Which property of water makes it a good choice for use in heat exchangers? Choose the correct answer.



A)high entropy


B)low entropy


C)low specific heat


D)high specific heat

Answer:  B. 29.76°C

Explanation:

The melting point is known as an intensive property of matter. This means the melting point is not affected by the amount of mass. Whether the metal is really large or small, the melting point of gallium (Ga) is roughly 29.76 degrees Celsius.

Answer:

the answer is is C 465 grams

Answer:

1.)Elements

2.)Compound

3.)Subscript

4.)Formulas

Explanation:

Answer:

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Explanation:

Answer: Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.

Explanation: Hope this helps :)

Answer:  a. 0.8 tons p. month.

Explanation:

Given: Total nuclear waste = 60,000 metric tons

Time take = 60 years = 12 x 60 months   [ 1 year = 12 months]

=  720 months

Total nuclear power plants = 104

Now , Average  waste produced by each plant = [tex]\dfrac{\text{Total waste}}{\text{Time x Number of plants}}[/tex]

[tex]=\dfrac{60000}{720\times104}\approx0.8\text{ tons per month.}[/tex]

Hence, 0.8 tons p. month is produced by each plant.

So, option a. is correct.

Answer:

A on edge 2021

Explanation:

Answer:

Its 1500 meters, which is equal to 0.9320568 miles. Hope this helps!

Explanation:

Answer:

single displacement reaction

Explanation:

it is because an atom(Pb) dispalces another atom(H) in H3PI4

The given chemical reaction is single displacement reaction.

When one element in a molecule gets replaced by another, is therefore called a single displacement reaction.

The given reaction is Pb + 2 H3PO4 → 3 H2 + Pb3(PO4)2

It can be seen that when lead is treated with H3PO4 then it will give Pb3(PO4)2 and hydrogen reaction. It is a kind of single displacement reaction.

Therefore, the given reaction is single displacement reaction.

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Answer:

O my OMG

Explanation:

Remember Nicki vs. Cardi

Tungsten is an element. It is located in the d -block of periodic table. Thus it is a transition metal. Hence, option B is correct.

Tungsten is 74th element in periodic table. It is a transition metal thus, located in the d-block of periodic table. Tungsten has the chemical symbol W. Tungsten was first identified as an element in 1781.

The maximum melting temperature of any known element other than carbon, 3,422 °C, is reached by the unbound element, making its resistance all the more remarkable (which sublimes at atmospheric pressure). Tungsten has a boiling point of around 5930°C.

A few of the many alloys that contain tungsten and have many applications include radiation shielding, X-ray tubes, electrodes in gas tungsten arc welding, superalloys, and incandescent light bulb filaments.

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Answer:

D.R2NH

Explanation:

The general formula of a secondary amine is given as:

                    R2NH

Amines are organic compounds that show an appreciable basicity. They are regarded as the derivatives of ammonia where one or two of the three hydrogen atoms has/have been replaced by the alkyl or aryl groups.

 In a secondary amine, two hydrogen atoms of ammonia have been replaced by alkyl and or aryl groups.

Answer:

d. R2NH

Explanation:

edge 2021

Answer:

Helium

Explanation:

Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus.

Answer:

Explanation:

Na     +     Cl    =      NaCl

23 g        35.5 g  

23 g sodium reacts with 35.5 g of chlorine

29 g of sodium reacts with 35.5 x 29 / 23 g of chlorine

= 44.76 g

So 44.76 g of chlorine reacts and 49 - 44.76 = 4.24 g of chlorine is left over .

All the sodium is used up in the reaction .

Answer:

True

Explanation:

A physical property is a property that can be measured without changing the chemical composition of the substance.

The chemical composition of iron does not change when it conducts electricity so conductivity is a physical property.

Hope that helps.

Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, the given statement is true.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.

A physical property is a property that can be measured without changing the chemical composition of the substance. So,  ability of iron to conduct electricity is a physical property of iron

Therefore, the given statement is true.

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Answer:i think it is c, it explodes in water because that’s a chemical reaction

Explanation:

Answer: Hey! You need 48 Strawberries to make 12 smoothies.

Explanation: I knew this before but needed to make sure if it's true. So I tested it by myself and got it!

You are very welcome!

You need 84 strawberries to make 12 smoothies.

Multiplication is a mathematical arithmetic operation. It is also a process of adding the same types of expression for some number of times.

Example - 2 × 3 means 2 is added three times, or 3 is added 2 times.

Given:

Martha needs 28 strawberries to make 4 smoothies.

To make one smoothie,

Martha needs = 28/4 = 7 strawberries.

To make 12 smoothies,

Martha needs = 12 x 7

= 84 strawberries.

Therefore, you need 84 strawberries.

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The complete question:

Martha needs 28 strawberries to make 4 smoothies.

How many strawberries would Martha need to make 12 smoothies?

Answer:

The molar mass and molecular weight of Sn(CO3)2 is 238.728.

Explanation:

Molar mass of any molecule can be calculated by adding mass of all individual atoms  that comprises the compound. The Molar mass of [tex]Sn(CO_{3})_{2}[/tex] is 238.72g/mol.

Molar mass is defined as mass of one mole of a molecule or compound. It's SI unit is g/mole. The other term that is used for molar mass is molecular weight, formula unit mass. Molar mass is extensive property as it depends on the mass of individual atoms that constitutes the molecule.

Mass of tin= 118.71 g.mol

Mass of Carbon=12g/mol

mass of Oxygen= 16g/mole

Molar mass of [tex]Sn(CO_{3})_{2}[/tex] = 1×mass of tin+2×mass of carbon+6×mass of oxygen

substituting all the values we get

Molar mass of [tex]Sn(CO_{3})_{2}[/tex] = 1×118.71+2×12g/mol+6× 16g/mole

Molar mass of [tex]Sn(CO_{3})_{2}[/tex] =118.71 +24+66

Molar mass of [tex]Sn(CO_{3})_{2}[/tex]=238.72g/mol

Therefore the Molar mass of [tex]Sn(CO_{3})_{2}[/tex] is 238.72g/mol

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Answer:

Answer: two unpaired

Explanation: In general, electrons are removed from the valence-shell s-orbitals before they are removed from valence d-orbitals when transition metals are ionized. And thus, V3+ is paramagnetic, because it has two unpaired 3d-electrons.

Answer:

82.35%.

Explanation:

Mass of 1 molecule of ammonia

NH₃ = 14+3(1)

= 17

Calculating percentage by mass of N.

[tex]\%=\dfrac{\text{Mass of Nitrogen atom}}{\text{Mass of ammonia molecule}}\times 100[/tex]

[tex]\%=\dfrac{14}{17}\times 100\\\\=82.35\%[/tex]

So, the required percentage is 82.35%.

Answer:

Its Vog

Explanation:

Answer:

2Na2O2 + 2H2O → 4NaOH + O2 is the balanced ver of Na2O2 + H2O - NaOH + O2

Explanation:

Answer:

It contains chemical potential energy.

Explanation:

Answer: the water molecules become more organized and heat is released into the atmosphere as a result.

Explanation: