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Anika [276]
3 years ago
6

What is the first element of the periodic table

Chemistry
2 answers:
SVETLANKA909090 [29]3 years ago
8 0

Answer:

hydrogen

Explanation:

seropon [69]3 years ago
3 0

Answer:

hydrogen

Explanation:

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A student wants to prepare a solution of cobalt(II) fluoride with a known molarity.
swat32

Answer:

\large \boxed{\text{1.52 g}}

Explanation:

1. Calculate the moles of CoF₂ needed

n = \text{0.100 L} \times \dfrac{\text{0.157 mol}}{\text{1 L}}  = \text{0.0157 mol}

2. Calculate the mass of CoF₂

m = \text{0.0157 mol} \times \dfrac{\text{96.93 g}}{\text{1 mol}}  = \text{1.52 g}\\\\\text{ The student must measure out $\large \boxed{\textbf{1.52 g}}$ of cobalt(II) fluoride}

5 0
4 years ago
Why does the moon spin around the earth and the earth spins around the sun
liberstina [14]

This easy bro there is only one answer Gravity

but here my advance word

Sometimes the gravity of big objects would capture smaller ones in orbit. This could be one way the planet acquired the moon

7 0
4 years ago
For the unbalanced equation, what is the coefficient for c5h10 ?
marshall27 [118]
The answer is the coefficient is "1".
C₅H₁₀, now you see that there is no number with this and when there is no number or digit, it means the coefficient is one.
we use the coefficients to balance the equation of the reaction in such a way that number of the atoms of the elements in the reactants are equal to the number of atoms of different elements in the product, so that both sides are equal and balanced.
8 0
4 years ago
How many amu are there in 8.3g?
jasenka [17]

Answer:

4.998 × 10²⁴ amu

Explanation:

Given data:

Mass of substance = 8.3 g

Atomic mass unit = ?

Solution:

The mass of one mole of substance is equal the gram per mole of that substance.

atomic mass unit = g/mol

For 8.3 g:

8.3 × 6.022×10²³

4.998 × 10²⁴ amu

The number 6.022 × 10²³ is called Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

4 0
3 years ago
Which state of matter has a defined volume but no defined shape? 1 liquids 2 solids 3 gases 4 pizza​
stepan [7]

Answer:

the answer is liquids

8 0
4 years ago
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