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zzz [600]
2 years ago
13

Scientific knowledge results from the interaction of scientists who are investigating natural phenomena. Which of these BEST des

cribes how a scientific explanation becomes widely accepted?
Group of answer choices

DNA is not necessary for an organism to reproduce.

Organisms create their own DNA sequence that is not like their parents.

. DNA contains genes that hold specific traits for an organism.

A. DNA is an exact copy from parent to offspring.
Chemistry
1 answer:
seraphim [82]2 years ago
6 0

Answer:

5ywhxhghghghfhffgffgffg

Explanation:

You might be interested in
Suppose that in a particular reaction 10.5 grams of HCl (36.5 g/mol) react with excess NaOH and 19.3 grams of NaCl (58.5 g/mol)
JulijaS [17]

Answer:

The answer to your question is 114.7% the percent is higher than expected.

Explanation:

Data

mass of HCl = 10.5 g

molar mass of HCl = 36.5 g

mass of NaOH = 19.3 g

molar mass of NaOH = 58.5

Process

1.- Write the balanced chemical reaction

                    HCl  +   NaOH   ⇒    NaCl  +  H₂O

2.- Calculate the theoretical yield

                    36.5 g of HCl -------------- 58.5 g of NaCl

                     10.5 g of HCl --------------  x

                     x = (10.5 x 58.5)/36.5

                     x = 16.83 g

3.- Calculate the percent yield

                     % yield = (19.3/16.83) x 100

                     % yield = 114.7

6 0
3 years ago
Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 97. g of octane is mi
zhannawk [14.2K]

Answer: 61 grams

Explanation:

To calculate the number of moles, we use the equation:

\text{Number of moles of octane}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{97g}{114g/mol}=0.85moles

\text{Number of moles of oxygen}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{150g}{32g/mol}=4.69moles

The chemical equation for the combustion of octane in oxygen follows the equation:

2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O

By stoichiometry of the reaction;

25 moles of oxygen react with 2 moles of octane

4.69 moles of oxygen react with=\frac{2}{25}\times 4.69=0.37  moles of octane

Thus, oxygen is the limiting reagent as it limits the formation of product and octane is the excess reagent.

25 moles of oxygen produce 18 moles of water

4.69 moles of oxygen produce=\frac{18}{25}\times 4.69=3.38  moles of water.

Mass of water produced=moles\times {\text{Molar mass}}=3.38\times 18g/mol=61g

The maximum mass of water that could be produced by the chemical reaction is 61 grams.

6 0
2 years ago
If you take a 15.0-mL portion of the stock solution and dilute it to a total volume of 0.600 L , what will be the concentration
alexira [117]

15 \div .6
6 0
3 years ago
In the current model of the atom, ___. electrons and protons are mixed together in a solid sphere electrons orbit around the pos
kati45 [8]
Neutrons and protons are in the nucleus
electrons are on shells which orbit the nucleus
5 0
2 years ago
Which of the following best explains velocity?
zhannawk [14.2K]
Velocity is explained as the *speed and *direction something might move.  Speed means moving and Direction means a certain way (not stationary.)

Hope this helps!
8 0
2 years ago
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