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4 years ago

Please help. i don’t get what to do

Chemistry

1 answer:

Scrat [10]4 years ago

3 0

I think you were doing it right. Just find something in your kitchen and google the chemical formula. And from that you can see the elements in it. For example:

Salt, NaCl, Sodium and Chlorine.

Baking Soda, NaHCO3, Sodium, Hydrogen, Carbon and Oxygen.

Vinegar, CH3COOH, Carbon, Hydrogen and Oxygen

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Muiltplying 2.5 x 10^10 by 3.5 x 10^-7

andrey2020 [161]

<u>Answer: </u>

The value of $\left(2.5 \times 10^{10}\right) \times\left(3.5 \times 10^{-7}\right)$ is 8750

<u>Solution: </u>

$\left(2.5 \times 10^{10}\right) \times\left(3.5 \times 10^{-7}\right)$

$\Rightarrow\left(2.5 \times 10^{10} \times 3.5 \times 10^{-7}\right)$

$\Rightarrow\left(2.5 \times 3.5 \times\left(10^{10} \times 10^{-7}\right)\right)$

$\Rightarrow(2.5 \times 3.5) \times\left(10^{10+(-7)}\right)$

$\Rightarrow(2.5 \times 3.5) \times 10^{3}$

$\Rightarrow 8.75 \times 10^{3}$

$\Rightarrow 8.75 \times 1000=8750$

6 0

3 years ago

The melting point of copper is 1084°C. How does the energy of the particles in a certain amount of liquid copper compare to the

ipn [44]

The melting point of the solid form of water, which is ice, is 0°C. When we convert both temperatures to kelvin by adding 273 to each we get the melting point of copper as 1357K and that of ice is 273K. Then, dividing the melting point of copper by the melting point of ice, both in absolute temperature scale. The answer would be 4.97. Thus, the energy of molecules of copper is approximately 5 times compared to that of water.

6 0

4 years ago

Nitrobenzene contains 5 hydrogen atoms, 6 carbon atoms, 2 oxygen atoms, and 1 nitrogen atom. what is the chemical formula for ni

ollegr [7]

C₆H₅NO₂

<h3>Further explanation</h3>

Nitrobenzene contains:

5 hydrogen atoms,
6 carbon atoms,
2 oxygen atoms, and
1 nitrogen atom.

The chemical formula for nitrobenzene is C₆H₅NO₂.

Nitrobenzene is one of benzene derivatives, precisely including the type of monosubstituted benzenes.

The molecular structure of phenyl $\boxed{ \ C_6H_5- \ }$ is formed by removing one H atom from the benzene $\boxed{ \ C_6H_6 \ }$ molecule. A substituent is bound to the C atom which loses the H atom so it is called monosubstituted benzene.

In the naming of monosubstituted benzenes, benzene is the parent name and the substituent is indicated by a prefix.

nitro is the substituent
benzene is the parent name

When benzene is reacted with a mixture of concentrated nitric acid and concentrated sulfuric acid, it yields nitrobenzene.

$\boxed{ \ C_6H_6 + HNO_2 \ (with \ H_2SO_4 \ in \ 30^0C-40^0C) \rightarrow C_6H_5NO_2 + H_2O}$

- - - - - - -

<u>Notes:</u>

Benzene and compounds having similar chemical properties to benzene are called aromatic compounds.
Benzene is a colorless, poisonous liquid with a specific odor. it dissolves in organic solvents in organic solvents such as alcohol, ether, and acetic acid. Benzene is also good for non-polar substances.
Nitrobenzene is used in the manufacture of aniline and other organic chemicals. Nitrobenzene is a pale yellow, oily, and highly toxic liquid with the odor of bitter almonds.

<h3>Learn more</h3>

Calculating the pH value of weak base brainly.com/question/9040743
About the solution as a homogeneous mixture brainly.com/question/637791
About the mass and density of substances brainly.com/question/4053884

Keywords: nitrobenzene, contains, 5 hydrogen atoms, 6 carbon, 2 oxygen, and 1 nitrogen. the chemical formula, benzene, monosaturated, phenyl, aromatic compounds

7 0

3 years ago

Read 2 more answers

Which of the following provides the best description of the function of genes?

Schach [20]

Answer:

D. Controlling the production of specific proteins.

Explanation:

Genetic material is the main thing that inherited from parents to their offsprings. Gene encodes proteins that will be expressed(produced) when it needed. The protein can be used to build the cell organ, enzyme enzyme that digest food, hormones, and many other things. By inheriting the gene, the offspring will have a similar traits to the parent. The trait can differ a lot for sexual reproduction since only half of each parent gene inherited to the offspring.

5 0

4 years ago

1. Which is a substance that cannot be broken down into another substance?

grandymaker [24]

Answer:

Atom

Explanation:

my theory:

Atoms are their own substance. It's atom because if you tried to break an atom, you would be going into nuclear physics. That would be unsafe and dangerous.

3 0

3 years ago