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2 years ago

Question 3 (1 point) What is the relationship between a chromosome and DNA?

Chemistry

1 answer:

creativ13 [48]2 years ago

3 0

Answer:chromosome is made of DNA. DNA is double helix structure made of sugar, phosphorus and nitrogen bases.

Explanation:

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The edge of the card measures 2.5 inches, what is it in cm?

Citrus2011 [14]

Answer:

6.35 centimeters

Explanation:

2.5 inches = 6.35 centimeters

Formula:

multiply the value in inches by the conversion factor '2.54'.

So, 2.5 inches = 2.5 × 2.54 = 6.35 centimeters.

4 0

1 year ago

What is the maximum amount in moles of P2O5P2O5 that can theoretically be made from 112 gg of O2O2 and excess phosphorus

Nastasia [14]

Answer:

$n_{P_2O_5}^{max}=1.4molP_2O_5$

Explanation:

Hello!

In this case, since the reaction between phosphorous and oxygen to form diphosphorous pentoxide is:

$2P+\frac{5}{2}O_2\rightarrow P_2O_5$

Thus, since phosphorous is in excess and oxygen and diphosphorous pentoxide are in a 5/2:1 mole ratio, we can compute the maximum moles of product as shown below:

$n_{P_2O_5}^{max}=112 gO_2*\frac{1molO_2}{32.00gO_2}*\frac{1molP_2O_5}{5/2molO_2}\\\\ n_{P_2O_5}^{max}=1.4molP_2O_5$

Best regards!

5 0

2 years ago

C. Another radioisotope of americium exists which has an atomic mass of 242.

ollegr [7]

Answer:

1 g

Explanation:

The half-life of Am-242 (16 h) is the time it takes for half of it to disappear.

We can make a table of the mass left after each half-life.

$\begin{array}{cccc}\textbf{No. of} & & \textbf{Percent} & \textbf{Mass}\\\textbf{Half-lives} & \textbf{Time/h} & \textbf{Remaining} & \textbf{Remaining/g}\\0& 0 & 100 & 8\\1 & 16 &50 & 4\\2 & 32 & 25 & 2\\3 & 48 & 12.5 & 1\\4 & 64 & 6.25 & 0.5\\\end{array}$

The mass remaining after 48 h is 1 g.

7 0

2 years ago

Which statement describes the light reaction of photosynthesis?

cupoosta [38]

Answer:

Explanation:

water molecules are combined to make food

5 0

2 years ago

Material

ziro4ka [17]

What are you trying to ask

5 0

2 years ago