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dedylja [7]
3 years ago
11

25 Points Please Help ASAP! Will Mark Brainliest If All Are Answered!!

Chemistry
1 answer:
xz_007 [3.2K]3 years ago
4 0

Answer:

c because it is a group of elements

Explaation:

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Help ASAP I’ll mark you as brainlister
Sav [38]

Answer:

2.51g Mg

Explanation:

The empty crucible had a mass of 35.84. With the magnesium added, it had a mass of 38.45. This means that you should subtract the mass of the empty crucible from the mass of the crucible with Mg to find how much was added.

38.35g - 35.84g = 25.1g

3 0
3 years ago
Describe what happens in a chemical reaction and how it is balanced.
guajiro [1.7K]
Okay okay so so I can just get my hair done before you leave lol I’ll let you know when we are ready to get rueit ready for bed thanks love you bye
4 0
2 years ago
If the specific heat of water is 4. 18 j/g∙°c, how much heat is required to increase the temperature of 1. 20 kg of water from 2
Mkey [24]

The heat required to increase the temperature of 1.20 g of water is  80,256 k/j

<h3>What is specific heat?</h3>

The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

4. 18 J heat is required to change the temperature of 1.20 kg of water from 23. 00 °c to 39. 00 °c.

The heat required to raise temperature is the product of mass, specific heat and temperature change

1,200 × 4.18 × (39 − 23) = 80,256

Thus, the heat required to increase the temperature of 1.20 g of water is  80,256 k/j

Learn more about specific heat

brainly.com/question/11297584

#SPJ4

8 0
2 years ago
When elements form compounds, the elements
kati45 [8]

Answer:

Explanation:Elements form compound to form chemical bonds, chemical bonding occurs because atoms of an element become more stable by losing, gaining and sharing elections....

6 0
3 years ago
9. How many grams are in 2.0 x 105 molecules of carbon monoxide?
timama [110]

Answer: 9.3 x 10^ 18 g CO

Explanation:

Start by knowing that carbon monoxide is the compound CO. To convert molecules to grams, you first need to convert molecules to moles. This can be done using the conversion factor for Avogadro's Number:

(2.0 x 10^5 molecules CO) x 1 mol CO / 6.02 x 10^23 molecules CO

This cancels molecules CO.

Then, you can convert moles to grams, which is your desired quantity. You can find the number of grams for CO by looking at the periodic table and adding together their masses. C = 12 g and O = 16 g. Total of 28 g CO:

(1 mol CO) x 28 g CO / 1 mol CO

This cancels mol CO, which leaves grams CO.

5 0
3 years ago
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