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3 years ago

What are cells made of?

1 answer:

8 0

Answer: All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.

Explanation: please mark as brainliest

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HELP!!!! ASAP!!!!!!!!!! HOW ARE REACTANTS DIFFERENT FROM THE PRODUCTS ?

raketka [301]

Reactants are what make up the product.

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4 years ago

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Explain in a short sentence how you can tell if a reaction is a double replacement reaction.

Monica [59]

Explanation:

In a double displacement reaction, there is an actual exchange of partners to form new compounds.

The reaction is given as shown below:

AB + CD → AD + CB

One of the following conditions serves as the driving force for a double replacement reaction:

Formation of an insoluble compound or precipitate
Formation of water or any other non-ionizing compound
Liberation of a gaseous product.

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3 years ago

Who did not lead voyages of exploration? Prince Henry da Gama Dias Cabot

Elodia [21]

prince Henry is your answer (:

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4 years ago

How do I know the point which a solid will turn to a liquid?

oee [108]

There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid.

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3 years ago

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Why is the answer C for this problem?

pshichka [43]

Answer:

$\boxed{\text{(C) X}$_{3}$P$_{2}}$

Explanation:

Step 1. Identify the Group that contains X

We look at the consecutive ionization energies and hunt for a big jump between them

$\begin{array}{crc}n & IE_{n} & IE_{n} - IE_{n-1}\\1 & 730 & \\2 & 1450 & 720\\3 & 7700 & 6250\\4 & 10500 & 2800\\\end{array}$

We see a big jump between n = 2 and n = 3. This indicates that X has two valence electrons.

We can easily remove two electrons, but the third electron requires much more energy. That electron must be in the stable, filled, inner core.

So, X is in Group 2 and P is in Group 15.

Step 2. Identify the Compound

X can lose two valence electrons to reach a stable octet, and P can do the same by gaining three electrons.

We must have 3 X atoms for every 2 P atoms.

The formula of the compound is $\boxed{\text{X}$_{3}$P$_{2}}$}$ .

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3 years ago