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3 years ago

Guys, please, please help!!

Chemistry

2 answers:

shutvik [7]3 years ago

6 0

Ookay

1) T
2) T
3) F

Hope i helped :)

GREYUIT [131]3 years ago

4 0

Here are your answers:

You can add grams and meters, but you cannot multiply grams and meters:

True

When making calculations, you should rely on the precision of your measured data:

True

If you are adding up the number of chairs in your classroom, you do not need to be concerned about significant digits in your calculation.

False

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Is the cyanide ion a strong or weak base?

11111nata11111 [884]

It's a weak base bacause H C N is weak

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What are benthos?

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3 years ago

Read 2 more answers

A steel beam that is 7.00 m long weighs 326 N. It rests on two supports, 3.00 m apart, with equal amounts of the beam extending

GrogVix [38]

Answer:

The answer to the question is

Suki is 1.12 m close to the end of the steel beam before the beam begins to tip

Explanation:

To solve the question we list out the known variables first

Length of steel beam, L = 7.00 m

Weight of steal beam W = 326 N

Distance between supports = 3.00 m

Weight of Suki = 555 N

By moments theory, the sum of moments about a point = 0

and assuming the steal beam is uniform, the weight of the beam will act at the center of the beam

As described the supports are 2.00 m from each end of the beam thus

taking moments about one of the support with Suki between the end of the beam and the support we have

Distance from center of beam to support = 1.5 m

Distance of Suki to the nearest support = x m

therefore 555 × x + 326 × 1.5 = 0

or x = -0.881 m on the other side of the support

Therefore Suki is (2 - 0.881) m or 1.12 m close to the end before the beam begins to tip

7 0

2 years ago

Question 21

Mumz [18]

There are 2 moles of O stones present in 88 grams of CO2. Why? Well, we can find the amount of moles present in 88 grams of CO2 by dividing the mass by the molar mass. The mass of CO2 comes out to be 88 grams. The molar mass of CO2 comes out to be 44 grams. Because 88 is the mass of CO2 and 44 is the molar mass of CO2, we can divide 88 by 44 to identify that there are 2.0 moles of O atoms present in 88 grams of CO2.

Your final answer: There are 2.0 moles of O atoms present in 88 grams of CO2. Your final answer to this question is D, or 2.0 moles. If you need to better understand, let me know and I will gladly assist you.

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2 years ago

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eimsori [14]

Explanation:

$h{}^{2} o$

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2 years ago