3 years ago

How can you compare the DNA in your brain cells to the DNA in your heart cells ?

1 answer:

8 0

The DNA is identical because all of your cells came from that one cell through mitosis which gives and exact copy of the DNA. All body cells got the complete "instruction manual" for the body, but only uses the proteins needed.

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The average atomic mass recorded on the periodic table for krypton is 83.80 u. This indicates that the most abundant isotope of

Trava [24]

Krypton-84 is the most abundant type of Krypton. The answer is C.

If you need this to be explained, I will do my best it's a bit difficult to say how to find it out, but I will if you need me to.

7 0

2 years ago

How many moles are in 83.1g of CaBr2

9966 [12]

Answer:

0.416 mol CaBr₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

83.1 g CaBr₂

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Molar mass of Br - 79.90 g/mol

Molar Mass of CaBr₂ - 40.08 + 2(79.90) = 199.88 g/mol

Step 3: Convert

$83.1 \ g \ CaBr_2(\frac{1 \ mol \ CaBr_2}{199.88 \ g \ CaBr_2} )$ = 0.415749 mol CaBr₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.415749 mol CaBr₂ ≈ 0.416 mol CaBr₂

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3 years ago

The reaction in Fe + O2→Fe2O3 is an example of a(n): A. combination reaction. B. decomposition reaction. C. aqueous reaction. D.

motikmotik

This is a combination reaction because two molecules becomes one

A + B ---> AB

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3 years ago

The reaction between sodium and chlorine that forms table salt is shown

Olegator [25]

Answer: 2 Na (s) + Cl(g) -> 2 NaCl (s)

Explanation:

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3 years ago

What does an object's apparent size depend on?

ipn [44]

Answer:

D. its actual size and distance from an observer

Explanation:

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2 years ago