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3 years ago

Please help What is an element

Chemistry

2 answers:

Vitek1552 [10]3 years ago

7 0

Protons and electrons and others

Sav [38]3 years ago

4 0

Answer:

An element is atoms with the same number of protons.

Explanation:

Protons, electrons, and neutrons.

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How much energy does an electric hair dryer use if it draws 8.3 amps of current when using 120 volts for 5.0 minutes?

nalin [4]

0.083kwh is the answer your welcome

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2 years ago

Read 2 more answers

at atmoshperic pressure, a balloon contains 2.00L of nitrogen of gas. How would the volume change if the Kelvin temperature were

Nataly [62]

<u>Answer:</u> The percent change in volume will be 25 %

<u>Explanation:</u>

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=2L\\T_1=T_1\\V_2=?\\T_2=75\% \text{ of }T_1=0.75\times T_1$

Putting values in above equation, we get:

$\frac{2L}{T_1}=\frac{V_2}{0.75\times T_1}\\\\V_2=\frac{2\times 0.75\times T_1}{T_1}=1.5L$

Percent change of volume = $\frac{\text{Change in volume}}{\text{Initial volume}}\times 100$

Percent change of volume = $\frac{(2-1.5)}{2}\times 100=25\%$

Hence, the percent change in volume will be 25 %

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2 years ago

What do you call all water on earth surface

kap26 [50]

Answer:

Hydrosphere

Explanation:

Hydrosphere includes all water on the surface of the planet.

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2 years ago

Use a word equation to describe the chemical reaction that takes place when an

lana66690 [7]

Answer: One of the most common iron oxides is iron (III) oxide, known as rust. The chemical formula for rust is Fe2O3. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe

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2 years ago

I need help on #'s 4 and 5

kompoz [17]

The answer for four is frequency.

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3 years ago