Which of these groups of animals are extinct?

Chemistry

1 answer:

Vilka [71]3 years ago

7 0

Dinosaur is the group of animals thats are extinct

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Which of Roger's actions were unsafe during the

slava [35]

Answer:

A or B

Explanation:

I would say A based off a lawn mower is a metal machine that carries gas in it to power it. It could be B as well, however taking a shower, radio, or going indoors isn't dangerous. So, I would say A or B. However, I'm leaning more towards A because you're taking the time outside in the rain to shut it off when it's full of gas.

8 0

3 years ago

How many moles are in 3.45 g of Na2O?Round your answer to three significant

Neporo4naja [7]

Answer: There are 0.056 moles present in 3.45 g of $Na_{2}O$ .

Explanation:

Given : Mass = 3.45 g

Moles is the mass of substance divided by its molar mass.

Hence, moles of $Na_{2}O$ (molar mass = 61.98 g/mol) is as follows.

$Moles = \frac{mass}{molar mass}\\= \frac{3.45 g}{61.98 g/mol}\\= 0.056 mol$

Thus, we can conclude that there are 0.056 moles present in 3.45 g of $Na_{2}O$ .

6 0

3 years ago

What is the definition of steam

VikaD [51]

Steam is the vapor that water turns into when heated, which forms a white mist of minuscule water droplets in the air

3 0

3 years ago

Explain why the molar ratio is needed to determine the theoretical mass ratios.

choli [55]

Answer:

The overview of the subject is outlined underneath in the summary tab.

Explanation:

The molar ratio seems to be essentially a balanced chemical equilibrium coefficient that implies or serves as a conversion factor for the product-related reactants.
This ratio just says the reactant proportion which reacts, but not the exact quantity of the reacting product. Consequently, the molar ratio should only be used to provide theoretical instead of just a definite mass ratio.

3 0

3 years ago

An alternative definition of electronegativity is Electronegativity= constant (I.E — E.A.) where I.E. is the ionization energy a

Kazeer [188]

Answer:

The electronengativity values of given elements is as follows.

Fluorine - 4

Chlorine -3

Bromine - 2.9

Iodine- 2.5

Explanation:

Electronegativity =consant (I.E-E.A)