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Setler79 [48]
3 years ago
13

What can we learn about past climate changes from ice cores?

Chemistry
1 answer:
Mice21 [21]3 years ago
6 0
Fossil fuels about into Earth ice age time
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Is a 15 year old sophomore considered part of the labor force? Why or why not?
Aneli [31]
What do you mean about labor source
6 0
3 years ago
A mixture of coarse sand and sugar is 45.0 percent sand by mass. 120.0 grams (g) of the mixture is placed in a fine-mesh cloth b
8090 [49]

Answer:

Option E

Explanation:

From the question we are told that:

Amount of sand in percentage s_p=45%

Sample sizen=120g

Note:After being dumped in the river repeatedly the sugar melts away leaving behind the insoluble sand

Generally the equation for Amount of sand content is mathematically given by

 X=n*s_p

 X=120*\frac{45}{100}

 X=54g

Therefore

After drying, the mass of the contents of the bag equals

 X=54g

Option E

8 0
3 years ago
What sound is produced when lithium react with water?
Arisa [49]

Answer:

lithium reacts with water, forming lithium hydroxide and highly flammable hydrogen

5 0
3 years ago
Give the group number and general electron configuration of an element with each electron-dot symbol:
MatroZZZ [7]

The group number of (a) is VA(15) and electronic configuration is 1s2 2s2 2p3 . the group number of (b) is IVA(14) and the electronic configuration is 1s2 2s2 2p2 .

What is electronic configuration ?

it shows the distribution of electrons in the atomic orbitals .  

it follows a standard notation of s, p, d, f atomic orbitals in which electronic distribution of an atom occurs .

it has standard notation method as well as condensed electron configuration .

it is useful in determining the valency of an element .

it is useful in predicting the properties of a group of elements .

<h3>What is condensed electron configuration ?</h3>

It contains the symbol of the nearest , smaller noble gas in the square brackets and then the symbols of the occupied orbitals which contains valance electrons .

Example of condensed electron configuration is given by ,

in case of iron the electronic configuration is 1s2 2s2 2p6 3s2 4s2 3d6 .

Thus , the condensed electron configuration of iron is [Ar] 3d6 4s2 .

Learn more about electronic configuration here :

brainly.com/question/50903246

#SPJ4

4 0
11 months ago
What is the weight of a 30.0 kg object?<br> 3.0 N<br> 300 N<br> 6.8 N<br> 132 N
andreyandreev [35.5K]

Explanation:

w \:  = mg \\  = 30\:kg \times 10\:ms^{-2}\\=300\:kg\:ms^{-2}  \\  = 300\:N

6 0
3 years ago
Read 2 more answers
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