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3 years ago

Typically, a dichotomous key moves from the _______ to the specific traits when helping us to identify organisms.

Chemistry

2 answers:

Oksanka [162]3 years ago

7 0

Answer:

General

Explanation:

The reason it is general is because the unknown traits wouldn't be helpful when it comes to the specific traits identifying organisms.

Romashka-Z-Leto [24]3 years ago

5 0

Answer:

a general

Explanation:

i just did it on

usatestprep

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Identify if you should use millimeters, centimeters, meters, or kilometers to measure each example.

ira [324]

Answer:

1. unless you live right around the block, distance from home to school should be in kilometers.

2. centimeters

3. millimeters

4. meters (the average is about 2 meters)

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3 years ago

Read 2 more answers

Calculate the heat in joules "Q" needed to raise 27.0 g of water from 10.0 °C to 90.0 °C.

Morgarella [4.7K]

Answer:

9028.8 J

Explanation:

The equation for working out the amount of thermal energy required is q = m c Δ T , where q is the amount of energy, m is the mass being heated up in grams, c is the specific heat capacity of what you're heating up in joules per gram per kelvin, and Δ T is the change in temperature in Kelvin.(Change in temperature will always give the same value,no matter Celsius or Kelvin)

mass = 27g, assuming specific heat capacity of water is 4.18 J/g*K, and the change in temperature is 90-10(=80) , the energy needed to raise : 80 × 27 × 4.18 = 9028.8 J

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3 years ago

Which type of chemical protective clothing (cpc) protects the wearer against chemical vapors or gases?

kiruha [24]

The CPC equipment ensures the safety and health of workers. Management and employees must be aware of the hazards: the type of chemical, the physical state (liquid, solid or gas), and the physiological effect (toxic, carcinogen, asphyxiant, corrosive, etc.).
Vapor-protective clothing is type of chemical protective clothing (CPC) that protects the wearer against chemical vapors or gases.

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3 years ago

Determine what mass of carbon monoxide and what mass of hydrogen are required to form 6.0 kg of methanol by the reaction CO(g) +

siniylev [52]

Answer:

5250 grams or 5.25 kg of carbon monoxide and 375 grams of hydrogen are required to form 6 kg of methanol.

Explanation:

The balanced reaction:

CO (g) + 2 H₂ (g) -> CH₃OH (l)

By stoichiometry of the reaction, the following amounts of moles of each compound participate in the reaction:

CO: 1 mole
H₂: 2 moles
CH₃OH: 1 mole

Being the molar mass of each compound:

CO: 28 g/mole
H₂: 1 g/mole
CH₃OH: 32 g/mole

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

CO: 1 mole* 28 g/mole= 28 grams
H₂: 2 moles* 1 g/mole= 2 grams
CH₃OH: 1 mole* 32 g/mole= 32 grams

Being 6 kg equivalent to 6000 grams (1 kg= 1000 grams), you can apply the following rules of three:

If by stoichiometry 32 grams of methanol are formed from 28 grams of carbon monoxide, 6000 grams of methanol are formed from how much mass of carbon monoxide?

$mass of carbon monoxide=\frac{6000 grams of methanol*28 grams of carbon monoxide}{32 grams of methanol}$

mass of carbon monoxide= 5250 grams= 5.25 kg

If by stoichiometry 32 grams of methanol are formed from 2 grams of hydrogen, 6000 grams of methanol are formed from how much mass of hydrogen?

$mass of hydrogen=\frac{6000 grams of methanol*2 grams of hydrogen}{32 grams of methanol}$

mass of hydrogen= 375 grams

<u><em>5250 grams or 5.25 kg of carbon monoxide and 375 grams of hydrogen are required to form 6 kg of methanol. </em></u>

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3 years ago

How do i make chrystals

amid [387]

Answer:

1. In the beaker, stir 1/2 cup of Epsom salts with 1/2 cup of very hot tap water for at least one minute. ...

2. Add a couple drops of food coloring if you want your crystals to be colored.

3. Put the beaker in the refrigerator.

4. Check on it in a few hours to see a beaker full of epsom salt crystals!

Explanation:

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3 years ago