1. Identify the correct product to the following reactants.
HCI + NaOH->
a. NaH + COOH
b. NaCl + H2O
C. NaCl(OH)

N = n x No

n = N/No

No = avogadro's number, 6.02 x 10²³

[tex]\tt \dfrac{3.45\times 10^{23}}{6.02\times 10^{23}}=0.573[/tex]

Answer:

4.94x10^24 atoms Zn

Explanation:

By definition, there are 6.022x10^23 atoms in a mole of a substance.    This is a conversion factor:

(6.022x10^23 atoms/mole)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

(8.2 moles Zn)* (6.022x10^23 atoms/mole)  =    4.94x10^24 atoms Zn                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

Answer:

1) The standard enthalpy change of neutralization is the enthalpy change when solutions of an acid and an alkali react together under standard conditions to produce 1 mole of water. Notice that enthalpy change of neutralization is always measured per mole of water formed. Enthalpy changes of neutralization are always negative - heat is released when an acid and and alkali react. For reactions involving strong acids and alkalis, the values are always very closely similar, with values between -57 and -58 kJ mol-1. That varies slightly depending on the acid-alkali combination (and also on what source you look it up in!).

2)same of n1

[tex] \huge \qquad \underline{ \boxed{ \sf Answer}}[/tex]

Here's the Explanation ~

Loudness depends on Amplitude,

Pitch depends on frequency,

Therefore, the correct choice is :

A. low frequency and high amplitude

Fun fact ( added by me )

Generally guys have low pitched voice, so it's actually easy to understand what they say even if they speak fast, but in case of girls there's a shrill type of voice with High pitch ( frequency ) such that sometimes it's hard to understand what they are saying if they are fast, also it's kind of irritating. [ don't get serious about it lol ]

The numerical value of equilibrium constant depends on

As the Temperature increases the value of equilibrium constant decreases and when the Temperature decreases the equilibrium of constant increases. That means they are inversely proportional..

The numerical value of the equilibrium constant depends on the temperature (Option 1).

The equilibrium constant refers to the exact value in a chemical reaction when products and reactants are found in a state of equilibrium.

In conclusion, the numerical value of the equilibrium constant depends on the temperature (Option 1).

Learn more about the equilibrium constant here:

https://brainly.com/question/12858312

Answer:

Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)

Explanation:

Answer:

2, I believe.

Explanation:

In the cO2 molecule, each oxygen atom has two lone pairs of electrons. The carbon atom has no lone pairs.

Explanation:

In the cO2

molecule, each oxygen atom has two lone pairs of electrons. The carbon atom has no lone pairs. The carbon-oxygen bonds are double bonds.

Explanation:

Concentration means that you concentrate really gard on something abd can't see others around you.

Answer:

A net force acting on an object will change its motion. This means that a net force will change the kinetic energy of an object. The greater the force, the greater the change in motion and the kinetic energy of the object. Objects moving at a constant speed will have a constant kinetic energy.

Dependent variables are those that need a stimulus to present themselves. The independent variables are those that do not need a stimulus to present themselves and the control variables are the elements that remain unchanged throughout the experiment.

To increase the understanding of these variables, we can use as an example an experiment that seeks to evaluate the influence of root growth of transgenic corn with water stress. In this experiment, five plants of transgenic corn will suffer different levels of water stress, while one plant of the same corn will not suffer this stress and will be watered normally.

According to this, root growth is a variable that needs a stimulus to present itself, so this is the dependent variable. Water stress does not need any stimulus, being the independent variable. Finally, the corn plant that will not suffer any type of stress will remain unchanged throughout the experiment, being the control variable.

You didn't show the experiments your question refers to, which prevents me from providing an exact answer, but I hope the information above can help you.

More information about dependent and independent variables at the link:

https://brainly.com/question/967776

Answer:

Dependent variables are those that need a stimulus to present themselves. The independent variables are those that do not need a stimulus to present themselves and the control variables are the elements that remain unchanged throughout the experiment.

Importance of variables

They present the relationship between the elements of the experiment.

Allow hypotheses to be tested.

Allows comparisons between experimental treatments.

They encourage the evaluation of experimental data.

To increase the understanding of these variables, we can use as an example an experiment that seeks to evaluate the influence of root growth of transgenic corn with water stress. In this experiment, five plants of transgenic corn will suffer different levels of water stress, while one plant of the same corn will not suffer this stress and will be watered normally.

According to this, root growth is a variable that needs a stimulus to present itself, so this is the dependent variable. Water stress does not need any stimulus, being the independent variable. Finally, the corn plant that will not suffer any type of stress will remain unchanged throughout the experiment, being the control variable.

You didn't show the experiments your question refers to, which prevents me from providing an exact answer, but I hope the information above can help you.

Explanation:

The density has been given as the mass of the substance per volume of the solution. The mass of citric acid in the bottle has been 1.22 grams.

Percent mass can be given as the mass of substance in the total mass of the solution.

The volume of the face serum has been 250 mL, and the density is 0.979 g/mL.

The mass of face serum in the bottle has been:

[tex]\rm Density=\dfrac{Mass}{Volume}\\ 0.979\;g/mL=\dfrac{Mass}{250\;mL}\\ Mass=244.75\;g[/tex]

The total mass of face serum has been 244.75 grams.

The percent mass of citric acid in face serum is 0.5%. This states the presence of 0.5-gram citric acids in 100 grams sample.

The mass of citric acid in the face serum sample is given as:

[tex]\rm 100\;gram\;sample=0.5\;g\;H_3C_6H_5O_7\\\\244.75\;grams\;sample=\dfrac{0.5}{100}\;\times\;244.75\;grams\; H_3C_6H_5O_7\\\\244.75\;grams\;sample=1.22\;grams\;H_3C_6H_5O_7[/tex]

The mass of citric acid present in 250 mL serum sample has been 1.22 grams.

Learn more about percent mass, here:

https://brainly.com/question/5394922

Answer:

GAS strand

Explanation:

Used to standarized strand to make solution to fasten the calculation

The properties of substances can be used to put the into groups.

In chemistry, it is often necessary to put substances into groups based  on similarity in their properties. This is what led to the idea of a periodic table of elements.

Similarly, when we have unknown substances, we can group them according to the similarities in their properties.

Learn more about properties of substances: https://brainly.com/question/19886211

Answer:

An input of heat energy Yr don't you know stupied

Answer:

1 mole of CO2 has 6.02 x 10^23 molecules of CO2. Say x moles of CO2 has 3.0x10^23 molecules of CO2. Therefore x = 3/6.02 = 0.50. M = 0.50 * (12 + 2x16) = 0.50 * 44 = 22g.

The amount of the solute present in the given solution is called the concentration. The best way to represent the concentration of the solution is [tex]\rm [K_{2}CrO_{4}].[/tex]

Molar concentration is the molarity of the solution that is the measure of the concentration of the solute dissolved in the solution.

The formula for calculating molar concentration is given as,

[tex]\rm Molarity = \dfrac{\text{moles of solute}}{\text{Solution in L}}[/tex]

The concentration of any substance is represented in the square bracket like [tex]\rm [X][/tex] or  [tex]\rm [K_{2}CrO_{4}].[/tex]

Therefore, option B. [tex]\rm [K_{2}CrO_{4}][/tex] is the representation of the concentration.

Learn more about the molarity here:

https://brainly.com/question/1532164

Answer: [K2CrO4]

Explanation:

Answer:

C

Explanation:

Because i got a 100% on it

Answer:

photosynthesis

Explanation:

Bc it is

Answer:

The concept of lewis acids and bases can explain the acidic nature of CO2. A lewis acid is a compound which can accept an electron pair whereas a lewis base is a compound which can donate an electron pair. CO2 acts as a lewis acid.

Answer:

one amino acid

Explanation: its right

Answer:

Calcium helps to give the plant structure

Explanation:

The true statements about Calcium are ; ( A and C )

Calcium is a macronutrient that helps in the production of plant tissues and also enables the replacement of deads tissues and growth of plants. It helps to give plants structure by holding toether the cell walls of plants.

Hence we can conclude that the   true statements about Calcium are Calcium is a macronutrient  and Calcium helps to give the plant structure.

Learn more about Calcium in plants :  https://brainly.com/question/8901446

Answer:

0.10417 mol

Explanation:

first step you find the mr of ammonium carbonate { (NH4)2CO3 }

mr of (NH4)2CO3:

=(2×Ar of N) + (8×Ar of H) + (1×Ar of C) + ( 3× Ar of O)

=(2×14) + (8×1) + (1×12) + (3×16)

= 28 + 8 + 12 + 48

=96

no of moles = mass ÷ mr

= 10 ÷ 96

= 0.10417 mol

Answer:

The answer to your question is ∆Hrxm= – 23.9 kJ

Answer:

Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. ... Oxygen is normally found as a

[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]

The balanced equation for given reaction is ~

[tex] \sf 2 \: Al(OH)_3 +3 \: H_2SO_4 = Al_2(SO_4)_3 +6 H_2O[/tex]

And here, the Coefficient of H2O is 6

[tex]\\ \rm\Rrightarrow 2Al(OH)_3+3H_2SO_4\longrightarrow Al_2(SO_4)_3+6H_2O[/tex]

on both sides

Hence balanced

Coefficient of H_2O is 6

I would believe the answer is sound energy because the sound that orchestral gives off, gives off some energy even though it isn't necessarily comparable to other sources of energy.

Hope that helped!

Answer:

yes yes yes yes yes yes yes yes yes yes

Answer:

C. A much larger amount of silk might be needed to produce the same effect

Explanation:

As you may know it will take a lot of silk to make bullet proof fabric out of it.

Answer:

I Guess C

Explanation:

The availability of spider silk is not enough for what is needed, so i believe C is the right answer. But that means that B is also a bit correct .

Answer:

(b) Soft drink

Explanation:

Because soft drinks contain carbonic acid, which reacts with the iron nail. An iron nail kept in a soft drink will lose its shine and appear dull. Because mustard oil, coconut oil, and kerosene have no reaction with iron nails, they do not lose their shine when maintained in these solutions.