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noname [10]
4 years ago
9

A Saint Bernard and a Chihuahua are of the same species but look very different. It is possible to breed the two and get a puppy

that might look like something else entirely but still be a dog. Why might dogs be of interest to an anthropologist?
Chemistry
1 answer:
iVinArrow [24]4 years ago
7 0

Answer:

Because of the breeds

Explanation:

Like in humans, the dogs belong to the same scientific group, but through the passing of time, there has been some changes in their DNA, slightly differences that make the size, the hair, and another traits to be different.

In humans all the "breeds" suffer the same changes, that is the reason that spite we are homo sapiens, there are different groups of humans as the oriental, Caucasian, etc.

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1. What is the state of matter of each of these materials at room temperature? a) gold b) gasoline c) oxygen d) olive oil e) mer
ehidna [41]

Answer:

a) gold - Solid

b) gasoline - liquid

c) oxygen - gaseous

d) olive oil - liquid

e) mercury (found in thermometers) - liquid

f) aluminum - solid

Explanation:

Matter exists in three states viz: solid, gas and liquid. Note that, room temperature is a neither hot or cold temperature, which is about 20-23°C.

A) Gold is a transition metal with the symbol Au. At a room temperature, Gold, like most metals are found as SOLIDS.

B) Gasoline is a liquid mixture of refined hydrocarbons majorly used as fuels.

C) Oxygen is a chemical element with symbol O. It is a constituent of natural air, which is a mixture of different gases including oxygen. Hence, at room temperature, Oxygen is a gas.

D) Olive oil is a vegetable oil got from olives. It is composed of fats and it's a liquid at room temperature.

E) Mercury is an element with symbol Hg. It is the only metallic element found naturally (at room temperature) as a liquid. It is used in thermometers.

F) Aluminum is another chemical element with symbol Al. It is a lustrous metal that occurs as a Solid in room temperature.

8 0
3 years ago
HELPP ME PLEASE!! What would be the density of a 40 g object that displaces 10 ml of water?
Snezhnost [94]

Answer:

<h2>The answer is 4.0 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 40 g

volume = 10 mL

The density of the object is

density =  \frac{40}{10}  = 4 \\

We have the final answer as

<h3>4.0 g/mL</h3>

Hope this helps you

5 0
3 years ago
Hydrazine (N2H4), a rocket fuel , reacts with oxygen to form nitrogen gas and water vapor. The reaction is represented with the
Serggg [28]

85.33 grams of hydrazine is needed for the reaction.

Rocket fuel contains the reaction between hydrazine and oxygen to break and form nitrogen and water vapour along with steam as it is an exothermic reaction.

<h3>How to calculate the hydrazine amount?</h3>

The reaction can be shown as:

\rm N_{2}H_{4}(l) + O_{2}(g) \rightarrow N_{2}(g) + 2H_{2}O(g)

From the periodic chart, it can be said that:

  • Mass of nitrogen = 14 gm
  • Mass of oxygen = 16 gm
  • Mass of hydrogen = 1 gm

The molar mass of hydrazine will be:

\begin{aligned} \rm Molar \;mass \;of \rm \;N_{2}H_{4}&= 2(14) + 4(1) \\\\&= 32 \;\rm grams\end{aligned}

Mass of water:

\begin{aligned}&= 2(1) + 16 \\\\&= 18 \;\rm grams\end{aligned}

From the reaction, it can be said that,

1 mole of \rm N_{2}H_{4} = 2 moles of \rm H_{2}O

32 grams of \rm N_{2}H_{4}  = ? grams of water

\begin{aligned}\text{Gram of water} &= 18 \times 2\\\\&= 36 \;\rm gm\end{aligned}

So, for 96 gm of water the hydrazine produced will be,

\begin{aligned}\text{mass of }\rm N_{2}H_{4} &= \dfrac{96 \times 32}{36}\\\\&= 85.3334 \;\rm grams \end{aligned}

Therefore, 85.33 grams of hydrazine is needed for the reaction.

Learn more about rocket fuel here:

brainly.com/question/10179270

7 0
2 years ago
To the nearest gram, what is the mass of of one spoonfull of sugar? g
Vaselesa [24]

Answer:

the mass of one spoonful of sugar to nearest gram is 10g

4 0
3 years ago
Kareem wants to dissolve rock salt in a glass of water at
Mars2501 [29]
Add hot water into the glass
5 0
3 years ago
Read 2 more answers
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