HELPPP PLEASEEE....

How does a glass of juice become cold when you add ice to it?
aThe ice makes the glass colder so the juice becomes colder.
bThe ice cools the glass of juice because the slow moving particles in the ice cause the particles of the juice to slow down.
cIce is colder than the juice. The cold travel from cold to warm until both items are the same temperature.
dThe juice is warmer than the ice. Heat travels in one direction until both items are the same temperature.

Answer:

C!

Explanation:

only C

A: solid B: liquid : C: GAS

Answer:

C.

Explanation:

Gas molecules are always spread far apart, and have room to move freely, so the answer is C.

Answer:

4.64g MgO(s)

Explanation:

Given 2Mg(s) + O₂(g) => 2MgO(s)

           2.8g     excess        (?)

  => 2.8g/24.31 g/mol

       = 0.115 mol. Mg(s)  => 0.115 mol. MgO(s)

grams MgO(s) produced  = 40.31g/mol. x 0.115 mol. = 4.64g (Theoritical Yield)

Answer:

1,372,800,000 Feet

Explanation:

1 Mile = 5280 Feet

260,000 Miles = 5280 × 260,000 Feet

260,000 Miles = 1,372,800,000 Feet

Answer:

i think it Na (sodium)

Explanation:

The question is incomplete, the complete question is shown in the image attached.

Answer:

7.69%

Explanation:

The balanced equation of this reaction is shown in the image attached to this answer.

The reaction is redox because we can notice a change in the oxidation number of species from left to right in the reaction equation.

For instance, the oxidation number of oxygen was changed from -1 in H2O2 to zero in O2. Hence H2O2 was oxidized.

To calculate the percentage of H2O2 in the sample;

number of moles of KMnO4 =  137 ml/1000 * 0.230 M = 0.03151 moles of KMnO4

From the reaction equation;

2 moles of permanganate reacts with 5 moles of H2O2

0.03151 moles of permanganate reacts with  0.03151 moles * 5/2 = 0.079 moles of H202

Mass of H2O2 reacted = 0.079 moles of H202 * 34 gmol-1 = 2.69 g

Hence % by mass of H2O2 in the sample = 2.69 g/35 g * 100 = 7.69%

Answer:

0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.

Explanation:

The balanced reaction between tha surfuric acid and iron (III) hydroxide is:

Fe(OH)₃ + 3 H₂SO₄ → Fe(HSO₄)₃ + 3 H₂O

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactants and products participate in the reaction:

Being molarity (M) the number of moles of solute that are dissolved in a given volume:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

then the number of moles can be calculated as:

number of moles= molarity* volume

So, if 58.42 mL ( 0.05842 L) of 0.09756 M iron (III) hydroxide react, then it means that the number of moles that react are:

number of moles= 0.09756 M* 0.05842 L

number of moles= 0.005699 moles

Now it is possible to apply the following rule of three: if by stoichiometry 1 mole of Fe(OH) ₃ reacts with 3 moles of H₂SO₄, then 0.005699 moles of Fe(OH) ₃ with how many moles of H₂SO₄ does it react?

[tex]moles of H_{2} SO_{4} =\frac{0.005699 moles ofFe(OH)_{3}* 3moles of H_{2} SO_{4} }{1mole ofFe(OH)_{3}}[/tex]

moles of H₂SO₄= 0.017097

Being sulfuric acid 0.2860 M, it is replaced in the definition of molarity:

[tex]0.2860M=\frac{0.017097 moles}{volume}[/tex]

Solving for the volume:

[tex]volume=\frac{0.017097 moles}{0.2860 M}[/tex]

volume= 0.05978 mL

0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.

Explanation:

Where's the question?

Answer:

Following are the solution to this question:

Explanation:

In this opinion, Tim Kane believed that its economy can not be badly affected by low manufacturing jobs in 1979, provided, in which an American industrial production had strong potential growth. Their view also opposes whatever Mr. Grove said of lower US employment particularly cos of increased production figures. Their opinion disputes as much as the American.

In Forbes, they wrote that All our industrial production is breaking records with increasing efficiency, despite a low number of industrial workers. Including Mr. grove, he favors beginning for small businesses. It was mainly due to the big advantage of smaller companies or the production of employment.

Answer:

Na2SO4 + Bi(NO3)3 = Bi2(SO4)3 + NaNO3

Answer: [tex][Ne]3s^23p^5[/tex]

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The electrons are filled according to Afbau's rule in order of increasing energies .  Chlorine atom has 17 atomic number of 17 and has 17 electrons. The nearest noble gas is Neon with 10 electrons and thus the electronic configuration in terms of noble gas is:

[tex]Cl:17:[Ne]3s^23p^5[/tex]

The time taken by gas x : 350 s

Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or  

the effusion rates of two gases = the square root of the inverse of their molar masses:  

[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]

Molar mass = 2 x vapour density(VD)

r₁=rate Hydrogen = 280 cm³ / 40 s = 7 cm³/s

M₁=molar mass Hydrogen=2 g/mol

M₂=molar mass gas x=

[tex]\tt 2\times VD=2\times 25=50~g/mol[/tex]

[tex]\tt \dfrac{7}{r_2}=\sqrt{\dfrac{50}{2} }\\\\\dfrac{7}{r_2}=5\\\\r_2=1.4~cm^3/s[/tex]

[tex]\tt r_2=\dfrac{V_2}{t_2}\\\\t_2=\dfrac{V_2}{r_2}\\\\t_2=\dfrac{490~cm^3}{1.4~cm^3/s}\\\\t_2=350~s[/tex]

Answer:

Ok so i know i'm  late but i hope this helps anyone else that sees it.

(not a sample response)

Explanation:

Some of the advantages of Asexual Reproduction include the process requiring less energy and taking less time. Some of the disadvantages of Asexual Reproduction is that there is no variation in the DNA and there is more competition for resources.

Some of the advantages of Sexual Reproduction include variation in DNA and less competition for resources. The disadvantages of Sexual Reproduction include the process requiring more energy and the process being slower.

Answer:

Advantages of sexual reproduction

1. The new organism can have different variations of DNA

2. Can lead to a genetic variation of new offsprings and generations

Disadvantages

1.Takes more energy

2.Takes more time

Advantages of asexual reproduction

1. Takes less energy

2. Takes less time

3. Skips pollination and fertilization

Disadvantages

1.Can't lead to different genetic variations of offspring and generations.

2. DNA is the exact same

Explanation:

I got it right

Answer:

Pollen

Explanation:

bc i take notes and also my sister studies bio

PLZ GIMME BRAINLIEST

Answer:

correct

Explanation:

Answer:

Can be broken down into simpler substances.

Explanation:

Elements are made of atoms, and that is the simplest understood unit of the universe. :) nOw GiB mY 50000 points.

Answer:

Can be broken down into simpler substances

Explanation:

Because atoms cannot be created or destroyed in a chemical reaction

Answer:

the PH would be 12 the person was correct!

Explanation:

Answer:

[tex]0.3456\ \text{M}[/tex]

Explanation:

[tex]V_1[/tex] = Volume of NaOH = 34.56 mL

[tex]V_2[/tex] = Volume of HCl = 25 mL

[tex]M_1[/tex] = Concentration of NaOH = 0.25 M

[tex]M_2[/tex] = Concentration of HCl

When endpoint is reached the number of moles of NaOH will be equal to the number of moles of HCl

[tex]M_1V_1=M_2V_2\\\Rightarrow M_2=\dfrac{M_1V_1}{V_2}\\\Rightarrow M_2=\dfrac{0.25\times 34.56}{25}\\\Rightarrow M_2=0.3456\ \text{M}[/tex]

Concentration of HCl is [tex]0.3456\ \text{M}[/tex].

Answer:

MgI₂, MgO, PbI₄, PbO₂

Explanation:

For an ionic compound to be formed, it must be neutral, that is the total positive charge must be equal to the total negative charge.

Mg²⁺ and I⁻: The neutral ionic compound requires 1 Mg²⁺ and 2 I⁻ and the resulting empirical formula is MgI₂.

Mg²⁺ and O²⁻: The neutral ionic compound requires 1 Mg²⁺ and 1 O²⁻ and the resulting empirical formula is MgO.

Pb⁴⁺ and I⁻: The neutral ionic compound requires 1 Pb⁴⁺ and 4 I⁻ and the resulting empirical formula is PbI₄.

Pb⁴⁺ and O²⁻: The neutral ionic compound requires 1 Pb⁴⁺ and 2 O²⁻ and the resulting empirical formula is PbO₂.

Answer:

You can fill 212 balloons.

Explanation:

First we calculate the helium moles in the small cylinder, using PV=nRT:

141.13 atm * 2.20 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 298.16 K

Then we calculate the number of moles that can fit in a single balloon:

Finally we divide the total number of available moles by the number of moles in a single balloon:

So the answer is that you can fill 212 balloons.

Answer:

00.8755521

Explanation:

Answer:

law of conservation of mass

Explanation:

self explanatory

After the first steps in writing an  chemical equation, the equation is balanced by adding coefficients so that law of conservation of mass is obeyed.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

2.5 grams

Explanation:

you can see it on the graph

The process is replication

In the process of cell division and synthesis of new DNA, the stage after replication is called as transcription at which the DNA segments are copied into a RNA molecule.

Replication is the process of dividing the a DNA segment into two equivalent strands. After replication, these two strands will pair with their complementary  RNA strands and the second stage is called transcription.

The process of transcribing a section of DNA into RNA is known as transcription. Messenger RNA is created when specific DNA sequences are translated into RNA molecules that can encode proteins (mRNA).

Non-coding RNAs are RNA molecules that contain copies of other DNA sequences (ncRNAs). The RNA is termed as messenger RNA (mRNA) if the stretch of DNA is translated into an RNA molecule that encodes a protein. The mRNA then acts as a template for the translation of the protein.

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Answer: 721 grams

Explanation:

The mass of 16.6 x 10²³ molecules of barium nitrate is 721 grams.

Moles of substance = no. of molecules ÷ 6.02 × 10²³

no. of moles = 16.6 x 10²³ ÷ 6.02 × 10²³

no. of moles = 2.76moles

Molar mass of Ba(NO3)2 = 261.34 g/mol

Mass of barium nitrate = 261.34 × 2.76

Mass of barium nitrate = 721g

Therefore, the mass of 16.6 x 10²³ molecules of barium nitrate is 721 grams.

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Answer:

yessirrrrrrrrrrrrrr

Explanation:lets get ma boa

Answer:

chemistry, deposition occurs when molecules settle out of a solution. Deposition can be viewed as a reverse process to dissolution or particle re-entrainment. It is a phase change from the gaseous state to a solid, without passing through the liquid state, also called re-sublimation.

Explanation:

Examples include beaches, deltas, glacial moraines, sand dunes and salt domes. In severely cold temperatures frost will form on windows because the water vapor in the air comes into contact with a window and immediately forms ice without ever forming liquid water.

Answer:a substance made by mixing other substances together.

Explanation:trust me

Answer: i would say north pole because the sunlight has to change directions to reach it if that makes since

Explanation: sorry if im wrong

Answer:

demos los

Explanation:

Answer: Renewable resources can be used again and again. Non-Renewable resources can be used once

Explanation: Sunlight, water, wind, are the renewable resources

Petrol, coal, natural gas are  examples of non-renewable resources.

Answer:yes

Explanation:

Both diamond and graphite are the allotropes of pure carbon (Carbon-12), they have different properties due to different types of arrangement of carbon atoms within their structures.

Diamonds have a strong three-dimensional network of carbon atoms while Graphites have a two-dimensional sheet-like structure. In a diamond, the network is formed because of the presence of covalent bonds between the carbon atoms. In graphite, bonds are generally due to weak Van der Waal's forces of attraction.

Therefore, diamonds are hard in nature while graphites are soft in nature. The molecules in diamonds are closely packed, as a result, they have high density. But in graphite, there is a large gap between molecules so they have low density.

As the diamonds have no presence of pi electrons they do not conduct electricity. But, there is the presence of pi electrons in graphite so they conduct electricity.

Therefore, the existence of isotopes does not explain the difference in properties between diamond and graphite

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Answer:

0.692

Explanation:

To solve this problem we can use Henderson-Hasselbach's (H-H) equation:

In which pOH can be calculated from the pH:

Then we use the H-H equation to calculate[tex]\frac{[NH_4Cl]}{[NH_3]}[/tex]:

As the problem asks for the ratio of ammonia to ammonium chloride, we invert [tex]\frac{[NH_4Cl]}{[NH_3]}[/tex]:

The mole ratio of ammonia to ammonium chloride in a buffer with a pH of 9.09 is 0.692.

Henderson Hasselbalch equation for the weak base (NH₃) and for their conjugate acid (NH₄Cl) will be written as:

pOH = pKb + log[NH₄Cl]/[NH₃], where

pKb = base dissociation constant = 4.75

pOH will be calculated from the given value of pH as:

pH + pOH = 14

pOH = 14 - 9.09 = 4.91

Now we these values in the above equation and we get,

4.91 = 4.75 + log[NH₄Cl]/[NH₃]

log[NH₄Cl]/[NH₃] = 0.16

[NH₄Cl]/[NH₃] = 10⁰°¹⁶

[NH₄Cl]/[NH₃] = 1.44

[NH₃]/[NH₄Cl] = 1/1.44

[NH₃]/[NH₄Cl] = 0.692

Hence, required mole ratio is 0.692.

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