3 years ago

To change a substance from one state to another, __________ must be added or removed.

Chemistry

1 answer:

mrs_skeptik [129]3 years ago

6 0

Energy I think that is the answer.

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3. What do we call atoms of the same elements with different mass numbers?

Talja [164]

Answer:

Isotopes

Explanation:

We call atoms of the same elements with different mass numbers isotopes.

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3 years ago

usando el concepto de valencia para los elementos S, P Y Br predice las formulas de los compuestos mas simples formados por esto

hram777 [196]

Explanation:

Teniendo en cuenta los numeros de oxidacion negativos de cada uno

P:fosforo(-3)

S:Azufre (-2)

Br:Bromo (-1)

Y el H: hidrogeno con una valencia

positiva de +1

los compuesto que se formaran son los siguientes

1 H3P= fosfuro de hidrogeno

2 H2S= sulfuro de hidrogeno

3 HBr= Acido bromhidrico

ESPERO ABERTE AYUDADO ;D

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2 years ago

Use the graph to answer these questions. The total energy of the reactants is –3,811.92 kJ. –1,273.02 kJ. –2,538.90 kJ.

TEA [102]

Answer:

the first one

Explanation:

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Pre-lab questions 1. a concentration gradient affects the direction that solutes diffuse. describe how molecules move with respe

VLD [36.1K]

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3 years ago