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2 years ago

What is the density of an object with a mass of 53.7 g and a volume of 27.19 ml?

Chemistry

1 answer:

11111nata11111 [884]2 years ago

3 0

The density is 158.2

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The atomic number is equal to

Yuri [45]

1. “what forms of energy conversions occur during the process of photosynthesis? (How does energy transform?) 2. What is missing from the food web but is essential to maintain equilibrium? A. Soil B.water C. Decomposers D. Oxygen

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2 years ago

How do scientists use radioactive decay to date fossils

grin007 [14]

The clearer answer is they measure the remaining carbon, and the less that there is the older the fossil is.

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2 years ago

Combustion of 9.511 grams of c4h10 will yield ____ grams of CO2

Flauer [41]

Answer:

$\boxed{28.81}$

Explanation:

We know we will need an equation with masses and molar masses, so let’s gather all the information in one place.

M_r: 58.12 44.01

2C₄H₁₀ + 13O₂ ⟶ 8CO₂ + 10H₂O

m/g: 9.511

1. Moles of C₄H₁₀

$\text{Moles of C$_{4}$H$_{10} $} = \text{ 9.511 g C$_{4}$H$_{10} $} \times \dfrac{\text{1 mol C$_{4}$H$_{10} $}}{\text{ 58.12 g C$_{4}$H$_{10} $}} = \text{0.1636 mol C$_{4}$H$_{10}$}$

2. Moles of CO₂

The molar ratio is 8 mol CO₂:2 mol C₄H₁₀

$\text{Moles of CO}_{2} =\text{0.1636 mol C$_{4}$H$_{10} $} \times \dfrac{\text{8 mol CO}_{2}}{\text{2 mol C$_{4}$H$_{10}$}} = \text{0.6546 mol CO}_{2}$

3. Mass of CO₂

$\text{Mass of CO}_{2} = \text{0.6546 mol CO}_{2} \times \dfrac{\text{44.01 g CO}_{2}}{\text{1 mol CO}_{2}} = \textbf{28.81 g CO}_{2}\\\\\text{The combustion will form $\boxed{\textbf{28.81 g CO}_{2}}$}$

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2 years ago

Hydrochloric acid (HCl) and sodium hydroxide (NaOH) react to form water and sodium chloride (NaCl). If you have 2.87 g of HCl, 3

wlad13 [49]

Answer:

2.86g

Explanation:

Mass of HCl = 2.87g

Mass of water = 3.75g

Mass of NaCl = 1.98g

Unknown:

Mass of NaOH reacted = ?

Solution:

The reaction expression is given as:

HCl + NaOH → NaCl + H₂O

According to the law of conservation of mass, the mass of reactants and products must be the same.

Mass of HCl + Mass of NaOH = Mass of NaCl + Mass of H₂O

2.87g + Mass of NaOH = 1.98g + 3.75g

Mass of NaOH = 1.98g + 3.75g - 2.87g = 2.86g

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2 years ago

Do baboons have a large brain?

olchik [2.2K]

Yes. Baboons have larger brains than chimpanzees

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2 years ago