You are working with a concentrated solution of ammonium hydroxide. Which
piece of safety equipment is most important to have on hand?

Answers

Answer 1

Rubber gloves and other chemical resistant protective clothing are necessary when handling concentrated ammonium hydroxide.

Why it is necessary to handle concentrated solution of ammonium hydroxide with care ?

Ammonia is an irritant and corrosive to the skin, eyes, respiratory tract and mucous membranes.

May cause severe chemical burns to the eyes, lungs and skin.

Skin and respiratory related diseases could be aggravated by exposure.

The extent of injury produced by exposure to ammonia depends on the duration of the exposure, the concentration of the liquid or vapor and the depth of inhalation.

Hence, Rubber gloves and other chemical resistant protective clothing are necessary when handling concentrated ammonium hydroxide.

Learn more about Ammonium Hydroxide here ;

https://brainly.com/question/3383763

#SPJ1


Related Questions

The concentration of lead nitrate Pb(NO3)2
in a 0.726 M solution is __________ molal. The
density of the solution is 1.202 g/mL.

Answers

Answer: The concentration of lead nitrate Pb(NO3)2 in a 0.726 M solution is 0.755 molal.

Explanation:

Given:

The molar mass of Pb(NO3)2 is 331.2 g/mol

Assuming 1 litre of solution.  This would equal 1202 g of solution

In the one litre of solution, you have 0.726 mol Pb(NO3)2

0.726 mol (331.2 g/mol) = 240.5 g Pb(NO3)2

Mass of water in 1 L of solution = 1202 g - 240.5 g = 961.5 g = 0.9615 kg

Molality = mols of solute / kg of solvent

= 0.726 mol / 0.9615 kg

= 0.755 m Pb(NO3)2

Given the following list of densities, which materials would float in a molten vat of lead provided that they do not themselves melt? Densities: g/mL: lead= 11.4; glass= 2.6, gold= 19.3, charcoal= 0.57, platinum = 21.4. Enter your answer as a word only. If two or more items would float include the word and between those two items.

Answers

The materials that would float in a molten vat of lead are glass and charcoal.

Which material floats on the solution?

Glass and charcoal are the materials that would float in a molten vat of lead because they are less denser than the lead solution while on the other hand, platinum and gold get drowned into the solution because of its high density as compared to lead.

So we can conclude that the materials that would float in a molten vat of lead are glass and charcoal.

Learn more about density here: https://brainly.com/question/14997726

#SPJ1

how many neutrones does the isotope n-14 have

Answers

Answer: 7

Explanation:

Proton/atomic number + Neutron = atomic mass

atomic mass - protons/atomic number = neutrons

14 - 7 = 7

Given the following equation, how many grams of PbCO3 will dissolve when 2.50 L of 1.50 M H+ is added to 3.00 g of PbCO3?

Given
PbCO3(s) + 2H+(aq) = Pb^2(aq)+ +H2O (l)+ CO2(g)

Answers

Yes I did this and I would say yes, I got a 100%

The absolute molar entropies of O2 and N2 are 205 J K-1 mol -1 and 192 J K-1 mol-1, respectively, at 25°C. What is the entropy of a mixture of 2.4 moles of 02 and 9.2 moles of N2 at the same temperature and pressure?

Answers

The entropy of a mixture is 96.44J K-1 mol -1

The absolute molar entropies of O2= 205 J K-1 mol -1 The absolute molar entropies of N2=192 J K-1 mol -1 Moles of O2 present(m)=2.4Moles of N2 present(n)=9.2

The formula for calculating the entropy of a mixture-

Δ[tex]S_{mix} =[/tex][tex]-nR(X_{O2} ln_{XO2} +X_{N2} lnX_{N2})[/tex]

X=mole fraction

total no. of moles(t)=m + n

                             =2.4+9.2

                             =11.6 moles

now substituting the values-

entropy of mix=-11.6R(2.4/11.6 + 9.2/11.6)

                       =11.6R

( R=8.314 )        =11.6×8.314

                          =96.44J K-1 mol -1

hence, The entropy of a mixture is 96.44J K-1 mol -1

learn more about entropy here:

https://brainly.com/question/2748166

#SPJ10

Convert the scientific notation to a decimal number.

Answers

To convert Scientific Notation to a decimal number, Prescribed steps are to be taken given below.

What is Scientific Notation ?

Scientific notation is a way of writing very large or very small numbers.

A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.

Steps to Calculate Scientific Notation ;

Determine the exponent, n , on the factor 10 .Move the decimal n places, adding zeros if needed. If the exponent is positive, move the decimal point n places to the right. If the exponent is negative, move the decimal point |n places to the left.Check.

Learn more about Scientific Notation here ;

https://brainly.com/question/2005529

#SPJ1

What mass of carbon monoxide is required to react completely with 318g of iron(III) oxide?

Answers

The balanced equation for this reaction is [tex]3\text{CO}+\text{Fe}_{2}\text{O}_{3} \longrightarrow 2\text{Fe}+3\text{CO}_{2}[/tex].

This means that for every mole of iron(III) oxide consumed, 3 moles of carbon monoxide are consumed.

Iron has an atomic mass of 55.845 g/mol.Oxygen has an atomic mass of 15.999 g/mol.

This means that iron(III) oxide has a formula mass of 2(55.845)+3(15.999)=g/mol, and thus 318 g is equal to [tex]\frac{318}{159.687}=1.9913956677751 \text{ mol}[/tex].

So, this means we need [tex]3(1.9913956677751)=5.9741870033253 \text{ mol}[/tex] of CO.

Carbon has an atomic mass of 12.011 g/mol.Oxygen has an atomic mass of 15.999 g/mol.

This means CO has a formula mass of 12.011+15.999=28.01 g/mol, and thus 5.9741870033253 moles have a mass of (28.01)(5.9741870033253), which is equal to about 167 g (to 3 sf)

reaction of cysteine and NaOH

Answers

Answer:

cysteine is HOOC-CH--CH₂-SH

reaction with Naoh

HOOC-CH--CH₂-SH + Naoh ---->oh-oNH2-oh + H2o

When the human body is exposed to extreme cold, hypothermia can result and the body’s temperature can drop to 28.68°C. Convert this temperature to K.

Answers

Answer:

299.83°K

Explanation:

So, kelvin is a means of measuring temperature, as the question implies. To convert Celsius, one form of measuring temperature, to Kelvin, another form of measuring temperature, we must know the conversion median. Our median is that 0°C = 273.15°K. So, now, as we know that 0°C = 273.15°K, 26.68°C = 273.15°K + 26.68°. Because 273.15K might as well be zero degrees celsius (according to our median 0°C = 273.15°K), we simply add 26.68° to 273.15K and get 299.83°K

HELP! ASAP!
1. Using the model below, identify the products, reactants, and limiting reactant in the chemical reaction. Please provide an explanation of your reasoning. In addition, write the balanced chemical equation for the reaction that is taking place in the chamber.

Answers

Given the model from the question,

The products are: N₂, H₂O and H₂The reactants are: H₂ and NOThe limiting reactant is H₂The balanced equation is: 3H₂ + 2NO —> N₂ + 2H₂O + H₂

Balanced equation

From the model given, we obtained the ffolowing

Red => Oxygen Blue => Nitrogen White => Hydrogen

Thus, we can write the balanced equation as follow:

3H₂ + 2NO —> N₂ + 2H₂O + H₂

From the balanced equation above,

Reactants: H₂ and NOProduct: N₂, H₂O and H₂

How to determine the limiting reactant

3H₂ + 2NO —> N₂ + 2H₂O + H₂

From the balanced equation above,

3 moles of H₂ reacted with 2 moles of NO.

Therefore,

5 moles of H₂ will react with = (5 × 2) / 3 = 3.33 moles of NO

From the calculation made above, we can see that only 3.33 moles of NO out of 4 moles given are required to react completely with 5 moles of H₂.

Thus, H₂ is the limiting reactant

Learn more about stoichiometry:

https://brainly.com/question/14735801

#SPJ1

Please help


Logan has been studying rocks at school. How could he learn more about the different types of rocks that come from volcanoes?
A.
collect rocks at the shore

B.
read comics about imaginary rocks

C.
explain to his sister how volcanoes form

D.
watch videos about volcanic rocks

Answers

Answer:

I think D is the answer. The others can't be answer. Specially B and D can't be the answer.

In a container with 512.1 L water, the pH should be changed to 5 using 95% sulfuric acid. The question is how much sulfuric acid is needed.

Answers

Answer:

15

Explanation:

I got it right I just had the answer

Which TWO of the following processes will increase the concentration of al solution?
(a) Increase the amount of solute.
(b) Decrease the amount of solute.
(c) Increase the amount of solvent.
(d) Decrease the amount of solvent. ​

Answers

Answer:

B decrease the amount of solute

Its b i did the test

What is open system?
What is close system?
What is the valency of an atom?
State Heisenberg uncertainty principle
Define endothermic reaction

Answers

Answer:

1) open system is the system through which both matter and energy and enter as well as leave

ex - open beaker

2) close system is the system through which only energy can leave but matter cannot

ex - pressure cooker.. ( energy leave as air)

3) Valency of an atom is the no. of outer most electron which can participate in a reaction.

4). Heisenberg uncertainty principal states that it is impossible to measure or calculate exactly, both the position and the momentum of an object

5) The reaction in which heat is required to make products are called endothermic reaction. it cools down the surrounding .

When 50.5 g iron(III) oxide reacts with carbon monoxide, 32.2 g iron is produced. What is the percent yield of the reaction?
Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)

Answers

93.80 % is the per cent yield of the reaction [tex]Fe_2O_3(s)+3CO(g)[/tex] → [tex]2Fe(s)+3CO_2(g)[/tex].

What is a mole?

A mole is a very important unit of measurement that chemists use. A mole of something means you have 602,214,076,000,000,000,000,000 of that thing, like how having a dozen eggs means you have twelve eggs.

[tex]Fe_2O_3(s)+3CO(g)[/tex] → [tex]2Fe(s)+3CO_2(g)[/tex]

[tex]50.5 g Fe_2O_3[/tex] x ([tex]1 mol of Fe_2O_3[/tex] ÷ [tex]159.69 g Fe_2O_3[/tex]) x ([tex]2 mol\; of Fe[/tex] ÷ [tex]1 mol Fe 34.97 g Fe[/tex])

[tex]% of yield = \frac{Practical X 100}{Theoretical}[/tex][tex]Percentage \;of \;yield = \frac{Practical X 100}{Theoretical}[/tex]

[tex]Percentage\; of yield = \frac{32.8 X 100}{34.97}[/tex]

= 93.80 %

Hence, 93.80 % is the per cent yield of the reaction.

Learn more about the mole here:

https://brainly.com/question/26416088

#SPJ1

What’s the gravitational potential energy of a book 2.0 meters above the floor with a mass of 1.5 kilograms

Answers

Answer:

29.3 joules

Explanation:

P.E. = mgh

      = 1.5 kg  * 9.81 m/s^2 * 2 m   = 29.3 Joules

nts
S + 6 HNO3 → H₂SO4 + 6 NO₂ + 2 H₂O
In the above equation, how many grams of water can be made when 19.7 moles of HNO3 are
consumed?
Round your answer to the nearest tenth. If you answer is a whole number like 4, report
the answer as 4.0
Use the following molar masses. If you do not use these masses, the computer will mark
your answer incorrect.:
Molar
Mass
Element
Hydrogen 1
Nitrogen 14
Sulfur 32
Oxygen 16

Answers

Answer:

118.2 g H₂O

Explanation:

To find the mass of water, you need to (1) convert moles HNO₃ to moles H₂O (via mole-to-mole ratio from reaction coefficients) and then (2) convert moles H₂O to grams H₂O (via molar mass).

The molar mass of water can be found by combining the element's molar masses times their quantities. The ratios/conversions should be arranged in a way that allows for the cancellation of units (desired unit should be in the numerator).

Molar Mass (H₂O): 2(1 g/mol) + 16 g/mol

Molar Mass (H₂O): 18 g/mol

S + 6 HNO₃ ---> H₂SO₄ + 6 NO₂ + 2 H₂O
      ^                                                ^

19.7 moles HNO₃          2 moles H₂O                18 g
--------------------------  x  -----------------------  x  ---------------------  = 118.2 g H₂O
                                     6 moles HNO₃         1 mole H₂O

A student combined equal amounts of two solutions. One solution had a pH of 2 and the other had a pH of 12. Which would
most likely be the resulting pH?
1
3
6
11

Answers

I think 6 is right.

Answer:

the answer is 6. 2 goes into 12 6 times resulting in the answer 6

Aqueous Copper (II) nitrate reacts with aqueous potassium iodide to form Copper (II) iodide solid and potassium nitrate

Answers

Answer:

Cu(NO₃)₂ (aq) + 2 KI (aq) ---> CuI₂ (s) + 2 KNO₃

Explanation:

When writing the reaction with the symbols, you need to take into account the charges of the ions. If he charges on the ions do not balance out in a molecule, they need to be made up for in the form of subscripts. For example, copper (+2) and iodine (-1) have charges which do not balance. Thus, to make the molecule neutral, you need to have two iodine atoms (CuI₂).

The unbalanced equation:

Cu(NO₃)₂ (aq) + KI (aq) ---> CuI₂ (s) + KNO₃

Reactants: 1 copper, 2 nitrate, 1 potassium, 1 iodine

Products: 1 copper, 1 nitrate, 1 potassium, 2 iodine

The balanced equation:

1 Cu(NO₃)₂ (aq) + 2 KI (aq) ---> 1 CuI₂ (s) + 2 KNO₃

Reactants: 1 copper, 2 nitrate, 2 potassium, 2 iodine

Products: 1 copper, 2 nitrate, 2 potassium, 2 iodine

what's the name of the compound?​

Answers

this compound is hyrdoxide..because O means oxygen and H means hydrogen and when it is mixed it forms a compound..

Glucose, C₂H12O6, is a product of photosynthesis.
It has the following structure.
HICIO
HICIOH
HOIC-H
HICIOH
HICIOH
HICIOH
I
H
How many chiral centres does the molecule have?
A 1
B2
C 4
D 6

Answers

Answer:

C

Explanation:

four chiral centers

Question 4
2 pts
2 NH3 + 3 CuO g 3 Cu + N₂ + 3 H₂O
In the above equation how many moles of water can be made when 14 moles of NH3 are
consumed?

Answers

Answer:

9.33

Explanation:

balanced chemical equation:

2NH₃ + 3CuO → 3Cu + N₂ + 3H₂O

14 moles of NH3

2NH₃ → 3H₂O

14 * 2/3 = 9.33

https://brainly.com/question/20985430

quora

The heat of vaporization of water is 540 cal/g. How much heat is needed to change 4.28g of water to steam?

Answers

Answer:

2311.2 cal

Explanation:

540 cal / g    *   4.28 g = 2311.2  cal

2311.2 cal heat is needed to change 4.28g of water to steam.

What is heat?

Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.

The heat of vaporization is defined as the amount of heat needed to turn 1g of a liquid into a vapour, without a rise in the temperature of the liquid.

The heat of vaporization is equal to the thermal energy required for vaporization divided by the mass of the substance that is vaporizing. Its formula is Hv = q/m.

Putting the values in the formula:

540 cal / g  x 4.28 g = 2311.2  cal

Hence,  2311.2 cal heat is needed to change 4.28g of water to steam.

Learn more about the heat here:

https://brainly.com/question/13411214

#SPJ2

which of the following best describes what happens during nuclear fusion ​

Answers

Answer:

Nuclear fusion is a kind of nuclear reaction in which two lighter nuclei combine under suitable conditions to form heavier nuclei under suitable conditions. A lot of energy is released in this process.

Which element has properties most like Mg?

Answers

Answer:

The elements which are in the group

Predict the nature of the indicated
covalent bond.

Answers

non-polar

Explanation :

Hydrogen and carbon have similar electronegativity values, so the C—H bond is not normally considered a polar covalent bond.

Which of the following statements about carbon dioxide is not true?
Increased carbon dioxide in the atmosphere increases the Greenhouse Effect.
Carbon dioxide is a greenhouse gas.
Atmospheric carbon dioxide levels have slowly declined over the last 50 years.
Burning fossil fuels can increase carbon dioxide levels in the atmosphere.

Answers

3rd one is the correct one because I remember taking a test when i had chemistry

The standard oxidation-reduction potential of a system Fe3+ —> Fe2+ is 0.77 V. What is the ratio of the oxidized form concentration to the reduced form concentration if E = 0.711 V?

Answers

Based on the oxidation-reduction potential of the system, ratio of the concentration of the oxidized form to the concentration of the reduced form is 1 : 10.

What is standard oxidation-reduction potential of a system?

The oxidation-reduction potential of a system is a measure of the tendency for a given chemical species to be reduced.

The reduction equation is as follows:

[tex]Fe^{3+} \rightarrow Fe^{2+} = 0.77\:V[/tex]

Using the equation:

[tex]E = E^{o} - \frac{0.0592}{n}log\frac{[Fe^{2+}]}{[Fe^{3+}]}[/tex]

n = 1; E⁰ = 0.77; E = 0.711

Substituting the values and using 1/x as the ratio:

[tex]0.711 = 0.77 - \frac{0.0592}{1} * log\frac{1}{x}[/tex]

x = 1/10

Therefore, the ratio of the concentration of the oxidized form to the concentration of the reduced form is 1 : 10.

Learn more about standard oxidation-reduction potential at: https://brainly.com/question/8739272

#SPJ1

Hydrogen and iodine vapour exist in equilibrium with hydrogen iodide at a constant temperature in a gas syringe.

H2 + I2

2HI

Which of the following will increase when the pressure is increased at constant temperature? [Assume that the mixture shows ideal behavior.]

Answers

The pressure has no effect on the equilibrium constant.

What is Equilibrium ?

Equilibrium is a state when the forward reaction rate is equal to the backward reaction rate .

The equation given is

H₂ + I₂ ⇄ 2HI

The Equilibrium constant depends only upon temperature and nature of reaction ,

It is independent of  catalyst presence , initial concentration of reactants,and pressure.

The pressure has no effect on the equilibrium constant.

To know more about Equilibrium

https://brainly.com/question/13458865

#SPJ1

What would most likely happen when a metal is heated?

It will melt.
It will solidify.
Its temperature will decrease.
Its particles will move slower.

Answers

It will melt

This is because the molecules in the metal begin to move faster and faster turning from solid to liquid

Answer: it is A i took the test i got it right

Explanation: i took the test

Other Questions
The figure below is a scatterplot for paired data (x, y), with x values on the horizontal axis and y on the vertical axis. The tick marks are spaced 10 units apart on both axes. (Note that to answer the following questions you don't need the actual values for each tick mark, only differences between them.) 00 00 Oo oo 8 Oo oo (1) What are plausible values for the standard deviations of x and y, respectively? (2) What is a plausible value for the slope of the SD line? (3) Given your answer to part (b), what is a plausible value for the slope of the regression line? Directions: Preview the following passage, and answer the question that follows. Orcas: In Danger of Becoming an Endangered Species Orcas, also known as Killer Whales, are the largest members of the oceanic dolphin species. They are found in all of the worlds oceans, from the cold waters of the Arctic and Antarctic regions to warmer, tropical seas. Although Orcas are not an endangered species, some local populations are considered threatened or endangered due to pollution, depletion of prey species, conflicts with fishing activities and vessels, habitat loss, and whaling. Based on your preview of the passage above, what do you predict the rest of the text will be about? Will it be: a. An explanation of the reasons why Orcas are in danger b. A history of Orcas bred in captivity c. A description of the hunting techniques of Orcas d. all of the above Which adaptation of this excerpt best indicates a change in time period?Look at this computer tablet to highlight that you are all alone.If you read this book, it will show Hamlet that you are alone.Read this book; that will emphasize that you dont need him.To show her that you are indeed alone, read this book. However, what attitude toward and messages about the selfie, transmitted through diction and syntax choices, do the poets seek to convey that renders the selfie worthy of the honor? What are the characteristics of the image formed by the object? A nurse evaluates a client with a temporary pacemaker. The client's ecg tracing shows each p wave followed by the pacing spike. What is the nurse's best response? Find the magnitude of thisvector: A chef had long operated a restaurant in a building leased on a yearly basis from the owner. In addition to seating within the building, the restaurant had outdoor seating on a patio in the back of the building, which was permitted under the terms of the lease. Across the alley from the restaurant, a private residence was sold. The buyer, who occupied the premises, had two properly licensed dogs that he had acquired and trained for personal and home protection after being the victim of a home-invasion robbery in the same neighborhood. The buyer frequently permitted the dogs to run free within his fenced yard where the dogs, in addition to barking incessantly, would urinate and defecate within the view of the restaurant's patrons. The restaurant experienced a decrease in business attributable to the presence of the dogs. Without contacting the buyer, the chef initiated a lawsuit that alleges that the dogs constitute a private nuisance. Which of the following is the buyer's best argument against liability?A. The chef did not own the property on which the restaurant operated.B. The chef did not suffer a physical harm from the presence of the dogs.C. The chef had not tried to resolve the matter before filing the action.D. The buyer had acquired the dogs for his personal protection. Which part of an apple tree can make seeds? Select the correct answer.One tactor of the polynomial 253 - 352 - 35 + 2 is (x - 2). Which expression represents the other factor, or factors, of the polynomial?OA. (2:2 + 1)OB. (252 - 5 + 1)OC. (25 - 1 (s+1)OD. (25 + 1) (5 - 1) if you are examining a triangle with given measurements for one leg and the hypotnuse,how will you determine the measure of the unknown leg? Read the passage from sugar change the world which details do the authors include to support the claim in this passage select three options what is the area of a triangle (-4,-5),(3,-3),(3,-7)?i will give brainliest please help quick Discuss the development of agriculture for early civilizations. Include in your response implications for social organization, technology development, communication, and any other aspects of ancient culture affected by this innovation. What are the 2 concave curves in the spine How do you know when potatoes are ready to be harvested. Describe how basidiospore is produced Read this excerpt from The Song of Wandering Aengus by William Butler Yeats.Though I am old with wanderingThrough hollow lands and hilly lands,I will find out where she has gone,And kiss her lips and take her handsWhich words in the final line of the excerpt are emphasized by the rhythm of the poem?kiss, lips, take, and handsAnd, kiss, and herlips, and, and takeand, take, her, and hands If a person is chosen at random in this survey, what is the P(decaf or sugar)?HELP PLS! The small intestine has special structures, called villi, which help absorption of digested food. Which of the following is NOT a feature?B1. Good blood supplyB2. Impermeable wallsB3. Large surface areaB4. Thin layer of cells