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frosja888 [35]
3 years ago
8

Isabel wanted to determine if she could see the flag on the moon. What tool should she use?

Chemistry
1 answer:
coldgirl [10]3 years ago
4 0
A VERY good telescope
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LION<br>If 3.0L of helium at 20°C is allowed to expand to 4.4L, with pressure remain the same​
Artist 52 [7]

Answer:

This question is asking to find the new temperature

The answer for the final temperature is 429.73K

Explanation:

Using Charles law equation as follows:

V1/T1 = V2/T2

Where;

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question;

V1 = 3.0L

V2 = 4.4L

T1 = 20°C = 20 +273 = 293K

T2 = ?

Using V1/T1 = V2/T2

3/293 = 4.4/T2

Cross multiply

293 × 4.4 = 3 × T2

1289.2 = 3T2

T2 = 1289.2 ÷ 3

T2 = 429.73K

8 0
3 years ago
Why+is+it+that+nitrogen+is+often+a+limiting+plant+nutrient,+despite+the+fact+that+the+atmosphere+is+80%+nitrogen+gas+(n2)?
Nataly [62]

Why  is it that nitrogen is often a limiting plant nutrient, despite the fact that the atmosphere is 80% nitrogen gas because plant can not fix nitrogen.

What is nitrogen fixation?

Nitrogen fixation is a chemical process that converts molecular nitrogen (N2) in the air, which has a strong triple covalent bond, into ammonia (NH3) or related nitrogenous chemicals.

With the exception of a few microbes, atmospheric nitrogen is molecular dinitrogen, a largely nonreactive chemical. Diazotrophy, or biological nitrogen fixation, is an important microbially driven process that transforms dinitrogen (N2) gas to ammonia (NH3) via the nitrogenase protein complex.

To learn more about nitrogen fixation click the given link

brainly.com/question/19972090

#SPJ4

7 0
1 year ago
What solid would form when phosphoric acid (H3PO4) is added to milk of magnesia (Mg(OH)2)
lawyer [7]

Answer:

Mg₃(PO₄)₂

Explanation:

This is a neutralization reaction between an acid and a base

The acid here is H₃PO₄

         base is Mg(OH)₂

Every chemical reaction is made up of reactants on the left side and products formed on the right hand side of the expression;

          3Mg(OH)₂_{(s)}  + 2H₃PO₄_{(aq)}   →   Mg₃(PO₄)₂_{(s)}   +    6H₂O_{(l)}

The reaction above is a double replacement reaction in which two ionic compounds gives an insoluble precipitate as a product when their ions displace one another in solution.

The solid formed is Mg₃(PO₄)₂

       

6 0
3 years ago
Urea is a product of digestion of proteins and other foods that contain nitrogen. It can react with water and acid to form ammon
irina [24]

Answer:

The urease will not catalyze any reaction.

Explanation:

The hydrolysis reaction of urea is:

(NH₂)₂CO + 2 H₂O + H⁺ ⇒ 2 NH₄⁺ + HCO₃⁻

Urease is an enzyme that catalyzes the urea hydrolysis reaction. Enzymes are very specific referring to the substrates they catalyze. If the solution does not contain urea, the urease will not bind to any of the substances in the solution, so it will not catalyze any reaction in the solution.

7 0
4 years ago
Read 2 more answers
If a 10-newton force moves an object 2 meters, how much work is done on the object?
Nataliya [291]

Answer:

20 J  

Explanation:

The formula for work (w) done is

w = f × d

w = 10 N × 2 m = 20 N·m = 20 J

The work done is 20 J.

7 0
3 years ago
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