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Softa [21]
3 years ago
6

A student is testing water to know which is best for cleansing purposes with soaps. He would find that the cleansing action of s

oaps is best when he uses water obtained from
A. Rain
B. Tap
C. Hand pump
D. Pond
Chemistry
1 answer:
8_murik_8 [283]3 years ago
6 0
The answer is rain water because it is distilled and distilled water is best for this process
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Na+H2O=NaOH+H2<br> Balancing
elena55 [62]

Answer:

Hey mate, here is your answer. Hope it helps you.

Explanation:

The balanced equation is 2Na+2H2O———-> 2NaOH +H2.

6 0
3 years ago
Clearly distinguish between science and technology​
tia_tia [17]

Answer:

The words science and technology can and often are used interchangeably. But the goal of science is the pursuit of knowledge for its own sake while the goal of technology is to create products that solve problems and improve human life. Simply put, technology is the practical application of science.

Explanation:

Check the following images

Hope it helps!!!

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3 0
3 years ago
What happens to excess heat produced in the muscle during contraction and relaxation
Afina-wow [57]

Answer:

Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.

Explanation:

Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.

3 0
2 years ago
What is the volume of 220 grams of an object with a density of 55g/cm square
AnnyKZ [126]
I'm assuming that you meant 55 g/cm^3. Density=\frac{Mass}{Volume}. This is the definition of density. If you rearrange this equation by multiplying each side of the equation by the volume, you get: (Density)(Volume)=Mass. Divide each side by the density to get: Volume=Mass/Density. Now just plug everything in:
V=220 (grams)/55 (grams/cm^3)=<u>4 cm^3</u>
4 0
3 years ago
How many grams of sodium Phosphate is needed to prepare 5.0 L of a 2.6M solution ?
Diano4ka-milaya [45]

Molarity is the ratio of the moles and the volume. The mass of 2.6 M sodium phosphate solution is 2131.22 gms.

<h3>What is mass?</h3>

Mass is the product of the moles and the molar mass of the substance. It is given as,

Mass = Moles × Molar mass

The moles from molar concentration is used to calculate mass as:

Mass = Molarity × volume × molar mass

= 2.6 × 5.0 × 163.94

= 2131.22 gms

Therefore, 2131.22 gms is the mass of sodium phosphate.

Learn more about mass here:

brainly.com/question/9829994

#SPJ1

6 0
2 years ago
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