Write a full equation for the reactions between magnesium and sulfuric acid

Answer:

11.007

Explanation:

that is the answer

Answer:

As humans, we have melanin in our hair but as we grow the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle become a more transparent color. Our hair goes through its natural cycle of dying and regenerating, it’s more likely to grow in as gray after the age of 35. Stress can sometimes speed it up

Explanation:

Answer:

As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows.

Answer:

Dmitri Mendeleev

Explanation:

Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Most of his forecasts proved to be correct

Answer:

Mendeleev periodic table

Explanation:

In 1869, just five years after John Newlands put forward his

Law of Octaves, a Russian chemist called Dmitri Mendeleev

published a periodic table. Mendeleev also arranged the

elements known at the time in order of relative atomic mass

Explanation:

To change from m to cm, divide by 100

[tex] \frac{98.723}{100} \\ = \: 0.98723cm[/tex]

Answer:

True

Explanation:

Ozone protects living organisms from damaging UVB rays

Answer:

A: True

Explanation:

The ozone layer acts as an invisible shield and protects us from harmful ultraviolet (UV) radiation from the sun.

the si unit for time is second

the si unir for length is meter

the si unit for mass is kilogram

the si unit for temperature is kelvin

1: Time: second 2. Length: meter 3. Mass: kilogram 4. Temperature kelvin are the SI units of measurements.

What do you mean by SI unit of measurements?

It is unit of the standard of reference which is chosen to measure any type of physical quantity.

SI Units of Measurements is the system which stands for the international system of unit.

The SI, uses standard symbols, units and abbreviations, developed by the Bureau International.

The SI unit of mass is the kilogram, length is a meter, time is second, temperature is kelvin, electric current is ampere, amount of substance is mole, luminous intensity is candela.

SI unit has a huge amount of application  universally in both technical and scientific research to avoid the confusion.

This system is important as  it helps the entire world to understand the measurements in one set of unit systems.

Learn more about SI unit, here:

https://brainly.com/question/12750330

#SPJ2

Answer:

Japanese is educated place so they invent those things which are really good and helpful...

in my opinion it is safe....

i) 2KClO3 → 2KCL + 3O2

ii) HNO3 + NaHCO3 → H20 + CO2

iii) 2Na + 2H2O → 2NaOH + H2

Answer:

Bubbling/Foaming

Heat is produced

Explanation:

A chemical reaction has occurred if

1. There is a change in colour

2. Formation of a precipitate

3. Formation of a gas

4. Change in temperature

5. Change of smell

In the reaction of hydrogen peroxide and potassium iodide, the solution quickly rises which shows the formation of gas. This means it is a chemical reaction.

The beaker/test tube/whatever you used should also become warm because it is an exothermic reaction. This means its a chemical reaction

Answer:

Explanation:

2.2 pounds = 1 kg

495 pounds = x

2.2/495 = 1/x               Cross multiply

2.2*x = 495 * 1             Divide by 2.2

2.2x/2.2 = 495/2.2

x = 225 kg

5,7 g/cm³

d = m/V

= 75.5g/13.25cm³

≈ 5,7 g/cm³

Answer:

At the molecular level, the plasma only lets us see ions and electrons released.

Explanation:

Plasma is the fourth state of matter.

A state similar to gas, but with the difference that it does not have an electromagnetic equilibrium. It also has no defined mass or volume unless it is placed in a closed container.

Water in solid-state: A mesh style is seen where its components obtain more attraction force.

But on the other hand, in the plasma something well defined is not seen, since due to the high temperature its molecules give off electrons, leaving only ions and electrons around.

Answer:

The correct answer is option c, that is, osmotic pressure.

Explanation:

The development of the force, which takes place when two solutions exhibiting distinct solute concentrations are distinguished by a semipermeable membrane is known as osmotic pressure. It is the least pressure that is required to be imparted to a solution to inhibit the inward pure solvent flow through a semipermeable membrane.  

The flow of solvent molecules via a semipermeable membrane to a region of high solute concentration from a region of low solute concentration, until attainment of equilibrium, is done is termed as osmosis.  

Answer: Volume iron = 2 x 3 x 2 => 12 cm³

Mass = 94 g

D = m / V

D = 94 / 12

D = 7.833 g/cm³

Explanation:

Answer:

D. Physical Change

Answer:

Explanation:

distance =50m = 0.0311 mile

Time= 21.93 seconds/3600 =0.00609 hour

Speed=?

Answer:

Atomic mass is the mass of an atom and is given in a.m.u. (atomic mass unit).

Explanation:

Atomic mass is the mass of an atom and is given in a.m.u. (atomic mass unit). However, a molar mass is the mass of one mole atoms or molecules and is given in grams.  Sodium atom has a mass of 23 a.m.u. however, the molar mass of sodium is 23g/mol.

Answer:

Explanation:

This problem tests our knowledge/understanding of the electro-chemical series.

Electrochemical series or activity series is a list that describes the arrangement of elements in order of their increasing electrode potential values.

In the electro-chemical series metals placed above can displace metals below from their salt solutions.

In this question given the series as  stated

1. Fe2+

2.Ag+

3.Zn2+

4.Al3+  

In the series we have metals stated as Zn>Fe>Cu>Ag.

Cu will displace silver Ag+  because it is below it in the series

Answer:

She gave them bottles with labels showing the brands

Explanation:

the teens could have been biased due to knowing the brand. It would have been more reliable if the label was covered or removed.

yes

Explanation

it is using the sun energy as an energy resource and is therefore Eco friendly

Hope this answer correct :)

Answer:

84.1 Kilograms

Explanation:

chemical potential energy, thermal energy, electrical energy, sound energy

Explanation:

the coal is chemical potential energy because it is just sitting there, the coal fueled power plant is thermal energy because it is using the heat from the coal to work the power plant, that is then turned into electrical energy, which then goes to the radio which displays sound energy

Answer:

What letter on the graph corresponds to both liquid water and steam? D

Explanation:

Liquid water exists between 0 and IOO degrees Celcius.

Answer:

b

Explanation: i did the quiz

Answer:

Explanation:i’m not sure.

Answer:

A Law

Explanation:

A scientific law talks about a law which has been observed and found to be always true but does not explain the reason behind it or the underlying causes which makes such an event to occur.

For example the law of conservation of energy states that energy can neither be created or destroyed, but can be converted from one form to another or transferred from one object to another.

In this law there is no reason why this happens and doesn’t state the causative factors.

Answer:

5+ 45 = 50 is the answer....

Answer:

55. I hope this helps you!

Answer:

A*D²/C² = 0.347

Explanation:

A*B² = 1.8*10⁻⁷----- (1)

making A subject of formula; A = 1.8 * 10⁻⁷/B² ----(2)

C* B/D = 7.2*10⁻⁴ ----(3)

making C subject of formula; C = D * 7.2*10⁻⁴/B ----(4)

substituting the values of A and C in the equation A*D²/C²

A*D²/C² = (D² * 1.8 * 10⁻⁷/B²)/(D * 7.2*10⁻⁴/B)²

A*D²/C² = (D² * 1.8 * 10⁻⁷/B²)/(D² * 5.184*10⁻⁷/B²)

A*D²/C² = D² * 1.8 * 10⁻⁷/B² * B²/D² * 5.184*10⁻⁷

A*D²/C² = 1.8 * 10⁻⁷/5.184*10⁻⁷

A*D²/C² = 0.347