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3 years ago

Flammabilty. Is a chemical property that tells whether a substance reacts in the presence of carbon dioxide try or false

2 answers:

8 0

False

Flammability occurs under extreme amounts of heat spark, and any other forms of ignition. A fire needs oxygen to spread not carbon dioxide.

beks73 [17]3 years ago

4 0

Answer:

False

Explanation:

Flammability is a chemical property that tells whether a substance reacts in the presence of extreme heat, spark, or another form of ignition.

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Is there a way for me to get extra switches to switch my home Xbox, I already used all five and the extra one too. If there is n

Anastaziya [24]

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2 years ago

How are the atomic number and the number of protons related to each other?

SpyIntel [72]

Answer:

Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.

Explanation:

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3 years ago

Suppose you need to prepare 141.9 mL of a 0.223 M aqueous solution of NaCl. What mass of NaCl do you need to use to make the sol

Afina-wow [57]

Answer:

1.811 g

Explanation:

The computation of the mass need to use to make the solution is shown below:

We know that molarity is

$Molarity = \frac{Number\ of\ moles}{Volume\ in\ L}$

So,

$Number\ of\ moles = Molarity\ \times Volume\ in\ L$

$= 0.223\times 0.141$

= 0.031 moles

Now

$Mass = moles \times Molecualr\ weight$

where,

The Molecular weight of NaCl is 58.44 g/mole

And, the moles are 0.031 moles

So, the mass of NaCL is

$= 0.031 \times 58.44$

= 1.811 g

We simply applied the above formulas

3 0

2 years ago

What is the atomic number of hydrogen??

Nataly_w [17]

The number is is surely 1

5 0

3 years ago

How many grams of KNO3 must be dissolved to create 7.25L a 0.200M solution?

timofeeve [1]

Answer:

146.6 g

Explanation:

First we calculate how many KNO₃ moles are there in 7.25 L of a 0.200 M solution, using the definition of molarity:

Molarity = moles / liters

Molarity * liters = moles

0.200 M * 7.25 L = 1.45 moles

Then we convert 1.45 moles of KNO₃ into grams, using its molar mass:

1.45 mol * 101.103 g/mol = 146.6 g

7 0

2 years ago