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frozen [14]
3 years ago
9

How many milliseconds are there in 3.5 seconds

Chemistry
2 answers:
madam [21]3 years ago
8 0
There are 3500 milliseconds.
azamat3 years ago
5 0
There are 3,500 milliseconds in 3.5 seconds. Hope this helps!
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There are 2 grams of sulfur and 0.45 grams of copper. What is the
Elanso [62]

Answer:

18.3%

Explanation:

Add the numbers together, and then take the number of grams of the substance, in this case copper, not coppper lol. divide the .45 by 2.45 to get 18.3

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3 years ago
NEED A AWNSER ASAP PLEASE!!!!
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Last one cuz it stay in the air for a while then swings making it kinetic
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2 years ago
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How many hydrogen atoms are in 35.0 grams of hydrogen gas? How many hydrogen atoms are in 35.0 grams of hydrogen gas? 4.25 × 102
Ede4ka [16]

Answer: 2.12\times 10^{25} atoms of hydrogen are there in

35.0 grams of hydrogen gas.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{35.0g}{2g/mol}=17.5moles

1 mole of hydrogen (H_2) = 2\times 6.023\times 10^{23}=12.05\times 10^{23} atoms

17.5 mole of hydrogen (H_2) = \frac{12.05\times 10^{23}}{1}\times 17.5=2.12\times 10^{25} atoms

There are 2.12\times 10^{25} atoms of hydrogen are there in

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8 0
3 years ago
What type of a reaction takes place when atoms or molecules rearrange to form new substances
GREYUIT [131]
A chemical reaction happens when the atoms or molecules rearrange to form a new substance


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A cheetah can run 112km/h over a 100-m distance. what is this speed in meters per second
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Also, the "100-m-distance" part of the question is just to throw you off, because one particular speed obviously stays constant over any distance. Hope that helps :)
7 0
3 years ago
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