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Answer:

2 waves

Explanation:

If Frank creates 20 waves every second then the way you solve is turn it into a proportion 20 waves/10 secs = x/1 sec which then turns into the equation of 10x=20 where x=2 hence Franks creates 2 waves every second.

Answer:

Beryllium has 2 dots and Carbon has 4

Answer:

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Explanation:

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Answer:

Stay in the shade, especially during midday hours.

Wear clothes that cover your arms and legs.

Consider options to protect your children.

Wear a wide brim hat to shade your face, head, ears, and neck.

Wear wraparound sunglasses that block both UVA and UVB rays.

Explanation:

CAN YOU GIVE ME BRAINLIEST

The amount of heat absorbed by the water is 1606.6 J (383.99 Calories )

Initial temperature (T₁) = 21.5 °C

Final temperature (T₂) = 28.1 °C

ΔT = T₂ – T₁

ΔT = 28.1 – 21.5

Mass of water (M) = 58.18 g

Change in temperature (ΔT) = 6.6 °C

Specific heat capacity of water (C) = 4.184 J/gºC

Q = MCΔT

Q = 58.18 × 4.184 × 6.6

Divide by 4.184 to express in Calories

Q = 1606.6 / 4.184

Therefore, the amount of heat absorbed by the water is 1606.6 J (383.99 Calories )

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Answer:

[tex]tin \: sulphar gold \: are \: not \: mixture \: \\ they \: are \: elements \: \: others \: are \: mixture \\ thank \: you[/tex]

Tin, sulfur, and gold are not a mixture because they are pure elements.

Pure substances can be described as elements that cannot be broken down into simple substances because they have only one type of atom in the whole composition.

A pure substance can be described as composed of two or more elements that are chemically combined and have a set composition such kind of pure substance is known as a compound.

A mixture can be described as made up of two or more different substances which are just physically combined but not chemically. A mixture can be separated into its initial components.

The composition of a heterogeneous mixture is non-uniform throughout the mixture while the composition of a homogeneous mixture is always the same in the entire mixture.

Therefore, tin, sulfur, and gold are pure elements, not a mixture.

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Answer:

Milk is naturally a white substance due to the make-up of water and other components including fat and protein that mix together to form tiny particles which reflect light. There is a difference in mammals milk; for example, hippos milk is pink.

Explanation:

ANSWER;

2.914 L

Explanation:

A balloon is filled to a volume of 2.00 L with 3.50 moles of gas at 25

°C. With pressure and temperature held constant, what will be the

volume of the balloon if 1.60 moles of gas are added?

WE HAVE INCREASED THE NUMBER OF PARTICLES THE BALLOON BY

45.7%

ALL OTHER THINGS EQUAL, WE HAVE INCREASED THE VOLUME BY

45.7%

THE NEW VOLUME SHOULD BE 2.00 X 1.457= 2.914 L

Answer:

Viewed simply, electrons are arranged in shells around an atom's nucleus. Electrons closest to the nucleus will have the lowest energy. Electrons further away from the nucleus will have higher energy. ... In a more realistic model, electrons move in atomic orbitals, or subshells.

Explanation:

Viewed simply, electrons are arranged in shells around an atom's nucleus. Electrons closest to the nucleus will have the lowest energy. Electrons further away from the nucleus will have higher energy. ... In a more realistic model, electrons move in atomic orbitals, or subshells.

Answer:

Paper burning

Explanation:

Answer:

When compared to the standard hydrogen electrode, zinc has a reduction potential of -0.762 volts and copper a reduction potential of + 0.342 volts. What is the reduction potential when zinc and copper are connected to one another? Standard Santand Inc ар -40 INC IM IM Z IM ಅವಳ ದdಂಗpa volts 0.420- volts 0.420- volts 0.420- volts 1.104+

Explanation:

Btw brainliest me plss

Answer:

Because its the basic building block of life

Explanation:

Carbon is essential to life since it is present in nearly all molecules in the body. like, sugars, DNA, proteins, lipids, and so on. Except for water though.

Answer:

3−

Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3−.

Explanation:

Answer: There are three main factors that characterize the Bohr model. First, in the Bohr Model, the orbits have a set size and energy. There’s a correlation between energy and size: the smaller the orbit, the less energy it has. Electrons can move from one orbit to another by emitting or absorbing radiation.

Explanation: Hope this helped !

Answer:

Answer:

They both classify as halogens they are both in the fluorine family and their both in group 17 on the periodic table

Explanation:

That's all I could come up with

Answer:

When the sun's rays shine down on a plant, the chlorophyll capture the energy from the sun and use it during photosynthesis to make sugars. Sugar is the energy source for plants, that is why sunlight and photosynthesis is so important

The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas.

Answer:

135 kPa

Explanation:

Answer:

Ca(OH)2 chemical of lime water.

it is alkali in nature if it is only lime then it is an example of critic acid and it is know as. acid

lime wate is alikali

limes is acid

Explanation:

Answer:

Alkali

Explanation:

Limewater is the calcium hydroxide. It is Alkali

b.c10²

i dont know if it is right sorry if isn't

Answer:

[tex]3.7837 \times {10}^{ - 19} j[/tex]

Explanation:

[tex]e = \frac{hc}{ \lambda} \\ where \: h \: = plancks \: constant \\ and \: c = speed \: of \: light[/tex]

Planck constant value: h = [tex]6.62606957 \times {10}^{ - 34} j \: s\: [/tex]

speed of light constant: c = [tex]299,792,458 \frac{m}{ s} [/tex]

[tex]hc = 6.62606957 \times {10}^{ - 34} j \: s\: \: \times \\ 299792458 = 1.98645 \times {10}^{ - 25} j \: m[/tex]

Divide the wavelength in nanometers by 10^9 to calculate the value in meters.

[tex] \frac{525}{ {10}^{9} } = 5.25 \times {10}^{ - 7} m[/tex]

[tex]e = \frac{hc}{ \lambda} \\ = \frac{1.98645 \times {10}^{ - 25} j \: m}{ 5.25 \times {10}^{ - 7} m} [/tex]

[tex] = 3.7837 \times {10}^{ - 19} j[/tex]

Answer:

Lava is hot liquid rock. When lava flows over solid ground, the solid ground beneath it increases in temperature. What happens to the molecules in the solid ground when the temperature is increasing? The energy of the molecules in the ground decreases.

0.75x2.5x328/(0.325x1.5)

=1261.5K

Answer:

po jakiemu to jest XD

Explanation:

po jakiemu to jest XD

Answer: Its B,C,D, and E

Explanation:

The correct statements about the compound calcium chloride are Chlorine becomes a negative ion, The chemical formula is CaCl₂, Calcium transfers electrons to the chlorine atoms and The subscript 2 is used to balance the charge.

Hence, Option B, C, D and E are correct.

Calcium chloride is a crystalline white substance which is soluble in water. It is the chloride salt of calcium. The chemical formula of calcium chloride is CaCl₂. In calcium chloride, Calcium atom has two valence electrons.

Now lets check all statements one by one

Option (A): Calcium chloride is a ionic compound. Here calcium transfers its valence electrons to both chlorine atoms.

So, statement A is incorrect.

Option (B): In calcium chloride each chlorine atom gains 1 electron and we get a negatively charged ion Cl⁻.  

So, statement B is correct.

Option (C): In Calcium chloride the valency of calcium is +2 and the valency of chlorine is -1.  So the chemical formula is CaCl₂.

So, statement C is correct.

Option (D): In calcium chloride calcium transfer its two valence electrons to both the chlorine atoms.

So, statement D is correct.

Option (E): In calcium chloride the subscript 2 is used to balance the charge. The subscript show the number of atoms in compound.  

So, statement E is correct.

Thus, from the above conclusions we can say that The correct statements about the compound calcium chloride are Chlorine becomes a negative ion, The chemical formula is CaCl₂, Calcium transfers electrons to the chlorine atoms and The subscript 2 is used to balance the charge.

Hence, Option B, C, D and E are correct.

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Answer:

5 cm and 50 mm

Explanation:

1 cm = 10 mm

So 5cm = 50 mm

Answer:

the 0.01% of bacteria will reproduce. These new bacteria will have the same genes and communities that allowed their parent bacteria to survive. This shows survival of the fittest, where organisms that are best fit for their environment will survive and reproduce, in the process of evolution.

Explanation:

Answer:

the agriculture sector is an industrial facility that releases nitrous oxide

Explanation:

Answer: Hello!

Agriculture sector. The agriculture sector dominates emissions of N2O: emissions from agricultural soils in 2019 account for 55% of total UK emissions, and other agricultural sources add another 12%.

Explanation:

Feel Free to ask me anything if questions. Mark me brainest please. Hope I helped! Hope you make an 100%

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