Which one is the right answer?

Answer:

Ketchup is not a change, it is a sauce.

Explanation:

Answer:

There is no change in the tomatos structure its "state of matter" you could say is changed, but the actual chemical compoud is the same.

Answer:

754

Explanation:

Answer:

33.085476 meV ≈ 33 meV

Explanation:

Hope this helped!

Answer:

Ethanoic Acid

Explanation:

Answer:

D) CH2

Explanation:

The empirical formula of propene is CH₂ as it has chemical formula of C₃H₆ which on division of subscripts give empirical formula as CH₂.

Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.It does not make any mention of the arrangement of atoms or the number of atoms. The empirical formula gives information about the ratio of number of atoms which are present in a compound.

Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.

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Answer:

water is a compound and nitrogen is an element

Explanation:

water is a compound and also a molecule because it is a combination of two different element, while nitrogen is an atom or an element

Answer:  Water is a compound and nitrogen is an element.

Explanation:

Water = H20 = 2 Hydrogen atoms and 1 Oxygen atom

Nitrogen (N) element of Group 15 of the periodic table

Answer:

C

Explanation:

To hello fight disease

Answer:

B. How much energy it takes to heat a substance

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

The substances with higher value of specific heat capacity require more heat to raise the temperature by one degree as compared the substances having low value of specific heat capacity. For example,

The specific heat capacity of oil is 1.57 j/g. K and for water is 4.18 j/g.K. So, water take a time to increase its temperature by one degree by absorbing more heat while oil will heat up faster by absorbing less amount of heat.

Consider that both oil and water have same mass of 5g and change in temperature is 15 K. Thus amount of heat thy absorbed to raise the temperature is,

For oil:

Q = m.c. ΔT

Q = 5 g× 1.67 j/g K × 15 K

Q = 125.25 j

For water:

Q = m.c. ΔT

Q = 5 g× 4.18 j/g K × 15 K

Q = 313.5 j

we can observe that water require more heat which is 313.5 j to increase its temperature.

Answer:

yes

Explanation:

Answer:

Explanation:

2

Answer:

chickens

Explanation:

we are more related to chickens as for we dont fly such like bats. chickens genes are closer to us. we cant be able to be upside down as long as bats can and we dont have their really good r=hearing either.

Answer:

Moon

Explanation:

Answer:

The second choice.

Explanation:

The products often have completely different properties than the reactants.

The first and third are wrong because matter is always preserved in a chemical reaction.

The last is not true.

Answer:

80 grams

Explanation:

Normality is one of the units of concentration and it is derived by dividing the gram or mole equivalent of the solute in a solution by the volume (in liters) of the solution.  

The equivalent weight of NaOH is derived by dividing the molecular weight of the compound by 1. Hence, the equivalent weight of NaOH in 1 normal solution is 40/1 = 40 g.

If 1 normal NaOH solution contains 40 g of NaOH in 1 liter of the solution, then a binormal (2 normal) solution of NaOH would contain;

   2 x 40 = 80 g of NaOH.

Answer:

A. all other bulbs will no longer work

Answer:

it would break when it hits the ground

Explanation:

NaOH is the limiting reactant

Given

12 g of sulfur reacts with 18 g of oxygen and 24 g of sodium hydroxide

Required

The limiting reactant

Solution

Reaction

2 S(s) + 3 O₂(g) + 4 NaOH(aq) ⇒ 2 Na₂SO₄(aq) + 2 H₂O(l)

[tex]\tt \dfrac{12}{32.065}=0.374[/tex]

[tex]\tt \dfrac{18}{32}=0.5625[/tex]

[tex]\tt \dfrac{24}{40}=0.6[/tex]

A method that can be used to find limiting reactants is to divide the number of moles of known substances by their respective coefficients, and the smallest ratio becomes a limiting reactant

S : O₂ : NaOH =

[tex]\tt \dfrac{0.374}{2}\div \dfrac{0.5625}{3}\div \dfrac{0.6}{4}=0.187\div 0.1875\div 0.15\Rightarrow NaOH~smallest~ratio[/tex]

Answer:

4k^2-4k+1

Explanation:

Plx give brainlyest

Answer:

It is the first one.

Explanation:

Because yeah.

Answer:

Please provide answer options. :)

Answer:

B. Energy Molecule

Explanation:

Adenosine triphosphate, or ATP, is the primary carrier of energy in cells. The water-mediated reaction known as hydrolysis releases energy from the chemical bonds in ATP to fuel cellular processes. Adenosine triphosphate (ATP), energy-carrying molecule found in the cells of all living things.

Answer:

B. Energy Molecule

Explanation:

It is used for storing and transferring energy in cells.

Answer:

0.59 g

Explanation:

The reaction at the first cathode;

Ag^+(aq) + e -----> Ag

if Q = It = 1.5 * 10 * 60 = 900C

According to Faraday's second law of electolysis; if we pass the same quantity of electricity through different electrolytes, the mass of substances deposited on each cathode is proportional to the equivalent weights.

Equivalent weight E = Atomic mass/valency

For Ag = 108/1 = 108

For Ni = 59/2 = 29.5

Hence

Let m1 = mass of Ag deposited =2.16

Let m2 = mass of Ni deposited

Let E1 = equivalent weight of Ag

Let E2 = equivalent weight of Ni

m1/m2 = E1/E2

2.16/m2 = 108/29.5

m2 = 2.16 * 29.5/108

m2 = 0.59 g

Answer:it’s 12.8cm^2 and I saw that last anwser and he’s not wrong but yeah I had trouble figuring it out but it’s just force divided by area for both tires multiply that by 2

Explanation:

A bicycle weighs 780. pounds. If the pressure exerted by its tires on the ground is 30.5 pounds per square centimeter, the area of one of the two tires that's in contact with the road is 12.8cm².it’s just force divided by area for both tires multiply that by 2.

Pressure is defined as the force applied perpendicular to an object's surface per unit area over which that force is distributed. Gauge pressure is the pressure in relation to the surrounding atmosphere. Pressure is expressed using a variety of units.

Pressure is defined as force per unit area of surface; the SI unit of pressure is the pascal (Pa), which is defined as one newton per square metre (N/m2). An object's pressure is proportional to the force it exerts and inversely proportional to the area over which the force is exerted.

The physical force exerted on an object is defined as pressure. The force applied per unit area is perpendicular to the surface of the objects. F/A is the basic pressure formula (Force per unit area).

Thus, the area of one of the two tires that's in contact with the road is 12.8cm².

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Answer:

Explanation: Elements in group 14 have 4 valence electrons. Meaning that to achieve a stable octet they need to either gain or lose 4 electrons in total. That would take significantly more energy than other elements, e.g., group 1 (alkaline metals) or group 17 (halogens.)

Explanation:

In the periodic table, the elements in column 4 have four valence electrons and are less reactive compared to s- block elements but more reactive than the p-block elements.

Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.

It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.

Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.

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Answer:

1. 40 grams

2. 20 grams

Explanation:

every 10 years, divide by 2

year 0; 80

year 10; 40

year 0; 80

year 10; 40

year 20; 20

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Answer:

Anything below 7.0 is acidic, and anything above 7.0 is alkaline, or basic. pH scale, ranging from 0 (very acidic) to 14 (very basic/alkaline) and listing the pH values of common substances.

Explanation:

PRESS THE CROWN

The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.

Explanation:

Answer:

Both oceanic crust and continental crust are less dense than the mantle, but oceanic crust is denser than continental crust. ... Because continental crust is less dense than oceanic crust it floats higher on the mantle, just like a piece of Styrofoam floats higher on the water than a piece of wood does

Answer:

It is difficult to remove electrons from cations because one or more electrons are already lost and hold of nucleus on remaining electrons increase

Explanation: