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2 years ago

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All living things share common characteristics. They are made up of cells, they respond to change, reproduce, have DNA, and use

energy. What is one other common characteristic of living things? have fingers grow and develop live less than 200 years breathe air through lungs

1 answer:

navik [9.2K]2 years ago

4 0

Answer:
they do respiration,they need nutrition,excretion occurs,growth and development happen.

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Cells which form pathways to and from the brain are <br> .epiltheilal neurons connnective

nikdorinn [45]

Answer:

<u><em>neurons</em></u>

Explanation:

The long-axoned cells, called principal neurons, transmit information over long distances from one brain region to another (Sheperd,1979). Principal neurons provide the pathways of communication within the nervous system.

3 0

2 years ago

Read 2 more answers

A chemist prepares a solution of silver(I) nitrate by measuring out of silver(I) nitrate into a volumetric flask and filling the

leva [86]

Answer:

3.33 M

Explanation:

It seems your question is incomplete, however, that same fragment has been found somewhere else in the web:

" <em>A chemist prepares a solution of silver nitrate (AgNO3) by measuring out 85.g of silver nitrate into a 150.mL volumetric flask and filling the flask to the mark with water.</em>

<em>Calculate the concentration in mol/L of the chemist's silver nitrate solution. Be sure your answer has the correct number of significant digits.</em> "

In this case, first we <u>calculate the moles of AgNO₃</u>, using its molecular weight:

85.0 g AgNO₃ ÷ 169.87 g/mol = 0.500 mol AgNO₃

Then we<u> convert the 150 mL of the volumetric flask into L</u>:

150 / 1000 = 0.150 L

Finally we <u>divide the moles by the volume</u>:

0.500 mol AgNO₃ / 0.150 L = 3.33 M

4 0

2 years ago

Round to 4 significant figures: 42,561

arsen [322]

6 is the fourth significant figures

if the number behind it is 5 or more then 5, you must add 1 to the number and ALL the number behind it will turn into 0

so that the answer is 42560

7 0

2 years ago

Metals posses varying reduction potentials. Iron can reduce Cu+2 (aq) to copper metal. Silver can reduce Au+ (aq) to gold metal.

natta225 [31]

<u>Answer:</u> The true statement is iron can reduce $Au^+(aq)$ to gold metal

<u>Explanation:</u>

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.

The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series.

$A+BC\rightarrow AC+B$

Metal A is more reactive than metal B.

We are given:

Iron can reduce copper, silver can reduce gold, sodium can reduce iron and copper can reduce silver metal.

The increasing order of reactivity thus follows:

$Au$

where, sodium is most reactive and gold is least reactive

For the given options:

<u>Option 1:</u> Copper cannot easily reduce sodium ion to sodium metal because it is less reactive.

$Cu(s)+Na^+(aq.)\rightarrow \text{ No reaction}$

<u>Option 2:</u> Iron cant easily reduce gold ion to gold metal because it is more reactive.

$Fe(s)+3Au^+(aq.)\rightarrow Fe^{3+}(aq.)+3Au(s)$

<u>Option 3:</u> Silver cannot easily reduce iron ion to iron metal because it is less reactive.

$Ag(s)+Fe^{3+}(aq.)\rightarrow \text{ No reaction}$

Hence, the true statement is iron can reduce $Au^+(aq)$ to gold metal

7 0

2 years ago

A hydrogen-filled balloon was ignited and 2.10 g of hydrogen reacted with 16.8 g of oxygen. How many grams of water vapor were f

stiks02 [169]

Hydrogen + oxygen --> water
2,1g + 16,8g = x
x = 18,9g

5 0

2 years ago