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nikklg [1K]
3 years ago
10

Pretend your friend was absent from class today...

Chemistry
2 answers:
NemiM [27]3 years ago
7 0
Incomplete question
Dovator [93]3 years ago
5 0

Answer:

how and why elements what?? why they exist?? im gonna assume that's what you meant, so elements exist because we're all on earth and without elements, we don't have resources to live. the earth is made of elements and if there were none, we wouldn't even have a planet

Explanation:

^

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In a chemical reaction, the reactants (beginning elements or compounds) but have the same number and type of atoms as the produc
AleksAgata [21]

Answer:The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. ... There are two oxygen atoms in the reactants and two atoms of oxygen in the product.

Explanation:

4 0
3 years ago
Read 2 more answers
Which particles give the nucleus its positive charge?
Mnenie [13.5K]

Answer:

protons only

Explanation:

proton is present in the nucleus of atom as sub atomic particle ..

proton has + charge in the it's top as p+..

6 0
3 years ago
Carbohydrates are polymers of what monomer?​
Leona [35]

Answer:

Yes, carbohydrates have both monomers and polymers. Monomers of carbohydrates are monosaccharides (mono- one; saccharide- sugar) which are simple sugars like glucose, fructose and galactose. Polymers of carbohydrates or polysaccharides include starch...

Explanation:

3 0
4 years ago
Which solution is the most concentrated
san4es73 [151]

Answer:

The most concentrated solution is the one with the highest molarity. Molarity is calculated by taking the moles of solute/ liters of solution. The already gave you the molarity, so you do not need to calculate it. The most concentrated solution is the 0.25 M KCl.

Hope this helps!

5 0
3 years ago
Ayuda plis :(<br>Cuando una reacción es de orden cero: ¿porqué se llama orden cero?​
KiRa [710]

Answer:

Revisa la explación detallada, por favor.

Explanation:

¡Hola!

En este caso, teniendo en mente la definición de ley de velocidad, es posible recordar que esta tiene la forma genérica:

r=k[A]^m

En donde k es la constante de velocidad, [A] la concentration de cualquier especie A en la reacción y m el orden the reacción. Ahora, hay tres órdenes de reacción, cero, primer, y segundo orden, y esto pasa cuando m=0, m=1 y m=2 respectivamente. Por lo tanto, si la reacción es de orden cero, la rapidez de reacción resulta igual a la constante de velocidad dado que la concentración estaría elevada a la cero y por consiguiente siempre tendrá valor de 1, por lo que la concentración no afecta la velocidad de reacción. Esto anterior se expresa como:

r=k[A]^0\\\\r=k

¡Saludos!

3 0
3 years ago
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