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inysia [295]
3 years ago
6

Why do i have white spots on my teeth after brushing?

Chemistry
2 answers:
Ann [662]3 years ago
8 0

Answer:

because the brush on the toothbrush  

Explanation:

is cleaning your teeth and showing that your teeth is white .

can i have brainly

azamat3 years ago
8 0
Fluorosis: Fluorosis can cause white spots due to exposure to excessive fluoride
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Part of molten rock at mid-ocean ridges
erastovalidia [21]

Answer:

Magma

Explanation:

Magma is part of molten rock at mid-ocean ridges.

Hope this helps!

4 0
3 years ago
A block of iron has a mass of 826 g. What is the volume of the block of iron whose density at 25°C is 7.9
LuckyWell [14K]

Answer:

105

Explanation:

Density = mass/volume

therefore volume = mass/density

826/7.9=105 (To three significant figure)

8 0
3 years ago
Which is the BEST evidence that a chemical change has occurred?
MaRussiya [10]

d///////////////////////////////

3 0
4 years ago
A 475 ml sample of a gas was collected at room temperature of 23.5 °C and a pressure of
Molodets [167]

Answer:

The volume when the conditions were altered is 0.5109 L or 510.9 mL

Explanation:

Using the general gas equation,

P1 V1 / T1 = P2 V2 / T2

where;

P1 = 756 mmHg

V1 = 475 ml = 0.475 L

T1 = 23.5°C = 23.5 + 273K = 275.5 K

P2 = 722 mm Hg

T2 = 10°C = 10 + 273 K = 283 K

V2 = ?

Rearranging to make V2 the subject of the formula, we obtain:

V2 = P1 V1 T2 / P2 T1

V2 = 756 * 0.475 * 283 / 722 * 275.5

V2 = 101, 625.3 / 198911

V2 = 0.5109 L or  510.9 mL

3 0
4 years ago
Which of the following species has the greatest
Vikki [24]

Answer:

Cl-

Explanation:

Neutral (Cl) have 7 electron, but Cl- have 8 electron due to gain of 1 electron

4 0
2 years ago
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