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☆☆☆☆☆On most push/pull stoppers the knob part that you pull on unscrews from the stopper, and under that is a slot for a screwdriver tighten or remove the stopper. On stoppers with non-removable knobs, there is a screw (usually phillips) under the stopper which can be accessed with the stopper in the up position and unscrewed to remove the stopper.
A 50 ml solution that is 10% acid will consist of 5 ml of acid (10% of the volume) and 45 ml of water (90% of the volume). You're not adding any water, but you want to add enough acid to make a solution that is 50% acid and 50% water. You will need to have a total of 45 ml of acid in the mixture to make it a 50/50 solution, since the amount of water is also 45 ml. You have 5 ml in there already, so you would need to add 40 ml of acid. That would make a total 90 ml solution that is 50% water (45 ml) and 50% acid (45 ml).
You can use a triple beam balance or an electronic balance.
What cleaning product will remove rust stains best
The interactions of its atoms with light.
Only a small fraction of lapis lazuli stones could be made into pigment
An atom with six protons in the nucleus is a carbon element.
No. Neutral atoms of each element, including hydrogen, have a unique number of electrons, which is equal to the number of protons in their nuclei. The number of protons is the element's atomic number on the periodic table.
It is opaque (you cannot see through it)
Atoms 1 and 2................
A+
11.00g
Using weighing paper to measure solids
I would use a graduated cylinder to measure out 50 mL of water.
Graduated Cylinder <--------------------
the ratio of mass to charge for an electron. A+
932 milliliters is 0.932 liters.
after zeroing the balance and placing an empty weighing paper on it
Safety equipment
Only when your teacher tells you to (A+)
The bottom of the meniscus should be halfway between the 5.1-mL mark and the 5.2-mL mark
pour the sample on the weighing paper
Gram is a unit of measure, for mass.
There are so many true statements that listing all of them is not a realistic proposition.
about 1,800 g A+
neutrons A+
