Na + H2 → NaCl balanced equation

Answer:

28.9

Explanation:

4.5+24.4

= 28.9

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[tex]\\ \rm\Rrightarrow pH=-log[H^+][/tex]

[tex]\\ \rm\Rrightarrow pH=-log(2.4\times 10^{-6})[/tex]

[tex]\\ \rm\Rrightarrow pH=-log2.4-log10^{-6}[/tex]

[tex]\\ \rm\Rrightarrow pH=-0.38+6[/tex]

[tex]\\ \rm\Rrightarrow pH=5.62[/tex]

Answer:

Oxygen is one of the most abundant elements on Earth. Oxygen accounts for 20.9% of the atmosphere, 45% of the Earth's crust (as oxide minerals) and also accounts for almost all of the mass of water on Earth (89%). It is found in a huge number of natural minerals including sulfates, phosphates, carbonates and oxides.

Explanation:

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Answer:

that's not good

Explanation:

microbes???? not good for a sewage system

Answer:

Explanation:

i) Red as Methyl orange shows red color in acidic medium and hyrdochloric acid is acidic.

ii) In 10cm^3 of 0.100 mole/dm^3 of hydrochloric acid, there are:

10/1000*0.1 = 1.00x10^(-3) moles of hydrochloric acid were used.

Answer:

Water is the answer

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Answer:

[tex]\huge\boxed{\sf Distillation}[/tex]

Explanation:

Since, both of the chemicals are liquids, we can separate it by the process of distillation.

Distillation:

How it works:

Since chloroform has less boiling point, it will evaporate and collected first and benzene will follow it after sometime.

- Apparatus of distillation is in the attached file.

[tex]\rule[225]{225}{2}[/tex]

Answer:

a-b and e-f

Explanation:

At these intervals, there is no change in distance covered as time continues.

Explanation:

magnet will attract iron.

salt and water is left behind

The ionization potential of Ba(OH)2 was found to be 8±1 eV, with a value of 6±1 eV for the monohydroxide.

Answer:

breathing

Explanation:

Your welcome lol

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Answer:

SEE BELOW

Explanation:

The act or process of breathing i.e the inhaling of oxygen and the exhaling of carbon dioxide. The process in which cells use oxygen to break down sugar and obtain energy which is used for various purposes.

Answer: not sure on actual answer, but heres a answer on a similar question with just different quantities.

Explanation: just minus the terms i got and u should be okay

Answer:

1. LR: Cl2,      ER: Al                2. LR: CHCl3

Explanation:

1. Find g/moles of Al and Cl2

g/moles of Al: 0.74 and Cl2 is 0.42

We can find the limiting reactant by take those number divided by 2 and 3

0.74 divided by 2 = 0.37

0.42 divided by 3 = 0.14 so 0.14 is the least -> that going to be the limiting reactant. (Cl2)

Now we know Al is a excess reactant.

2. That equation is already balanced and it's already give us 0.36 mole of chlorine, now we just need to find the mole of chloroform ( CHCl3 )

To do that we need to find the molar mass of CHCl3 which is 119.0 g/moles

then take 25 grams ÷ by 119g/moles we will get: 0.21 mole of CHCl3 that's mean CHCl3 is a limiting reactant.

Answer:

Alchemy is based on mystic view of reality whereas chemistry is based on experiments, observations and facts.

Answer:

Increasing substrate concentration also increases the rate of reaction to a certain point. Once all of the enzymes have bound, any substrate increase will have no effect on the rate of reaction, as the available enzymes will be saturated and working at their maximum rate.

Answer:

No, a hypothesis can only become a fact if the outcome happens over and over. A theory means that it could be true but the outcome can also be false.

Explanation:

Ivan Pavlov is most known for demonstrating conditioned lreflex in dogs.

Conditioned reflex is a reflex action which has been conditioned to occur even without the stimulus which produces the reflex.

Ivan Pavlov is known to demonstrate conditioned reflex in dogs.

In his experiment, he trained dogs to salivate at the sound of a bell even if food which is the stimulus that produces salvation was not present.

Learn more about conditioned reflex at: https://brainly.com/question/24968947

Answer:

A conditioned reflex is a reflex action that has been trained to occur even when the stimulus that causes the reflex is not present.

Ivan Pavlov is recognized for using dogs to illustrate conditioned reflexes.

He trained dogs to salivate at the sound of a bell even when food, the stimulus that induces salvation, was not present in his experiment.

Explanation:

Explanation:

use the diagram above to understand it

Answer:

1.  Splitting

2. Combine

Explanation:

Answer:

Percent composition = mass of element in the compound/mass of compound × 100

In this case, the mass of the compound is its molar mass.

Percent Composition of N in CO(NH2)2 (urea)

Molar mass CO(NH2)2 = 60.056 g/mol

Mass of N = 2×14.007 g/mol = 28.014 g/mol

%N: 28.014 g/mol/60.056 g/mol × 100 = 46.646%

Percent Composition of N in NH4NO3 (ammonium nitrate)

Molar mass of NH4NO3 = 80.044g/mol

Mass of N = 2×14.007 = 28.014 g/mol

%N: 28.014 g/mol/80.044 g/mol × 100 = 34.998%

Hope this helps, please let me know If I'm wrong.

Answer:

Humans :)

Explanation:

Humans have killed so many species of wolves, deer, tigers, lions and bears oh my!

In the food chain, we, humans are at the top because of this

The type of inheritance displayed by the illustration is incomplete dominance.

It is a kind of inheritance in which one of the two alleles of a gene exerts incomplete influence on the other allele.

For example, a cross of white and red flower plants yielding a plant with pink flowers. It means that the dominance of the red or pink allele is incomplete.

The same is applicable to a blue fish mating with a yellow fish to produce green offspring. A blend of the two colors occurred.

More on incomplete dominance can be found here: https://brainly.com/question/14053639

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Answer:

1.) Cu(NO₃)₂ + 2 NaOH --> Cu(OH)₂ + 2 NaNO₃

2.) CuO + 2 HCl --> H₂O +  CuCl₂

Explanation:

Both of these reactions are substitution/double displacement reactions. The base reaction looks like this: AX + BY --> AY + BX. In other words, the negative ion of the first molecule bonds to the positive ion of the second molecule, and vice versa.

The products of the first equation are:

Cu(NO₃)₂ + NaOH --> Cu(OH)₂ + NaNO₃

The OH⁻ and the NO₃⁺ are polyatomic ions, meaning they stay together in these types of reactions. When determining the products, make sure to take note of the charges on the ions because subscripts may be necessary to balance them out.

Now you need to balance the coefficients. When balancing equations, begin with an element that is not present in more than one molecule on either side (ex. the oxygen is in two molecules on the reactant side). Keep in mind that the subscripts should be multiplied by the coefficients when determining the number of some elements.

The balanced first equation is:

Cu(NO₃)₂ + 2 NaOH --> Cu(OH)₂ + 2 NaNO₃

The process for the second equation is nearly identical to the first. The balanced second equation is:

CuO + 2 HCl --> H₂O +  CuCl₂

•Why do you feel the force of Earth's gravity?

Answer:

•Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That's what gives you weight. And if you were on a planet with less mass than Earth, you would weigh less than you do here.

Explanation:

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After boiling the mixture of iron salt, water

iron, and salt it will remain and water will be evaporated

Answer:

hydrogen bond exists between nucleotides

Answer:

phosphodiester

Explanation:

Noncovalent hydrogen bonds connect the nucleotides that make up each DNA strand. Individual hydrogen bonds are weaker than covalent bonds like phosphodiester bonds. But they are so numerous that they strongly connect the two DNA polymers.

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