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Answer:

mass of ONE mole U = 238g

therefore mass of 2.4 U= 238×2.4

=571.2 g ANS.

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Answer:

18s DOUBLE BONDS with 8O

Answer:

1 MOL of NO2 = 43

3 mol of NO2 = 43×3

= 129

Answer:

305.7

Explanation:

No of MOL*MOLAR MASS

One mole of O2 weighs 16×2 =32grams

So,...

2 mole of O2 weighs =32×2 grams

2MOLE of O2 =64 grams....

Ans..

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HEY MATE YOUR ANSWER IS HERE

★ MAN MADE ELEMENTS ★

• 93 Np Neptunium
• 94 Pu Plutonium
• 95 Am Americium
• 96 Cm Curium
• 97 Bk Berkelium
• 98 Cf Californium
• 99 ES Einsteinium
• 100 Fm Fermium
• 101 Md Mendelevium
• 102 No NOBELIUM
• 103 Lr Lawrencium
• 104 Rf Rutherfordium
• 105 Db DUBNIUM
• 106 Sg Seaborgium
• 107 Bh Bohrium
• 108 Hs Hassium
• 109 Mt Meitnerium
• 110 Ds DARMSTADTIUM
• 111 Rg Roentgenium
• 112 Cn Copernicium
• 113 Nh Nihonium
• 114 Fl Flerovium
• 115 Mc Moscoviu
• 116 Lv Livermorium
• 117 Ts Tennessine
• 118 Og Oganesson

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Answer:

1-Industrial CHEMISTRY

2- PHOTOCHEMISTRY

1. CHECK the initial TEMPERATURE of the reaction
2. Check the final temperature after the reaction
3. If TEMP is same or more than it is a EXOTHERMIC reaction
4. If it is low than it is a ENDOTHERMIC reaction

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Answer:

here is your answer mate

Explanation:

Copolymers are polymer material containing at least two types of monomers. On the other hand, condensation polymers are polymer MATERIALS that form via condensation REACTIONS while removing a SMALL molecule as a BYPRODUCT.

Answer:

These polymers can form from a SINGLE kind of monomer, or, copolymers can form if two or more DIFFERENT monomers are involved. Most of the natural polymers are FORMED by condensation. One of the simplest of the condensation polymers is a type of NYLON CALLED nylon 6.

EXPLANATION:

TWO CHARACTERISTICS of CHEMICAL REACTION

Answer:

Explanation:

But alcohol doesn't work for all germs, such as norovirus; Clostridium difficile, which can cause life-threatening diarrhea; or Cryptosporidium, a parasite that causes a diarrheal disease called cryptosporidiosis, the Centers for Disease Control and Prevention says. Hand sanitizers also don't remove harmful chemicals like pesticides or heavy metals, nor does hand sanitizer work well on especially dirty or greasy hands. So, soap and water still win the contest OVERALL.

There are a few small-scale studies demonstrating that an alcohol-free hand sanitizer containing benzalkonium chloride as the active INGREDIENT, at a concentration of 0.13%, is just as effective and even more effective than alcohol at getting rid of bacteria. The alcohol-free hand sanitizer that was tested was called HandClens, and the scientists who conducted the research on it worked for the now-closed laboratory that developed the product. That doesn't mean benzalkonium chloride isn't effective, but there doesn't seem to be independent research to suggest that it's better than alcohol. Plus, benzalkonium chloride might be harmful for some individuals, especially at higher concentrations, according to the Hazardous Substances Database.

According to the CDC, hand sanitizer without alcohol may not kill as many germs and may only reduce the growth of germs rather than killing them outright. The CDC recommends hand sanitizers with at least 60% alcohol in them for maximum effectiveness.

Does hand sanitizers expire?

Hand sanitizer doesn't really expire. There will likely be an expiration date on the bottle because hand sanitizers are regulated by the FDA, which requires certain things to be on the packaging, including an expiration date. The expiration date is supposed to be the last date at which the product contains the ingredients in the amount specified on the label. Whether the manufacturer has tested how long the product meets the label claim or they just came up with an arbitrary date to determine the expiration date is mostly unknown to consumers. (Manufacturers are supposed to conduct testing, but not all do.)  

Alcohol is a shelf-stable chemical according to its safety data sheet from chemical-supplier Sigma Aldrich. This means that if alcohol is kept in a sealed container at room temperature it will remain at the same concentration for a very, very long time.

However, alcohol evaporates easily because of its relatively low boiling point, and over time, as the bottle is opened and closed, some alcohol may escape and the concentration of alcohol in your hand sanitizer might start to decrease. Still, if you keep the bottle closed and at room temperature, you're likely to have an effective product for as long you need it.

Is hand sanitizer bad for you or toxic?

Alcohols are considered safe for use as an antiseptic and generally have no toxic effect on the skin, although REPEATED use may cause DRYNESS or mild irritation, according to the Hazardous Substances Database. Several studies have shown that repeated use of hand sanitizer is less irritating than repeated hand washing with soap. But damaged skin is more susceptible to irritation from alcohol.

And let's be honest, would you rather have some mild skin irritation, or distribute and contract an ILLNESS?

ANSWER:

n=0.002mol

Explanation:

because C=n/V => n=CxV = 0.020L X 0.1 MOL/L = 0.002 mol

WELL, you need to know the ATOMIC weight of Platinum (PT) and the number of atoms per mole. The answer to the former is 195.084 g/mole and the latter is 6.023 * 10^23 atoms/mole. Then, multiply everything as shown below:

Number of atoms = (1 g) * (1/195.084 g/mole) * 6.023 * 10^23 atoms/mole

Number of atoms = 3.087 * 10^21 atoms

Note, I’ve included units on everything and you can SEE that they all cancel except for atoms. Dragging the units along can be a pain but it is a great way to check that they way the NUMBERS are being combined is correct.

Answer:

hope this answer is helpful

thank u

Explanation:

according to atomic structure the FACTORS which determine the element position in periodic table are 1. no of protons IE atomic number=less atomic number the element is PLACED first 2,.atomic size::size of element in creases down the group    3. atomic weight:in MENDELEEVES periodic table elements are placed according to their increasing atomic weights

ANSWER:

ATOMIC ABSORPTION SPECTROMETRY

ANSWER:YES ZINC REACTS with water.

Explanation:

ANSWER:

P4+O2+Cl2=PCl5

Explanation:

FLAM ISAAC m ka

Ovc F

Answer:

10 mol

Explanation:

GIVEN :

We have given MASS = 980 g

We are asked to find total number of moles :

We have molar mass of H₂SO₄ = ( 2 + 32 + 64 ) = 98 g / mol

We know :

No. of moles = Given mass / Molar mass

Putting values here we GET :

No. of moles = 980 / 98 mol

= > No. of moles = 10 mol

Hence we get required answer.

Read more :

Calculate the number of moles in 52g of He (atomic mass of He is 4u)

brainly.in/question/16486404

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ANSWER:

because MOLECULES of sugar gets ADJUSTED into MOLECULAR space of WATER

ANSWER:

These are ammonium chloride, NAPHTHALENE GHEE, CAMPHOR

ANSWER:

OPTION 1

A C6H10Br2

B Option 1

hey mate here is ur answer..

Beryllium and magnesium will SHOW similar chemical reactions as calcium. SINCE these elements belong to same group 2 and also have TWO electrons INTHEIR outermost shell like calcium.

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hey mate here is ur ANSWER.

In water's diagram, the slope of the line between the SOLID and LIQUID states is negative rather than positive. The reason is that water is an UNUSUAL substance in that its solid state is less dense than the liquid state. ICE floats in liquid water.

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It is the HOMOGENEOUS MIXTURE in which to or more SUBSTANCE DISSOLVE

there are 2 TYPES of solution_1solute

2-solvent

Explanation:

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ANSWER:

when it is SOMEWHAT ACIDIC

Answer:

You probably already know to AVOID yellow snow. This color is a big WARNING sign that the snow is contaminated, often with urine. Similarly, don't eat other COLORED snow. Red or green COLORS can indicate the presence of algae, which may or may not be good for you.

HOPE THIS HELPS YOU ✌️

hey MATE here is ur ANSWER...

The specific heat of a SUBSTANCE depends on its nature. Specific heat is the AMOUNT of heat energy provided to 1 kg mass of the substance to increase its temperature by 1 ℃. As it's expressed per unit mass and per unit temperature, it will not depend onmass and temperature.

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The percent YIELD is 45 %.

CaCO₃ →CaO + CO₂

First, calculate the theoretical yield of CaO.

Theor. yield =

60 g CaCO

3

×

1 MOL CaCO

3

100.0 g CaCO

3

×

1 mol CaO

1 mol CaCO

3

×

56.08 g CaO

1 mol CaO

=

33.6 g CaO

Now calculate the percent yield.

% yield =

actual yield

theoretical yield

×

100

%

=

15 g

33.6 g

×

100

%

=

45

%

Answer:

The CLEANING action of soap is due to MICELLE formation and EMULSION formation. Inside water a unique orientation forms clusters of molecules in which the hydrophobic tails are in the interior of the cluster and the ionic ends on the surface of cluster. ... The dirt suspended in MICELLES is EASILY rinsed away.

Using Ellingham DIAGRAM indicate the lowest temperature at which ZnO

can be reduced to Zinc metal by carbon. Write the OVERALL reduction reaction at thistemperature.

Ashna is a third grade SCHOOL going school.Miss Benzy is a very STRICT teacher and she teaches math to all the students. On the first day of academic year, Miss Benzy gave her a homework to find sum, difference, product, quotient and remainder of the TWO numbers given by her. Can you help Ashna by writing a program for the same.

hope it helps you

Using Ellingham diagram INDICATE the lowest temperature at which ZnO

can be reduced to Zinc metal by carbon. Write the overall reduction reaction at this temperature.

Ashna is a third grade school going school.Miss Benzy is a very strict teacher and she teaches math to all the STUDENTS. On the first day of academic year, Miss Benzy gave her a homework to find sum, difference, PRODUCT, quotient and remainder of the two numbers GIVEN by her. Can you help Ashna by writing a program for the same.

ANSWER:

NH

Explanation:

cozz,all the OTHERS are ELEMENTS

ANSWER:

ONE of the main DISADVANTAGES of carboxylic acid is that if TOUCHES the human or animal SKIN it will burn it .

Answer:

EVAPORATION is a surface phenomenon because it occurs in the surface.

Explanation:

For example when we put wet clothes for drying we spread them out so that the surface AREA GETS increased. When the surface area INCREASES the water will get enough space to get into vapour stage and THUS evaporation happens easily.

Answer:

EXPLANATION:

Wb (mass of SOLUTE)=5g

Wa(mass of solvent)=80G

ANSWER:

because it is in the gaseua FORM so not in SOLID

ANSWER:

The BRANCH of chemistry that deals with the RELATIONS between electrical and CHEMICAL phenomena.

EXPLANATION:

Fireflies have same light as the sun that's why in daytime Fireflies is INVISIBLE the NIGHT is dark that's why in night we are able to SEE the Fireflies .

Answer:

avagadro number = 6.023 × 10^ -23

it is the UNIT of substance PRESENT in an element which is EQUAL to 12carbon isotope

First we have to CALCULATE the concentration of the strong ACID HNO3:

0.34molHNO3735L=4.626×10−4M

Now HNO3 is a strong acid, and DISSOCIATES completely in WATER: HNO3 → H+ + NO3-.

[H+]pH=4.626×10−4M=−log[H+]=−log[4.626×10−4]=3.33

Despite the large dilution FACTOR (a small number of moles into 735 Liters), this is still quite an acidic solution, pH < 7.

<STRONG>ANSWER:

because there exist a strong FORCE of attraction between the particles , which is very DIFFICULT to break

Answer:

EXPLANATION:

HCN (AQ) + H2O (aq) ⇄ CN– (aq) + H3O+ (aq ); Ka = 4.9 x 10–10. 2 H2O (L) ... What percentage of a weak acid originally present ... prepare a buffer solution with pH = 4.10

lollipop- sweet

warheads- sour

lemon- tart

cakes- sweet

water- NEUTRAL

potato chips- SALTY

orange- citrus

lime- bitter

grapefruit- sour

ham- salty

Answer:

200 ml

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Answer:

. Red blood CELLS placed in a solution with a lower water concentration compared to their contents (eg 1.7 per cent SALT solution) will LOSE water by OSMOSIS and shrink. Water will diffuse from a HIGHER water concentration inside the cell to a lower water concentration outside the cell.

Answer:

Divide 212 by MOLAR MASS of MGCL2

Answer:

The AMOUNT of HEAT energy ABSORBED by the atoms or molecules of particle at unit time for breaking bond is called Lantent heat.