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3 years ago

What experiment did Robert Millikan do

Chemistry

2 answers:

kari74 [83]3 years ago

6 0

Answer:

he used voltage adjustments to make charged oil drops float.

Explanation:

just did it on apex

klemol [59]3 years ago

5 0

I think this is the answer but he did the oil drop experiment, i hope this helps

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A ecosystem is ______ if it can continue to function over long periods of time

Alexandra [31]

A ecosystem is SUSTAINABLE if it can continue to function over long periods of time.

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3 years ago

Which example is a container holding a heterogeneous mixture? * 1 point Bowl of clear chicken broth. Balloon filled with He gas.

Margarita [4]

Answer:

Bowl of clear chicken broth

Explanation:

A bowl of clear chicken broth is a heterogenous mixture.

A heterogenous mixture is one in which the constituents exists in at least two different phases.
A chicken broth is a heterogenous mixture which exists in the liquid - solid state.
The broth is made up of simmered meat, vegetables and other recipes together.

Such mixtures can be:

Gas - liquids mixtures
Liquid - solid mixtures
Gas - solid mixtures

A broth is an extract from cooking chicken. Some vegetables and extract are mixed together in a nutritious blend.

6 0

3 years ago

Which characteristic might identify a substance as an Arrhenius acid?

goldfiish [28.3K]

Historically, the first chemical definition of an acid and a base was put forward by Svante Arrhenius, a Swedish chemist, in 1884. An Arrhenius acid is a compound that increases the H+ion concentration in aqueous solution. The H+ ion is just a bare proton, and it is rather clear that bare protons are not floating around in an aqueous solution. Instead, chemistry has defined the hydronium ion(H3O+) as the actual chemical species that represents an H+ion. H+ ions and H3O+ ions are often considered interchangeable when writing chemical equations (although a properly balanced chemical equation should also include the additional H2O). Classic Arrhenius acids can be considered ionic compounds in which H+ is the cation. Table 12.1 "Some Arrhenius Acids"lists some Arrhenius acids and their names.

contains hydrogen atoms. This is answer

6 0

3 years ago

viva [34]

Answer:

The second and third option are isotopes of Bromine

Z= 35 A = 79

A = 79 N= 44

Explanation:

Step 1: What are isotopes ?

⇒ Elements with same atomic number (Z) ( this means the same number of electrons and protons) but a different number of neutrons (N)

The atomic number (visible on the periodic table) is the number of protons.

The atomic mass is the sum of the protons (Z) and neutrons (N), and is showed as 'A'. So A = Z+N

If we look at the periodic table, we can see that the atomic number of bromine (Z) = 35. This means the amount of protons = 35. Since isotopes have the same amount of protons, all isotopes of bromine, have 35 protons.

1) Z = 79, A = 196

Z = protons = electrons .So this element has 79 protons, as well as 79 electrons.

196 = 79 + N ⇒ N = 196 - 79 = 117 neutrons

⇒Since it doesn't have 35 protons, it isn't an isotope of Bromine, but of Gold (Au): 196Au

2) Z = 35 , A = 79

Z = protons = electrons .So this element has 35 protons, as well as 35 electrons.

79 =35 + N ⇒ N = 79 - 35= 44 neutrons

⇒Since it does have 35 protons, it is an isotope of Bromine. This isotope has 44 neutrons

⇒ This is 79Br, which is a stable isotope of Bromine.

3) A=79, N = 44

Z = A - N ⇒ Z = 79 - 44 = 35

Z = protons = electrons .So this element has 35 protons, as well as 35 electrons. It also has 44 neutrons.

⇒Since it does have 35 protons, it is an isotope of Bromine, with 44 neutrons: 79Br

4) Z = 44, N = 44

Z = protons = electrons .So this element has 44 protons, as well as 44 electrons.

A = 44 + 44 ⇒ A = 88

⇒Since it doesn't have 35 protons, it isn't an isotope of Bromine, but of Ruthenium (Ru) : 88Ru

⇔So the second and third option are isotopes of Bromine

6 0

3 years ago

HELPPP ANSWERSSS !!!!! A. 10 B. 9 C. 7 D. 18

sweet [91]

C hope this helped you

6 0

4 years ago