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3 years ago

15

Instead of collecting gas with a syringe, another method involves: • Submerging the evidence in a special agent • Placing a stri

p of charcoal in the airtight container • Using a tiny vacuum • All of the above

1 answer:

kirza4 [7]3 years ago

3 0

Using a tiny vacuum

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Which of the following statements is true? Atoms of isotopes of an element have different numbers of electrons. Atoms of isotope

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Answer:

atoms of isotopes of an element have different numbers of neutrons.

Explanation:

isotopes have the same number of protons, but different numbers of neutrons.

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Graciella divided her grapes equally among 6 friends. If each friend received 16 grapes how many grapes did Graciella have?

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Answer: She had 96 grapes.

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A very specific procedure scientists follow when conducting experiments is known as the

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Answer:

Scientific Method.

Explanation:

A scientific method is basically a method or a process when you conduct an experiment. Normally, the process goes like this:

1. You make like a question or something that you want to investigate, it's like the aim of the experiment.

2. You make an experiment and a hypothesis. A hypothesis is basically a guess on how the results of the experiment would turn out. You don't have to be correct for the hypothesis since there is no right or wrong answer.

3. Conduct the experiment. I don't think this needs a detailed explanation since experiments vary from one another.

4. Collect results. The data you collect come in different ways based on your experiment, but it is crucial you get data so that you can answer your question in 1.

5. Make inferences. You can't directly get a conclusion or answer from the results, so inferences are needed.

6. Craft a conclusion or answer. This is the final step when conducting an experiment and the part where you have the answer you needed when you conducted the experiment :)

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3 years ago

What is the percent composition of hydrogen in NH4HCO3?

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To find the Percent Composition of an atom, you use this formula:
Mass of element in the compound you're studying on ( in this case it's 5 since there is 5 Hydrogens) over the mass of the compound (which is here 79), Multiplied by 100 since you want a percent.
So we get:
$\frac{5}{79} * 100$
So you get about:
$0.063 * 100$
$6.3$

So, the percent composition of Hydrogen in NH4HCO3 is 6.3%

Hope this Helps! :D

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Convert .035 gallons to liters

kvasek [131]

.035 gallons equals 0.1324894 L

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4 years ago

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