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AnnZ [28]
3 years ago
11

What statement correctly describes gravity

Chemistry
2 answers:
Sedbober [7]3 years ago
3 0

Answer:

B

Explanation:

patriot [66]3 years ago
3 0

Answer:

B: An attractive force that acts between all objects without contact.

Explanation:

I took the test

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Which of the following types of fossils is most commonly associated with wood?
DanielleElmas [232]
Petrified fossils, they are made of wood that becomes petrified from pressure and lack of oxygen.
5 0
4 years ago
Copper oxide, CuO, reacts with hydrochloric acid, HCI, to produce copper chloride, CuCL2 and water
spayn [35]

Explanation:

El óxido de cobre (II), también llamado antiguamente óxido cúprico ({\displaystyle {\ce {CuO}}}{\displaystyle {\ce {CuO}}}), es el óxido de cobre con mayor número de oxidación. Como mineral se conoce como tenorita.

{\displaystyle {\ce {2Cu + O2 = 2CuO}}}{\displaystyle {\ce {2Cu + O2 = 2CuO}}}

Aquí, se forma junto con algo de óxido de cobre (I) como un producto lateral, por lo que es mejor prepararlo por calentamiento de nitrato de cobre (II), hidróxido de cobre (II) o carbonato de cobre (II):

{\displaystyle {\ce {2 Cu(NO3)2 = 2 CuO + 4 NO2+ O2}}}{\displaystyle {\ce {2 Cu(NO3)2 = 2 CuO + 4 NO2+ O2}}}

{\displaystyle {\ce {Cu(OH)2 (s) = CuO (s) + H2O (l)}}}{\displaystyle {\ce {Cu(OH)2 (s) = CuO (s) + H2O (l)}}}

{\displaystyle {\ce {CuCO3 = CuO + CO2}}}{\displaystyle {\ce {CuCO3 = CuO + CO2}}}

El óxido de cobre (II) es un óxido básico, así se disuelve en ácidos minerales tales como el ácido clorhídrico, el ácido sulfúrico o el ácido nítrico para dar las correspondientes sales de cobre (II):

{\displaystyle {\ce {CuO + 2 HNO3 = Cu(NO3)2 + H2O}}}{\displaystyle {\ce {CuO + 2 HNO3 = Cu(NO3)2 + H2O}}}

{\displaystyle {\ce {CuO + 2 HCl =CuCl2 + H2O}}}{\displaystyle {\ce {CuO + 2 HCl =CuCl2 + H2O}}}

{\displaystyle {\ce {CuO + H2SO4 = CuSO4 + H2O}}}{\displaystyle {\ce {CuO + H2SO4 = CuSO4 + H2O}}}

Reacciona con álcali concentrado para formar las correspondientes sales cuprato.

{\displaystyle {\ce {3 XOH + CuO + H2O = X3[Cu(OH)6]}}}{\displaystyle {\ce {3 XOH + CuO + H2O = X3[Cu(OH)6]}}}

Puede reducirse a cobre metálico usando hidrógeno o monóxido de carbono:

{\displaystyle {\ce {CuO + H2 = Cu + H2O}}}{\displaystyle {\ce {CuO + H2 = Cu + H2O}}}

{\displaystyle {\ce {CuO + CO = Cu + CO2}}}{\displaystyle {\ce {CuO + CO = Cu + CO2}}}

6 0
3 years ago
The decomposition of water produces 50g of Hydrogen gas and 75 g of oxygen gas. How much water
Lostsunrise [7]

84.24 g of water (H₂O)

Explanation:

We have the following chemical reaction:

2 H₂O → 2  H₂ + O₂

Now we calculate the number of moles of products.

number of moles = mass / molar weight

number of moles of H₂ = 50 / 2 = 25 moles

number of moles of O₂ = 75 / 32 = 2.34 moles

We see from the chemical reaction that for every 2 moles of H₂ produced there are 1 mole of O₂ produces for every 25 moles of H₂ produced there are 12.5 moles of O₂ but we only have 2.35 moles of O₂ available. The O₂ will be the limiting quantity from which we devise the following reasoning:

if        2 moles of H₂O  produces 1 mole of O₂

then  X moles of H₂O  produces 2.34 mole of O₂

X = (2 × 2.34) / 1 = 4.68 moles of H₂O

mass = number of moles × molar weight

mass of H₂O = 4.68 × 18 = 84.24 g

Learn more about:

limiting reactant

brainly.com/question/7144022

brainly.com/question/6820284

brainly.com/question/14108423

#learnwithBrainly

4 0
3 years ago
How many boron (B) and sulfur (S) atoms are in B253?
Kay [80]

Answer:

2 boron and 3 sulfur

Explanation:

The subscript/ number behind and under is a subscript this tells you how many atoms there are

5 0
3 years ago
Question 33 Saved
Tatiana [17]

Answer:

The third option

Explanation:

If people have found more volcanic rock layers in the past that would mean that volcanic activity was more common in the past.

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3 years ago
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