I need help with this one.

Answer:

Low pressure and high temperature :)

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Answer:

the answer is d slightly less

Answer:

See below ↓↓↓

Explanation:

Helminths = 1 Most Difficult

Fungi = 2 Moderately Difficult [Option not given, but 2 is right answer]

Bacteria = 3 Least Difficult

Answer:

Explanation

substance X will have least volume because it has maximum density and using the relation volume inversly propotional to the density of a substance.

substance Z will have least mass beacause it has least density and using relation mass is directly proportional to the volume of a substance .

substance Z will float in water because its density is less than the water (1 gm/cm^3).

Answer:

69.271837183727718371

Answer:

A) Nuculear

Explanation:

Nuclear powerplants are danguorous for the ecosystem and incase of an exsplosion nuclear is the hardest to recover from. Especially if you know the story about Chernobyl blow up. many animals began to grow diffrent mutations and evryone had to evacuate from having desieses and mutations.

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Answer:

b. CA(OH)2 - Calcium hydroxide

Answer:

0.17637 pounds

Explanation:

hope this help

The number of units of NaOH are in 80 grams is 12.046 x 10²³ Particles of NaOH.

The mole, symbol mol, is the SI base unit of amount of substance.

The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.

Formula to calculate number of Particles when weight of the sample is given ;

N = given weight  / Molecular weight x Nₐ

   = 80 / 40 x 6.023 x 10²³ Particles

   =  12.046 x 10²³ Particles of NaOH

Hence, The number of units of NaOH are in 80 grams is 12.046 x 10²³ Particles of NaOH.

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Answer:

≈32°C

Explanation:

1) the rule:

[tex]\frac{pV}{T}=const;[/tex]

2) according to the rule above the final temperature can be calculated as:

[tex]t_{final}=\frac{p_{init}}{p_{final}}*t_{init}; \ = > \ t_{final}=\frac{100}{300}*95=32.[/tex]

According to the Gay-Lussac's law, as volume is constant the temperature must be decreased to 31.6°C.

Gay-Lussac's law is defined as a gas law which states that the pressure which is exerted by the gas directly varies with its temperature and at a constant volume.The law was proposed by Joseph Gay-Lussac in the year 1808.

The pressure of the gas at constant volume reduces constantly as it is cooled till it undergoes condensation .The law is given by the formula, V₁/T₁=V₂/T₂, which on substitution gives T₂=95×100/300=31.6 °C.The container in Gay-Lussac's law is considered to be rigid  in contrast to the container present in Charle's law.

Thus, as per  Gay-Lussac's law, as volume is constant the temperature must be decreased to 31.6°C.

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The formulas for the substances and designate their physical states as follows:

a. nitrogen dioxide gas NO₂(g)

b. liquid gallium  GA (I)

c. barium chloride dissolved in water BaCI₂ (aq)

d. solid ammonium carbonate (NH₄) 2CO₃ (s)

The term chemical formula is defined as an expression that presents the elements in a compound and the relative proportions of those elements.

If only one atom of a particular type is present, no subscript is used. For atoms that have two or more of a particular type of atom present, a subscript is written after the symbol for that atom.

It presents the constituent element and the number of atoms of each element present in one molecule of the compound. It also corresponds to the molecular mass of the compound.

Thus, The formula of nitrogen dioxide gas is NO₂(g).

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Glycerol has the stronger intermolecular attraction because it is more viscous and has a larger molar mass.

This is the ability of substances to resist flow and is common among fluids such as air and liquid.

Glycerol however has a stronger intermolecular attraction because it is more viscous and has a larger molar mass because they have a direct relationship.

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Answer:

A-glycerol because it has a larger molar mass

Explanation:

Edge 2022 :)

The temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.

The temperature change of a calorimeter can be calculated using the following expression:

E = mc∆T

Where;

400 = 10 × 4.18 × ∆T

400 = 41.8∆T

∆T = 400/41.8

∆T = 9.57°C

Therefore, the temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.

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Answer:

2H2 + O2 —-> 2H2O

The mole ratio of H2 to H2O is 2 : 2 = 1:1

4 moles of H2 = 4 moles of H2O

Moles of H20 = 4mol

Molar mass of H2O = 18g/mol

Mass = moles X Molar mass

= 4mol x 18g/mol

= 72g

Mass of H2O is 72g

Answer:

NaOH + HCI

Explanation:

yesssssssssssss

Answer:

temperatures

enzyme activity

The molarity of a solution that has 26 moles of NaCl in 2.7L of water is 9.63M.

The molarity of a solution can be calculated by dividing the number of moles of the solute by the volume of the solution as follows:

Molarity = no of moles ÷ volume

According to this question, a solution has 26 moles of NaCl in 2. 7 l of water. The molarity is as follows:

Molarity = 26mol ÷ 2.7L

Molarity = 9.6M.

Therefore, the molarity of a solution that has 26 moles of NaCl in 2.7L of water is 9.63M.

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Answer:

+4

Explanation:

In PbO

2

​

, oxygen exhibits an oxidation number of −2 (since it's not a peroxide or superoxide).

Let the oxidation number of Pb be x. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.

⇒x+(−2)+(−2)=0

     x=+4

So the oxidation no. of Pb is +4.

The lead (Pb) oxidation number in [tex]\rm PbO_2[/tex] is +4, whereas the oxygen (O) oxidation number is -2.

The idea of oxidation number, also known as oxidation state, is used in chemistry to describe the potential charge that an atom would have if electrons were completely transported in a chemical bond or reaction. It is a valuable instrument for tracking electron distribution in a chemical or ion and understanding redox (oxidation-reduction) reactions. Understanding redox processes, which involve the transfer of electrons between reactants, requires an understanding of oxidation numbers.

Oxidation number of Pb is given as:

(+x) + 2(-2) = 0

x - 4 = 0

x = +4

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Answer:

c

Explanation:

neutrons have no charge

protons and electrons have opposite charges and balance each other out in equal numbers

Answer:

The pH scale measures whether there is more hydronium or hydroxide in a solution. In other words, it tells us how basic or acidic the solution is. A lower pH means something is more acidic, also known as a stronger acid. A higher pH means it is more alkaline or a stronger base.

Answer:

Carbon Dioxide is not affected by sunlight. But the radiation changes direction when it hits a carbon dioxide molecule

Explanation:

Answer:

By definition, and this is what Avogadro's constant tells you, 1 mole of nickel must contain 6.022⋅1023 atoms of nickel.

Explanation:

I hope this helps, you can ask any questions for clarification

Answer:

an acidic oxide reacts with bases and the seconf

Answer:

A decompositon reaction is a reaction that takes place when one reactant breaks down into two or more simpler substances. The decomposition reaction can be represented by the general equation: AB → A + B. Most of the decomposition reactions require an input of energy in the form of heat, light or electricity

Explanation:

Ironing clothes is Conduction.

Conduction is one of the means of Heat transfer ,others includes

Conduction is the transfer of heat energy from one object to another object from particles in a hotter object to particles in a cooler object, For Example: Ironing clothes is conduction.

This is because The heat from the iron which transfers to the clothes is conduction.

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Answer:

pretty sure it is

2

1

2

3

1

2

Explanation:

Hii there !

The reaction accompanying production of water in this case would be -

[tex]\green{ \underline { \boxed{ \sf{H_2+ \frac{1}{2}O_2\longrightarrow H_2O}}}}[/tex]

Thus ,by observing the reaction, we can conclude that 1 mole of Hydrogen (H[tex]_2[/tex])react with 1/2 mole of oxygen(O[tex]_2[/tex])to produce 1 mole of water (H[tex]_2[/tex]O)

[tex]\implies[/tex]Therefore, 37.0 moles of hydrogen(H[tex]_2[/tex]) will be required to produce 37.0 moles of water.

Hope it helps.