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Kobotan [32]
3 years ago
13

Plz help, science, open answer, if you cant help, don't answer.

Chemistry
2 answers:
shtirl [24]3 years ago
7 0

Answer: i know one of them,

Sodium and Lithium

Explanation: hope this helps have an awesome day! :)

just olya [345]3 years ago
7 0
The atomic number of magnesium is 12 so there would be 12 protons and 12 electrons. you would then have to round the atomic mass at the bottom up or down giving you the mass number. subtract the number of protons from the mass number to give you neutrons. there is 12 neutrons
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A sample of gas occupies 280 mL when the pressure is 560.00 mm Hg . If the temperature remains constant , what is the new pressu
vichka [17]

Answer : The new pressure if the volume changes to 560.0 mL is, 280 mmHg

Explanation :

According to the Boyle's, law, the pressure of the gas is inversely proportional to the volume of gas at constant temperature and moles of gas.

P\propto \frac{1}{V}

or,

P_1V_1=P_2V_2

where,

P_1 = initial pressure = 560.00 mmHg

P_2 = final pressure = ?

V_1 = initial volume = 280 mL

V_2 = final volume = 560.0 mL

Now put all the given values in the above formula, we get:

560.00mmHg\times 280 mL=P_2\times 560.0 mL

P_2=280mmHg

Therefore, the new pressure if the volume changes to 560.0 mL is, 280 mmHg

3 0
4 years ago
What factor affects both kinetic energy and gravitational potential energy?
Anna11 [10]

Answer:

The kinetic energy of an object is also measured in joules. Anything that is moving has kinetic energy, but various factors affect how much kinetic energy an object has. The first factor is speed. If two identical objects are moving at different speeds, the faster object has more kinetic energy.  In physics, the kinetic energy  of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

Explanation:

8 0
3 years ago
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Predict: In each "Climate type" box, Highlight the condition you think will lead to the fastest weathering for the given weather
yanalaym [24]

Answer:

Frost Wedging - Hot and dry

Clay Formation - Cold and Wet

Dissolving - Cold, and dry

Explanation:

The frost wedging happen when the climatic condition is hot and dry. The dry weather compensates the heat and the rock wedging happens quickly. For clay formation the weather has to be cold and wet. The cold weather will make the sand indulge with rock particles resulting in the clay formation.

6 0
3 years ago
What is the charge associated with each side of the HBr molecule?
nevsk [136]

Answer:

Partial positive on hydrogen and partial negative charge on oxygen atom

Explanation:

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3 years ago
. Chalk is made of CaCO​ 3​ . How many molecules are in 5 grams of chalk?
iren2701 [21]

Answer:

20.02 grams of chalk.

Explanation:

6 0
3 years ago
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