at critical humidity the rate of corrosion is​

Answer:

0.15%

Explanation:

mass of ethylene glycol per 1000 g = 1.5 g

percentage of ethylene glycerol that is fatal = gram of ethylene/gram of the body

==> 1.5/1000 x 100% = 0.15%

Answer:

Explanation:

Density of a substance can be found by using the formula

From the question

mass = 90 g

volume = 30 mL

Substitute the values into the above formula and solve for the Density

That's

We have the final answer as

Hope this helps you

Answer:

c. mass number

Explanation:

Answer:

c mass number tell me if its right

Explanation:

Answer:

about 30 pounds

Explanation:

The mass of someone on the Moon would be 1/6 of the weight of Earth.

So, 180 ÷ 1/6 = 30.

Hope this helps you!

The answer is 30 pounds because if you weigh an amount of mass on the etah you will weigh 1/6 of it on the moon.

Answer:

corrected pressure : unknown 1 = 2.452 Atm,  unknown 2 = 1.088 atm

number of moles : unknown 1 =  0.079 moles unknown 2 =  0.035263 moles

Explanation:

Given data:

volume pressure = 0.785 liters

Unknown 1 = 1884 torr  (1884 mmhg )

Unknown 2 = 847 torr  ( 847 mmhg )

vapor pressure at 22⁰c = 19.8 mmhg

Determine the number of moles of H2 gas  for the unknowns

unknown corrected pressure for unknown 1 = total pressure - vapor pressure    = 1884 - 19.8 = 1864.2 mmhg / 760 = 2.452 Atm

no of moles = PV / RT

T = 22 + 273.15 = 295.15 k

P = 2.452 atm

R = 0.08206L.atm/mole.K

v = 0.785

number of moles = (2.452 * 0.785 ) / (0.08206 * 295.15 ) = 0.079 moles of

Unknown corrected pressure for unknown 2 = total pressure - vapor pressure  = (847 - 19.8 ) / 760 = 1.088 atm

number of moles = PV / RT

T = 22 + 273.15 = 295.15 k

R = 0.08206L.atm/mole.K

v = 0.785

P = 1.088 atm

number of moles = (1.088 * 0.785 ) / (0.08206 * 295.15 ) = 0.035263 moles

B ) determine the ratio of sample mass to number of moles

molar mass of H2 = 2.01588 g/mole

for unknown 1 = 2.01588 /  0.079 = 25.51

for unknown 2 = 2.01588 / 0.035263 = 57.167

Answer:

1. 176 × 10^12 W ; 78400000000

Explanation:

Given the following :

Fall rate = 2,400,000kg/s

Average height of fall = 50m

Gravitational Potential of falling water = mgh = mass × acceleration due to gravity × height =

How many 15 W LED light bulbs could it power?

Recall : power = workdone / time

Workdone = gravitational potential energy

Mass of water = density * volume

Density of water = 1 * 10^3kg/m^3

Rate of fow = volume / time = 2400000

Hence,

Power = 1000 * 2,400,000 * 9.8 * 50

Power = 1176000000000

Power = 1. 176 × 10^12 W

How many 15 W LED light bulbs could it power?

1176000000000 / 15 = 78400000000

= 78400000000 15 W bulbs

Answer:

Researchers gather empirical evidence through experimentation or observation. Empirical evidence is information acquired by observation or experimentation. Scientists record and analyze this data

Answer: chemist

Explanation:

Answer:

The correct answer is : 6 electrons

Explanation:

From the reduction-oxidation reaction, we identify the half-reactions:

Oxidation reaction: Cr (oxidation number= 0)  loses 3 electrons and forms the cation Cr³⁺.

Cr → Cr³⁺ + 3 e-

Reduction reaction: the cation Ni²⁺ gains 2 electrons to form Ni (oxidation number= 0).

Ni²⁺ + 2 e- → Ni

We write the two half-reactions together and we multiply the reduction reaction by 3 and the oxidation reaction by 2 to obtain the same quantity of electrons in each half-reaction: 6.

(Ni²⁺ + 2 e- → Ni) x 3

(Cr → Cr³⁺ + 3 e-) x 2

-------------------------------

3 Ni²⁺ + 2 Cr → 3 Ni + 2 Cr³⁺ (balanced reaction)

Therefore, in the balanced reaction a total of 6 electrons are transferred.

Given :

Initial mass , a = 150 gm .

Half time ,

[tex]t_{\dfrac{1}{2}}=36 \ hours[/tex].

Final mass , x = 18.75 gm .

To Find :

The time taken to decay 18.75 gm .

Solution :

We know , time taken is given by :

[tex]t=\dfrac{1}{k}\times ln(\dfrac{a}{a-x})[/tex]

Here , k is a constant given by :

[tex]k=\dfrac{0.693}{t_{\dfrac{1}{2}}}\\\\\\k=\dfrac{0.693}{36}[/tex]

Putting all given value in above equation :

We get :

[tex]t=\dfrac{36}{0.693}\times ln(\dfrac{150}{150-18.75})\\\\t=6.94\ hours[/tex]

Therefore , time taken is 6.94 hours .

Hence , this is the required solution .

Answer:  

The following parameters:  

Explanation:  

The options have been incorrectly arranged in the question statement given here. The three conditions mentioned above are what would be observed to remain the same when this experiment is carried out.  

Answer:

Explanation:

Product development includes a product's entire journey, from Identifying a market need to conceptualizing and designing the product.

Creating a new software, designing a new tool or machine, designing and bringing new smartphones or gaming consoles to the market, designing and producing a new type of shoe, all are examples of product development.

There are five phases of product development :  idea generation, screening, concept development, product development and commercialization.

Answer:

13,3875 minutes or 2,231.25 hours

Explanation:

153 x 25 = 3,825

person x lab paper = all the lab papers turned in.

35 x 3,825 = 13,3875

minutes x all the lab papers turned in = amount of minutes spent on grading

Answer:

test her suspicion by checking to see whether other cats also make her sneeze

Answer:

HCN - CN⁻ (pair #4)

Explanation:

Hello,

In this case, for the selection of best pair for the preparation of the buffer solution with a pH of 8.15 we need to look for the one having the pKa closest to the required pH, considering the Henderson-Hasselbach equation:

[tex]pH=pKa+log(\frac{[base]}{[acid]} )[/tex]

In such a way, among the options, the pair HCN - CN⁻ (#4) has a pKa of 9.39 which is the closest in comparison to the others, taking into account the we will look for a [base]/[acid] ratio approaching 1.

Best regards.

Answer:

Sample Essay On What Science Means to You. ... Entire knowledge acquired through science is about discovering truths, finding facts, uncovering phenomenon hidden by the nature. Observations and experimentation, in science, support in describing truth and realities through systematic processes and procedures.

Explanation:

Science is the pursuit and application of knowledge and understanding of the natural and social worlds according to systematic and evidence-based methodologies. Scientific methodologies include: Objective Observations: Measurements and Data (Math may be used as a tool, but not always)

Science plays an important role in our daily lives. It made our lives easier and more convenient. Science is just a systematic way of knowledge and life. The exploratory, careful and careful observation of changes in natural events by humans has produced science and scientific research.

Science plays an important role in our daily lives. It made our lives easier and more convenient. Science is nothing but a systematic way of knowledge and life. The exploratory, careful and careful observation of changes in natural events by humans has produced science and scientific research.

Learn more about Scientific here: https://brainly.com/question/17216882

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Answer:

The building block that makes up all matter in the universe is atoms.

Answer:

1.

Explanation:

Hello,

In this case, for the given reaction we first assign the oxidation state for each species:

[tex]Sn^0 + H^+N^{5+}O^{-2}_3 \rightarrow Sn^{4+}O_2 + N^{4+}O^{2-}_2 + H^+_2O^-[/tex]

Whereas the half reactions are:

[tex]Sn^0+2H_2O \rightarrow Sn^{4+}O_2 +4H^++4e^-\\\\H^++H^+N^{5+}O^{-2}_3 +1e^-\rightarrow N^{4+}O^{2-}_2+H_2O[/tex]

Next, we exchange the transferred electrons:

[tex]1\times(Sn^0+2H_2O \rightarrow Sn^{4+}O_2 +4H^++4e^-)\\\\4\times (H^++H^+N^{5+}O^{-2}_3 +1e^-\rightarrow N^{4+}O^{2-}_2+H_2O)\\\\\\Sn^0+2H_2O \rightarrow Sn^{4+}O_2 +4H^++4e^-\\\\4H^++4H^+N^{5+}O^{-2}_3 +4e^-\rightarrow 4N^{4+}O^{2-}_2+4H_2O[/tex]

Afterwards, we add them to obtain:

[tex]Sn^0+2H_2O+4H^++4H^+N^{5+}O^{-2}_3 \rightarrow Sn^{4+}O_2 +4H^++4N^{4+}O^{2-}_2+4H_2O[/tex]

By adding and subtracting common terms we obtain:

[tex]Sn^0+4H^+N^{5+}O^{-2}_3 \rightarrow Sn^{4+}O_2 +4N^{4+}O^{2-}_2+2H_2O[/tex]

Finally, by removing the oxidation states we have:

[tex]Sn + 4HNO_3 \rightarrow SnO_2 + 4NO_2 + 2H_2O[/tex]

Therefore, the smallest whole-number coefficient for Sn is 1.

Regards.

Answer:

1qt is the same as 946.35mL

Explanation:

4.80 US liquid quart is equal to 4542. 49 mL.

A quart is a unit for capacity used in the Imperial British and the U.S. Customary systems of measurement. It is used for both liquid and dry measurements, one standard quart is used in the British system. This is equal to two imperial pints, or one-fourth of the imperial gallon.

This is 69.36 cubic inches or 1,136.52 cubic cm. The U.S. system of measurements has two units for a quart. One is used for the liquid measurements and a slightly larger unit is used for the dry measurements.

The U.S. liquid quart unit is equal to two liquid pints, or one-fourth U.S. gallon. This is 57.75 cubic inches or 946.35 cubic cm. The dry quart is equal to two dry pints, or 1/32 bushel. This is 67.2 cubic inches or 1,101.22 cubic cm.

In this case, 1 US quart = 946.353 ml

So, 4.80 liquid quart = 4542.49 ml.

Therefore, 4.80 US liquid quart is equal to 4542. 49 mL.

Read more about US quart, here

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Answer:

Explanation:

Mechanical energy = Gravitational potential energy + kinetic energy

Time            Gravitational potential energy        kinetic energy         Total ME

0                                    4                                                0                        4

2                                     2                                               2                        4

4                                     0                                               4                        4

6                                     2                                               2                        4

8                                     4                                               0                        4

and so on  .....

We see that total mechanical energy is always 4 which is constant .

So gravitational and kinetic energy changes cyclically but total mechanical energy is constant .

Answer:

The element rubidium forms a cation with a charge of +1. The symbol of this ion is Rb+, and the name is rubidium ion. The number of electrons in this ion is 36 electrons

Explanation:

Rubidium belongs to the group 1A of the periodic table of elements. It is an alkali metal. The rubidium atom has an atomic number of 37. The neutral atom also has 37 electrons.

Being a metal, it forms ions by the loss of electrons. Since it is an alkali metal, it has one valence shell electron. It loses this one electron to form the rubidium ion, Rb+ which then has 36 electrons.

Answer:B: Which type of backpack do students purchase most often

Explanation:   The right answer is B. because its a question you can graph informational data about, unlike any other answer. Hope this helped!

    ~Emilie Greene

Answer:

Molar mass = 12.51 g/mol

Explanation:

V = 3L

P = 1.25 atm

T = 20 C = 20 + 273 = 293 K (Upon conversion to kelvin temperature)

n =?

m = 1.95g

Molar mass = ?

The variables are related by the follwing equation;

pV = nRT

where r = gas constant = 0.0821 L atm K−1

Solving for n, we have;

n = pV / RT

n = (1.25 * 3 ) / (0.0821 * 293)

n = 3.75 / 24.0553 = 0.1559 mol

The relationship between number of moles, n and molar mass is given as;

n = mass / molar mass

Molar mass = Mass / n = 1.95 / 0.1559

Molar mass = 12.51 g/mol

Answer:

For much of the past century, scientists studying drugs and drug use labored in the shadows of powerful myths and misconceptions about the nature of addiction. When scientists began to study addictive behavior in the 1930s, people with an addiction were thought to be morally flawed and lacking in willpower. Those views shaped society’s responses to drug use, treating it as a moral failing rather than a health problem, which led to an emphasis on punishment rather than prevention and treatment.

Today, thanks to science, our views and our responses to addiction and the broader spectrum of substance use disorders have changed dramatically. Groundbreaking discoveries about the brain have revolutionized our understanding of compulsive drug use, enabling us to respond effectively to the problem.

As a result of scientific research, we know that addiction is a medical disorder that affects the brain and changes behavior. We have identified many of the biological and environmental risk factors and are beginning to search for the genetic variations that contribute to the development and progression of the disorder. Scientists use this knowledge to develop effective prevention and treatment approaches that reduce the toll drug use takes on individuals, families, and communities.

Despite these advances, we still do not fully understand why some people develop an addiction to drugs or how drugs change the brain to foster compulsive drug use. This booklet aims to fill that knowledge gap by providing scientific information about the disorder of drug addiction, including the many harmful consequences of drug use and the basic approaches that have been developed to prevent and treat substance use disorders.

At the National Institute on Drug Abuse (NIDA), we believe that increased understanding of the basics of addiction will empower people to make informed choices in their own lives, adopt science-based policies and programs that reduce drug use and addiction in their communities, and support scientific research that improves the Nation’s well-being.

Answer:

D

Explanation:

Answer:

[tex]m=1.325gNa_2CO_3[/tex]

Explanation:

Hello,

In this case, by considering the given seminormal solution, we infer it is a 0.5-N solution which means that we can obtain the equivalent grams as shown below for the 55 cc (0.055 L) volume:

[tex]eq-g=0.5eq-g/L*0.050L=0.025eq-g[/tex]

Next, since sodium carbonate has two sodium ions with a +1 oxidation state each, we can obtain the moles:

[tex]mol=0.025eq-gNa_2CO_3*\frac{1molNa_2CO_3}{2eq-gNa_2CO_3}\\ \\mol=0.0125molNa_2CO_3[/tex]

Finally, the mass is computed by using its molar mass (106 g/mol)

[tex]m=0.0125molNa_2CO_3*\frac{106gNa_2CO_3}{1molNa_2CO_3} \\\\m=1.325gNa_2CO_3[/tex]

Regards.

Answer:

0.15 L

Explanation:

You need to first find the volume of the container.  You can do this by dividing the mass by the density.  This will give you the mass in mL.

5.00 kg = 5,000 g

(5,000 g)/(1.00 g/mL) = 5,000 mL

5,000 mL = 5 L

Now, find the volume the seawater will take up.

(5,000 g)(1.03 g/mL) = 4854.4 mL

4854.4 mL = 4.85 L

Subtract the two volumes to find the volume that left unfilled.

5 L - 4.85 L = 0.15 L

Answer:

Ammonia is a compound.

Explanation:

A compound is composed of two or more separate elements. Ammonia is NH3, which happens to be two different elements.

dont need time cause time waiting on nobody