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Neko [114]
3 years ago
8

What are primitive one celled microorganisms visible to humans only through the use of a microscope

Advanced Placement (AP)
1 answer:
pogonyaev3 years ago
3 0

Answer:

Amoebas are simply single celled organisms. As such, they can only be viewed using a microscope.

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Examine the structure of the early Christian church. What challenges did the church face? Relate the rise of the church to Roman
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The early christian church had to suffer a lot of persecutions because they did not worship the roman gods. The rise of the church relates to roman history because when Rome was just getting formed it was just a tiny village. The early christian was made up of a few disciples and apostles.        My info might not be accurate.
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1. I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?
zmey [24]

Answer:

1. echo 2. candle 3.  i think a map

Explanation:

8 0
3 years ago
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Neko [114]

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4 0
3 years ago
Suppose you have 61.8 grams of elemental chromium. How many grams would be the isotope chromium - 50?
lilavasa [31]

Answer:

The mass of the isotope Chromium-50 would be 2.685 grams in 61.8 grams of elemental Chromium.

Explanation:

Natural chromium (Cr) is composed of four stable isotopes: ^{50} Cr (4.345 % abundance), ^{52}Cr (83.789 % abundance), ^{53}Cr (9.501 % abundance) and ^{54}Cr (2.365 % abundance). We can obtained the total mass of the isotope Chromium-50 (m_{^{50}Cr}), measured in grams, by multiplying the mass of elemental chromium (m_{Cr}), measured in grams by percentage ratio (r), dimensionless. That is:

m_{^{50}Cr} = \frac{r}{100}\cdot m_{Cr}

If we know that r = 4.345 and m_{Cr} = 61.8\,g, then the mass of isotope Chromium-50 would be:

m_{^{50}Cr} = \frac{4.345}{100}\cdot (61.8\,g)

m_{^{50}Cr} = 2.685\,g

The mass of the isotope Chromium-50 would be 2.685 grams in 61.8 grams of elemental Chromium.

8 0
4 years ago
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