KBr is the formula for an ionic compound. The fact that neither symbol is followed by a subscript means that there is a(an) of ions in the compound ​

Answers

Answer 1

Answer:

equal number of ions

Explanation:

They cancel each other out that's why there is none


Related Questions

How do surface currents differ from deep ocean currents? Deepwater currents are dependent on the wind and landmasses. Deepwater currents are dependent on temperature and salinity. Deep ocean currents are affected by salinity and wind. None of the above​

Answers

Answer:

surface currents are caused by winds : deep water currents are caused by difference in water density.

I guess the answer of your question is this

Answer:

Deepwater currents are dependent on temperature and salinity.

Explanation:

A mixture results in a ___________________________ change.

Answers

Answer:

physical

Explanation:

Hydrazine (N2H4) and dinitrogen tetroxide (N2O4) form a self-igniting mixture that has been used as a rocket propellant. The reaction products are N2 and H2O. Part A Write a balanced chemical equation for this reaction. Express your answer as a chemical equation. nothing A chemical reaction does not occur for this question. Request Answer Part B What is being oxidized, and what is being reduced

Answers

Answer:

2N₂H₄+N₂O₄→3N₂+4H₂O; N₂H₄ gets oxidized, N₂O₄ gets reduced.

Explanation:

Part A

They tell us what substances react to form what products, so we can write an unbalanced chemical equation from those substances.

N₂H₄+N₂O₄→N₂+H₂O

To balance this equation, we need to make it so there is an even amount of each element on both sides of the reaction. We can do this by multiplying the amount of each substance by adding a coefficient in front of it.

2N₂H₄+N₂O₄→3N₂+4H₂O

Part B

To identify what is being oxidized and what is being reduced, look at the oxidation charges of each element.

N₂H₄ gets oxidized, N₂O₄ gets reduced.

what is the purpose of time on analyzing fluid viscosity ​

Answers

Answer:

Gathering viscosity data on a material gives manufacturers the ability to predict how the material will behave in the real world.

Example:

If toothpaste does not have the correct viscosity, it can either be too difficult to pump out from the tube, or pump out too much.

Chromatin consists of long strands of material located within the nuclear membrane.

True
False



(also if u want brainlist's answer this question and ask a random question so u can give me brainlist back , deal? (i just need 2 people to answer and ill pick who gets it))

Answers

Answer:

True

Explanation:

14. Explain, in terms of ions, why a 10.0-milliliter sample of 0.10 M NH4Cl(aq) is a poorer conductor of
electricity than a 10.0-milliliter sample of the 0.30 M NH4Cl(aq).
Neeed now

Answers

Ionic compounds conduct electricity when dissolved in water, because the free-floating ions can carry charge. The more ions you have, the more readily the solution will carry that charge. 10.0 mL of 0.10 M NH4Cl has only 0.001 mol of NH4+ and 0.001 mol of Cl-, whereas 10.0 mL of 0.30 NH4Cl has 0.003 mol of NH4+ and 0.003 mol of Cl-. The 0.10 M sample is a poorer conducted of electricity because it has less ions in solution.

5. Choose the best description of a reversible reaction.
a reaction that occurs in both directions at the same time
a reaction that has used up all the reactants and has stopped
a reaction that can only proceed to the right
a reaction that can only proceed to the left

Answers

Answer:

A reaction that can only move towards the right.

Explanation:

For a reversible reaction when one of the products of the reaction is removed the reaction moves towards right hand side. More and more reactants will be converted into products. This will nullify the effect of removal of product.

what is the difference between crystalline and amorphous solid..???​

Answers

Answer:

Crystalline solids have regular ordered arrays of components held together by uniform intermolecular forces, whereas the components of amorphous solids are not arranged in regular arrays.

Explanation:

Ammonia and oxygen react to form nitrogen monoxide and water, like this:
Also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition:
Compound pressure at equilibrium
NH_3 65.3 atm
O_2 7.79 atm
NO 12.1 atm
H_2O 65.8 atm
calculate the value of the equilibrium constant Kp for this reaction. Round your answer to 2 significant figures.
Kp=

Answers

Answer: The value of the equilibrium constant Kp for this reaction is [tex]3.3\times 10^3[/tex]

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K  

For the given balanced chemical reaction:

[tex]4NH_3(g)+5O_2(g)\rightarrow 4NO(g)+6H_2O(g)[/tex]

The expression for [tex]K_p[/tex] is written as:

[tex]K_p=\frac{[p_{NO}]^4\times [p_{H_2O}]^6}{[p_{NH_3}]^4\times [p_{O_2}]^5}[/tex]

[tex]K_p=\frac{(12.1)^4\times (65.8)^6}{(65.3)^4\times (7.79)^5}[/tex]

[tex]K_p=3.3\times 10^3[/tex]

The value of the equilibrium constant Kp for this reaction is [tex]3.3\times 10^3[/tex]

What is the pressure (in atm) in a 5.00 L tank with 9.00 grams of oxygen gas at 350 K?

Answers

Answer:

1.61 atm

Explanation:

Using general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

From the information provided in this question,

V = 5.00L

T = 350K

mass of O2 = 9.00g

Using mole = mass/molar mass

Molar mass of O2 = 16(2) = 32g/mol

mole = 9/32

mole = 0.28mol

Using PV = nRT

P = nRT/V

P = 0.28 × 0.0821 × 350/5

P = 8.0458/5

P = 1.609

Pressure = 1.61 atm

The pressure of the oxygen gas at the given temperature and volume is 1.61 atm.

The given parameters;

volume of the gas, V = 5 Lmass of the oxygen gas, m = 9 gtemperature of the gas, T = 350 K

The number of the moles of the given gas is calculated as follows;

[tex]moles = \frac{m}{M} \\\\moles = \frac{9}{32} \\\\moles = 0.28 \ mol[/tex]

The pressure of the gas is calculated as follows;

[tex]PV = nRT\\\\P = \frac{nRT}{V} \\\\P = \frac{0.28 \times 0.0821 \times 350}{5} \\\\P = 1.61 \ atm[/tex]

Thus, the pressure of the oxygen gas at the given temperature and volume is 1.61 atm.

Learn more here:https://brainly.com/question/21912477

Is that flirting? I'm not sure and I really need to know-

Answers

Answer:

I mean ig it is, but i dk

Explanation:

Ellie started her reaction between the KMnO4 and malonic acid by first heating the two solutions in the hot water bath. She then removed the test tubes from the water bath and poured the KMnO4 into the 75-mL test tube containing the malonic acid. She mixed the solution, placed it back into the water bath, then started the timer. For the data collected at 75 oC, indicate how the process explained above impacts the reaction time.a. The time recorded in the lab notebook is the true reaction time because the reaction only starts after the timer is started b. The time recorded in the lab notebook is longer than the true reaction time because the reaction starts the moment the two solutions were mixed c. The time recorded in the lab notebook is the true reaction time because the reaction only starts after the mixture is placed back into the hot water bath d. The time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed

Answers

Answer:

The time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed

Explanation:

A chemical reaction is "a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction" (Oxford dictionary).

A chemical reaction begins immediately the reactants are mixed together in a reaction vessel because the particles of the reactants immediately begin to collide with each other. There is no lost time before reactions begins!

This implies that, the time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed.

Answer:

the first one is B. and E. and the second is A., B., and D. on edge 2023

Explanation:

Determine the number of atoms in 3.14 g gold

Answers

The answer for sure is 95.99922

send a pic of the question

Answers

your photo is blank?

What is the phase label on H3O+(?)

A. aq
B. s
C. e
D. g
E.

Answers

I think it’s A. aq but your choice.

Aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. Suppose 15.7 g of hydrochloric acid is mixed with 27. g of sodium hydroxide. Calculate the maximum mass of sodium chloride that could be produced by the chemical reaction.

Answers

Answer:

25.155 gram

Explanation:

HCl(aq.) + NaOH(aq.) ⇒ NaCl + H2O

According the above equation equal number of moles of reactant are producing same number of moles of products.

Now, no. mole of HCl = 15.7/(1+35.5) = 0.43 moles

no. of moles of NaOH = 27/(23+16+1) = 0.675 moles

Since  the  amount  of  sodium  hydroxide  exceeds  the  amount  of  hydrochloric  acid,  the maximum amount of each substance participating in the reaction is HClν ν  0.43 moles .Therefore, the maximum amount of NaCl  that can be produced is as follow

= (23+35.5)×0.43 = 25.155 gram

An antacid tablet weighs 2.10 grams. It requires 45.67 mL of 0.105 M of HCI solution to react completely with the carbonate present in the tablet. Determine the mass of CaCO3 present in the tablet?

Answers

Answer:

≅ 0.240 grams (3 sig. figs.)

Explanation:

Rxn:   CaCO₃  +          2HCl              => CaCl₂ + H₂O + CO₂

Given:    ?g          45.67ml(0.105M)

                            = 0.04567L x 0.105 mole/L

                            =  0.0048 mole HCl

Rxn ratio for CaCO₃ to HCl is 1:2

∴ moles CaCO₃ consumed = 1/2 of moles HCl used

=> 1/2(0.0048)mole CaCO₃ used = 0.0024 mole CaCO₃

mass CaCO₃ = 0.0024 mole CaCO₃  x  100.09 grams CaCO₃/mole CaCO₃

= 0.23998 grams CaCO₃ (calculator answer)

≅ 0.240 grams (3 sig. figs.)

Which of the following is true according the the Arrhenius theory of acids?
A strong acid increases the OH-ion concentration in an aqueous solution.
A strong acid decreases the OH-ion concentration in an aqueous solution.
O A strong acid decreases the H+ and OH-ion concentration in an aqueous
solution.
A strong acid increases the H+ ion concentration in an aqueous solution.

Answers

The correct answer is D, a strong acid increases H+ concentration in an aqueous solution, because strong acids dissociate 100% in water to produce the Conjugate Acid H+ and the Conjugate Base.

For example
HCl———>H+ + Cl-

Most atoms follow the octet rule meaning they need ------ electrons to fill their valence shells. One important exception is H which only needs ------------ electrons to fill its valence shell.




full they blank

Answers

Answer:

The octet rule means that atoms need a total of 8 valence electrons to fill their valence shell. Hydrogen only needs two to fill its valence shell.

Explanation:

All atoms except for hydrogen can hold a total of 8 valence electrons in their outer energy levels (2 in the s level, 6 in the p level). Hydrogen only has two electrons total, so it does not require more than the s level and two electrons to have a full valence.

1. 8 (oct means that eight, good way to remember this!)
2. hydrogen has ONE valence electron!

hope this helps :)

How many grams of solid NaOH are needed to prepare 200. mL of a 5.00% by
volume NaOH solution

A) 8
B) 10
C) 9
D) 7

Answers

Answer:

10

Explanation:

Each 100 ml should have 5 solid naom to have 5%,

For 200 ml: 200 *5%=10

The grams of Solid NaOH needed is : ( B )  10 grams

Volume of solution = 200 mL

Percentage of solid NaOH in solution = 5.0%

Therefore the grams of solid NaOH required to prepare a 200mL solution that contains 5.0% solid will be :

5% * 200 mL

= 10 grams

Hence we can conclude that the grams of solid NaOH needed is 10 grams

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Does anyone know the answer I need help

Answers

Answer:

Can you put other picture because the picture is blurry? please

Explanation:

Calculate the molarity of a MgSO: solution
prepared by adding 0.37 moles of MgSO, to
enough water to make 4.9 L of solution.
Answer in umits of M.

Answers

Answer:

is

Explanation:

the explant

What is the pH of a 0.08 M solution of Ca(OH),?

Answers

Answer:

pH = 12.20

Explanation:

Ca(OH)2 is a strong base, so it dissociates completely. A 0.08 M solution of Ca(OH)2 is 0.16 M OH-, since every mole of Ca(OH)2 has 2 OH-.

Calculate pOH using [OH-] = 0.16 M

pOH = -log(0.16) = 0.80

pH = 14 - pOH = 14 - 0.80 = 12.20

Taking into account the definition of pH and pOH, the pH of a 0.08 M solution of Ca(OH)₂ is 13.21

pH

First of all, pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

pOH

Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

Relationship between pH and pOH

The following relationship can be established between pH and pOH:

pOH + pH= 14

This case

A strong base is one that dissociates completely in water, that is, it contributes the maximum number of OH- ions.

Ca(OH)₂ is a strong base that for each Ca²⁺ cation there are two OH⁻ anions and in which for each mole of Ca(OH)₂ two moles of OH⁻ are formed.

So: [OH⁻]= 2×[Ca(OH)₂]

[OH⁻]= 2×0.08 M

[OH⁻]= 0.16 M

Replacing in the definition of pOH:

pOH= - log (0.16 M)

Solving:

pOH= 0.79

Finally, considering the relationship between pH and pOH:

0.79 + pH= 14

pH= 14 - 0.79

pH= 13.21

In summary, the pH of a 0.08 M solution of Ca(OH)₂ is 13.21

Learn more about pH and pOH:

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GIVING BRAINLEST ASAP IM BEING TIMED
Two adaptations to plants are described below:


Adaptation 1: A hornwort is a nonflowering plant that produces a large number of spores instead of seeds.

Adaptation 2: A kangaroo paw has tiny, woolly hairs on it that help it hold onto water droplets.


Which statement is true about these adaptations?


Both are showing adaptations to their physical characteristics.


Both are showing adaptations to their life cycles.


Adaptation 1 is an adaptation to physical characteristics, Adaptation 2 is an adaptation to life cycle.


Adaptation 1 is an adaptation to life cycle, Adaptation 2 is an adaptation to physical characteristics.

Answers

Answer:

Adaptation 1 is an adaptation to life cycle, Adaptation 2 is an adaptation to physical characteristics.

Explanation:

Answer:

Adaptation 1: A hornwort is a nonflowering plant that produces a large number of spores instead of seeds

HURRY PLEASE!! Chelsea is expecting a call from her sister in New York at 1:00 p.m. Pacific time. What time will it be in New York when Chelsea's sister calls?

1:00 p.m.
9:00 a.m.
4:00 p.m.
10:00 a.m.

Answers

10:00 but could you please help me too?

Answer:

it will be 4:00 pm

Explanation:

subtracting eight hours from Coordinated

A 5.00 g piece of metal is heated to 100.0 C then placed in a beaker containing 20.0 g of water at 10.0 C. The temperature of the water rises to 15.0 C. Calculate the specific heat of the metal

Answers

Calculate the heat gained by the water first.

q = mCpΔT
m = 20.0 g
Cp = 4.186 J/g°C
ΔT = T(final) - T(initial) = 15.0°C - 10.0°C = 5.0°C

q = (20.0)(4.186)(5.0) = 419 J

This is equal to the heat lost by the metal, so calculate Cp for the metal, given:
q = -419 J (negative because heat was lost)
m = 5.00 g
ΔT = 15.0°C - 100.0°C = -85.0°C (negative because the temperature decreased)

q = mCpΔT —> Solve for Cp —> Cp = q/mΔT

Cp = -419 / (5.00 • -85.0) = 0.986 J/g°C

How many molecules are in 87.8 moles of CO2?

Answers

Answer:

5.29*10^25 molecules CO₂

Explanation:

Use Avogadro's Number: 6.02*10^23

87.8 mol CO₂ x 6.02*10^23 molecules CO₂/1 mol CO₂ = 5.29*10^25 molecules CO₂

Litmus is an example of an indicator, a substance that changes color depending on its pH.

a. True
b. False

Answers

True litmus paper can determine pH

how do I do this I’m confused

Answers

by using pro.gram..

[tex]{\huge{\blue{\underline{\underline{ ═══════════}}}}}[/tex]

[tex]{\huge{\pink{\underline{\underline{❑❑❑❑❑❑❑❑❑~}}}}}[/tex]

[tex]{\huge{\orange{\underline{\underline{﹌﹌﹌﹌﹌﹌﹌﹌﹌♪}}}}}[/tex]

[tex]{\huge{\purple{\underline{\underline{✎﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏}}}}}[/tex]

Why glucose (monosaccharide) and maltose (disaccharide) give positive Benedict test?

Answers

Answer:

please give me brainlist and follow

Explanation:

Substance in water + 3 mL Benedict's solution, then boil for few minutes and allow to cool. The common disaccharides lactose and maltose are directly detected by Benedict's reagent because each contains a glucose with a free reducing aldehyde moiety after isomerization.

Glucose and maltose give a positive Benedict test because they have a free carbonyl group to undergo oxidation.

Explanation:

The monosaccharides are sugars that cannot be further hydrolyzed into simpler sugars like glucose, fructose, ma, etc.The disaccharides are sugars that on hydrolysis give two monosaccharide units like sucrose, lactose, maltose, etc.The polysaccharides are sugars that on hydrolysis give more than two monosaccharide units like sucrose, lactose, maltose, etc.Reducing sugars are which have a free carbonyl group that oxidizes into a carboxylic acid and reduces Benedict reagent like glucose, maltose, etc.Non-reducing sugars which don't have a free carbonyl group like sucrose, all polysaccharides, etc.Benedict test is a chemical test performed to test the presence of reducing sugars.The Benedict reagent is a complex made up of sodium citrate, sodium carbonate, and copper sulfate pentahydrate.The positive test for reducing sugar will be the red coloration of the solution due to the formation of copper(II) oxide.

So, from this, we can conclude that glucose and maltose give a positive Benedict test because they have a free carbonyl group to undergo oxidation.

Learn more about carbohydrates:

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