3,202 Answered Questions for the topic Science

06/18/21

#### Please Read the Question Below !

A block of mass 0.243 kg is placed on top of a light, vertical spring of force constant 4 975 N/m and pushed downward so that the spring is compressed by 0.097 m. After the block is released from... more
Science

06/18/21

06/16/21

#### Answer the problem below or in the description:

The rate of decay of radium is said to be proportional to the amount of radiumpresent. If the half-life of radium is 1700 years and there are 400 grams on hand now. Given the exponential decay... more

06/15/21

#### 4NH3 + 5O2 = 4NO + 6H2O How many moles of NO are produced if 6.96 grams of NH3 react with an excess amount of oxygen?

Grateful for any help! If you could explain the work that'd be helpful as well!

06/15/21

#### 4NH3 + 5O2 = 4NO + 6H2O If you made with 9.67 moles of H20, how many moles of NO were also produced?

Already balanced equation I keep getting this one wrong and I'm not sure if it's my setup or if I'm dividing something wrong. Grateful for any help given!
Science Biology

06/14/21

#### In peas, the color yellow is dominant to the color green. A heterozygous yellow pea plant is crossed with a green pea plant.

In peas, the color yellow is dominant to the color green. A heterozygous yellow pea plant is crossed with a green pea plant. Complete the Punnett Square below to determine the outcome of the... more
Science

06/14/21

#### A syringe initially has 5 kPa of pressure exerted on it and has a volume of 6 mL of air in it. When the pressure on the syringe is reduced to 2.5 KPa what will the new volume of gas be?

A syringe initially has 5 kPa of pressure exerted on it and has a volume of 6 mL of air in it. When the pressure on the syringe is reduced to 2.5 KPa what will the new volume of gas be?

06/13/21

#### Crop rotation (finding source)

Question: Why is crop rotaion important?- What are 2 primary sources for this topic?- What are at least 2 different kinds of secondary sources? Make sure one of them is a peer-reviewed article from... more

06/12/21

#### Hello. Please don’t bypass my question. My homework is due in 30 minutes and I need lots of assistance!

2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2OIn the above equation how many grams of N2 can be made when 170 grams of CuO are consumed?﻿Round your answer to the nearest tenth. If you answer is a whole number... more

06/12/21

#### my homework is due in a few hours and I am confused. Please... help... quickly!

Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.   ­­2NaClO3­ --> 2NaCl +3O2  How many grams of NaClO3­ were needed to produce 6 grams of O2? Round... more

06/12/21

#### Please, Read the Question Below :)

A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 594 N. As the elevator later stops, the scale reading is 386 N. Assume the magnitude of the... more

06/12/21

#### Please, Read the Question Below :)

You can feel a force of air drag on your hand if you stretch your arm out of the open window of a speeding car. [Note: Do not endanger yourself by performing this experiment.] Calculate this force,... more

06/12/21

#### Please, Read the Question Below :)

The mass of a sports car is 1400 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.250 and the frontal area is 2.30 m2. Neglecting all other sources of friction, calculate... more

06/12/21

#### (a) A sphere made of plastic has a density of 1.08 g/cm^3 and a radius of 7.50 cm. It falls through air of density 1.20 kg/m^3 and has a drag coefficient of 0.500. What is its terminal speed (in m/s)?

(b) From what height (in m) would the sphere have to be dropped to reach this speed if it fell without air resistance?

06/12/21

Below is the problem that I want to be solved, it specifically has three sections needed to be answered which are, a, b and c.https://paste.pics/2f1f6c5e739499ca2da41849e159455d

06/11/21

#### (Stoichiometry)

1 C₅H₁₂(g) + 8 O₂(g) → 5 CO₂(g) + __ H₂O(g) when balancing the above equation, how many moles of water are produced when 1 mole of C₅H₁₂ reacts with excess Oxygen Gas?

06/11/21

#### (Stoichiometry)

1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) - Identify the Limiting Reactant in the following problem and identify how much of the excess reactant remains after the reaction has reached completion.... more

06/11/21

#### Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more

06/10/21

#### Adipic acid, H2C6H8O4, used to produce nylon, is made commercially by reaction of Cyclohexane (C6H12) and oxygen gas (O2).

a. write the balanced chemical equation for the given reaction above.b. is the reaction exothermic or endothermic? Explain.c. how many grams of Adipic acid will be formed if 25.0g cyclohexane... more

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