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2 years ago

Think of at least 10 things you can do to help preserve our freshwater or to clean up our polluted water

2 answers:

4 0

Here’s another 5 things to add on to the other persons answer.

1: Dont flush any out of date medicines down the toilet or drain

2: Dont put anything except water down drains

3:Pick up after pets

4: Avoid using chemical fertilizers

5:Choose non-toxic household products whenever possible

Naily [24]2 years ago

3 0

Answer:

#1 Clean up trash so, they don't get into sewers.
#2 Don't use up water.

#3 Do small loads of laundry

#4 Keep shower time minimal

#5 Pay your taxes to the government can fix pipe lines or fix lead-made pipes

( Five ideas, that's all i can think of)

Explanation:

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What is the mass of a sample of metal that is heated from 58.8°C to 88.9°C with a

Vadim26 [7]

Answer:

$\boxed {\boxed {\sf 333 \ grams}}$

Explanation:

We are asked to find the mass of a sample of metal. We are given temperatures, specific heat, and joules of heat, so we will use the following formula.

$Q= mc \Delta T$

The heat added is 4500.0 Joules. The mass of the sample is unknown. The specific heat is 0.4494 Joules per gram degree Celsius. The difference in temperature is found by subtracting the initial temperature from the final temperature.

ΔT= final temperature - initial temperature

The sample was heated from 58.8 degrees Celsius to 88.9 degrees Celsius.

ΔT= 88.9 °C - 58.8 °C = 30.1 °C

Now we know three variables:

Q= 4500.0 J
c= 0.4494 J/g°C
ΔT = 30.1 °C

Substitute these values into the formula.

$4500.0 \ J = m (0.4494 \ J/g \textdegree C)(30.1 \textdegree C)$

Multiply on the right side of the equation. The units of degrees Celsius cancel.

$4500.0 \ J = m (13.52694 J/g)$

We are solving for the mass, so we must isolate the variable m. It is being multiplied by 13.52694 Joules per gram. The inverse operation of multiplication is division, so we divide both sides by 13.52694 J/g

$\frac {4500.0 \ J }{13.52694 J/g}= \frac{m (13.52694 J/g)}{13.52694 J/g}$

The units of Joules cancel.

$\frac {4500.0 \ J }{13.52694 J/g}= m$

$332.6694729 \ g =m$

The original measurements have 5,4, and 3 significant figures. Our answer must have the least number or 3. For the number we found, that is the ones place. The 6 in the tenth place tells us to round the 2 up to a 3.

$333 \ g \approx m$

The mass of the sample of metal is approximately 333 grams.

8 0

2 years ago

If approximately equal volumes of an acid and a base of equal strengths are combined, the resulting solution should have a pH of

Masja [62]

Answer : The resulting solution will have a pH of 7.

Explanation:

Whenever acid and base reacts with each other to form water molecule is called Neutralization reaction. This water molecules is formed from the hydronium ion ( $H^+$ ) from acid and hydroxide ion( $OH^-$ ) from base.

When the equal volumes of acid and base of equal strength are combined, the resulting pH of the solution becomes 7.

The pH 7 value means that the solution is neutral.

4 0

3 years ago

Read 2 more answers

How Mendeleev's systematic approach resulted in the development of his Periodic Table of elements.

tensa zangetsu [6.8K]

I just wanna know what does that even mean

6 0

2 years ago

Which of these statements is true?

vichka [17]

All molecules are made up of atoms. N2 O2 and H2 exist in molecule form and not in atomic form.
They exist freely in nature as molecules.
According to above explanation,
B. Some elements found in nature exist as molecules, is the correct answer.

3 0

2 years ago

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How many moles of KCl are required to prepare 1.50 L of 5.4 M KCl?

puteri [66]

5.4 M = moles of solute / 1.50 L

Multiply both sides by 1.50 L to isolate moles of solute on the right. 

8.1 mol = moles of solute

6 0

2 years ago

Read 2 more answers