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devlian [24]
3 years ago
6

What is the mass percentage of calcium in calcium carbonate CaSO4?

Chemistry
1 answer:
pav-90 [236]3 years ago
3 0
40.04% yep I’m sure
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Plz help!<br><br> How is oxygen an element? Explain.
MrMuchimi
Yes. It is element No. 8 on the periodic table.
5 0
3 years ago
1. El metodo cientifico pretende sistematizar el proceso de obtención del conocimiento cientifico, evitar la subjetividad en los
____ [38]

Answer:

La afirmación es verdadera.

Explanation:

El método científico es un método de  investigación usado principalmente en la producción de conocimiento en las ciencias y se define como un procedimiento para tratar un conjunto de problemas. En ciencia, el método científico es la estrategia para la investigación y la exploración de lo desconocido.

Por lo que el método científico es el procedimiento mediante el cual es posible alcanzar un  conocimiento objetivo de la realidad, tratando de dar respuesta a las interrogantes  acerca del orden de la naturaleza.

Para ser científico, un método de investigación debe basarse en la empírica y en la  medición, sujeto a los principios específicos de las pruebas de razonamiento.

El método científico se basa en la reproducibilidad, es decir, la  capacidad de repetir un determinado experimento, en cualquier lugar y por cualquier  persona, y la refutabilidad,  es  decir toda proposición científica tiene que ser susceptible de  ser falsada o refutada.

Entonces <u><em>la afirmación es verdadera.</em></u>

6 0
3 years ago
PLEASE HELP!! <br> this is on USAtestprep <br> a)<br> b)<br> c)<br> d)
kaheart [24]
The answer is D!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
3 0
3 years ago
Radioactive cobalt-60 is frequently used in treating cancer. It took 24 years for a 10 gram sample to decay to 0.625 grams. What
-BARSIC- [3]

Answer:

Half life is 6 years.

Explanation:

T½ = In2 / λ

Where λ = decay constant.

But N = No * e^-λt

Where N = final mass after a certain period of time

No = initial mass

T = time

N = 0.625g

No = 10g

t = 24 years

N = No* e^-λt

N / No = e^-λt

λ = -( 1 / t) In N / No (inverse of e is In. Check logarithmic rules)

λ = -(1 / 24) * In (0.625/10)

λ = -0.04167 * In(0.0625)

λ = -0.04167 * (-2.77)

λ = 0.1154

T½ = In2 / λ

T½ = 0.693 / 0.1154

T½ = 6.00 years.

The half life of radioactive cobalt-60 is 6 years

5 0
3 years ago
What is Science?
DENIUS [597]

Answer:

jesus

Explanation:

Jesus is always the answer LOL

3 0
2 years ago
Read 2 more answers
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