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OleMash [197]
3 years ago
15

What makes scientists think that arctic areas were once warm?

Chemistry
1 answer:
kogti [31]3 years ago
3 0

Answer:well the ice preserves the wooly mammoths

Explanation:its not just snow its bacteria witch means that once living to frozen thats how they know how it looks like and to see what animal its related to now day it related to the elephants

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Which of the following factors would reduce the yield of a reaction?
NikAS [45]

The products being more stable than the reactants is the factor which would reduce the yield of a reaction and is denoted as option B under standard conditions.

<h3>What is a Chemical reaction?</h3>

This is the process in which one or more substances which are referred to as reactants are converted into new substances which we call the products.

A chemical reaction involves atoms exhibiting different bond formation so as to ensure they acquire an octet configuration and promotes proper stability of the products.

When the products are more stable than the reactants it means it is unable to form other products thereby decreasing the yield which is why it was chosen as the most appropriate choice.

Read more about Chemical reaction here brainly.com/question/11231920

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3 0
2 years ago
An example of an extensive property of matter is?<br>temp<br>pressure<br>mass<br>hardness
Gelneren [198K]
I believe the answer is mass :) 
7 0
3 years ago
Express250,000ml in liters
frutty [35]

Answer:

250,000 ML is equal to 250 Liters.

Explanation:

The term 'Mili' multiplies the term 'Liter' by 1,000. Per every liter is 1000 milliliters.

7 0
3 years ago
The buffer is prepared by adding 250mL of 0.80M NH3 to 150mL of 0.50M NH4NO3. What is the pH of the final solution (Kb for NH3 =
madam [21]

The pH of the solution is obtained to be 9.67.

<h3>What is a buffer?</h3>

A buffer is a solution that serves to militate against changes in acidity or alkalinity. The buffer is often made of a solution of a strong acid and its salt or a weak base and its salt.

Now we have the that;

Number of moles of base = 250 /1000 *  0.80 = 0.2 moles

Number of moles of salt = 150/1000 *  0.50 = 0.075 moles

Total volume of the solution = 250 + 150 = 400 mL or 0.4 L

Molarity of the base = 0.2 moles/0.4 L = 0.5 M

Molarity of the salt =  0.075 moles/ 0.4 L = 0.1875 M

pKb = - log( 1.8 x 10^-5) = 4.74

pOH = pKb + log [salt/base]

pOH =  4.74 + log (0.1875/ 0.5)

pOH = 4.33

pH = 14 - 4.33

pH = 9.67

The pH of the solution is obtained to be 9.67.

Learn more about pH:brainly.com/question/15289741

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6 0
2 years ago
the density of silver is 10,5 g/cm^3. what is the mass (in kilograms) of a cube of silver that measure .44 m on each side
GREYUIT [131]

Explanation:

First lets calculate the volume of the silver cube The length of a side = 0.62 m Volume

5 0
3 years ago
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