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3 years ago

A ____________ is a large body that moves around a star?

Chemistry

2 answers:

Travka [436]3 years ago

4 0

Answer:

A Planet

Explanation:

The earth for example, is a large body that orbits the sun, our local star

Makovka662 [10]3 years ago

4 0

Answer:

Planet

Explanation:

Just like Earth orbits the sun (a star).

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Two liquids are analyzed and found to both be 85.7% carbon and 14.3% hydrogen. At 750 mmHg and 150 C, both are gases. At these c

vodomira [7]

Answer:

Molecular formula A: C₅H₁₀

Molecular formula B: C₇H₁₄

Explanation:

It is possible to obtain empirical formula of compounds using percent composition, thus:

C: 85.7% × (1mol / 12.01g) = 7.136 moles C

H: 14.3% × (1mol / 1.01g) = 14.158 moles H

Mole ratio of H:C is:

14.158mol / 7.136mol = 2

That means in compounds A and B you have 2 hydrogens per atom of carbon and empirical formila is:

CH₂

Using PV = nRT, moles of A and B are:

Where P is pressure (750mmHg / 760 = 0.987atm), V is volume (0.8000L), R is gas constant (0.082atmL/molK), and T is temperature (150°C +273.15 = 423.15K)

Moles A and B: n = PV / RT

n = 0.987atm×0.8000L / 0.082atmL/molK×423.15K

n = 0.0228 moles of A and B.

Using the mass of A and B it is possible to find molar mass of each compound:

A = 1.60g / 0.0228mol = 70.31g/mol

B = 2.22g / 0.0228mol = 97.56g/mol

As empirical formula of both compounds is CH₂, (molar mass = 14.03g/mol). Molecular formula of compounds is:

A = 70.31g/mol / 14.03g/mol = 5 → Molecular formula: 5×CH₂ = C₅H₁₀

B = 97.56g/mol / 14.03g/mol = 7 → Molecular formula: 7×CH₂ = C₇H₁₄

8 0

3 years ago

What the oxidation state of sulfur in sulfite?

RUDIKE [14]

Answer:

Explanation:

$SO^{-2} _{3}$ , Oxygen always works with -2. You multiply with the number of atoms -2*3= -6

S=x+(-6)=-2

x-6=-2 -> x= -2+6 -> x= +4

4 0

3 years ago

Read 2 more answers

The energy change ∆H associated with the reaction NBr3(g) + 3 H2O(g) → 3 HOBr(g) + NH3(g) is +81 kJ. NBr3 is arranged with all o

masha68 [24]

Answer:

155 kJ

Explanation:

The energy change will be the energy of the reactants less the energy of the products. And the energy of each compound is the sum of the energy of their bonds. Let's call y the N-Br strength.

3HOBR = 3x(459 + 201) = 1980 kJ

NH₃ = 3x386 = 1158 kJ

3H₂O = 3x(2x459) = 2754 kJ

NBr₃ = 3y

3y + 2754 - 1158 - 1980 = 81

3y -384 = 81

3y = 465

y = 155 kJ

6 0

3 years ago

How many grams of glucose(C6H12O6) are produced by 10.0 grams of water(H2O)?

GaryK [48]

Answer:

16.7 g of glucose

Explanation:

Convert grams of H₂O to moles. 0.555 mol

We can use the chemical equation to determine the theoretical yield. Based on the equation, for every 6 moles of H₂O, 1 mole of glucose is produced. The ratio of glucose moles to H₂O moles is 1/6.

Multiply the moles of H₂O by the ratio to find moles of glucose. 0.0925 mol

Convert moles of glucose to grams. 16.7 g

3 0

2 years ago

What is the mass of an object accelerating at 10 m/s2 when a force of 10 N is applied?

Alex Ar [27]

Answer:

Anaesthesia & Intensive Care Medicine

Volume 6, Issue 9, 1 September 2005, Page 294

Force, mass and acceleration

Author links open overlay panelPhilDalrympleaRichardGriffithsb

https://doi.org/10.1383/anes.2005.6.9.294

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Abstract

Force, mass and acceleration are everyday words but often used inaccurately. Force is a physical influence, which when applied to an object causes it to accelerate in the direction from which it was applied. Mass is the amount of matter in an object and is expressed in kilograms. Acceleration is the rate of change of velocity of an object in the same straight line of the unbalanced force. When forces become balanced, there is no net force and therefore no movement. Newton’s second law links these three terms and concerns the effect that an unbalanced force has on the motion of an object. It states that the rate of change of velocity of an object is directly proportional to the force applied and takes place in the direction of the force. It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s2). Thus, an object of constant mass accelerates in proportion to the force applied. Gravity is the variable force of attraction between any two objects. All matter possesses gravitational ‘pull’ towards other matter. The amount of gravity between two objects is dependent on their mass and the distance between their centres. The word ‘weight’ in its proper context refers to the downward vertical force exerted on an object as a result of the earth’s gravity. An object with greater mass is therefore subjected to a greater gravitational force (i.e. it has greater weight).

7 0

3 years ago