Which metal does not react with dilute hydrochloric acid?
A. Iron
B. Sodium
C. Zinc
D. Copper

Answers

Answer 1

Answer:

D. Copper

Explanation:

Less reactive metals like Copper, gold and silver does not react with dilute HCl to produce Hydrogen gas.

Answer 2

Answer:

D. Copper

Explanation:

Copper is less reactive than Hydrogen.


Related Questions

Q4: People have concerns about the use of slash and burn partly because it affects the carbon cycle in multiple ways. What are two of those ways

Answers

From what we know, we can confirm that people have concerns about the use of slash and burn because it creates more CO2 and decreases the natural ability to remove it from the air.

Why is slash and burn so environmentally harmful?

This has to do with CO2 emissions. The slash and burn technique involves slashing away and burning large areas of green land in order to create farmland. This creates large amounts of CO2 through combustion that are released into the atmosphere. This also removes plants that act as a natural filter for CO2 in the atmosphere, limiting the possibility of a natural recovery.

Therefore, we can confirm that People have concerns about the use of slash and burn because it creates more CO2 and decreases the natural ability to remove it from the air.

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Given the following equation: 2H2O 2H2 +0g What mass of oxygen would form from 5 moles of water?​

Answers

Answer:

Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.

Explanation:

What are properties of a base

Answers

Maybe this we’ll help?

Answer:

base taste bitterbase feel so spy slippery to touchbase turn wet red litmus paper blue

The table below contains concentration and rate data for a reaction involving three reactants. Use these data to determine the overall order of the reaction and the order with respect to M, N, and P.

Answers

Answer:

The order of reaction with respect to M, N, and P are 1, 0, and 3, respectively.

The overall order of reaction is 4.

Explanation:

We are given a table containing the concentrations of M, N, P, and the rate of the reaction, and we want to determine the overall order of the reaction and the order with respect to each reactant.

To do so, we can select two experiments from the list where two of the reactant concentrations are held constant and only one changes.

From trials 1 and 2, we can see that holding [N] and [P] constant while doubling [M] doubles the rate.

Therefore, because the rate is directly proportional to M, the reaction is first order with respect to M.

From trials 2 and 3, we can see that holding [M] and [P] constant while doubling [N] does not affect the rate.

Therefore, the reaction is zero order with respect to N.

From trials 1 and 4, we can see that holding [M] and [N] constant and doubling [P] leads to a eight-fold increase (2.6/0.32 ≈ 8).

Therefore, the reaction is third order with respect to P (2³ = 8).

Hence, our rate law is:
[tex]\displaystyle \text{Rate} = k[M]^1[N]^0[P]^3[/tex]

Where the order of reaction with respect to M, N, and P are 1, 0, and 3, respectively.

And the overall order is the sum of each individual reaction orders, or 4.

I NEED TOUR HELP, PLEASE.
G. A gas is at currently at STP. What volume will the
gas have at 100°C and 5.0 atm?

Answers

It would be 5.0 more in i did this

Why is nitrate important in the ocean? How is it used biologically in the ocean?

Answers

Nitrate is the main nitrogenous compound utilized by primary producers in the ocean; it is a major nutrient required for photosynthesis . Note that in this context, a nutrient refers to a chemical needed to support photosynthesis and primary production .

For each of these equations, predict the effects of temperature on the spontaneity of the reaction.
2N2O(g) → 2N2(g) + O2(9)
AH<0; AS > 0
A
H
A
S
AG
Spontaneity
+
+
H20(1) ► H2O(9)
AH> 0; AS >
-
+
302(9) ► 203(9)
AH >0; AS < 0
+
+ or -
nonspontaneous for
all T
spontaneous for all T
spontaneous at high
т
nonspontaneous at
low T
spontaneous at low T
nonspontaneous at
high T
C(s) + 2Cl2(g) → CCl4(9)
AH<0; AS < 0
+ or -
DONE

Answers

The spontaneity of a reaction depends on the temperature, enthalpy and entropy.

What is spontaneity of a reaction?

A reaction is said to be spontaneous if it can proceed on its own without a further input of energy.

In the first case, when the enthalpy is less than zero and the entropy is greater than zero, the reaction is spontaneous at all temperatures.

In the second case, when the enthalpy greater than zero and the entropy is greater than zero, the reaction needs to proceed at high temperatures to be spontaneous.

In the third case, when the enthalpy is greater than zero and the entropy is less than zero, the reaction ought to proceed at low temperature in order to be spontaneous.

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Answer:

1.Spontaneous at all temperatures

2. Spontaneous only at high temperatures

3. Non spontaneous at all temperatures

4. Spontaneous only at low temperatures

Explanation:

Just did it on edge

Someone can help me please??

Answers

Explanation:

tbh I really don't know but

Caesium is in period 6 group 1. Would you expect caesium to have a higher or lower melting point than rubidium? give a reason for your answer

Answers

Answer:

A higher melting point than rubidium

Explanation:

Since Caesium has very strong bond btwn atoms hence requires high energy to break causing it to have a high melting point than rubidium

Answer:

Caesium would have a lower than Rubidium.

Explanation:

The reason is the periodic order.

30) The number of calories needed to raise the temperature of 32 g of water from 12°C to 54 °C is A) 380 cal B) 1.3 cal C) 1300 cal D) 1700 cal E) 0.76 cal ​

Answers

5,600 J would be the answer

Explanation:
Joules = mass x specific heat x temperature change
32 x 4.184 x (54 - 12)
= 133.888 x 42
= 5,623.296
(significant figures => 5,600)

What is the coefficient for lead (II) carbonate

Answers

This is dependent on the equation.

Why are humans more susceptible to concussions than bighorn sheep and woodpeckers?

Answers

Answer:

there is a gap in the human brain and the skull filled with fluid. woodpecker and bighorn sheep do not have this, so the brain doesn't recoil and hit the skull.

1. A 0.338-g sample of antimony was completely reacted with 0.295 g of chlorine gas to form antimony chloride. Determine the empirical formula of the antimony chloride.

Answers

The empirical formula of the antimony chloride is SbCl₃

Data obtained from the question Antimony (Sb) = 0.338 gChlorine (Cl) = 0.295 gEmpirical formula =?

How to determine the empirical formula

Divide by their molar mass

Sb = 0.338 / 122 = 0.0028

Cl = 0.295 / 35.5 = 0.0083

Divide by the smallest

Sb = 0.0028 / 0.0028 = 1

Cl = 0.0083 / 0.0028 = 3

Thus, the empirical formula of the compound is SbCl₃

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How do you find the protons , neurons and electrons of an element ?

Answers

Answer:

For any element,

Atomic Number (Z) = The number of protons (P⁺) = The number of electrons (e⁻)

Hence,

Z = P⁺ = e⁻

For Neutron,

Mass number (A) – Atomic Number (Z)

N = A Z

For Examples :-Oxygen atom (O)Atomic Number = 8Proton = 8Electron = 8Mass Number = 16Neutron = 16 – 8 = 8

 

-TheUnknownScientist 72

when an impurity is added to pure water what happens to the boiling point of the mixture?

Answers

Boiling point of water is 100 degree Celsius at mean sea level. Boiling point is related to the vapour pressure of the solution. On adding an impurity, the vapor pressure of solution decreases. With an increase in concentration of solute, vapour pressure decreases, hence boiling point increases

Looking at the molecule images above, could the molecules of air get into the blood from the lungs? Why or why not? (Select ALL that apply)
a. Group of answer choices

b. The gas maolecules are really small, even smaller than glucose

c. Because the air molecules are so small, they can pass through the lung membrane into the blood like glucose did with the small intestine.

d. The air molecules can not pass through the membrane of the lungs because they are too large.

e. The air molecules are much larger than glucose molecules.

Answers

Answer:

b and d

Explanation:

Which layer of Earth is responsible for the movement of tectonic plates?

Answers

Convection currents in the mantle are what causes the movement of tectonic plates. As the extremely hot molten material from the mantle rises toward the crust, it cools enough to become denser and sink back into the hotter area of the mantle.

By titration, it is found that 68.1 mL of 0.143 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.

Answers

Answer:

Easy question to answer, you have the concentration and volume of the base and you have the volume of the acid. You need to find the concentration of the acid. C1V1 = C2V2 equation can be used here

Explanation:

Volume of NaOH = 0.0681 L (change mL into L)

Concentration or Molarity of NaOH = 0.143 mol/L

Volume of HCl = 0.025 L (change mL into L)

Concentration or Molarity of HCl = ???

C1V1 = C2V2

Rearrange equation to find C2

(C1 * V1) / V2 = C2

(0.143 * 0.0681) / (0.025)

C2 = 0.389532

Concentration or Molarity of HCl = 0.389 mol/L

What would a possible length for the missing
side length?
16
8

Answers

Answer:

24

Explanation:

the total of any 2 sides must be larger than the 3rd side. x is the 3rd side.

8 + x > 16

x > 8

16 + x > 8

x > -8

8 + 16 > x

24>x

x < 24

the second inequality tells us nothing as sides must be positive.

the third side must be between 8 and 24

I will mark you as brainliest if you're correct

Answers

Its true i think please no hate ‍

The nuclei of Three naturally occurring magnesium isotopes have the same number of protons but different numbers of neutrons . Explain Why ? Why does every atom of barium have 56 protons and 56 lectrons? Which subatomic particles in an atom determine its mass number ?

Answers

Based on atomic properties and structure:

Isotopes have the same proton number(atomic number) but different neutron numbers. An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.The mass number of an atom is determined by the sum of protons and neutrons.

What are isotopes?

Isotopes are atoms of an element having the same atomic number but different mass numbers.

The difference in mass number is dues to different neutron numbers.

However, because they have the same proton number, they are atoms of the same element.

Neutral atoms contains equal number of protons and electrons.

An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.

The mass number of an atom is determined by the sum of protons and neutrons.

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A reaction of the form

aA - Products

gives a plot of 1/[A] vs time (in seconds) which is a straight line with a slope of 4.15 x 103. Assuming [A]o = 0.100 M, calculate the time in seconds) required
for the reaction to reach 38.3 percent completion.

Answers

The time taken for the second order reaction is 1494 seconds.

What is a second order reaction?

A second order reaction is one in which  a plot of the inverse of the concentration of a reactant versus time is a straight line  and gives the slope of k which is the rate constant.

The formula for a second order reaction is;

1/[A] = kt + 1/[A]o

[A]o = 0.100 M

[A] = 0.100 M - (0.383 × 0.100 M) = 0.0617 M

k = 4.15 x 10^-3

t = ?

t = (0.0617 M)^-1 - ( 0.100 M)^-1/4.15 x 10^-3

t = 16.2 - 10/4.15 x 10^-3

t = 1494 seconds

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2Ca (PO.)2 + 6SiO2 + 10C - 6Casio, + PA+10CO
Starting with 700.0 grams of calcium phosphate and assuming excess silicon dioxide and carbon,
how many moles of phosphorus will be produced?

Answers

Taking into account the reaction stoichiometry, 0.1129 moles of P₄ is required to react with with 700.0 grams of calcium phosphate.

Reaction stoichiometry

In first place, the balanced reaction is:

2 Ca₃(PO₄)₂ + 6 SiO₂ + 10 C → 6 CaSiO₃ + 10 CO + P₄

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

Ca₃(PO₄)₂: 2 moles SiO₂: 6 moles C: 10 moles CaSiO₃: 6 moles CO: 10 molesP₄: 1 mole

The molar mass of the compounds is:

Ca₃(PO₄)₂: 310 g/moleSiO₂: 60 g/mole C: 12 g/moleCaSiO₃: 116 g/moleCO: 28 g/moleP₄: 124 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Ca₃(PO₄)₂: 2 moles ×310 g/mole= 620 gramsSiO₂: 6 moles ×60 g/mole= 360 grams C: 10 moles ×12 g/mole=  120 gramsCaSiO₃: 6 moles ×116 g/mole= 696 gramsCO: 10 moles ×28 g/mole= 280 gramsP₄: 1 mole ×124 g/mole= 124 grams

Moles of phosphorus P₄ produced

The following rule of three can be applied: If by reaction stoichiometry 620 grams of Ca₃(PO₄)₂ produces 1 mole of P₄, 70 grams of Ca₃(PO₄)₂ produces how many moles of P₄?

[tex]moles of P_{4} =\frac{70 grams of Ca_{3}(PO_{4} )_{2}x1 mole of P_{4} }{620 grams of Ca_{3}(PO_{4} )_{2}}[/tex]

moles of P₄= 0.1129 moles

Finally, 0.1129 moles of P₄ is required to react with with 700.0 grams of calcium phosphate.

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Copper can have improved wear resistance if alloyed with ceramic alumina, Al2O3. If a copper alloy has 7.7 wt % Al2O3, what is its composition in mol %?

Answers

The composition in mol% of the elements are :

4.91%  of Al₂O₃ in alloy  95.08% of Cu in alloy

Given data :

Weight percentage of copper alloy = 7.7 wt %

Assume weight of alloy = 100 grams

Applying the weight percentage

mass of Al₂O₃ in alloy = 7.7 gm

Mass of Cu in alloy = 100 - 7.7 = 92.3 gm

First step : calculate the mole of elements

i) moles of Al₂O₃ in alloy

 = mass of Al₂O₃  in alloy /  Atomic mass of Al₂O₃

 = 7.7 gm  / 102 gm/mol

 = 0.075 mol

ii) moles of Cu in alloy

 = mass of Cu in alloy / Atomic mass of Cu

 = 92.3 gm / 63.5 gm/mol

 = 1.45 mol

Therefore the total number of moles in the alloy = 0.075 + 1.45 = 1.525

Next step : Determine the mole percentages

i) Mole percentage of Al₂O₃ in alloy  

= ( 0.075 ) / 1.525  * 100

= 4.91%

ii) Mole percentage of Cu in alloy

= ( 1.45 ) / 1.525 * 100

= 95.08%

Hence we can conclude that The composition in mol% of the elements are : 4.91%  of Al₂O₃ in alloy and  95.08% of Cu in alloy.

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why is water called a liquid ?

Answers

Answer: A liquid takes the shape of its container. Such as a cup with water. It has no definite shape. It has a definite volume.

When sodium hydroxide is dissolved in water within a beaker, you observe that the beaker becomes warm. This situation illustrates:

Answers

When sodium hydroxide is dissolved in water within a beaker, it is observed that the beaker becomes warm due to chemical reaction.

WHAT IS A CHEMICAL REACTION:

A chemical reaction is a type of reaction that involves the rearrangement of atoms to form new substances.

The indications that a chemical reaction has occurred is:

Color Change.Production of an odor.Change of Temperature.Evolution of a gas (formation of bubbles)Precipitate (formation of a solid)

Therefore, When sodium hydroxide is dissolved in water within a beaker, it is observed that the beaker becomes warm due to chemical reaction.

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Analyze the role coefficients in a chemical reaction play in stoichiometry

Answers

Answer:

This is known as the coefficient factor

Explanation:The balanced equation makes it possible to convert information about one reactant or product to quantitative data about another element.

If you are given the mass of a reactant in grams and want to calculate the mass of a product in grams, what are the three steps of the calculation you must perform?

Answers

The major 3 steps in determining the mass of a product from a given mass of a reactant would be to find the balanced equation of the reaction, determine the mole ratio of the reactant to the product, and then use the equivalent mole of the product from the reactant to find the desired variable.

Finding the mass of products

With a given mass of a reactant, the mass of a product from a reaction can be determined in 3 major steps:

Get the balanced equation of the reaction and determine the mole ratio of the reactant to the product.Find the number of mole of the reactant from the given massFind the equivalent number of mole of the product using the mole ratio

From there, the equivalent number of moles of the product can be used to find the mass of the product by multiplying with the molar mass of the product.

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The dimensions of a box are measured to be 18.4 inches by 17.92 inches by 26 inches. The volume of the box can be found by multiplying these three dimensions. What is the volume of the box expressed to the correct number of significant figures?

A.
8,600 in3
B.
8,573 in3
C.
8,572.9 in3
D.
8,570 in3

Answers

Answer:

Explanation:The volume of the box is 8.6 × 10³ in².

V = lwh = 26 in × 18.4 in × 17.92 in = 8.6 × 10³ in²

Note: The answer can have only two significant figures because that is all you gave for the length of the box.

bezglasnaaz and 23 more users found this answer helpful

How force and motion alone with energy works?

Answers

E nergy is the ability to do work and work changes the energy of objects. Work requires the application of force over a distance to achieve that change in energy.
A book on the floor has zero potential energy. When I pick it up and put it on the table, I do work on the book because I gave it more potential energy. Work = change in energy. That is why both work and energy are measured in Joules. To do the work I applied a force (equal to the weight of the book) to the book from the floor to the tabletop. Work equals the force times the distance, in units of Newtons times Meters. Therefore 1 Newton-Meter (NM) equals 1 Joule
When objects collide it then can contact forces to transfer energy so as to change the objects motions. When two objects interact, each one exerts a force on the other, and these forces can transfer energy between them.
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