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Leokris [45]
3 years ago
15

Marcel conducts an experiment to test which stain remover works best on mustard stains. He wants to make sure that he

Chemistry
2 answers:
Anni [7]3 years ago
7 0

Answer: Repeat the experiment several times with the same variable and constants.  

Explanation:

The experimental procedure should be performed many times so as to determine the effect of the stain remover on mustard stain in different conditions and while using different variables such as water and type of machine used. This will tell how useful the stain remover in all conditions provided to check the accuracy of the stain remover.

Vladimir [108]3 years ago
6 0

Answer: D. repeat the experiment several times with the same variable and constants

Explanation: Took the test

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The molar mass of hydrogen (H2) is 2.02 g/mol. A sample contains 4.00 mol of H2. What is the mass, in grams, of this sample? 1.9
lianna [129]
I thought I could make you day so here is your Anwser.The mass of a sample containing 4.00 mol of H2 is 8.08 g. The molar mass of hydrogen (H2) is 2.02 g/mol. In other words, there are 2.02 g in 1.00 mol of H2. The question is how many grams are in 4.00 mol of H2. Let's use proportion: 2.02 g : 1.00 mol = x : 4.00 mol. x = 2.02 g * 4.00 mol : 1.00 mol. x = 8.08 mol. Thus, there are 8.08 g of the sample of 4.00 mol of H2.

3 0
3 years ago
Read 2 more answers
C(p) = 1.065(7.50p) + 20.25
tigry1 [53]

Answer:

I think its 639/80

Explanation:

4 0
3 years ago
How many atoms are in 65.05g of Na?​
Artemon [7]

Answer:

grsdg

Explanation:

sadga

7 0
3 years ago
How many moles of water are produced when 24.3 ml of 0.100 m naoh is mixed with 31.4 ml of 0.08 m acetic acid?
slega [8]
<h3><u>Answer;</u></h3>

0.002512 moles of H2O

<h3><u>Explanation</u>;</h3>

The reaction between acetic acid ( CH3COOH) and NaOH is given by the equation;

CH3COOH + NaOH ------> CH3COONa + H2O

Number of moles of CH3COOH = molarity × volume in litres

                                                     = 0.08 × 31.4/1000

                                                     = 2.512 × 10^-3  

Similarly number of moles of NaOH = 1 × 24.3/1000

                                                      = 0.0243

From the reaction the mole ratio of CH3COOH : NaOH

Therefore; 0.0243 moles of NaOH will react with 0.0243 moles of CH3COOH but no.of moles of CH3COOH given in the question are 0.002512  moles, which is less than what is required.

Thus; CH3COOH is the limiting reagent and amount of products produced will depend on amount of CH3COOH only.

Since; 1 mole of CH3COOH gives 1 mole of water.

Then; 0.002512 moles of CH3COOH will give 0.002512 moles of H2O

5 0
3 years ago
3) If an electrical appliance has 150.0 V applied causing a current of 2.34 amps, what is the
eimsori [14]

The resistance of the appliance is 64.1 Ω.

<u>Explanation:</u>

As per the Ohm's law, which states that the electric current is in direct proportion to the voltage and is in inverse proportion to the resistance. It is given by the expression as,

V = IR

Where V is the voltage (V) = 150.0 V

I is the current (amps) = 2.34 amps

R is the resistance (ohm) or Ω = ?

Now we have to rearrange the equation to get the resistance as,

$R = \frac{V}{I}

Now we have to plug in the values as,

$ R = \frac{150}{2.34}

   = 64.1 Ω

So the resistance of the appliance is 64.1 Ω.

4 0
4 years ago
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