core as it revolves. Within the spinning disk, planetesimals (early planets) begin to form.

3. Because the center of the revolving disk had the least amount of centripetal force, the majority of the mass from the nebula cloud was drawn to it by gravity. The majority of the material was hydrogen gas that was subjected to extreme pressure, which heated it to a critical point, causing it to fuse with another hydrogen atom, resulting in the formation of helium and the birth of the sun.

4. Nebular Theory: argues that when the Sun formed in the nebula, it created planets, asteroids, and other bodies from a spinning disk of materials known as the accretion disk. Almost all revolve in the same direction on their axes. Venus and Uranus are moving backwards on their axes.

5. In the inner solar nebula, only dense materials could condense. The Jovian planets are really denser than the terrestrial planets. Gravity compresses terrestrial planets to a greater extent, causing them to become denser. The gravity of the Sun drew dense materials into the inner solar system.

The nebular hypothesis has been given to states about the spinning dust cloud. The nebula started collapsing due to the force of gravity. It was formed by the rotation of the planets and celestial bodies.

The nebular hypothesis was to give the idea about the origin of the solar system based on dust and gases. According to the nebular hypothesis, the nebula started to collapse due to the force of gravity and the shock of the explosion from the Supernova.

The movement and rotation of the planets in orbits, revolutions, and motions suggest that the formation of the nebula along with asteroids and comets is the reason for its formation.

According to the hypothesis, the Sun was formed by the collapse of the heavy helium and hydrogen clouds that resulted in an increase in the temperature at the core and started to increase its temperature even more.

The hypothesis also accounts for the formation of the planets as the formation of the Sun and rotating dust and gases resulted in a rotating solar system that contained planets in it that was first released as planetesimals. The inner planets are denser compared to the outer planets because of the gravitation force.

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Answer:

2.67 N

Explanation:

The normality equation looks like this:

Normality = Molarity (M) x Number of Equivalents

In this formula, the number of equivalents represents how many moles of the acidic species exist in the molecule. In other words, how many hydrogen atoms are in citric acid? This value would be 8 equivalents (as denoted by the subscript).

So, to find the normality, you need to (1) convert grams C₆H₈O₇ to moles (via molar mass), then (2) calculate the molarity (via molarity equation using moles and volume), and then (3) calculate normality (via normality equation using molarity and # of eq.).

(Step 1)

Molar Mass (C₆H₈O₇): 6(12.011 g/mol) + 8(1.008 g/mol) + 7 (15.998 g/mol)

Molar Mass  (C₆H₈O₇): 192.116 g/mol

128 g C₆H₈O₇             1 mole
----------------------  x  ----------------------  =  0.666 moles C₆H₈O₇
                                   192.116 g

(Step 2)

Molarity = moles / volume (L)

Molarity = 0.666 moles C₆H₈O₇ / 2 L H₂O

Molarity = 0.333 M

(Step 3)

C₆H₈O₇  -----> 8 hydrogen atoms

Normality = molarity x number of equivalents

Normality = 0.333 M x 8

Normality = 2.67 N

The volume of 0.125 mole of the gas at the same temperature and pressure 0.30 L

The new volume can be obtained as illustrated below

PV = nRT

Divide both side by P

V = nRT / P

Divide both side by n

V / n = RT / P = Constant

Thus,

V₁ / n₁ = V₂ / n₂

2 / 0.82 = V₂ / 0.125

Cross multiply

0.82 × V₂ = 2 × 0.125

Divide both side by 0.82

V₂ = (2 × 0.125) / 0.82

V₂ = 0.30 L

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Investing   :

"I'm considering investing in equities."

"I need a system for handling my finances."

"I need to put money away for the future."

No Investment :

"My knowledge of investment is limited."

"I am unable to purchase stocks."

"I don't particularly enjoy taking chances."

Explanation:

These are accurate because I recently completed the course that taught me these things.

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how are we (brainly users) supposed to know. unless its just me that doesn't know.

sorry that this isn't really much help. :/

The amount of quarts in 2.50 L is 2.65 qt

Since the teacher prepares 2.50 liters of salt solution for a class experiment, we require how many quarts there are in 2.50 liters.

Since we know that 1 L = 1.06 qt, converting liters to quarts, we have

2.50 L = 2.50 × 1 L

= 2.50 × 1.06 qt

= 2.65 qt

So, the amount of quarts in 2.50 L is 2.65 qt

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The mass of [tex]YCl_3[/tex] that would be formed will be 18.22 grams

Let us first look at the balanced equation of the reaction:

[tex]2Y + 3Cl_2 --- > 2YCl_3[/tex]

The mole ratio of Y to [tex]Cl_2[/tex] is 2:3.

Mole of 10.0 grams of Y = 10/88.9 = 0.11 moles

Mole of 10.0 grams  [tex]Cl_2[/tex] = 10/71 = 0.14 moles

3/2 of 0.11 = 0.165. Thus,  [tex]Cl_2[/tex] is limiting in availability.

Mole ratio of  [tex]Cl_2[/tex] and [tex]YCl_3[/tex] = 3:2

Equivalent mole of [tex]YCl_3[/tex] = 2/3 x 0.14 = 0.093 moles.

Mass of 0.093 moles [tex]YCl_3[/tex] =0.093 x 195.26 = 18.22 grams

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The volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.

The volume of a solution can be calculated by using the following formula:

Molarity = n/V

Where;

According to this question, an intravenous solution is noted as having a concentration of glucose equal to 0.312 M. The volume that will be needed is as follows:

volume = 0.078 moles ÷ 0.312M

volume = 0.25L = 250mL

Therefore, the volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.

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The mass of the hydrogen gas in tank, given the data is 6.17 Kg

PV = znRT

Divid both sides by zRT

n = PV / zRT

but

mole (n) = mass (m) / molar mass (M)

Thus,

m / M = PV / zRT

m = MPV / zRT

m = (2.016 × 493.4615 × 220) / (1.45 × 0.0821 × 298)

m = 6169 g

Divide by 1000 to express in Kg

m = 6169 / 1000

m = 6.17 Kg

Complete question

A gaseous hydrogen stored at 500 Bar and 25°C in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z = 1.45

3.06 kg

6.17 kg.

13.0 kg

5.05 kg

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Answer:

D. A person going down a water slide

Explanation:

There is a store of gravitational potential energy when they are at the top of the waterslide which is then converted to kinetic energy as they travel down. The gravitational potential energy is transferred because the person loses height as they go down the slide

Nitrogen is important for all humans because it is a major part of amino acids, which are the building constituents of proteins and of nucleic acids such as deoxyribonucleic acid, which transfers genetic information to the next generation.

It is the biogeochemical circuit that supplies nitrogen to living things and keeps it circulating in the biosphere.

Importance of the nitrogen :

Therefore, we can conclude that the nitrogen is a vital circuit for the existence of Humans and all other living organism since we are unable to fix nitrogen from its gaseous form.

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Answer:

Lewis acids and bases are most closely associated with ELECTRON TRANSFER. A Lewis acid is defined as as a chemical specie that can accept an electron pair from a Lewis base to form a Lewis adduct while a Lewis base is defined as a specie which can donate an electron pair to a Lewis acid or an acceptor compound. Thus, Lewis base and acid has to do with electrons transfer.

Explanation:

The molecules of the green food coloring would disperse throughout the water.

i) In a few hours, the molecules of the green food coloring would have started dispersing throughout the water from the region of higher concentration to the region of lower concentration.

ii) In several days, the molecules would have uniformly dispersed through the water.

b) According to the kinetic theory of particles, matters, irrespective of their nature, are made up of small molecules that are in constant random motion. The direction and pace of movement depend on the energy they possess as well as the kind of relationship that exists between the small molecules.

c)The process that takes place in the experiment is known as diffusion.

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Answer:

12.9 g O₂

Explanation:

To find the mass of oxygen gas produced, you need to (1) convert grams KClO₃ to moles KClO₃ (via molar mass from periodic table values), then (2) convert moles KClO₃ to moles O₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles O₂ to grams O₂ (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs to match the given value (33.0 g).

Molar Mass (KClO₃): 39.098 g/mol + 35.45 g/mol + 3(15.998 g/mol)

Molar Mass (KClO₃): 122.542 g/mol

2 KClO₃ ---> 2 KCl + 3 O₂

Molar Mass (O₂): 2(15.998 g/mol)

Molar Mass (O₂): 31.996 g/mol

33.0 g KClO₃           1 mole                 3 moles O₂            31.996 g
--------------------  x  -------------------  x  -----------------------  x  ------------------  =
                               122.542 g          2 moles KClO₃            1 mole

=  12.9 g O₂

Answer:

17.25g

Explanation:

From our question, we have been asked to find the mass of water present.

The formula for finding specific heat is given by;

Q = mCp∆T

We have, Q = 0.507 J, ∆T = 0.007° C and we know that Cp of water is 4.2 J/g°C

Rearrange the formula making m the subject.

Which is given by;

m = (Q)/(Cp∆T)

Substituting for the known values

[tex]m \: = \frac{0.507}{4.2 \times 0.007}[/tex]

= 17.24489 g

= 17.25g

Answer:

17.32 gm

Explanation:

Specific heat of water is 4.182 J / g- c

4.182  J /g-c   =  .507/ ( .007 * gm)

solve for gm = 17.32  gm

The mass of Ba(IO3)2 that can be dissolved in 500 ml of water at 25 degrees celcius is 2.82 g

The Ksp of Ba(IO3)2 = 1.57 × 10^-9

Molar mass of Ba(IO3)2 = 487 g/mol?

Dissociation of Ba(IO3)2 produces 3 moles of ions as follows:

[tex]Ba(IO_{3})_{2} \leftrightharpoons Ba^{2+} + 2\:IO_{3}^{-}[/tex]

[tex]Ksp = [Ba^{2+}]*[IO_{3}^{-}]^{2}[/tex]

[tex][Ba(IO_{3})_{2}] = \sqrt[3]{ksp} =

\sqrt[3]{1.57 \times {10}^{ - 9} } \\ [Ba(IO_{3})_{2}] = 1.16 \times {10}^{-3} moldm^{-3}[/tex]

moles of Ba(IO3)2 = 1.16 × 10^-3 × 0.5 = 0.58 × 10^-3 moles

mass of Ba(IO3)2 = 0.58 × 10^-3 moles × 487 = 2.82 g

Therefore, mass Ba(IO3)2 that can be dissolved in 500 ml of water at 25 degrees celcius is 2.82 g.

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