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3 years ago

A certain system absorbs 350 joules of heat and has 230 joules of work done on it what is the value of

1 answer:

7 0

According to the law of conservation of mass, the amount of BARIUM present of the reactants is the same as the amount present in the products (the precipitate).

(11.21 g BaSO4) / (233.4 g/mol BaSO4) = 0.0480 mol BaSO4 and original barium salt

(10.0 g) / (0.0480 mol) = 208.3 g/mol

So it must have been BaCl2, because the molar mass of Barium is 137 which leave 71 grams left. Since Barium is a +2 charge, it means the atom next to it must be twice. Chlorine mass is 35, which twice is 71

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If an atom has no electric charge what can be said about the number or protons and electrons it contains

valina [46]

An atom has a net zero electric charge if the number of protons and electrons it contains are the same.

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4 years ago

You’re probably familiar with the sour taste of acidic lemon juice and the slippery feel of alkaline (basic) soap. In fact, thes

Nimfa-mama [501]

Answer:

9.606 grams of citric acid are present in 125 mL of a 0.400 M citric acid solution.

Explanation:

Molarity : It is defined as the number of moles of solute present in one liter of solution. Mathematically written as:

$Molarity=\frac{\text{Moles of solute}}{\text{volume of solution in L}}$

Moles of citric acid = n

Volume of the citric acid solution = 125 mL =125 × 0.001 L= 0.125 L

(1 mL = 0.001L)

Molarity of the citric acid solution = 0.400 M

$0.400 M=\frac{n}{0.12 5L}$

n = 0.400 M × 0.125 L = 0.05 moles

Mass of 0.05 moles of citric acid :

$0.05 mol\times 192.12 g/mol=9.606 g$

9.606 grams of citric acid are present in 125 mL of a 0.400 M citric acid solution.

5 0

3 years ago

When co2 levels are high the kidneys reabsorb this to compensate?

Crazy boy [7]

Elevated carbon dioxide mean too much acid in the blood. <span>Increase acid excretion (intercalated cells secrete H+ into tubules) and decrease bicarbonate excretion. They also make new bicarbonate to add to the plasma.</span>

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3 years ago

Read 2 more answers

I AM GIVING AWAY 80 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

dangina [55]

Answer:

thank you so much!!!!!!!!!!!!

6 0

3 years ago

Read 2 more answers

Which of the following you do NOT need to pay attention while using a centrifuge?

Phoenix [80]

Answer:

The radius of the centrifuge.

Explanation:

Hello,

Since the radius of the centrifuge is just a design parameter, it wouldn't be a cause of failure because it is used to know how many tubes could be fitted in into the centrifuge. On the other hand, keeping you attention away from other factors could turn into a failure as long as the sample could be poured down or just turn out inadequate for the expected results.

Best regards.

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3 years ago