help! science what usually has the greasiest density 1. plasma 2. liquid 3. gas 4. solid

Answer: Matter

Biosphere

Explanation:

The substance that occupies space and mass is called matter, and the biosphere is the part of the earth that includes life. Thus, the correct options are 1. c and 2. b.

A matter has been defined as a substance that is made of atoms and has a mass that results in it occupying some space. The matter can be in the form of liquid, solids, or gas. The matter is present everywhere and can be interconnected. Thus, 1. c is correct.

The biosphere is defined as the sphere that combinedly comprises the hydrosphere, lithosphere, and atmosphere and is the part where life exists on the earth. It includes the elements air, water, land, etc., and all the ecosystems that range from oceans to mountains. Thus, 2. b is correct.

Therefore, options 1. c. matter and 2. b. the biosphere is correct.

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Your question is incomplete, but most probably your full question was,

1. Anything that has mass and takes up space

2. The part of the earth in which life exists including land water and air

Answer:

Most steps were skipped they couldn't predict what it would be they couldn't really observe I font think they used very many.

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.

Answer:

The correct option is;

D. Calcium chloride breaks into 3 ions, while sodium chloride only breaks into 2 ions

Explanation:

To help melt the ice on icy streets, calcium chloride (CaCl₂) is a more preferred salt type to sodium chloride (NaCl) as when it dissociates into ions in the ice, it forms three ions: a calcium ion, Ca²⁺, and two chloride ions, 2 Cl⁻, while sodium chloride forms two ions: one sodium ion, Na⁺, and one chloride ion, Cl⁻

According to the freezing point depression equation, we have;

ΔT = [tex]K_f[/tex] × m × i

Where;

ΔT = Change in freezing point temperature

[tex]K_f[/tex] = The freezing point depression constant

m = The solution's molality

i = van't Hoff factor

The calcium chloride salt will cause the most depression because the van't Hoff factor is 3 for calcium chloride and 2 for sodium chloride.

Answer:

d im pretty sure i got the same answer

Explanation:

Answer:

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

Answer:

55. I hope this helps you!

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Inside the stomach, Hydrochloric acid kills micro-organisms in the food. Stomach juices begin to break down proteins to amino acids.

✤ So, Fill the blank with proteins.

━━━━━━━━━━━━━━━━━━━━

Answer:they are not the same because the composition differ

Explanation:

Explanation:

To change from m to cm, divide by 100

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

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

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

Answer:

D. Physical Change

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:

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:

4.76 × 10¯⁵ cm

Explanation:

The conversion of 476 nm to cm can be obtained as follow:

1. Conversion of 476 nm to m

Recall

1 nm = 1 × 10¯⁹ m

Therefore,

476 nm = 476 × 1 × 10¯⁹ = 476 × 10¯⁹ m

2. Conversion of 476 × 10¯⁹ m to cm

Recall:

1 m = 100 cm

Therefore,

476 × 10¯⁹ m = 476 × 10¯⁹ × 100

476 × 10¯⁹ m = 476 × 10¯⁷ cm

476 × 10¯⁹ m = 4.76 × 10¯⁵ cm

Therefore,

476 nm is equivalent to the 4.76 × 10¯⁵ cm

Answer:

its answer this question q1

Answer:

Explanation:

reaction A is an acid base reaction

here MgO  is base and H2SO4  is an acid

reaction B is an acid base reaction

here CO3^-² is  weak base and H+ is an acid

reaction D is an acid base reaction water is amphoteric in nature here it behave like base and HCL is an acid

reaction F is acid base reaction

here NH3 is an base  and HCL  is an acid

reaction G is acid base reaction

here NaOH is base and HCL is an acid

in reaction c and e Al is hard acid and Cu is soft acid and HCL is acid and Zn is base but i m not confirmed that these reactions are acid base or not

Answer:

Explanation:

distance =50m = 0.0311 mile

Time= 21.93 seconds/3600 =0.00609 hour

Speed=?

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

Answer:

LiH

A is lithium

group 1 or 7

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.

Answer:

0.0043

0.004 if to one significant figure

0 to one decimal place.

Answer: 5184.000 seconds

Explanation:

If there are 30 days per month then we are trying to find how many seconds the clock will gain in 180 days (30*6). If the clock gains 0.020 seconds per minute, then it gains 28.800 seconds per day (0.020*60*24). We can then multiply this by 180 days to get 5184.000 seconds.

i) 2KClO3 → 2KCL + 3O2

ii) HNO3 + NaHCO3 → H20 + CO2

iii) 2Na + 2H2O → 2NaOH + H2

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:

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:

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.

yes

Explanation

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

Hope this answer correct :)

The question is incomplete, so the complete question is as follows:

"The mixture is green in color.” This confirms that the mixture is a.

A) suspension B) solution C) colloid D) this proves nothing

Answer:

D) this proves nothing

Explanation:

The green-colored mixture does not prove anything about the mixture because only the color of mixture can not decide the typw of mixture.

Several other properties affecting the type of mixture are the size of particles and also dispersion of particles in the solution.

Hence, the correct answer is "D",