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SVETLANKA909090 [29]
4 years ago
7

Why is oiling done time and again in a sewing machine???????​

Chemistry
1 answer:
8_murik_8 [283]4 years ago
8 0
If you are looking for a simpler maintenance timeline, oil your machine once after every fifty hours of use, or at the same time you can clean out the lint that may have built up in the machine various books and crannies.
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Why do doctors worry more about a fever of a couple of degrees Celsius than a fever of a couple of degrees Fahrenheit
weeeeeb [17]
Because Celcius is a larger amount than Fahrenheit. The units are farther apart.
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4 years ago
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Find the pH of HCl with a concentration of 0.00006M<br> Round to the nearest whole number
Tpy6a [65]

Answer:

4.22

Explanation:

pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes hydrogen.

pH helps to find the acidity or alkalinity of an aqueous solution.

The number of hydrogen ions (protons) present in a solution is determined by the pH scale.

A pH greater than 7 makes the water more alkaline and a pH less than 7 makes the water more acidic.

pH=-\log [H^+]=-\log [0.00006]=4.22

4 0
3 years ago
If the atomic number of an element is 6 and its mass number is 15, how many neutrons are in the atom's nucleus?
lozanna [386]

Atomic Number is the same as the number of protons in an element.
Mass Number is the number of Protons + Neutrons in an element.

Atomic Number: 6 means 6 Protons
Mass Number: 15 means 15 atoms that are a proton/neutron.
We are given out of the 15 atoms, 6 of them are protons, so the other 9 must be Neutrons.

15 - 6 = 9 so there must be 9 Neutrons.

There are 9 Neutrons in atom's nucleus.

Give Brainiest if you think this is the best answer and explanation. Thanks!

6 0
4 years ago
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Is lithium ionization energy high low or medium?
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Which determines the chemical properties of minerals?
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The chemical makeup found on the periodic table.
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