3 years ago

What does the atomic number represent?

Chemistry

2 answers:

Mrrafil [7]3 years ago

8 0

Answer:

Explanation:

saw5 [17]3 years ago

3 0

C. The number of protons in the atoms nucleus.

You might be interested in

Which of the following fractions can be used in the conversion of 25 m3 to the unit cm3?

zaharov [31]

your answer would be C hope this helps

8 0

3 years ago

The heat of fusion for water is 80. cal/g. How many calories of heat are needed to melt a 35 g ice cube that has a temperature o

HACTEHA [7]

Answer: 2800 calories

Explanation:

Latent heat of fusion is the amount of heat required to convert 1 mole of solid to liquid at atmospheric pressure.

Amount of heat required to fuse 1 gram of water = 80 cal

Mass of ice given = 35 gram

Heat required to fuse 1 g of ice at $0^0C$ = 80 cal

Thus Heat required to fuse 35 g of ice = $\frac{80}{1}\times 35=2800cal$

Thus 2800 calories of energy is required to melt 35 g ice cube

6 0

2 years ago

PLEASE HELP ITS A TESTT!!

Sergio [31]

Answer:

Explanation:

6 0

2 years ago

How much electric energy does a 40 W light bulb use if it is left on for 12 hours?

OlgaM077 [116]

480 hrs of electricity

3 0

2 years ago

(2pts) During the Purification of Lactate Dehydrogenase (LDH) experiment, you will need 50ml of buffer A150. Buffer A150 is 30mM

torisob [31]

Answer:

The answer is " $20 \ mL$ "

Explanation:

Given:

Molarity= number of moles

because it is 1 Liter

$\to \frac{0.03\ moles}{1.5 moles}=0.02\ L= 20 \ mL \ of\ Tris\\\\$

therefore,

it takes 20 mL of Tris.

$\to \frac{0.150 \ moles}{5\ moles} =0.03\ L\\\\$

$= 30 \ mL \ of\ Nacl$

So, take $20 \ mL\ of\ NaCl.$

6 0

2 years ago