3 years ago

BRAINLIST!!

Chemistry

2 answers:

Natali5045456 [20]3 years ago

6 0

B erosion is the answer

Montano1993 [528]3 years ago

5 0

Answer is B erosion!!!!

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A solution of NaOH has a concentration of 25.00% by mass. What mass of NaOH is present in 0.250 g of this solution? Use the peri

meriva

The concentration of NaOH is 25.00% by mass, it means that 25.00% of the mass of the solution is of NaOH. Hence:

$m_{NaOH}=25.00\%\times m_{solution}\Longrightarrow m_{NaOH}=\dfrac{25}{100}\times 0.250~g\iff\\\\\boxed{m_{NaOH}=0.0625~g}$

7 0

3 years ago

Read 2 more answers

Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. the mol

Softa [21]

To determine molecular formula, we first need to find out its empirical formula,
Carbon. Hydrogen. Nitrogen. Oxygen
Mass. 49.98g. 5.19g. 28.85g. 16.48g
Mole. 4.165. 5.19. 2.06. 1.03
Divide 4. 5. 2. 1
by
smallest
So by comparing the mole ratio from the table above, i hope u understand the table
The empirical formula is C4H5N2O
given molecular mass = 194.19g
so
(C4H5N2O) n= 194.19
(48+5+28+16)n=194.19
n= 2
molecular formula = C8H10N4O2

7 0

3 years ago

Can you please help me to answer this? I give you a brainlest!

zysi [14]

9 is B
6 is A
i’m not sure about the rest

5 0

3 years ago

[03.04]When one atom of potassium (K) combines with one atom of fluorine (F), an ionic bond forms, resulting in potassium fluori

dybincka [34]

Heyo, I believe that the answer would be D. The valence electrons are given up by the K and gained by the F.

3 0

3 years ago

What is the formula for Na+1 and SO3^-2

KATRIN_1 [288]

Answer:

Na₂SO₃

Explanation:

We can use the criss-cross method to work out the formula.

1. Write the symbols of the anion and cation.

Na¹⁺ SO₃²⁻

2. Criss-cross the numbers of the charges to become the subscripts of the other ion (see image).

3. Write the formula with the new subscripts.

Na₂(SO₃)₁

4. Omit all subscripts that are 1.

The formula becomes Na₂SO₃.

8 0

3 years ago