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Arte-miy333 [17]
2 years ago
6

What is the formula for mass number?

Chemistry
1 answer:
Oxana [17]2 years ago
5 0

Answer:

the formula for mass number is "mass number = protons + neutrons".

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A geologist finds a section of rock that shows was ripple marks. What does it he pr send me or a ripple marks say about the area
n200080 [17]
A beacuse the rock starts to tear away from the water which will then create ripple marks
3 0
3 years ago
What are the hydrogen bonding atoms in melatonin?
nydimaria [60]

The hydrogen bonding atoms in melatonin are phospholipids and cholesterol.

<h3>What is Hydrogen bonding?</h3>

This is the type of interaction which involves a hydrogen atom being covalently bound to a more electronegative "donor".

Melatonin controls sleep-wake cycle and has phospholipids and cholesterol which have high affinity for hydrogen bonding.

Read more about Hydrogen bonding here brainly.com/question/12798212

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6 0
1 year ago
At high temperatures, sulfur combines with iron to form brown-black iron(II) sulfide:
taurus [48]

The percent yield : 79.9%

<h3>Further eplanation </h3>

Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

Fe(s)+S(s)⇒FeS(s)

The reaction produces 6.29 g of iron(II) sulfide⇒an actual yield

The maximum  amount that can be produced is 7.87 g ⇒ A theoretical yield

\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{6.29}{7.87}\times 100\5=79.9\%

3 0
3 years ago
The variables for part 1 of this experiment include the types of materials, used in the cup, the masses of these materials and t
iVinArrow [24]
So, first off let’s look at what an independent and dependent variable is.

an independent variable doesn’t change when other variables change, therefore making it alone and independent.

a dependent variable changes based on other variables.

so, i don’t have enough information on your experiment to know the answer but think to yourself, what is changing over time based on something else changing (dependent variable) or think does this thing stay the same no matter what (independent variable).

hope this helps!
8 0
3 years ago
To cook food, a microwave oven converts electrical energy into ________ energy. A) electromagnetic B) heat C) mechanical D) nucl
Mariana [72]

Answer: Option (B) is the correct answer.

Explanation:

When we heat food in a microwave then the electrical energy of microwave produces microwaves which are also part of electromagnetic spectrum.

These microwaves are absorbed by food and as a result microwaves change into heat energy. Therefore, food becomes hot.

Thus, we can conclude that to cook food, a microwave oven converts electrical energy into heat energy.

7 0
3 years ago
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