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2 years ago

Which of the following lists describes characteristics of a base?

Chemistry

2 answers:

soldi70 [24.7K]2 years ago

5 0

Answer: Bitter taste, high pH, and caustic

Explanation:

Acids are those substances which either donates hydrogen ions $(H^+)$ when dissolved in water. They have pH ranging from 1 to 6.9.They are They are sour in taste. They dissolve metals to give hydrogen gas.Strong acids are caustic as they burn skin.

$HX\rightarrow H^+X^-$

Bases are those substances which either donates hydroxide ions $(OH^-)$ when dissolved in water or donates a pair of electrons. They have pH ranging from 7.1 to 14. They are bitter in taste. They are slippery in nature. Strong bases are caustic as they burn skin.

$BOH\rightarrow B^++OH^-$

suter [353]2 years ago

3 0

Answer:

bitter taste low ph and slipery

Explanation:

if its sour or dissolves metal it is an acid

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Why is radioactive dating important when approximating the age of earth?

Furkat [3]

Answer:

So, we rely on radiometric dating to calculate their ages. Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.

Explanation:

radiometric dating is a very accurate way to date the Earth.We know it is accurate because radiometric dating is based on the radioactive decay of unstable isotopes. When an unstable Uranium (U) isotope decays, it turns into an isotope of the element Lead (Pb).

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A student described two properties of a substance shown below which of the following is true about the two properties described

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Answer:

Explanation:

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Which of the following combinations of particles represents an ion of net charge -1 and of mass number 82? Group of answer choic

noname [10]

Answer:

The correct choice is E (47 neutrons, 35 protons, 36 electrons)

Explanation:

A ion of net charge -1 means that the ion wins an e-.

We dismiss options B and C.

We also dismiss option A because neutrons + protons = 81.

neutrons + protons = mass number

So we have E and C.

We see that C has 47 neutrons, 36 protons and 36 electrons and, as the atomic number matches the number of protons, we find out on the Periodic Table that the atomic number 36 represents to Krypton, a noble gas. It is impossible! A noble gas never can't be a ion of net charge.

Option E is correct, It is an isotope of Br.

Br has 35 protons (its atomic number)

47 neutrons, that's why it is an Isotope (Br has always 45 neutrons)

As usual, Br has 35 electrons, if it represents a ion of net charge -1, it menas it won 1 e-.

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2 years ago

kondor19780726 [428]

Explanation:

It is known that 1 gram contains 1000 milligrams. And, mathematically we can represent it as follows.

$\frac{1 g}{1000 mg}$ or $\frac{1000 mg}{1 g}$

So, when we have to convert grams into milligrams then we simply multiply the digit with 1000. And, if we have to convert a digit from milligrams to grams then we simply divide it by 1000.

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2 years ago

In the chemical equation 3c2h4 how many atoms of carbon are represented

Scorpion4ik [409]

An example.
water is H2O

2 hydrogen, 1 oxygen

so the number to the right means how much of what is on the left.

so it looks like 2, because C2, but look at the 3 at the beginning. that means
3 (c2h4)

so 6 carbons, 12 hydrogen

the ratio of c2 to h4 doesn't change it's always 1:2.

but the 3 at the front is a different number relating to how much you have

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2 years ago