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Scrat [10]
3 years ago
12

Read the paragraph from the section "Thick Tissue

Chemistry
1 answer:
almond37 [142]3 years ago
4 0
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Heating the marshmallows over the hot plate showed the idea of
zloy xaker [14]
Answer:

the answer is either B or C

explanation:

brainliest?
6 0
2 years ago
Read 2 more answers
¿Qué establece la ley de la conservación de la materia? Explicar.
masya89 [10]

La materia no se crea ni se destruye solo se transforma

Explanation:

«En toda reacción química la masa se conserva, es decir, la masa total de los reactivos es igual a la masa total de los productos».

Los átomos ni de crean ni se destruyen,durante una reacción química.Por lo tanto una ecuación química ha de tener el mismo numero de atomos de cada elemento a ambos lados de la flecha. Se dice entonces que la ecuación esta balanceada

Espero y te sirva!!

5 0
3 years ago
Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom. The four qu
Nostrana [21]

Answer:

a), b), c) & f)

Explanation:

d) does not apply because Ms value can be either +½ or -½

e) does not apply because Ml - values range from -l to +l, hence l= 2 doesn't exist when l= 1

3 0
3 years ago
7. Citric acid contains 37.5 g C, 58.3 g 0, and 4.2 g H and the MW= 192, what is
MrRa [10]

Answer:

2

Explanation: sceintific calculator

7 0
3 years ago
I know that the answer is C. 8, but can you explain step by step how to get that answer?
Leya [2.2K]

Answer:

8

Explanation:

Oxidation:

Fe^{2+} -->Fe^{3+}+e^{-}

Reduction:

Cr_{2}O_{7}^{2-}+6e^{-} -->2Cr^{3+}

We have to equalise the number  of moles of electrons gained and lost in a redox reaction in order to get a balanced reaction.

Hence we have to multiply the oxidation reaction throughout by 6.

and adding the two half-reactions we obtain:

6Fe^{2+}+Cr_{2}O_{7}^{2-} -->6Fe^{3+}+2Cr^{3+}

Still the total charge and number of oxygen is not balanced.

Since the reaction takes place in acidic conditions, we will add required number of H+ to the appropriate side to balance the charge and add half the amount of H2O to balance the hydrogen atoms.

We add 14 H+ on LHS and 7H2O on RHS to obtain:

6Fe^{2+}+Cr_{2}O_{7}^{2-}+14H^{+} -->6Fe^{3+}+2Cr^{3+}+7H_{2}O

Sum of coefficients of product cations = 6+2 = 8

4 0
3 years ago
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