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3 years ago

FIRST ONE TO ANSWER GETS BRAINLIEST!!

Chemistry

2 answers:

leva [86]3 years ago

8 0

Answer:

Explanation:

because the water’s speed increases and swimmers can be pulled down to the ocean floor.

Tpy6a [65]3 years ago

5 0

B. The neck is the most dangerous part of the rip current because the water’s speed increases and swimmers can be pushed farther into the ocean.

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A covalent bond formed when 2 atoms share 6 valence electrons between them is a ______ bond

sleet_krkn [62]

COVALENT BOND IS THE BOND EXISTING BETWEEN 2 ATOMS THAT SHARE 6 ELECTRONS

5 0

3 years ago

Tengo un volumen desconocido de gas mantenido a una temperatura de 115 K en un recipiente con una presión de 60.0 atm. Si al aum

Delvig [45]

Answer:

be nice bother high school bo

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3 years ago

Magnesium carbonate decomposes on heating to form magnesium oxide and carbon dioxide as shown.

lorasvet [3.4K]

C. 21.0g

that’s the aweeee

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3 years ago

A 1.0 g sample of hydrogen reacts completely with 19.0 g of fluorine to form a compound of hydrogen and fluorine. a. What is the

Rashid [163]

Explanation:tr

a) Molar mass of HF = 20 g/mol

Atomic mass of hydrogen = 1 g/mol

Atomic mass of fluorine = 19 g/mol

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{Molar mass of compound }}\times 100$

Percentage of fluorine:

$\frac{1\times 19 g/mol}{20g/mol}\times 100=95\%$

Percentage of hydrogen:

$\frac{1\times 1g/mol}{20 g/mol}\times 100=5\%$

b) Mass of hydrogen in 50 grams of HF sample.

Moles of HF = $\frac{50 g}{20 g/mol}=2.5 mol$

1 mole of HF has 1 mole of hydrogen atom.

Then 2.5 moles of HF will have:

$1\times 2.5 mol=2.5 mol$ of hydrogen atom.

Mass of 2.5 moles of hydrogen atom:

1 g/mol × 2.5 mol = 2.5 g

2.5 grams of hydrogen would be present in a 50 g sample of this compound.

c) As we solved in part (a) that HF molecules has 5% of hydrogen by mass.

Then mass of hydrogen in 50 grams of HF compound we will have :

5% of 50 grams of HF = $\frac{5}{100}\times 50 g=2.5 g$

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3 years ago

In which of the following are the symbol and name for the ion given correctly?

Andrej [43]

Fe2+:ferrous ion; fe3+ ferric ion are the one which are correctly named(Answer A) Sn2+ are called stannous ion while Sn4+ are known as stannic ions. Pb2+ are called lead (II) ions while Pb4+ are known as lead (IV) ion Co2+ are known was cobalt (II) ions while Co3+ are known as cobalt(IIi) ion.

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3 years ago