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3 years ago

6

I’m driving down the highway at 75.0 miles/hour, how fast is that in m/seconds?

1 answer:

Aliun [14]3 years ago

4 0

Answer:

1.25 miles/ 1 minute

60x1.25=7.50

Explanation:

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When water freezes into ice, sme of the properties have changed <br> What stays the same

larisa86 [58]

When water freezes into ice, some of the properties have change. What stays the same.

Answer: 1: Ice Melting is a physical change. When liquid water (H2O) freezes into a solid state (ice), it appears changed; However, this change is only physical as the the composition of the constituent molecules is the same: 11.19% hydrogen and 88.81% oxygen by mass.

Have a goood day!

5 0

2 years ago

An atom has no electrical charge because _____.

goblinko [34]

Hey there! Great question;) Answer:It is neutrally charged, because it has the same number of electrons(negatively charged ions) and protons(positively charged ions) I hope this helps;)

6 0

2 years ago

A gas at a pressure of 360 torrs and a volume of 750 ml. If the pressure becomes 1.5 atm what is the new volume?

r-ruslan [8.4K]

Answer:

V₂ = 236.84 mL

Explanation:

The relation between pressure and volume is inverse.

We can write it as follows :

$P_1V_1=P_2V_2$

We have,

P₁ = 360 torrs, V₁ = 750 mL, P₂ = 1.5 atm = 1140 torr.

So,

$V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{360\times 750}{1140}\\\\V_2=236.84\ mL$

So, the new volume of the gas is 236.84 mL.

4 0

2 years ago

In an exothermic reaction, chlorine reacts with 2.0200g of hydrogen to form 72.926g of hydrogen chloride gas. how many grams of

Artemon [7]

Answer : 70.906 grams of chlorine reacted with hydrogen

Explanation :

Step 1 : Write balanced chemical equation.

The balanced chemical equation for the reaction between hydrogen and chlorine gas is given below.

$H_{2} (g) + Cl_{2} (g) \rightarrow 2HCl(g)$

Step 2 : Find moles of H₂ gas.

The moles of H₂ can be found as

$mole = \frac{grams}{MolarMass}$

We have 2.0200 g of H₂ and molar mass of H₂ is 2.02 g/mol.

Let us plug in these values to find moles of H₂.

$mole =\frac{2.0200g}{2.02g/mol} = 1 mol$

We have 1 mol of H₂.

Step 3 : Find moles of Cl₂ using mole ratio.

The mole ratio of H₂ and Cl₂ is 1 : 1.

The moles of Cl₂ can be calculated as

$1 mol H_{2} \times\frac{1 mol Cl_{2}}{1 mol H_{2}} = 1 mol Cl_{2}$

Step 4 : Find grams of Cl₂.

Molar mass of Cl₂ gas is 70.096 g/mol

Mass of Cl₂ = $1 mol Cl_{2} \times\frac{70.906g}{mol} = 70.906 g$

We have 70.906 grams of Cl₂

4 0

2 years ago

Calculate the grams of NaCl (5.5 by mass) in 250 grams of commercial bleach solution

Naddik [55]

Mass of NaCl L 13.75 g

<h3>Further explanation</h3>

Given

The solution of 5.5% by mass

mass of commercial bleach solution : 250 g

Required

mass of NaCl

Solution

Percent mass (% w/w) = percent mass of solute in 100 g mass of solution

Solution = solute + solvent

Solute = NaCl

Solution = Commercial bleach

Can be formulated :

$\tt \%mass(w/w)=\dfrac{mass~solute}{mass~solution}\times 100\%$

Input given values in formula :

$\tt \%mass=\dfrac{mass~NaCl}{mass~commercial~bleach}\times 100\%\\\\5.5\%=\dfrac{mass~NaCl}{250}\times 100\%\\\\mass~NaCl=\boxed{\bold{13.75~g}}$

7 0

2 years ago