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Marrrta [24]
2 years ago
8

Which of the following hypotheses is testable by using the scientific method?

Chemistry
1 answer:
Paraphin [41]2 years ago
5 0

Answer:

D

Explanation:

Because it is the only was that you can test using the scientific method.

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Eroded soil carried off by water, wind, glaciers, or gravity is called __.
ankoles [38]
A. Sediment

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5 0
3 years ago
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What is the mass of a piece of iron if its density is 1.98 g/mL and its volume is 2.45 mL?
viktelen [127]

Answer:

4.858 g

Explanation:

Start with the formula

density = \frac{mass}{volume}

density = 1.98 g/mL

volume = 2.45 mL

mass = ??

rearrange the formula to solve for mass

(density) x (volume) = mass

Add in the substitutes and solve for mass

1.98 g/mL x 2.45 mL = 4.858 g

3 0
3 years ago
Help! I need to finish work. Brainlist will be given to the most helpful!
Soloha48 [4]

Answer:

1. matches with elements.

2. matches with compounds.

3. matches with atoms

4. matches with weight

5. matches with gas

6. matches with carbon dioxide

7. matches with Mendeleev (there's an element named after him)

8. matches with IUPAC

Hope that helped :)

7 0
2 years ago
Which of the following illustrates a longitudinal wave?
monitta

Answer:

figure no. A is right answer.......

7 0
2 years ago
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If one gram of sulphur dioxide contains x molecules what will be the number of molecules in 1g of methane
evablogger [386]

The ratio of molecules in sulphur dioxide and methane will be the same as the ratio of their moles. So, first of all we should find out the number of moles of sulphur dioxide in 1 gram of sulphur dioxide in 1 gram of sulphur dioxide, and the number of moles of methane in 1 gram of methane. This can be done as follows :

(i) The molecular formula of sulphur dioxide is SO_{2}

So, 1  mole of SO_{2} = Mass of 2'O'

=32+2*16

= 64 grams

Now, 64g of sulphur dioxide = 1 mole

So, 1g of sulphur dioxide = \frac{1}{64} mole

Thus, we have \frac{1}{64} mole of sulphur dioxide and it contains molecules in it. Now, since equal moles of all the substance contain equal number of molecules, therefore, \frac{1}{64} mole of methane will also contain x molecules of methane.

(ii) Molecular formula of methan is CH_{4}

So, 1 mole of CH_{4}  = Mass of C + Mass of 4 H

=12+4*12

Now, 16g of methane = 1 mole

So, 1 g of mathane = \frac{1}{16} mole

We know that:

\frac{1}{64} mole of methane contains = x molecules

So, \frac{1}{16}  mole of contains will contain =\frac{x*64}{16} molecules

=4x molecules

7 0
2 years ago
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