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Scrat [10]
3 years ago
7

Elemental mercury combines with oxygen to make mercury oxide. write a balanced equation

Chemistry
1 answer:
Ilia_Sergeevich [38]3 years ago
6 0
Hg + O2 --> HgO + O

Note that Mercury has a variable valency. 

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you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work what is the efficient of the ram
egoroff_w [7]
Efficiency of the ram is calculated by dividing the work done by the work or energy that is exerted to do so. This is calculated through the equation,

     S = ((Wout) / (Win)) x 100%

Substiuting the known values to the equation.

    S = (153 J)/(185 J) x 100%

Efficiency = 82.7%. 
7 0
4 years ago
Western art criticism unique in that
grandymaker [24]

Answer:

they are a lot tougher and are expecting only greatness, sort of like theater critiques.

Explanation:

8 0
3 years ago
How do scientists determine the number of neutrons in an isotope of an atom? O They find the number of protons. 0 They add the n
Elza [17]

Answer:

The three naturally-occurring isotopes of hydrogen. The fact that each isotope has one proton makes them all variants of hydrogen: the identity of the isotope is given by the number of protons and neutrons. From left to right, the isotopes are protium (1H) with zero neutrons, deuterium (2H) with one neutron, and tritium (3H) with two neutrons.

The term isotope is formed from the Greek roots isos (ἴσος "equal") and topos (τόπος "place"), meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table.[2] It was coined by a Scottish doctor and writer Margaret Todd in 1913 in a suggestion to chemist Frederick Soddy.

The number of protons within the atom's nucleus is called atomic number and is equal to the number of electrons in the neutral (non-ionized) atom. Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.

For example, carbon-12, carbon-13, and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13, and 14, respectively. The atomic number of carbon is 6, which means that every carbon atom has 6 protons, so that the neutron numbers of these isotopes are 6, 7, and 8 respectively.

4 0
3 years ago
Heated bricks or blocks of iron were used long ago to warm beds. A 1.49 -kg block of iron heated to 155 Celsius would release ho
AlekseyPX
Specific heat capacity= Quantity of heat/massxΔT
Shc of iron (constant)= 0.4494J/³C for 1g
1.49kg=1490g
Q=1490x(22-155)x0.4494
Q=<span>89057.598J</span>
6 0
3 years ago
Synthetic fibers, like plastic, are derived from organic compounds. These fibers have been chemically changed by humans to last
Anarel [89]

The downside of this is that the longer lasting material is more difficult to break down.

Both natural fibers and synthetic fibers are polymer materials. Polymer materials are materials that are made by the agglomeration of small molecules called monomers.

The natural fibers are less long lasting than the synthetic fibers. The downside of this is that the longer lasting material is more difficult to break down. As a result of these, synthetic fibers lead to environmental pollution problems.

Learn more: brainly.com/question/25140263

4 0
3 years ago
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