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Elza [17]
3 years ago
12

True or false When testing for dna investigators must use all of the sample to make sure they get an accurate test

Chemistry
1 answer:
mamaluj [8]3 years ago
4 0

Answer: true

Explanation:

You might be interested in
In a unimolecular reaction with seven times as much starting material as product at equilibrium, what is the value of keq?
Kitty [74]

<em>K</em>_eq = 0.14

The chemical equation is  

A ⇌ B

The equilibrium constant expression is

<em>K</em>_eq = [B]/[A]

If [A] = 7[B]

<em>K</em>_eq = [B]/{7[B]}= 1/7 = 0.14

6 0
3 years ago
In lab, you calculate the density of an iron rod to be 7.30 g/cm3. The accepted value
OLga [1]

Answer:

<h2>6.41 %</h2>

Explanation:

The percentage error of a certain measurement can be found by using the formula

P(\%) =  \frac{error}{actual \:  \: number}  \times 100\% \\

From the question

actual density = 7.80 g/cm³

error = 7.30 - 7.80 = 0.5

We have

p(\%) =  \frac{0.5}{7.8}  \times 100 \\  = 6.410256...

We have the final answer as

<h3>6.41 %</h3>

Hope this helps you

6 0
2 years ago
Why are properties of covalent compounds so diverse
faltersainse [42]

Answer:

The diversity of physical properties among covalent compounds is mainly because of widely varying intermolecular attractions. ... All of the atoms are covalently bonded to each other.

5 0
2 years ago
A 1300 mL sample of gas with a molar mass of 71.0 g/mol at STP has what density?
Blizzard [7]

Answer:

0.055g/mL

Explanation:

Data obtained from the question include:

Molar Mass of the gass sample = 71g/mol

Volume of the gas sample = 1300 mL

Density =?

The density of a substance is simply mass per unit volume. It is represented mathematically as:

Density = Mass /volume.

With the above equation, we can easily obtain the density of sample of gas as illustrated below:

Density = 71g / 1300 mL

Density = 0.055g/mL

Therefore, the density of the gas sample is 0.055g/mL

6 0
3 years ago
What is the predominant intermolecular force in CBr4
vovikov84 [41]
CBr4 is a symmetric tetrahedral molecule so it will be non-polar.
3 0
3 years ago
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