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motikmotik
3 years ago
6

I need this please my brain hurts

Chemistry
1 answer:
GarryVolchara [31]3 years ago
5 0
8.4 grams. I think but I’m not 100% sure
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Someone help me with this rly quick
Masja [62]

Answer:

10500600m/s

1ds=100m/s

5 0
4 years ago
Jerry designed a coat that he thinks could keep people dry during a thunderstorm. He created a prototype that looks just like hi
AlekseyPX

Answer:

The next step is prototype testing

Explanation:

The stages of the design process are;

1) Situation analysis

Paper based research is conducted on the situation to obtain the situation parameters

2) Brief writing

With the situation analysis developed above, the brief of the current situation is put down on paper

3) Problem research

The problem is researched and experimented on with the development of a paper based proof of the possible concept

4) Specification writing

The specifications of the problem are outlined

5) List the possible solutions

The possible solutions are brainstormed and listed

6) Preferred solution selection

The preferred solution is selected based on the constraints in the situation

7) Create working drawing/plan

The working design drawing of the selected solution or concept is completed and evaluated for applicability

8) Building of a prototype

The design is converted into a prototype which is a model of the actual solution

9) Testing of the prototype

The prototype is tested for functionality, for ability to work in the intended situation and/or in the intended system

10) Report writing

A report is made on the outcome of the tests for review before production

Therefore, after the prototype is created, stage 8, the next step is the testing of the prototype stage 9.

5 0
3 years ago
What volume (in L) of oxygen will be required to produce 77.4 L of water vapor in the reaction below?
Nostrana [21]

Answer:

For the production of 77.4 L water 90.3 L oxygen is required.

Explanation:

Given data:

Volume of oxygen required = ?

Volume of water produced = 77.4 L

Solution:

Chemical reaction equation:

2C₂H₆ + 7O₂  →  4CO₂ + 6H₂O

1 mole = 22.414 L

There are 6 moles of water = 6×22.414 = 134.5 L

There are 7 moles of oxygen = 7×22.414 = 156.9 L

Now we will compare the litters of water and oxygen:

                              H₂O           :              O₂    

                              134.5         :              156.9

                                77.4         :             156.9/134.5×77.4 =90.3 L

So for the production of 77.4 L water 90.3 L oxygen is required.

8 0
4 years ago
Help please I am so lost my teacher is no help
uranmaximum [27]

Answer:

B - CALCIUM

Explanation:

Hopes it helps

6 0
3 years ago
A light has a frequency of 6.2 x 1016 Hz. What is the wavelength in meters?
Gemiola [76]

Answer:

λ =  0. 484 × 10⁻⁸ m

Explanation:

Given data:

Frequency = 6.2 × 10¹⁶ Hz

Wavelength = ?

Solution:

Formula:

Wavelength = speed of light / frequency

speed of light = 3 ×10⁸ m/s

λ = c / f

λ = 3 ×10⁸ m/s / 6.2 × 10¹⁶ s⁻¹

λ =  0. 484 × 10⁻⁸ m

7 0
4 years ago
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