Can someone help me with this, I feel so sleepy right now :(

Answer:

record only the maximum and minimum temperatures they are exposed to

Answer:

ur answer would be (A)

Explanation:

Answer: A,B,C

Explanation:

Answer:

a

b

c

Explanation:

edge

Answer:

Explanation:

98 gH

2

​

SO

4

​

contains1 mole of H

2

​

SO

4

​

.

1 mole of H

2

​

SO

4

​

contain=1 mole of sulphur atoms.

∴9.8 g of H

2

​

SO

4

​

contain =0.1 mol of sulphur atom.

Thus, number of sulphur-atoms =n×N

A

​

(in 9.8 g of H

2

​

SO

4

​

)

=0.1×6.023×10

23

=0.6023×10

23

.

Answer:

The lightning rod attracts lightning and is not connected to any other pieces of metal that may harm any electrical circuits.

Explanation:

I hope this helps, I tried my best to explain it quickly for you.

Answer/Explanation:

A lightning rod is a metal rod that is used to dislocate where lighting hits. Lightning is going to hit the closest point that it has been attracted too. So, the lightning rod was invented to attract lighting to something less potentially dangerous. Instead of hitting a building causing fires and collapsing, it takes the bolt so that nothing else has to.

Since the actual value of the atomic radius of platinum  atoms was not given in the problem, I chose 175 pm which gives an error of 18.28%.

The actual atomic radius of platinum atoms is 175 pm

We can see from the question that the measured value of the  atomic radius of platinum  atoms was determined to be 143 pm.

Recall that;

Percent error = Absolute value of (measured value - actual value)/actual value * 100

Since the actual value of the atomic radius was not given, let us take it to be 175 pm for the purpose of this problem

Percent error = Absolute value of (143 - 175)/175 * 100

Percent error = 18.28%

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The percent error of this measured value ; ( D ) approximately 13%

The percent error of a measured value

= [ ( actual value - measured value ) / ( actual value ) ]  * 100

= [ ( 175 pm - 143 pm ) / ( 175 pm ) ]  * 100

=  18.29%

From the options given the closest value to the calculated value is 13%

Hence we can conclude that the percent error of this measured value is approximately 13%.

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Although some data related to the question is missing the actual value of the atomic radius of platinum is 175 pm

Answer:

Explanation:

We shall use gas law as follows

P₁ V₁ / T₁  = P₂ V₂ / T₂

5 ) V₁ = 20 , P₁ = 88.89 , T₁ = 273+ 67 = 340 K .

V₂ = 12 , P₂ = ? , T₂ = 273+ 94 = 367 K .

88.89 x 20 / 340 = P₂ x 12 / 367

P₂ = 159.9 atm .

6 )

V₁ = ? , P₁ = .5  , T₁  = 325 K .

V₂ = 48 , P₂ = 900/760 = 1.184  , T₂ = 320 K .

V₁ x .5 / 325 = 48 x 1.184 / 320

V₁ = 115.44 litres .

7 )  

V₁ = 21 , P₁ = 78 , T₁ = 800 K .

V₂ = ? , P₂ =45 , T₂ = 750 K .

21 x 78 / 800 = V₂ x 45 / 750

V₂ =  34.125 litres  .

8 )

V₁ = 3.9  , P₁ = 5 x 10⁵ Pa , T₁ = 323 K .

V₂ = 2.4 , P₂ =3.03 x 10⁵Pa , T₂ = ? .

3.9 x 5 x 10⁵ / 323 = 2.4 x 3.03 x10⁵ / T₂

T₂ =  120.45 K

=  -152.54⁰C .

9 )

V₁ = ?  , P₁ = 60  , T₁ = 115 K .

V₂ = 25 , P₂ =30 , T₂ = 225.

V₁ x 60 / 115 = 25 x 30 / 225

V₁ = 6.39 litre .

Answer:

series bro. i think bro

Answer:

they are in a parallel

Explanation:

this is because the string is also connected to the other bulbs

Answer:

No.

Explanation:

Compounds are made from different atoms. As an example, CO2 is made from Carbon and Oxygen. All atoms being same would make it a pure element, and not a compound.

PLEASE GIVE BRAINLIEST

False, because the substance is most likely an element.

Atoms are the smallest functional or fundamental unit of any substance.

When two or more than two atoms combine, formation of molecule takes place. That molecule will called compound if two different types of atoms combined to form that, but if same number of atoms combine together then they will form an pure element.

Example of compounds are CO₂, H₂O, etc.

And example of elements are O₂, H₂, etc.

Hence, the given statement if false for the compound.

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Answer:

That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge

Answer: The Charge of Elements

For example, sodium is an element with 11 protons within the nucleus and 11 electrons. Another example of an element is carbon, which has six protons within the nucleus and six electrons. In both cases, these elements have a neutral charge.

Explanation: That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge.

Answer:

have one delocalised electron

Explanation:

The elements which are  present of left side of periodic table have similar chemical properties.

Periodic table is a tabular arrangement of elements wherein elements are arranged according to their atomic numbers. It consists of seven horizontal rows called periods  and eighteen vertical columns called groups .

Elements in the same group have similar chemical properties as they have same number of valence electrons. While, electrons in the same period have different valence electrons as electrons are added to same shell and hence have  a little variation in chemical properties.

It is called periodic as properties repeat after an interval of certain electronic configuration. Elements are divided in four blocks depending on their properties.

Learn more about periodic table ,here:

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#SPJ2

Answer:

Part 1:sodium

rubidium

Part 2: protons neutrons and electrons are all 12

The number of protons is equal to the no. of neutrons from the electronic arrangement of magnesium and the no. of electrons is got from the atomic no. of magnesium

Answer:

A.) A cinder cone vocano

Explanation:

Cinder cone volcanos give off more ash, rather then an explosion, hense the name "cinder cone".

Answer:

Cinder Cone Volcano

Explanation:

Answer: the way root cells reproduce to increase root length

Explanation:

Rudolf Ludwig Carl Virchowas known as the founder of social medicine and also the father of modern pathology.

Virchow posited that all cells are gotten from already existing cells and he used this in his work towards cellular pathology, as it was made clear that diseases takes place at the cellular level. He posited that the cells that are malfunctioning cause diseases.

Based on the above analysis, the image that Tumu would most likely use in his assignment to feature Rudolf Virchow is the way root cells reproduce to increase root length.

Answer:

the way root cells reproduce to increase root length

Explanation:

Answer:

Explanation:5,2 methyle- dhexene

Answer:

Im sorry i though this was a joke i don't know I'm sorry:

[tex]\huge\boxed{Buoyant Force}[/tex]

A body at rest in a fluid is acted upon by a force pushing upward called the buoyant force, which is equal to the weight of the fluid that the body displaces. If the body is completely submerged, the volume of fluid displaced is equal to the volume of the body. That is how we find the Volume of the Irregularly shaped objects.

Archemedes the GREAT GREEK PHYSICIST was in a real problem finding out the formula of how to find the volume of irregular object. After countless failures in finding it, once he was going to get a apparently "BUBBLE BATH", So when he got into the tub the water displaced and got out from the tub resulting in the splash of water. His MIND CLICKED that we could find the volume by submerging the irregular object into the measured water and then substract the displaced water from it. He ran NAKED out of the house because of the happiness saying EUREKA! EUREKA! which literally means "I have found it". Thus this law of Archemedes is also called EUREKA LAW. So to simply remember how to find volume of irregular object keep EUREKA in mind.

[tex]Best Regards,[/tex]

Answer: B. Increase because there will be more resources for the remaining predators

Answer: B

Explanation: YES

Answer:

plants

Explanation:

they are plant cells, happy Thanksgiving :)

Answer: photosynthetic tissues

Explanation: Chloroplasts are present in the cells of all green tissues of plants and algae. Chloroplasts are also found in photosynthetic tissues that do not appear green, such as the brown blades of giant kelp or the red leaves of certain plants.

Answer:

How many moles of oxygen gas are required to make 8.33 moles of carbon dioxide? ... be used to produce 1.99 grams of water. 1.99 mg H2O X. 1mol H2O. 18.0g X ... c. If the reaction produces 5.3 mg of carbon dioxide how many grams of water ... X. 25mol O2. 2mol C8H18. X. 32.0g O2. 1mol O2. = 4.80 x 103g O2. Answer ...

Explanation:

I legitimately think it's 87.3 grams

Answer:

B

Explanation:

Lets see here, Gravity is pulling you down but your body is repelling to gravity. Meaning that gravity is pulling down your weight and the scale is reading it.

Hope this helped!

Answer:

an ion is an element that has different numbers of protons and electrons

Explanation:

An ion is positive when it has more protons than electrons and negative when it has more electrons than ions.

(Hope this was helpful!) :)

Answer:

true pls mark brainiest

Explanation:

Answer:

CO2 I believe

Explanation:

It doesn't have any hydrogen

Answer:

0.74 moles of oxygen are required for combustion

Explanation:

Given data:

Number of moles of oxygen required = ?

Mass of Mg = 35.5 g

Solution:

Chemical equation:

2Mg + O₂         →       2MgO

Number of moles of Mg:

Number of moles = mass/molar mass

Number of moles = 35.5 g/ 24 g/mol

Number of moles = 1.48 mol

Now we will compare the moles of Mg with oxygen.

                  Mg           :         O₂

                   2             :          1

                 1.48           :        1/2×1.48 = 0.74 mol

0.74 moles of oxygen are required for combustion.