The pH scale is used to tell if a substance
is an acid or base. Substances with a pH
of 7 are neutral. An acid is anything
below 7 and a base is anything above
7.What would a household cleaner with a
pH of 10 be considered on the pH scale?

Answer:

The graph represents an endothermic reaction.

The products have more energy than the reactants.

80kJ

160kJ

80kJ

160kJ

The given graph is representing an endothermic reaction as the potential energy reactants are lower than that of the products.

ΔH of the reaction and activation energy is 80 KJ and 160 KJ respectively.

An endothermic process can be defined as a process with an increase in the enthalpy H of the system. An endothermic process involves an increase in the temperature of the system.

Whether a process occurs spontaneously depends not just on the enthalpy change but also on the entropy change and temperature.

From the graph, the potential energy of the reactants = 80 KJ

The potential energy of the products = 160 KJ

ΔH of the reaction, ΔH = PE(products) - PE(reactants)

ΔH = 160 -80 = 80 KJ

The activation energy (Ea) of this reaction will be:

Activation Energy (Ea) = Maximum Energy - PE(reactants)

Activation Energy = 240 - 80 = 160 KJ

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Answer:

the addition of chlorine gas to a solution of potassium iodide.

The reaction that produces a colored substance is the addition of chlorine gas to a solution of potassium iodide. The correct option is D.

In a chemical reaction, reactants undergo a chemical reaction and transform into products through a chemical process. For instance, when humans breathe in oxygen, it combines with glucose to create carbon dioxide, water, and energy.

Another sign that a chemical reaction has taken place is a change in color. If two solutions are combined and a color change occurs that is not just the effect of diluting one of the reactant solutions, a reaction has taken place. A solid and a liquid combined may also result in a change in color.

Therefore, the correct option is D. The addition of chlorine gas to a solution of potassium iodide.

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Answer:

The answer is C.  Because particles can never stop moving

Explanation:

"All matter has thermal energy, even matter that feels cold. That's because the particles of all matter are in constant motion and have kinetic energy."

Answer:

4.816x10²⁴atoms

Explanation:

the number of moles of oxygen is 8

let x be number of oxygen atoms

recall that 1 mole=6.02x10^23 atoms

therefore, 8 moles =x

cross multiply

8 x 6.02 x 10^23 = x

x = 4.816 x 10²⁴atoms

Answer:

NaNO3

balanced equation - Na2CO3 + Sn(NO3)2 → 2NaNO3 + Sn(CO3)

Answer= C) CN contains a covalent bond.

Answer:

The atomic number would be 12.

Explanation:

A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons.

Answer:

7.8286e+23

Explanation:

Use Avogadro's number

Answer: The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Explanation:

Answer:

a) Fe

b) Fe

c) Fe

Explanation:

When using their stoichiometric ratios, in all of the the iron will run out before the oxygen, making the iron the limiting reactant.

Answer:

a because the others whould cause earthquakes

Explanation:

Answer:

A

Explanation:

because i think is A (if is not im sorry )

Answer:

compounds

Explanation:

Answer: The correct pairs of elements likely to form ionic compounds are, potassium and sulfur, magnesium and chlorine. The answer is argon please give me brainlist

Explanation:

Answer:

6.25s

Explanation:

time = distance / speed

time = 50 / 8

time = 6.25s

Answer:

Because the exact position of the electron is not known,it must be assumed that the electron takes up the entire space in an orbital.

Explanation:

Answer: It is conserved.

Explanation: When the box is pushed across the floor, then floor and box becomes warm which resembles the condition of conservation of energy.

The given problem can be resolved by the concept of energy conservation. The statement of energy conservation says that, "Energy is neither be created nor be destroyed, but it is converted from one form to another.

In the given problem, the person pushes the box across the floor, such that the mechanical energy from the moving arms of person is transferred to the box, and the box and floor becomes warm.

During this process, the energy from the person moving arm is transferred to the box in the form of kinetic energy. And thus kinetic energy is then being transferred to thermal energy or heat energy, due to which the box and floor becomes warm.

Thus, we can conclude that the given case reflects the process of transformation of energy from one state to another, which highlights that during the process, energy is conserved.

Answer:

cell

Explanation:

Cells are the most simple, basic units of life

Answer:

the CELL is the basic unit of life.

Explanation:

I had this is my science lesson

have a great day!

hope this helps!

feel free to mark as brainliest! ;)

Answer:

RBCs are disc-shaped with a flatter, concave center. This biconcave shape allows the cells to flow smoothly through the narrowest blood vessels. ... Many RBCs are wider than capillaries, but their shape provides the needed flexibility to squeeze through

Answer: C

Explanation: This is because of a nice thing called guessing

Answer:

about 4 or 4.8

Explanation:

This question is providing the masses of carbon dioxide and oxygen gases at 10.0 atm as 66 g and 16 g respectively, and is asking for the partial pressure of the former which turns out to be 7.50 atm after doing the math.

Thus, we can start solving this problem with the Dalton's law approach, in order to make a relationship for the total pressure, partial pressure and mole fraction, which means we must first determine the mole fraction of carbon dioxide gas in the mixture as shown below:

[tex]x_{CO_2}=\frac{n_{CO_2}}{n_{CO_2}+n_{O_2}}[/tex]

Next, we calculate the moles of both gases by dividing the grams over the molar masses:

[tex]n_{CO_2}=\frac{66g}{44.01g/mol} =1.50mol\\\\n_{O_2}=\frac{16g}{32g/mol} =0.5mol[/tex]

Then, the mole fraction of carbon dioxide as the required one by plugging in the previously calculated moles:

[tex]x_{CO_2}=\frac{1.5}{1.5+0.5}=0.75[/tex]

Finally, we use the definition of the Dalton's law to calculate the partial pressure of carbon dioxide gas in the binary mixture:

[tex]P_{CO_2}=x_{CO_2}P\\\\P_{CO_2}=0.75*10.0atm\\\\P_{CO_2}=7.50 atm[/tex]

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Answer:

Because in order to have cis or trans configuration both carbon of alkene need to have a hydrogen

Answer:

because of the location of the 6 the answer is 6 cent

Answer:

Hundredths

Explanation:

$6 times 1/$100. The 0 is tenths, the 6 is hundredths and the 1 is thousandths.

Answer:renewable resources

Explanation:

Answer:

-1.76202

Explanation: Because the operation is subtraction, you would count the number of digits after the decimal point. Then you would perform the operation and round your answer to the SMALLER number of digits after the decimal point.

Answer:

8 i believe

Explanation:

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the number of neutrons in the given atom is 8.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Mass number =number of protons + number of neutrons

Atomic number = number of protons= number of electrons

18  =10 + number of neutrons

number of neutrons=8

Therefore, the number of neutrons in the given atom is 8.

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Answer:

Genes mainly, however the environment as well

Explanation:

Answer: B. no

Explanation: