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3 years ago

What is a control used for in an experiment?

1 answer:

6 0

The control is what you keep the same for each one. For example if you are doing an experiment with plants say you water one with lemon juice, one with milk and one with warm water. The control would be they all have the same amount of sun light and soil. So the growing is equal to keep the experiment fair.

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A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next fe

aleksley [76]

Answer:

until the next harvest, and seed must be held for the next season's ... successful grain storage is the moisture content of the crop. ... or both. If ambient temperatures are low, then air alone may cool the ... allow some of the drying to take place naturally while the crop ... employed to cool grain that has been placed in storage.

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3 years ago

A chemist determines by measurements that 0.0850 moles of oxygen gas participate in a chemical reaction. Calculate the mass of o

Shtirlitz [24]

Answer:

The mass of oxygen that participates is 2.72g

Explanation:

Oxygen gas is O2.

O2 has the molar mass of approximately 32.

Mass can be calculated by multiplying the molar mass and the moles.

Moles = Mass/Molar mass

therefore, Mass= Moles*Molar mass

Which is equal to 32*0.085= 2.72g

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3 years ago

You are asked to separate sand and sodium chloride.

Igoryamba

Answer:

Explanation:nono

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5 0

3 years ago

Read 2 more answers

Consider the following reaction at equilibrium. What effect will increasing the

lina2011 [118]

Answer:

The position of equilibrium will move to the right

Explanation:

$\rm Fe_{3}O_{4}(g) + CO(g) \rightleftharpoons 3FeO(s) +CO_{2}(g); \Delta H^{\circ} = +35.9 \, kJ$

The enthalpy of reaction is positive, so the reaction is endothermic and we can consider the heat as a "reactant".

We can rewrite the equation as

$\rm Fe_{3}O_{4}(g) + CO(g) +35.9 \, kJ \rightleftharpoons 3FeO(s) +CO_{2}(g)$

According to Le Châtelier's Principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

In this problem, the stress is the increase in temperature (addition of heat).

If we add heat, the position of equilibrium will move to the right to get rid of the heat.

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3 years ago

Which type of soil is the most porus

In-s [12.5K]

Answer: Clay

Explanation:

6 0

3 years ago