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Sonbull [250]
3 years ago
15

Im doing a science fair project and i need to find out what are the constents in my project i have to presnt tomorrow i need hel

p!
Chemistry
1 answer:
lions [1.4K]3 years ago
4 0
The constents would be anythign that stays the same in ever experiment. 

Example:  Growing sunflowers in different liquids 

The constants could be: Type of dirt used to grow each, amount of liquid used to water, and the type of sunflowers grown. 


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What is a human event that can cause an increase in freshwater algae growth ? Please help
coldgirl [10]
Farm water runoff, which causes nitrogen rich fertilizer to be washed into the body of water. The nitrogen feeds the algae bloom.. Hope this helps
8 0
3 years ago
One difference between a chemical reaction and a nuclear reaction is that in a nuclear reaction:
AlladinOne [14]

Answer:

C

Explanation:

A nuclear reaction is one in which 2 atoms combine or an atom divides to give rise to entirely different atoms. This is basically the difference it has with a chemical reaction. In a chemical reaction, only new compounds are formed but not new elements. In the case of a nuclear reaction however, even if new elements are not formed, a different atom would be formed.

4 0
4 years ago
Need help with this.
Jobisdone [24]

Answer:

18.2 g.

Explanation:

You need to first figure out how many moles of nitrogen gas and hydrogen (gas) you have. To do this, use the molar masses of nitrogen gas and hydrogen (gas) on the periodic table. You get the following:

0.535 g. N2 and 1.984 g. H2

Then find out which reactant is the limiting one. In this case, it's N2. The amount of ammonia, then, that would be produced is 2 times the amount of moles of N2. This gives you 1.07 mol, approximately. Then multiply this by the molar mass of ammonia to find your answer of 18.2 g.

5 0
3 years ago
If 4.00 moles of a gas at a pressure of 5.40 atm have a volume of 120 litres, what is the temperature?
xz_007 [3.2K]
Here's how you solve this:

3 0
3 years ago
2k+Cl2=2KCI how many grams of KCl is produced from 8.50 g of K and excess Cl2
ZanzabumX [31]

Answer:

Mass = 16.4 g

Explanation:

Given data:

Mass of K = 8.50 g

Mass of KCl produced = ?

Solution:

Chemical equation:

2K + Cl₂     →    2KCl

Number of moles of K:

Number of moles = mass/ molar mass

Number of moles = 8.50 g/ 39 g/mol

Number of moles = 0.22 mol

Now we will compare the moles of potassium and potassium chloride.

                  K         :        KCl

                  2         :          2

                0.22      :        0.22

Mass  of KCl:

Mass = number of moles × molar mass

Mass = 0.22 mol × 74.55 g/mol

Mass = 16.4 g

4 0
3 years ago
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