Which element is in the same group as carbon?

look at the attached photo

Answer:

moon obviously

Explanation:

........

Answer:

40.06 amu.

Explanation:

From the question given above, the following data were obtained:

Isotope A (K-39)

Mass of A = 39 amu

Abundance of A = 23%

Isotope B (K-40)

Mass of B = 40 amu

Abundance of B = 48%

Isotope C (K-41)

Mass of C = 41 amu

Abundance of C = 100 – (23 + 48)

Abundance of C = 100 – 71

Abundance of C = 29%

Average mass =?

Average mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(39 × 23)/100] + [(40 × 48)/100] + [(41 × 29)/100]

= 8.97 + 19.2 + 11.89

= 40.06 amu

Thus, the average mass of potassium is 40.06 amu

Answer:

natural flame,oxidising flame

Answer:

We use radio waves for communicating or a for television and radio. We use Heat waves to heat things. We uses heat waves everyday for heat up food in the microwave and drying clothing when using the dryer or when drying our hair with a hairdryer. Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.

Hopefully, it helps :) Give me brainiest please!

Answer:

Answer: everything except E

Explanation: There was no dramatic change in temperature and i just took the assignment.

According to the law of conservation of matter, matter cannot be created not be destroyed. In this experiment, no matter loss will occur but there will be rapid evolution hydrogen gas and the balloon will expand.

According to conservation of matter, matter can neither be created nor be destroyed but its state and properties can be changed. The total mass of the reactants will be equal to the total mass of the products.

Magnesium is a second group element and is a metal. Metal reacts with  hydrogen halides to form metal halides and hydrogen gas as the reaction written below:

[tex]Mg +2 HCl \rightarrow MgCl_{2} +H_{2}[/tex]

The evolved hydrogen gas in this reaction tries to diffuses out the sealing and thus the balloon cover expands.  And thus the solid magnesium metal disappears to form magnesium chloride.

The evolution of gases is exothermic and therefore,  the temperature outside increases suddenly.  There we can see bubbles of hydrogen  in the reaction system.

Therefore, the changes that occur in the experiments are, rapid evolution of gases, solid metal disappears, sealing cover expands and there occur a rapid change in temperature. Thus options A,C,D,E are correct.

To learn more about of conservation of matter, refer the link below:

https://brainly.com/question/11573747

#SPJ5

Answer:

Laboratory safety rules are important because there can be many dangerous chemicals in a lab.  Safety rules help people stay safe when they are in close contact with these chemicals.  Over the past few years, lab safety rules have prevented many deaths.  It's important to follow these rules because you could get seriously injured if you don't.

Hope that helps!  Good luck!  :)

Answer:

5.4

Explanation:

V1=5.0

T1=25+ 273=298

V2= z(unknown)

T2=5+273=278

V1/T1 =V2/T2

V2=V1T2/T1

=5*298/278

=5.4

Answer:

The correct answer is - due to the movement of plates it is relocated.

Explanation:

Antarctica is a very cold part of the earth, it is so cold that there is no growth of trees or such vegetation. Even though there are no or less vegetation scientists found fossils of the trees.

It is relocated from the north where the conditions were warmer and easy for tree growth. It is then moved due to plate movements to the south pole. This is the reason behind the fossils scientist found.

The pair of elements which will form covalent bonds with each other are Si (Silicon) and N (Nitrogen). Hence the correct option is (B).

A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.

These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

Silicon and nitrogen forms strong covalent bond . This stable covalently bonded material does not readily sinter and cannot be heated over 1850⁰C as it dissociates into silicon and nitrogen.

Therefore, The pair of elements which will form covalent bonds with each other are Si (Silicon) and N (Nitrogen). Hence the correct option is (B).

Learn more about Covalent Bond here ;

https://brainly.com/question/19382448

#SPJ2

Answer:

400x

Explanation:

magnification=magnification of objective lens*magnification of eyepiece lens

m=40*10

m=400x

Answer:

factor

Explanation:

Answer:

something pushes or pulls it to a stop.

Answer:

global wind patterns. the rotation of the Earth. the shape of the ocean basins.

Explanation:

Explanation:

I Would Determine Mass,Volume And Weight

Answer:

[;

Explanation:

Mudflows (geosphere) and flooding may occur downstream from volcanoes and may inundate streamside communities (biosphere).

Answer:

we need to see the diagram

Explanation:

Answer:

There's no graph attached to the question

Answer:

change in color or state of matter

Explanation:

hope i helped! ❤❤

Answer:

The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.

Answer:

kkkwkisa

Explanation:

wulaoaiq8qiIq8qiaik

The best way for helping the earth water supply that should be last for future generations should be considered option b. where it decrease the residential water usage.

The average American family should be used for more than 300 gallons of the water per day at home. Approximately 70% of the use should arise indoors,

Moreover, outdoor water should be accounted for 30% of household that should be high in drier parts for the country and it should be more water intensive landscape.

Therefore, the option b is correct.

Learn more about water here: https://brainly.com/question/20229458

Explanation:

1 mol of an atom (irregardless of the element) contains the Avogadro's number of atoms. This is given as;

1 mol = 6.022 * 10^23 atoms

For a neutral atom;

NUmber of protons = Number of electrons

The relationship between proton and neutron is given as;

Mass Number = Protons + Neutrons

Ag-108

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 47

Electrons = 47

Neutrons = Mass Number - Protons = 108 - 47 = 61

Pt-195

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 78

Electrons = 78

Neutrons = Mass Number - Protons = 195 - 78 = 117

Explanation:

intrusive rocks.....

.

Answer:

A:petal

B:pistil

C:stamen

Explanation:got it right on edu 2021

Answer:

C

A

B

Explanation: on ED about Identifying Earth’s Layers

Answer:

A number is right I think

Answer:

A.

beryllium fluoride

I hope it is helpful...

Answer:

That atom will not contain any charge because one negative charge of single electron and one positive charge of single proton are neutralized by each other.

Answer:

166,600J

Explanation:

Kinetic energy (K.E), which is the energy due to motion of a body, can be calculated by using the formula;

K.E = 1/2 × m × v²

Where;

K.E = kinetic energy (joules)

m = mass of body (kg)

v = speed or velocity (m/s)

According to this question, the mass of the roller coaster is 833.0 kg while its velocity/speed is 20.0m/s.

K.E = 1/2 × 833 × 20²

K.E = 1/2 × 833 × 400

K.E = 1/2 × 333200

K.E = 166,600

Therefore, the kinetic energy of the roller coaster car is 166,600J.

Answer:

a

Explanation:

Answer: It would be A and C

Explanation: I did the test and got it right. Hope this helps!

Answer:

A + C

Explanation:

ur an amazing person have a great day :3

quote for today : ~dont trust anyone to much remeber the devil was once angle

Answer:

A

Explanation:

Answer:

eyes

Explanation:

It is because the mouth, large intestine and stomach comes in the digestive system abd eyes doesn't.

HOPE THIS HELPS