Вона попросила ще одну склянку, бо чай з лимоном був надто гарячий.

Because the subject is вона (she), and in the past tense Ukrainian verbs agree with gender and number.

• попросив = he asked
• попросила = she asked
• попросило = it asked
• попросили = they asked

So Вона попросила means She asked.

Because попросила takes a direct object, and the direct object here must be in the accusative case.

The basic form is:

• одна склянка = one glass

But as a direct object, it changes to:

• одну склянку = one glass

Both words change because they are feminine singular:

• одна → одну
• склянка → склянку

So попросила ще одну склянку literally means asked for one more glass.

Here ще means another, one more, or an additional.

So:

• ще одну склянку = one more glass / another glass

Be careful: ще can also mean still or yet in other contexts. Its exact meaning depends on the sentence.

This is about verb aspect, which is very important in Ukrainian.

• просила = imperfective, focusing on the process or repeated action of asking
• попросила = perfective, focusing on a completed request

In this sentence, the speaker is talking about a single completed action: she made the request. That is why попросила is the natural choice.

After з meaning with, Ukrainian normally uses the instrumental case.

• лимон = lemon
• з лимоном = with lemon

So:

• чай з лимоном = tea with lemon

This is a very common pattern:

• кава з молоком = coffee with milk
• бутерброд з сиром = sandwich with cheese

Because the subject of that part of the sentence is чай, and чай is a masculine noun.

So the past tense of бути agrees with чай:

• чай був = the tea was
• кава була = the coffee was
• молоко було = the milk was

Even though the sentence began with вона, the verb був belongs to чай, not to вона.

Because гарячий is part of the predicate after був.

In Ukrainian, after бути (to be), adjectives usually stay in the nominative:

• чай був гарячий = the tea was hot

Since чай is masculine singular, the adjective is also masculine singular:

• гарячий

So this is normal agreement:

• чай → masculine singular
• був гарячий → masculine singular forms

Надто means too, overly, or excessively.

So:

• надто гарячий = too hot

This is different from дуже:

• дуже гарячий = very hot
• надто гарячий = too hot

So надто suggests that the tea was hotter than was comfortable or practical.

Yes, бо means because, and тому що can also mean because.

• бо is short and very common in everyday speech
• тому що is also common, sometimes slightly fuller or more formal in tone

So these are both possible:

• ..., бо чай з лимоном був надто гарячий.
• ..., тому що чай з лимоном був надто гарячий.

In this sentence, бо sounds natural and conversational.

Not exactly.

• склянка usually means a drinking glass or tumbler
• чашка means a cup

So if you translate too quickly, you might think склянка means cup, but it usually means an actual glass.

In this sentence, the idea is probably that she wanted another glass because the tea with lemon was too hot—perhaps to pour it into and cool it faster.

Because ще одну склянку is the most natural order.

In Ukrainian, ще usually comes before the number or quantity word it modifies:

• ще один
• ще одна
• ще одну

So:

• ще одну склянку = one more glass

Other word orders are sometimes possible for emphasis, but this version is the normal neutral one.

You should think of it as a noun plus a prepositional phrase:

• чай = tea
• з лимоном = with lemon

Together:

• чай з лимоном = tea with lemon

This is a very productive pattern in Ukrainian. You can build many similar phrases the same way:

• вода з льодом = water with ice
• чай з медом = tea with honey
• каша з маслом = porridge with butter

Yes, it sounds natural.

It has a normal structure:

• Вона попросила ще одну склянку = She asked for another glass
• бо чай з лимоном був надто гарячий = because the tea with lemon was too hot

It is clear, grammatical, and idiomatic. The only thing a learner might wonder about is the real-life situation: why ask for another glass? But grammatically and stylistically, the sentence is perfectly normal.